<olluscicidal composition

Abstract

A molluscicide composition comprising at least one phagostimulant e.g. wheat flour, cornflour; iron phosphate; and glucoheptonic acid or an acceptable salt thereof e.g. glucoheptonic acid sodium salt.

Description

FIELD OF THE INVENTION The present invention relates to molluscicidal compositions. In particular, the invention relates to molluscicidal compositions comprising iron phosphate and glucoheptonic acid, the production of said compositions and methods and uses thereof. BACKGROUND Terrestrial pulmonate gastropods, including slugs and snails (collectively referred to as u), are significant pests in agriculture, horticulture, and home gardens. As omnivores, these molluscs consume substantial amounts of plant material during daily foraging, posing a serious threat to vegetable gardens and crops throughout all stages of their growth cycle. Given their potential for destruction, effective control measures are necessary to protect growing plants from damage. Various methods have been developed to control pest molluscs, with the most common approach being the use of toxic substances known as molluscicides. These compounds include a range of chemicals such as sodium chloride (table salt), calcium arsenate, copper sulphate, metaldehyde, and iron chelated with EDTA (FeEDTA). Molluscicides are classified into two primary categories based on how they work: contact poisons and ingestible (or bait) poisons. Contact poisons work by requiring direct physical contact with the mollusc. They are either applied externally or placed on the ground, where the mollusc picks them up through its proteinaceous slime coat. The poison gradually accumulates in the mollusc’s body until a lethal dose is reached. However, a key limitation of contact poisons is their ineffectiveness if the molluscs do not come into contact with the active ingredient. If molluscs are hiding or enter the area after the poison is applied, they remain unaffected. This makes contact poisons generally unreliable as a control method. Ingestible, or bait-based, molluscicides must be consumed by the mollusc to be effective. These poisons are often favoured over contact poisons because the latter are less reliable. The challenge with bait molluscicides lies in creating a formula that is both palatable to molluscs and lethal. Sufficient amounts must be ingested to reach a fatal dose, but many compounds that are lethal are not appealing to molluscs, while palatable substances may not be effective as poisons. For instance, chemicals such as aluminium sulphate, copper sulphate, and borax are ineffective as bait poisons because molluscs do not find them palatable enough to ingest in lethal quantities. Ingestible poisons must strike a balance, being attractive enough for molluscs to consume in large amounts, while also acting slowly enough to prevent the mollusc from becoming ill or stopping its feeding before ingesting a fatal dose. However, the molluscicide compositions proposed on the market are made of materials that would not allow for an environmentally responsible use in the field. The use of EDTA as a chelate for iron for example does not meet the requirement for organic certification. Similarly bait-based molluscicides often use fillers or components that would meet the requirement for organic certification. Therefore, there is a current need for efficacious organically certified molluscicide compositions. SUMMARY OF THE INVENTION The present inventors have developed novel molluscicidal compositions that reduce dependence on synthetic pesticides. The compositions of the present invention are designed to be compatible with standard agricultural practices and therefore can seamlessly integrate into existing farming systems. The compositions of the invention can be used as a means of sustainable pest control, offering a scalable, non-toxic alternative to known pesticides whilst also addressing critical environmental, agricultural, and regulatory challenges. In particular, the present inventors have demonstrated for the first time that iron phosphate chelated with the carbohydrate acid glucoheptonic acid or a salt thereof (e.g. are effective molluscicidal agents. Whilst FeEDTA-Na has been described in the art as a molluscicide, prior to the present invention, the effectiveness of a carbohydrate-based iron chelate as a molluscicide has not previously been considered, let alone demonstrated. Further, the present inventors have generated molluscicidal active compositions comprising carbohydrate-based iron chelate and have demonstrated that these have improved molluscicidal activity compared with conventional molluscicides, including FeEDTA-Na based molluscicides. Thus, the inventors have molluscicidal active compositions with improved activity and that are capable of organic certification. Accordingly, the present invention provides a molluscicide composition comprising or consisting of: (a) at least one phagostimulant; (b) iron phosphate; and (c) glucoheptonic acid or an acceptable salt thereof. The glucoheptonic acid or acceptable salt thereof may be a sodium salt of glucoheptonic acid, optionally a-D-Glucoheptonic acid sodium salt. Said composition may further comprise or consist of an inert core, wherein the inert core is coated with a mixture of the at least one phagostimulant, iron phosphate and glucoheptonic acid or an acceptable salt thereof. The inert core may comprise or consist of an inorganic material and / or an organic material. The inert core may comprise or consist of an inorganic material selected from the group consisting of dolomite, lime, reactive and / or rock phosphate, gypsum, bentonite, kaolin, talc, attapulgite, diatomaceous clay, preferably inorganic material is dolomite. The inert core may comprise or consist of an organic material and the organic material is trass, worm castings, bat guano, chicken manure, seaweed or kelp meal, preferably wherein the inert core comprise or consists of trass, more preferably black solider fly larvae frass. The composition of the invention may: (a) comprise iron at an amount of at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, or at least about 5% w / w, preferably content in iron is between about 0.5% w / w to about 4% w / w; and / or (b) comprise iron glucoheptonate chelate in which the iron content is between about 10% w / w to about 15% w / w, preferably between about 12% w / w to about 14% w / w. The composition of the invention may comprise glucoheptonic acid or an acceptable salt thereof at an amount of at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, at least about 1.1% w / w, at least about 1.2% w / w, at least about 1.3% w / w, at least about 1.4% w / w or at least 1.5% w / w, preferably at least 1% w / w; optionally wherein the glucoheptonic acid or an acceptable salt thereof is sodium glucoheptonate. The at least one phagostimulant in a composition of the invention may be selected from the group consisting of wheat flour, soy flour, oat flour, rice bran flour, yeast extracts, molasses, fish meal and cornflour. The at least one phagostimulant may be a combination of two or more phagostimulants, preferably a combination of wheat flour and cornflour. The composition of the invention may comprise at least one phagostimulant at an amount of at least 10% w / w, at least 15% w / w, at least 20% w / w or at least 25% w / w, preferably at least 20% w / w. The composition of the invention may further comprise or consist of one or more of: (a) a binder, optionally at an amount of between about 2% w / w to about 10% w / w; (b) a filler, optionally at an amount of between about 5% w / w to about 80% w / w; (c) a viscosity modifier, optionally at an amount of between about 0.01% w / w to about 0.5% w / w; (d) phagostimulant, optionally at an amount of between about 10% w / w to about 30% w / w; (e) a preservative, optionally at an amount of between about 0.01% w / w to about 0.5% w / w; (f) a colorant, optionally at an amount of between about 0.01% w / w to about 0.10% w / w; (g) a lubricant, optionally at an amount of between about 0.5% w / w to about 3% w / w; (h) a glidant, optionally at an amount of between about 0.1% w / w to about 2% w / w; and / or (i) water, optionally at an amount of between about 1% w / w to about 5% w / w. The composition of the invention may comprise: (a) a binder at an amount of between about 2.5% w / w to about 10% w / w, optionally wherein the binder is selected from povidone (PVP), hydroxypropyl methyl cellulose, starch, sucrose, and gelatin; (b) a phagostimulant at an amount of between about 20% w / w to about 30% w / w; and (c) water at an amount of between less than about 5% w / w, preferably less than about 2% w / w. The composition of the invention may be in particulate form, and wherein optionally the average number of granules per gram is between about 130 granules / g to about 200 granules / g, preferably average number of granules per gram is 175 granules / g or less, such as between about 130 granules / g to about 175 granules / g. The composition of the invention may be stable: (a) at 54°C for at least 14 days; and / or (b) at 21 °C for at least 12-months, preferably at least 18-months. The invention also provides a method for producing a composition as defined in any one of claims 1 to 14, said method comprising the steps of: (i) granulating material which forms an inert core; (ii) milling the granulated material; (iii) compressing the milled granulated material to form prills; and (iv) coating the prills with a mixture comprising at least one phagostimulant, iron phosphate and glucoheptonic acid or acceptable salt thereof. The invention further provides a composition obtainable by a method of the invention. The invention also provides a composition of the invention for controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (e.g. slugs and snails). The invention further provides the use of a composition of the invention for repelling and / or controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (e.g., slugs and snails). The invention also provides a method for controlling mollusc damage to plants in horticulture or agriculture, the method comprising contacting a plant, a plant growth medium or a mollusc with a composition of the invention. A composition of the invention may have a molluscicidal activity that is at least 30% greater than a composition without the at least one phagostimulant, iron phosphate and glucoheptonic acid or acceptable salt thereof. The amount of a composition of the invention required to control the population of molluscs or mollusc damage may be 2 times less than the amount of a composition without the at least one phagostimulant, iron phosphate and glucoheptonic acid or acceptable salt thereof that is required to control the same population of molluscs or mollusc damage. The application rate of a composition of the invention, particularly in any method or use of the invention may be between about 2 to about 15 kg per hectare, preferably between about 5 to about 10 kg per hectare. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1: Weight of heart and plant in cabbages grown in the presence of different molluscicide compositions tested in first facility. The present composition of the invention tested shows an increase of the %weight of the cabbage heart compared with control and other molluscicide compositions. Figure 2: Weight of heart and plant in cabbages grown in the presence of different molluscicide compositions tested in second facility. The present composition of the invention tested shows an increase of the %weight of the cabbage heart compared with control. Figure 3: Mollusc damage on cabbages treated with different molluscicide compositions tested in first facility. The present composition of the invention tested shows a remarkable reduction in mollusc damages on the cabbages tested in comparison with the control and other molluscicide compositions. Figure 4: Mollusc damage on cabbages treated with different molluscicide compositions tested in second facility. The present composition of the invention tested shows a remarkable reduction in mollusc damages on the cabbages tested in comparison with the control and other molluscicide compositions. DETAILED DESCRIPTION Definitions Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Singleton, et al., Dictionary of Microbiology and Molecular Biology, 20 Ed., John Wiley and Sons, New York (1994), and Hale &Marham, The Harper Collins Dictionary of Biology, Harper Perennial, NY (1991) provide the skilled person with a general dictionary of many of the terms used in this disclosure. The meaning and scope of the terms should be clear; however, in the event of any latent ambiguity, definitions provided herein take precedence over any dictionary or extrinsic definition. It should be understood that this invention is not limited to the particular methodology, protocols, and reagents, etc., described herein and as such can vary. This disclosure is not limited by the exemplary methods and materials disclosed herein, and any methods and materials similar or equivalent to those described herein can be used in the practice or testing of embodiments of this disclosure. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention, which is defined solely by the claims. The description of embodiments of the disclosure is not intended to be exhaustive or to limit the disclosure to the precise form disclosed. While specific embodiments of, and examples for, the disclosure are described herein for illustrative purposes, various equivalent modifications are possible within the scope of the disclosure, as those skilled in the relevant art will recognize. For example, while method steps or functions are presented in a given order, alternative embodiments may perform functions in a different order, or functions may be performed substantially concurrently. The teachings of the disclosure provided herein can be applied to other procedures or methods as appropriate. The various embodiments described herein can be combined to provide further embodiments. Aspects of the disclosure can be modified, if necessary, to employ the compositions, functions and concepts of the above references and application to provide yet further embodiments of the disclosure. Moreover, due to biological functional equivalency considerations, some changes can be made in protein structure without affecting the biological or chemical action in kind or amount. These and other changes can be made to the disclosure in light of the detailed description. All such modifications are intended to be included within the scope of the appended claims. The headings provided herein are not limitations of the various aspects or embodiments of this disclosure. As used herein, the term "capable of when used with a verb, encompasses or means the action of the corresponding verb. For example, "capable of controlling" also means controlling, "capable of promoting" also means promoting, and "capable of targeting..." also means targets. Numeric ranges are inclusive of the numbers defining the range. Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limits of that range is also specifically disclosed. Each smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in that stated range is encompassed within this disclosure. The upper and lower limits of these smaller ranges may independently be included or excluded in the range, and each range where either, neither or both limits are included in the smaller ranges is also encompassed within this disclosure, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in this disclosure. As used herein, the articles "a" and “an” may refer to one or to more than one (e.g. to at least one) of the grammatical object of the article. Further, unless otherwise required by context, singular terms shall include pluralities and plural terms shall include the singular. In this application, the use of "or" means "and / or" unless stated otherwise. Furthermore, the use of the term "including", as well as other forms, such as "includes" and "included", is not limiting. “About” may generally mean an acceptable degree of error for the quantity measured given the nature or precision of the measurements. Exemplary degrees of error are within 20 percent (%), typically, within 10%, and more typically, within 5% of a given value or range of values. Preferably, the term “about” shall be understood herein as plus or minus (±) 5%, preferably ± 4%, ± 3%, ± 2%, ± 1%, ± 0.5%, ± 0.1%, of the numerical value of the number with which it is being used. The term "consisting of" refers to compositions, methods, and respective components thereof as described herein, which are exclusive of any element not recited in that description of the invention. As used herein the term "consisting essentially of' refers to those elements required for a given invention. The term permits the presence of elements that do not materially affect the basic and novel or functional characteristic(s) of that invention (i.e. inactive or non-immunogenic ingredients). Embodiments described herein as “comprising” one or more features may also be considered as disclosure of the corresponding embodiments “consisting of’ and / or “consisting essentially of” such features. In the context of this document, "and / or" indicates that each of the two specified features or components, either individually or in combination, is explicitly disclosed. For instance, "A and / or B" should be understood as specifically disclosing (i) A, (ii) B, and (iii) A and B, as if each possibility were presented separately within the document. Concentrations, amounts, volumes, percentages and other numerical values may be presented herein in a range format. It is also to be understood that such range format is used merely for convenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. The terms "decrease", "reduced", "reduction", or "inhibit" are all used herein to mean a decrease by a statistically significant amount. The terms "reduce," "reduction" or "decrease" or "inhibit" typically means a decrease by at least 10% as compared to a reference level (e.g. the absence of a given treatment) and can include, for example, a decrease by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, at least about 95%, at least about 98%, at least about 99% , or more. As used herein, "reduction" or "inhibition" encompasses a complete inhibition or reduction as compared to a reference level. "Complete inhibition" or “elimination” is a 100% inhibition (i.e. abrogation) as compared to a reference level. The terms "increased", "increase", "enhance", “ameliorate”, or "activate" are all used herein to mean an increase by a statically significant amount. The terms "increased", "increase", "enhance", “ameliorate”, or "activate" can mean an increase of at least 25%, at least 50% as compared to a reference level, for example an increase of at least about 50%, or at least about 75%, or at least about 80%, or at least about 90%, at least about 95%, or at least about 98%, or at least about 99%, or at least about 100%, or at least about 250% or more compared with a reference level, or at least about a 1.5-fold, or at least about a 2-fold, or at least about a 2.5-fold, or at least about a 3-fold, or at least about a 4-fold, or at least about a 5-fold or at least about a 10-fold increase, or any increase between 1.5-fold and 10-fold or greater as compared to a reference level. In the context of a yield or titre, an "increase" is an observable or statistically significant increase in such level. The term "plants" refers to all physical parts of a plant, including seeds, seedlings, saplings, roots, tubers, stems, stalks, foliage, and fruits. The term "locus" as used herein means any area (e.g. fields) in or on which plants are growing, or where seeds of cultivated plants are sown, orwhere seed will be placed. It includes soil, seeds, and seedlings, as well as established vegetation. The term "plant propagation material" denotes all generative parts of a plant, for example seeds or vegetative parts of plants such as cuttings and tubers. It includes seeds in the strict sense, as well as roots, fruits, tubers, bulbs, rhizomes, and parts of plants. The term "plant growth media" is used to describe any media in which a plant (typically the plant to be protected from pests of the phylum Mollusca) is grown. Preferably, the media consists of or comprises soil. Alternative, soil-free media are also encompassed by the present invention. As used herein, the term “molluscicidally effective amount” refers to an amount which induces mortality, disrupts or impedes growth, interferes functions, effects sterilization, and / or interferes with reproduction of one or more target molluscs. The term “population of molluscs” as used herein may refer to a mixed-species, geographically discreet population of molluscs, or single-species, geographically discreet population of molluscs. As used herein, the terms "controlling a mollusc population" or "controls a mollusc" refers to any effect on a mollusc that results in limiting the damage that the mollusc causes. Controlling a mollusc includes, but is not limited to, killing the mollusc, inhibiting development of the mollusc, altering fertility or growth of the mollusc in such a manner that the mollusc provides less damage to the plant, decreasing the number of offspring produced, producing less fit molluscs, producing molluscs more susceptible to predator attack or deterring the molluscs from eating the plant. “Controlling a population of molluscs” typically means that the number of molluscs within a population of insects is reduced, principally through mortality, at a level that is significantly greater than a population to which the method of the present invention is not performed, or a composition of the invention is not present. The term “agronomically acceptable” as used herein means approved by a regulatory agency of the Federal or a state government, or listed in the U.S. Environmental Protection Agency Register, European Environment Agency Register or other generally recognized register. The term “biological stability” as used herein refers to the maintenance of viability of the composition over time and / or a range of temperatures. By way of non-limiting example, a preparation with increased biological stability may comprise lolines that remain active for a longer period of time compared to a relevant control (e.g. the corresponding lolines in extracted form or a composition comprising such extracted loline(s)). Alternatively, or in addition, a preparation with increased biological stability may comprise endophytes that remain viable for a longer period of time compared to a relevant control. Further alternatively or in addition, a preparation with increased biological stability may comprise lolines that remain active at higher and / or lower temperatures compared to a relevant control (e.g. the corresponding lolines in extracted form or a composition comprising such extracted loline(s)). Further alternatively or in addition, a preparation with increased biological stability may comprise endophytes that remain viable at higher and / or lower temperatures compared to a relevant control. Maintaining viability may be defined in terms of the activity of the one or more loline species. Activity may be determined using any appropriate assay, such as those exemplified herein. By way of non-limiting example, a composition of the invention may be considered viable if the activity of the at least one loline species is at least 50%, at least 60%, at least 70%, at least 80%, at least 90% at least 95%, at least 99% against a suitable control (e.g. the corresponding lolines in extracted form or a composition comprising such extracted loline(s)). Maintaining viability may be defined in terms of the survival of the endophytes. By way of non-limiting example, a composition of the invention may be considered viable if at least 50%, at least 60%, at least 70%, at least 80%, at least 90% at least 95%, at least 99%, or more of the endophytes survive. By way of non-limiting example, a composition of the invention may be considered viable if the germination rate of the endophytes is at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99%, or more. Preferably, a composition of the invention may be considered viable if the germination rate of its endophyte spores is at least 90%, more preferably at least 95%, even more preferably at least 99%. The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that such publications constitute prior art to the claims appended hereto. COMPOSITIONS The present invention provides a molluscicide composition comprising: (a) at least one phagostimulant; (b) iron; and (c) glucoheptonic acid or an acceptable salt thereof. Typically, the iron is provided in the form of iron phosphate. The term “molluscicidal composition” refers to a composition comprising an agent which acts as a pesticide against organisms of the phylum Mollusca. Typically, a composition of the invention acts as an active molluscicide. As used herein, the term active means that the composition actively attracts a mollusc (e.g. using the at least one phagostimulant). Consumption of the composition comprising the iron glucoheptonate chelate may kill the mollusc, inhibit development of the mollusc, alter fertility or growth of the mollusc in such a manner that the mollusc provides less damage to the plant, decrease the number of offspring produced, produce less fit molluscs(i.e. the molluscs have lower levels of fitness), produce molluscs more susceptible to predator attack or deter the molluscs from eating the plant. Preferably, consumption of the composition comprising the iron glucoheptonate chelate will kill the mollusc. A composition of the invention may be a passive molluscicide. As used herein, the term passive means that when the composition is applied to a locus, for example by drilling or placing molluscicidal pellets of the invention into soil (e.g., furrows), the iron glucoheptonate chelate will leach from the composition and be absorbed by the plants (e.g. crops) in the locus. Systemic distribution of the iron glucoheptonate chelate in the plant means that consumption of the plant (e.g. crop) comprising the iron glucoheptonate chelate will be lethal to the mollusc. Preferably, a composition of the invention acts as both an active and passive molluscicide. This dual-action system tackles mollusc populations directly and protects crops in the long term, offering significant benefits for UK farmers, gardeners, and growers. A composition of the invention may be formulated in various ways using formulation adjuvants, such as carriers, solvents and surface-active substances. The formulations can be in various physical forms, e.g. in the form of dusting powders, gels, wettable powders, water-dispersible granules, water-dispersible tablets, effervescent pellets, emulsifiable concentrates, micro-emulsifiable concentrates, oil-in-water emulsions, oil-flowables, aqueous dispersions, oily dispersions, suspo-emulsions, capsule suspensions, emulsifiable granules, soluble liquids, water-soluble concentrates (with water or a water-miscible organic solvent as carrier), impregnated polymer films or in other forms known e.g. from the Manual on Development and Use of FAQ and WHO Specifications for Pesticides, United Nations, First Edition, Second Typically the composition is a solid formulation, as described further herein, preferably a pellet or granule. Advantageously, the compositions of the invention are not toxic to mammals (e.g. humans) and / or bees. Compositions of the invention are therefore safe for widespread use in agricultural and horticultural settings. A composition of the invention may be produced according to the methods described herein. In addition to the at least one phagostimulant, iron (e.g. iron phosphate), and glucoheptonic acid or an acceptable salt thereof; a composition of the invention may comprise one or more additive. Typically said one or more additive may be selected from an active ingredient, an adjuvant, a carrier, a diluent, an emulsifying agent and an inert ingredient. As described herein, the “phagostimulant” means a component that induces sustained feeding and / or a synthetic compound that is added to bait in order to attract molluscs. The term “active ingredient” is intended to mean any substance that is capable of repelling, or otherwise controlling a target pest (e.g., a mollusc). The term “adjuvant” means a chemical that is combined with the composition to improve mixing, application or to enhance molluscicidal activity. The term “carrier” means a substance that aids the effective dispersal of the composition (e.g., talc in a dust formulation). The term “diluent” means anything used to dilute a pesticide. The term “emulsifying agent” is intended to mean any agent which helps to prevent an emulsion from separating. The term “inert ingredient” means any ingredient other than the active ingredient. Inert ingredients may be added to dilute the pesticide or to make it safer, more effective, and easier to measure, mix, apply, and handle. Non-limiting examples of such additives are described herein. Thus, a composition of the invention may further comprise or consist of active ingredient, adjuvant, carrier, diluent, emulsifying agent and / or inert ingredient. The compositions of the present invention typically exhibit good biological stability, as defined herein, and hence have a commercially advantageous shelf-life. A composition of the invention may be biologically stable for at least 6-months at ambient temperature (21 °C). A composition of the invention may be biologically stable for at least 12-months at ambient temperature (21 °C). A composition of the invention may be biologically stable for at least 18-months at ambient temperature (21 °C). A composition of the invention may be biologically stable for at least 24-months at ambient temperature (21 °C). A composition of the invention may be biologically stable for up to 24-months at ambient temperature (21 °C). Alternatively, or in addition, a composition of the invention may be biologically stable for at least 5 days at an elevated temperature (54°C). A composition of the invention may be biologically stable for at least 7 days at an elevated temperature (54°C). A composition of the invention may be biologically stable for at least 10 days at an elevated temperature (54°C). A composition of the invention may be biologically stable for at least 14 days at an elevated temperature (54°C). Without being bound by theory, it is believed that the compositions of the invention retain a low water content (as defined herein) whilst being stored, which is at least partially responsible for their biological stability. For example, a composition of the invention may have a water content of <10% w / w for at least 6-months, at least 12-months, at least 18-months or at least 24-months. By way of further example, a composition of the invention may have a water content of <5% w / w for at least 6-months, at least 12-months, at least 18-months or at least 24-months. By way of further example, a composition of the invention may have a water content of <2% w / w for at least 6-months, at least 12-months, at least 18-months or at least 24-months. Phagostimulants A molluscicide composition of the invention comprises at least one phagostimulant. As described herein said at least one phagostimulant functions as bait to attract a mollusc (e.g. a gastropod such as a slug or snail) to the composition. Suitable phagostimulants are well known to the skilled person, and include cereal grains or flour (e.g., wheat, corn or bran grains, wheat flour, cornflour, grain flour or bakers’ flour), rice, fruit extracts, molasses, sugars (e.g., sucrose, glucose, lactose and / or fructose), yeast extracts, beer, fermented foods, and / or foods with a strong odour. For example, the composition may comprise one or more phagostimulant selected from cereal grains or flour (e.g., wheat, corn or bran grains, wheat flour, corn flour, grain flour or bakers flour), oat (e.g. oat flour), rice (e.g. rice bran flour), soy (e.g. soy flour), fruit extracts, molasses, sugars (e.g., sucrose, glucose, lactose and / or fructose), yeast extracts, beer, fish meal, fermented foods, and / or foods with a strong odour. The composition may comprise at least one phagostimulant selected from cereal grains or flour (e.g., wheat, corn or bran grains, wheat flour, cornflour, grain flour or bakers’ flour). The composition may comprise at least one phagostimulant selected from wheat flour, soy flour, oat flour, rice bran flour, yeast extract, molasses, fish meal and cornflour. A composition of the invention may comprise at least one phagostimulant (e.g. any 1, 2, 3, 4, 5, 6 or more phagostimulants). Any phagostimulant (or combination thereof) may be used in the present invention, provided said phagostimulant (or combination thereof) is palatable to a mollusc such that the composition will be consumed by a mollusc to be controlled and that the composition is molluscicidal. Phagostimulants are known in the art and can be readily identified as such by a skilled person without undue burden. Non-limiting examples of phagostimulants and combinations thereof are described herein. Preferably, a composition of the invention comprises a combination of two or more phagostimulants, such as wheat flour and cornflour. In a composition of the invention, the at least one phagostimulant may be present at an amount of at least about 10% w / w, at least about 15% w / w, at least about 20% w / w or at least about 25% w / w of the composition. In some preferred embodiments, the at least one phagostimulant is present at an amount of at about least 20% w / w of the composition. The at least one phagostimulant may be present in a composition of the invention at an amount from between about 10% w / w to about 50% w / w, such as from between about 10% w / w to about 40% w / w, from between about 10% w / w to about 30% w / w, from between about 15% w / w to about 50% w / w, from between about 15% w / w to about 40% w / w, from between about 15% w / w to about 30% w / w, from between about 20% w / w to about 50% w / w, from between about 20% w / w to about 40% w / w, or from between about 20% w / w to about 30% w / w of the composition. In some preferred embodiments, the at least one phagostimulant is present at an amount of from between about 10% w / w to about 30% w / w of the composition. Iron A composition of the invention comprises iron. The form of iron is not particularly limited, provided that it can chelate with the glucoheptonic acid or salt thereof to form iron glucoheptonate chelate. As exemplified herein, in some preferred embodiments, the iron is iron phosphate. The term iron phosphate includes iron II phosphate (Fea(PO4)2) and iron III phosphate (FePO4) unless expressly stated to the contrary. The iron phosphate may be present in any appropriate anhydrous or hydrate form. In some preferred embodiments, a composition of the invention comprises iron(lll) phosphate di hydrate. The iron content of iron glucoheptonate chelate according to the invention may be between about 0.5% w / w to about 20% w / w of the iron glucoheptonate chelate, such as between about 0.5% w / w to about 15% w / w, between about 0.5% w / w to about 14% w / w, between about 0.5% w / w to about 13.5% w / w, between about 0.5% w / w to about 13% w / w, between about 0.5% w / w to about 12.5% w / w, between about 0.5% w / w to about 12% w / w, between about 1 % w / w to about 20% w / w, between about 1 % w / w to about 15% w / w, between about 1% w / w to about 14% w / w, between about 1% w / w to about 13.5% w / w, between about 1% w / w to about 13% w / w, between about 1% w / w to about 12.5% w / w, between about 1% w / w to about 12% w / w, between about 2% w / w to about 20% w / w, between about 2% w / w to about 15% w / w, between about 2% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 2% w / w to about 13% w / w, between about 2% w / w to about 12.5% w / w, between about 2% w / w to about 12% w / w, between about 5% w / w to about 20% w / w, between about 5% w / w to about 15% w / w, between about 5% w / w to about 14% w / w, between about 5% w / w to about 13.5% w / w, between about 5% w / w to about 13% w / w, between about 5% w / w to about 12.5% w / w, between about 5% w / w to about 12% w / w, between about 7.5% w / w to about 20% w / w, between about 7.5% w / w to about 15% w / w, between about 7.5% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 7.5% w / w to about 13% w / w, between about 7.5% w / w to about 12.5% w / w, between about 7.5% w / w to about 12% w / w, between about 10% w / w to about 20% w / w, between about 10% w / w to about 15% w / w, between about 10% w / w to about 14% w / w, between about 10% w / w to about 13.5% w / w, between about 10% w / w to about 13% w / w, between about 10% w / w to about 12.5% w / w or between about 10% w / w to about 12% w / w of the iron glucoheptonate chelate. The iron content of iron glucoheptonate chelate according to the invention may be at least about 7.5% w / w, at least about 10% w / w, at least about 11% w / w, at least about 12% w / w, at least about 12.5% w / w, at least about 13% w / w, at least about 13.5% w / w, at least about 14% w / w, at least about 14.5% w / w, at least about 15% w / w, or at least about 17.5% w / w, preferably the iron content of the iron glucoheptonate chelate is between about 10% w / w to about 15% w / w, such as between about 12% w / w to about 14% w / w. The iron content of a composition of the invention may be between about 0.5% w / w to about 20% w / w of the composition, such as between about 0.5% w / w to about 15% w / w, between about 0.5% w / w to about 14% w / w, between about 0.5% w / w to about 13.5% w / w, between about 0.5% w / w to about 13% w / w, between about 0.5% w / w to about 12.5% w / w, between about 0.5% w / w to about 12% w / w, between about 1% w / w to about 20% w / w, between about 1 % w / w to about 15% w / w, between about 1 % w / w to about 14% w / w, between about 1% w / w to about 13.5% w / w, between about 1% w / w to about 13% w / w, between about 1% w / w to about 12.5% w / w, between about 1% w / w to about 12% w / w, between about 2% w / w to about 20% w / w, between about 2% w / w to about 15% w / w, between about 2% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 2% w / w to about 13% w / w, between about 2% w / w to about 12.5% w / w, between about 2% w / w to about 12% w / w, between about 5% w / w to about 20% w / w, between about 5% w / w to about 15% w / w, between about 5% w / w to about 14% w / w, between about 5% w / w to about 13% w / w, between about 5% w / w to about 12% w / w, between about 5% w / w to about 13.5% w / w, between about 5% w / w to about 12.5% w / w, between about 7.5% w / w to about 20% w / w, between about 7.5% w / w to about 15% w / w, between about 7.5% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 7.5% w / w to about 13% w / w, between about 7.5% w / w to about 12.5% w / w, between about 7.5% w / w to about 12% w / w, between about 10% w / w to about 20% w / w, between about 10% w / w to about 15% w / w, between about 10% w / w to about 14% w / w, between about 10% w / w to about 13.5% w / w, between about 10% w / w to about 13% w / w, between about 10% w / w to about 12.5% w / w or between about 10% w / w to about 12% w / w of the composition. The iron content of a composition of the invention may be at least about 7.5% w / w, at least about 10% w / w, at least about 11% w / w, at least about 12% w / w, at least about 12.5% w / w, at least about 13% w / w, at least about 13.5% w / w, at least about 14% w / w, at least about 14.5% w / w, at least about 15% w / w, or at least about 17.5% w / w, preferably the iron content of the composition is between about 10% w / w to about 15% w / w, such as between about 12% w / w to about 14% w / w. In some embodiments, the iron content of a composition of the invention may be between about 0.5% w / w to about 5% w / w of the composition, such as between about 0.5% w / w to about 4.5% w / w, between about 0.5% w / w to about 4% w / w, between about 0.5% w / w to about 3% w / w, between about 0.5% w / w to about 2.5% w / w, between about 1% w / w to about 5% w / w, between about 1% w / w to about 4.5% w / w, between about 1% w / w to about 4% w / w, between about 1% w / w to about 3% w / w, between about 1% w / w to about 2.5% w / w, between about 2% w / w to about 5% w / w, between about 2% w / w to about 4.5% w / w, between about 2% w / w to about 4% w / w, between about 2% w / w to about 3% w / w, or between about 2% w / w to about 2.5% w / w of the composition. The iron content of a composition of the invention may be at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, or at least about 5% w / w, preferably content in iron is between about 0.5% w / w to about 4% w / w. The iron content of a composition of the invention may be at least about 8.0 g / kg, such as at least about 8.50 g / kg, at least about 8.55 g / kg, at least about 8.60 g / kg, at least about 8.61 g / kg, at least about 8.62 g / kg, at least about 8.63 g / kg, at least about 8.64 g / kg, at least about 8.65 g / kg, at least about 8.70 g / kg, at least about 8.71 g / kg, at least about 8.72 g / kg, at least about 8.73 g / kg, at least about 8.74 g / kg, at least about 8.75 g / kg, at least about 8.8 g / kg, at least about 8.9 g / kg, at least about 9.0 g / kg, at least about 9.5 g / kg, at least about 10.0 g / kg, at least about 11.0 g / kg or more. As described herein, it is the iron glucoheptonate chelate which is the active molluscicidal agent within a composition of the invention. Accordingly, a composition of the invention may comprise iron glucoheptonate chelate at a concentration of at least about 50 g / kg, such as at least about 51 g / kg, at least about 52 g / kg, at least about 53 g / kg, at least about 54 g / kg, at least about 55 g / kg, at least about 56 g / kg, at least about 57 g / kg, at least about 58 g / kg, at least about 59 g / kg, at least about 60 g / kg, at least about 61 g / kg, at least about 62 g / kg, at least about 63 g / kg, at least about 64 g / kg, at least about 65 g / kg, at least about 66 g / kg, at least about 67g / kg, at least about 68 g / kg, at least about 69 g / kg, at least about 70 g / kg, at least about 72g / kgs at least about 75 g / kg, at least about 80 g / kgs at least about 85 g / kg or more. The iron glucoheptonate chelate content of a composition of the invention may be between about 0.5% w / w to about 20% w / w of the composition, such as between about 0.5% w / w to about 15% w / w, between about 0.5% w / w to about 14% w / w, between about 0.5% w / w to about 13.5% w / w, between about 0.5% w / w to about 13% w / w, between about 0.5% w / w to about 12.5% w / w, between about 0.5% w / w to about 12% w / w, between about 1% w / w to about 20% w / w, between about 1 % w / w to about 15% w / w, between about 1 % w / w to about 14% w / w, between about 1% w / w to about 13.5% w / w, between about 1% w / w to about 13% w / w, between about 1% w / w to about 12.5% w / w, between about 1% w / w to about 12% w / w, between about 2% w / w to about 20% w / w, between about 2% w / w to about 15% w / w, between about 2% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 2% w / w to about 13% w / w, between about 2% w / w to about 12.5% w / w, between about 2% w / w to about 12% w / w, between about 5% w / w to about 20% w / w, between about 5% w / w to about 15% w / w, between about 5% w / w to about 14% w / w, between about 5% w / w to about 13.5% w / w, between about 5% w / w to about 13% w / w, between about 5% w / w to about 12.5% w / w, between about 5% w / w to about 12% w / w, between about 7.5% w / w to about 20% w / w, between about 7.5% w / w to about 15% w / w, between about 7.5% w / w to about 14% w / w, between about 2% w / w to about 13.5% w / w, between about 7.5% w / w to about 13% w / w, between about 7.5% w / w to about 12.5% w / w, between about 7.5% w / w to about 12% w / w, between about 10% w / w to about 20% w / w, between about 10% w / w to about 15% w / w, between about 10% w / w to about 14% w / w, between about 10% w / w to about 13.5% w / w, between about 10% w / w to about 13% w / w, between about 10% w / w to about 12.5% w / w or between about 10% w / w to about 12% w / w of the composition. In some embodiments, the iron glucoheptonate chelate content of a composition of the invention may be between about 0.5% w / w to about 10% w / w of the composition, such as between about 1 % w / w to about 9% w / w, between about 2% w / w to about 8% w / w, between about 3% w / w to about 8% w / w, between about 3% w / w to about 7.5% w / w, between about 3% w / w to about 7% w / w, between about 4% w / w to about 7.5% w / w, between about 4% w / w to about 7% w / w, between about 5% w / w to about 7.5% w / w, between about 5% w / w to about 7% w / w, between about 5.5% w / w to about 7.5% w / w, between about 5.5% w / w to about 7% w / w, between about 6% w / w to about 7.5% w / w, or between about 6% w / w to about 7% w / w of the composition. The iron glucoheptonate chelate content of a composition of the invention may be at least about 5.0% w / w, at least about 5.25% w / w, at least about 5.30 w / w, at least about 5.40% w / w, at least about 5.50% w / w, at least about 6.0% w / w, at least about 6.10% w / w, at least about 6.20% w / w, at least about 6.30% w / w, preferably content in iron is between about 5.0% w / w to about 7.0% w / w. Glucoheptonic acid A composition of the invention comprises glucoheptonic acid or an acceptable salt thereof. Unless expressly stated to the contrary any reference herein to glucoheptonic acid also encompasses salts of glucoheptonic acid. Glucoheptonic acid (PubChem CID 25588) has the structure: The nature of the glucoheptonic acid salt is not particularly limited, provided that the glucoheptonic acid retains the ability to chelate iron to produce iron glucoheptonate chelate. Non-limiting examples of glucoheptonic acid salts include sodium salts, potassium salts and calcium salts. In some preferred embodiments, the glucoheptonic acid salt is a sodium salt of glucoheptonic acid, more preferably a-D-Glucoheptonic acid sodium salt (CAS No. 10094-62-9, PubChem CID 24895128). A composition of the invention comprises glucoheptonic acid or an acceptable salt thereof at an amount of at least about 0.1 % w / w, at least about 0.2% w / w, at least about 0.3% w / w, at least about 0.4% w / w, at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, at least about 1.1% w / w, at least about 1.2% w / w, at least about 1.3% w / w, at least about 1.4% w / w or at least about 1.5% w / w, preferably at least about 0.1 % w / w or at least about 0.5% w / w. A composition of the invention comprises glucoheptonic acid or an acceptable salt thereof at an amount of between about 0.1% w / w to about 5% w / w of the composition, such as between about 0.1% w / w to about 4% w / w, between about 0.1% w / w to about 3% w / w, between about 0.1% w / w to about 2.5% w / w, between about 0.1% w / w to about 2% w / w, between about 0.1% w / w to about 1.5% w / w, between about 0.1% w / w to about 1% w / w, between about 0.1% w / w to about 0.5% w / w, about 0.2% w / w to about 5% w / w, between about 0.2% w / w to about 4% w / w, between about 0.2% w / w to about 3% w / w, between about 0.2% w / w to about 2.5% w / w, between about 0.2% w / w to about 2% w / w, between about 0.2% w / w to about 1.5% w / w, between about 0.2% w / w to about 1% w / w, between about 0.2% w / w to about 0.5% w / w, about 0.3% w / w to about 5% w / w, between about 0.3% w / w to about 4% w / w, between about 0.3% w / w to about 3% w / w, between about 0.3% w / w to about 2.5% w / w, between about 0.3% w / w to about 2% w / w, between about 0.3% w / w to about 1.5% w / w, between about 0.3% w / w to about 1% w / w, or between about 0.3% w / w to about 0.5% w / w of the composition. Preferably, the glucoheptonic acid or acceptable salt thereof may be sodium glucoheptonate. Cores A composition of the invention may further comprise or consist of a core. The use of a core may be advantageous of any of several reasons. Without being bound by theory, the use of a core may allow the at least one phagostimulant and the iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof to be evenly coated on the surface of the composition (bait), allowing lower amounts of phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof to be used to achieve the same molluscicidal effect. Again, without being bound by theory, the use of a core may improve the ballistic properties of the composition and / or dispensing of the composition, allowing it to be handled and used more easily. Further, without being bound by theory, the core itself and / or the use of binders to coat the core can be beneficial in maintaining the physical integrity of the composition, retarding leaching of the iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof, or the resulting iron glucoheptonate chelate, from the composition. Further, without being bound by theory, the core itself and / or the use of binders to coat the core can themselves have phagostimulant activity, attracting the mollusc pests to be controlled. Typically, the core is an inert core. The term “inert” means a material that does not have molluscicidal activity. An “inert material” means any material other than the active material. Inert materials may impart properties to the composition, e.g. making it safer, more effective, and easier to measure, mix, apply, and / or handle. When a composition of the invention comprises a core, said core may be coated with the composition of the invention. Thus, the invention provides a composition comprising an (inert) core, wherein the (inert) core is coated with a mixture of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof. Coating of the core with a mixture of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof may be carried out by any appropriate method, suitable examples of which are known in the art. By way of non-limiting example, the core granules may be compressed into a prill and then coated with a mixture of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof. By way of further non-limiting example, the core may be already in a prill form, for example dolomite cores may be produced from quarried rock, which may then be directly coated with a mixture of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof. The thickness of the coating of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof on an inert core is not particularly limited, provided that a sufficient amount of the at least one phagostimulant is present to attract and stimulate consumption of the composition by a mollusc, and that a sufficient amount of iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof is present to form an iron glucoheptonate chelate with molluscicidal activity. . By way of non-limiting example, the thickness of the coating may be of at least about 0.1 mm, at least about 0.5 mm, at least about 1 mm, at least about 1.5 mm or at least about 2 mm. The thickness of the coating may alternatively be of less than about 2 mm, less than about 1.5 mm, less than about 1 mm or less than about 0.5 mm. The thickness of the coating may alternatively be comprised between about 0.1 mm and about 2 mm, between about 0.1 mm and about 1.5 mm, between about 0.1 mm and about 1 mm, between about 0.1 mm and about 0.5 mm, between about 0.5 mm and about 2 mm, between about 0.5 mm and about 1.5 mm, or between about 0.5 mm and about 1 mm. The material of the inert core is not particularly limited, provided that the core is inert. Thus, the inert core may comprise or consist of or consists of an inorganic material and / or an organic material. Non-limiting examples of inorganic materials include dolomite, lime, reactive and / or rock phosphate, gypsum, bentonite, kaolin, talc, attapulgite and diatomaceous clay. In some preferred embodiments, the inorganic material is dolomite. Suitable organic materials include that are the waste-product or by-product of an agricultural process. By way of nonlimiting example, suitable organic materials include frass, worm castings, bat guano, chicken manure, seaweed or kelp meal. In some preferred embodiments, the organic material is frass, with black solider fly larvae frass being particularly preferred. The inert core may be made of a non-porous material. Without being bound by theory, such cores may be advantageous as they are less prone to swelling and / or deformity when contacted with water (e.g. in the rain) compare with cores made from porous materials. Alternatively, or in addition, such non-porous cores may be less susceptible to mould or spoilage. Further alternatively or in addition, such non-porous cores may be advantageous as reduced water content may maintain and / or improve the activity of the iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof (or the resulting iron glucoheptonate chelate). The size of the (inert) core is not particularly limited. The size of the (inert) core may be selected using any appropriate technique, examples of which are known in the art. Standard granulation may be used to grind the core material to granules of the desired size, so that each individual core (i.e. each granule) is of the desired size. The (inert) core of the invention may have an average diameter of <2.4mm, such as <2.3mm, <2.2mm, <2.1mms <2.0mms <1.9mms <1.8mms <1.7mms <1.6mms <1.5mms <1.4mms <1.3mms <1.2mms or <1.1 mm. The (inert) core of the invention may have an average diameter of between about 1.1mm to about 2.4mm, such as between about 1.1mm to about 2.3mm, between about 1.1mm to about 2.2mm, between about 1.1mm to about 2.1mm, between about 1.1mm to about 2.0mm, between about 1,2mm to about 2.4mm, between about 1,2mm to about 2.3mm, between about 1.2mm to about 2.2mm, between about 1.2mm to about 2.1mm, between about 1.2mm to about 2.0mm, between about 1.3mm to about 2.4mm, between about 1.3mm to about 2.3mm, between about 1.3mm to about 2.2mm, between about 1.3mm to about 2.1mm, between about 1,3mm to about 2.0mm, between about 1,4mm to about 2.4mm, between about 1.4mm to about 2.3mm, between about 1.4mm to about 2.2mm, between about 1.4mm to about 2.1 mm, or between about 1,4mm to about 2.0mm. Any appropriate means may be used to quantify the size of the core. For example, sieve analysis may be used to determine the average diameter of cores retained. By way of example, using a sieve with a 2.4mm mesh, the %w / w of cores retained may be 0% w / w (i.e. all cores are <2.4mm in diameter). By way of further example, using a sieve with a 2.0mm mesh, the %w / w of cores retained may be approximately 2-5% w / w (i.e. 2-5% w / w of the cores are <2.0mm in diameter). By way of further example, using a sieve with a 1.7mm mesh, the %w / w of cores retained may be approximately 20-30% w / w (i.e. 20-30% w / w of the cores are <1,7mm in diameter). By way of further example, using a sieve with a 1.4mm mesh, the %w / w of cores retained may be approximately 60-70% w / w (i.e. 60-70% w / w of the cores are <1.4m in diameter). By way of further example, using a sieve with a 1.18mm mesh, the %w / w of cores retained may be approximately 98% w / w (i.e. approximately 98% w / w of the cores are <1.18mm in diameter). The (inert) core may be of any of any shape, e.g. spherical or cylindrical. An (inert) core of the invention may comprise one or more additive, as described herein in the context of the compositions of the invention. Thus, in a composition of the invention one or more additive may be present within a core, and / or within the mixture coated onto a core (the coating) The one or more additive present in the core and / or within the coating may be selected independently. For the avoidance of doubt, disclosure herein relating to additives (including the type of additive and / or the amount thereof) applies equally and without reservation to additives within the core or the coating. Where amounts of additives are given, these may be the amount within the core, the amount within the coating, or the total amount present in a composition (core and coating combined). By way of non-limiting example, an inert core comprising an organic material may comprise or consist of: (i) one or more binder (e.g. Povidone (PVP), Hydroxypropylmethyl cellulose, starch, sucrose or gelatine), optionally at an amount of between about 2.5% w / w to about 5% w / w; (ii) a filler optionally at an amount of between about 20% w / w to about 30% w / w and (iii) one or more phagostimulant (e.g. frass, worm castings, bat guano, chicken manure, seaweed, kelp meal or lactose, preferably frass, more preferably black solider fly larvae frass), optionally at an amount of between about 20% w / w to about 30% w / w. Said core may have a water content of <5% w / w, preferably <2% w / w. Additives The one or more additive may comprise one or more additive, as described herein. Typically said one or more additive may be selected from an active ingredient, an adjuvant, a carrier, a diluent, an emulsifying agent, a binder, a filler, a viscosity modifier, a preservative, a colorant, a lubricant and a glidant. Thus, a composition may comprise a further active agent, wherein the active agent is a further pesticide. Suitable known pesticides include those disclosed in the Pesticide Manual (The Pesticide Manual - A World Compendium; Seventeenth edition; Editor: C. D. S. Tomlin; The British Crop Protection Council). For example, the composition may comprise a further active agent selected from an acaricide, bactericide, fungicide, herbicide, insecticide, miticide, molluscicide, or a nematicide. When present, the further pesticide may be a second molluscicide. Preferably, the iron glucoheptonate chelate in the composition is the only molluscicidal agent present. Further preferably, a composition of the invention does not comprise an additional pesticide. A composition of the invention may further comprise or consist of at least one crop enhancing additive. According to the present invention, ‘crop enhancement’ or ‘enhancing crops’ means an improvement in plant vigour, an improvement in plant quality, improved tolerance to stress factors and / or improved input use efficiency. According to the present invention, an ‘improvement in plant vigour’ means that certain traits are improved qualitatively or quantitatively when compared with the same trait in a control plant which has been grown under the same conditions in the absence of a composition of the invention. Such traits include, but are not limited to, early and / or improved germination, improved emergence, the ability to use less seeds, increased root growth, a more developed root system, increased root nodulation, increased shoot growth, increased tillering, stronger tillers, more productive tillers, increased or improved plant stand, less plant verse (lodging), an increase and / or improvement in plant height, an increase in plant weight (fresh or dry), bigger leaf blades, greener leaf colour, increased pigment content, increased photosynthetic activity, earlier flowering, longer panicles, early grain maturity, increased seed, fruit or pod size, increased pod or ear number, increased seed number per pod or ear, increased seed mass, enhanced seed filling, less dead basal leaves, delay of senescence, improved vitality of the plant, increased levels of amino acids in storage tissues and / or less inputs needed (e.g. less fertiliser, water and / or labour needed). A plant with improved vigour may have an increase in any of the aforementioned traits or any combination or two or more of the aforementioned traits. According to the present invention, an ‘improvement in plant quality’ means that certain traits are improved qualitatively or quantitatively when compared with the same trait in a control plant which has been grown under the same conditions in the absence of a composition of the invention. Such traits include, but are not limited to, improved visual appearance of the plant, reduced ethylene (reduced production and / or inhibition of reception), improved quality of harvested material, e.g. seeds, fruits, leaves, vegetables (such improved quality may manifest as improved visual appearance of the harvested material), improved carbohydrate content (e.g. increased quantities of sugar and / or starch, improved sugar acid ratio, reduction of reducing sugars, increased rate of development of sugar), improved protein content, improved oil content and composition, improved nutritional value, reduction in anti-nutritional compounds, improved organoleptic properties (e.g. improved taste) and / or improved consumer health benefits (e.g. increased levels of vitamins and anti-oxidants)), improved postharvest characteristics (e.g. enhanced shelf-life and / or storage stability, easier processability, easier extraction of compounds), more homogenous crop development (e.g. synchronised germination, flowering and / or fruiting of plants), and / or improved seed quality (e.g. for use in following seasons). A plant with improved quality may have an increase in any of the aforementioned traits or any combination or two or more of the aforementioned traits. According to the present invention, an ‘improved tolerance to stress factors’ means that certain traits are improved qualitatively or quantitatively when compared with the same trait in a control plant which has been grown under the same conditions in the absence of a composition of the invention. Such traits include, but are not limited to, an increased tolerance and / or resistance to abiotic stress factors which cause sub-optimal growing conditions such as drought (e.g. any stress which leads to a lack of water content in plants, a lack of water uptake potential or a reduction in the water supply to plants), cold exposure, heat exposure, osmotic stress, UV stress, flooding, increased salinity (e.g. in the soil), increased mineral exposure, ozone exposure, high light exposure and / or limited availability of nutrients (e.g. nitrogen and / or phosphorus nutrients). A plant with improved tolerance to stress factors may have an increase in any of the aforementioned traits or any combination or two or more of the aforementioned traits. In the case of drought and nutrient stress, such improved tolerances may be due to, for example, more efficient uptake, use or retention of water and nutrients. According to the present invention, an ‘improved input use efficiency’ means that the plants are able to grow more effectively using given levels of inputs compared to the growth of control plants which are grown under the same conditions in the absence of a composition of the invention. In particular, the inputs include, but are not limited to fertiliser (such as nitrogen, phosphorous, potassium, micronutrients), light and water. A plant with improved input use efficiency may have an improved use of any of the aforementioned inputs or any combination of two or more of the aforementioned inputs. Other crop enhancements of the present invention include a decrease in plant height, or reduction in tillering, which are beneficial features in crops or conditions where it is desirable to have less biomass and fewer tillers. Any of or all the above crop enhancements may lead to an improved yield by improving, for example, plant physiology, plant growth and development and / or plant architecture. In the context of the present invention ‘yield’ includes, but is not limited to, (i) an increase in biomass production, grain yield, starch content, oil content and / or protein content, which may result from (a) an increase in the amount produced by the plant per se or (b) an improved ability to harvest plant matter, (ii) an improvement in the composition of the harvested material (e.g. improved sugar acid ratios, improved oil composition, increased nutritional value, reduction of anti-nutritional compounds, increased consumer health benefits) and / or (iii) an increased / facilitated ability to harvest the crop, improved processability of the crop and / or better storage stability / shelf life. Increased yield of an agricultural plant means that, where it is possible to take a quantitative measurement, the yield of a product of the respective plant is increased by a measurable amount over the yield of the same product of the plant produced under the same conditions, but without application of the present invention. According to the present invention, it is preferred that the yield be increased by at least 0.5%, preferably 1%, 2%, 3% or more. Even more preferred is an increase in yield of at least about 5%, 10%, 15% or 20% or more. Any, or all, of the above crop enhancements may also lead to an improved utilisation of land, that is land which was previously unavailable or sub-optimal for cultivation may become available. For example, plants which show an increased ability to survive in drought conditions, may be able to be cultivated in areas of sub-optimal rainfall, for example on the fringe of a desert or even the desert itself. By way of non-limiting example, a composition may comprise one or more additive that is a plant growth regulator such as 1-methylcyclopropene, 1-naphthol, 2,3,5-tri-iodobenzoic acid, 2,3-dihydro-5,6-diphenyl-1,4-oxath(ll)ne, 2,4,5-T, 2,4-D, 2,4-DB, 2,4-DEP, 24-epi-brassinolide, 28-homobrassinolide, 2-cyano-3-(2,4-dichlorophenyl)acrylic acid, 2-hydrazinoethanol, 2iP, 4-CPA, 4-hydroxyphenethyl alcohol, abscisic acid, AC 94377, ACC, ancymidol, auxins, aviglycine, bachmedesh, benzofluor, benzyladenine, 24-epi-brassinolide, 28-homo-brassinolide, brassinolide, brassinolide-ethyl, brassinosteroids, BTS 44584, buminafos, butralin, calcium cyanamide, carbaryl, carvone, chlorfluren, chlorflurenol, chlormequat-chloride, chlorphonium, chlorpropham, choline chloride, ciobutide, clofencet, clofibric acid, cloprop, cloxyfonac, cyanamide, cyclanilide, cycloheximide, cyprosulfamide, cytokinins, daminozide, DCPTA, deoxystrigol, dicamba-methyl, dichlorflurenol, dichlorflurenol-methyl, dichlorprop, dikegulac, dimexano, endothal, epocholeone, etacelasil, ethephon, ethychlozate, ethylene, fenoprop, fenridazon, flumetralin, fluoridamid, flurenol, flurprimidol, forchlorfenuron, fosamine, fuphenthiourea, furalane, gibberellic acid, gibberellins, glyoxime, glyphosine, GR-24, heptopargil, hexafluoroacetone trihydrate, holosulf, hymexazol, IAA, IBA, Inabenfide, INCYDE, isoprothiolane, isopyrimol, jasmonates, jasmonic acid, karetazan, karrikins, kinetin, lead arsenate, maleic hydrazide, MCPB, mefluidide, mepiquat, merphos, methasulfocarb, metoxuron, N-(2-ethyl-2H-pyrazol-3-yl)-N'-phenylurea, N-m-tolylphthalamic acid, Npyrrolidinosuccinamic acid, naphthaleneacetamide, naphthoxyacetic acids, n-decanol, nonanoic acid, N-phenylphthalamic acid, orobanchol, paclobutrazol, pentachlorophenol, piproctanyl, potassium naphthenate, polyamines, prohexadione-calcium, prohydrojasmon, propham, propyl 3-tert -butylphenoxyacetate, prosuler, pydanon, pyripropanol, salicylic acid, sintofen, sodium (Z)-3-chloroacrylate, sodium naphthenate, sorgolactone, strigol, strigolactones, tecnazene, tetcyclacis, thidiazuron, tiaojiean, triacontanol, triapenthenol, tribufos, trinexapac, trinexapac-ethyl, uniconazole, zeatin, and a-naphthaleneacetic acid. Alternatively, or in addition, by way of a further non-limiting example, a composition may comprise one or more additive that enhances plant tolerance to abiotic stress. Exemplary additives may include biostimulant products that contain one or more micronutrients, macronutrients, plant hormones, or amino acids. Examples of biostimulant products include seaweed extracts, Quantis ™, Isa bi on™, Vitazyme ™, Megafol™, Releaseed™, Biozyme™, TerraSorb™, Aminocore™, Radical™, Proplex™, Bioforge ™, Terrabiogen™, Folicist™, Cytozyme™, Cytoplant™, and Greenstim™. Further alternatively or in addition, a composition may also include, or be applied in conjunction with, one or more beneficial organisms. A composition of the invention may also comprise one or more carrier. Suitable carriers may be either solid or liquid carriers. Solid carriers may be referred to as fillers. Suitable solid carriers (fillers) may be selected from: calcium carbonate, magnesium carbonate, talc, titanium dioxide, pyrophyllite clay, silica, attapulgite clay, kieselguhr, limestone, calcium carbonate, bentonite, calcium montmorillonite, cottonseed husks, wheat flour, bakers’ flour, cornflour soybean flour, pumice, wood flour, ground walnut shells, and lignin. Liquid carriers may be selected from mineral oils, oils of vegetable or animal origin, modified oils of vegetable or animal origin, organic solvents, water, surface-active substances or combinations thereof, for example: water, toluene, xylene, petroleum ether, vegetable oils, acetone, methyl ethyl ketone, cyclohexanone, acid anhydrides, acetonitrile, acetophenone, amyl acetate, 2-butanone, butylene carbonate, chlorobenzene, cyclohexane, cyclohexanol, alkyl esters of acetic acid, diacetone alcohol, 1,2-dichloropropane, diethanolamine, p-diethylbenzene, diethylene glycol, diethylene glycol abietate, diethylene glycol butyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ether, N,N-dimethylformamide, dimethyl sulfoxide, 1 ,4-dioxane, dipropylene glycol, dipropylene glycol methyl ether, dipropylene glycol dibenzoate, diproxitol, alkylpyrrolidone, ethyl acetate, 2-ethylhexanol, ethylene carbonate, 1,1,1-trichloroethane, 2- heptanone, alpha-pinene, d-limonene, ethyl lactate, ethylene glycol, ethylene glycol butyl ether, ethylene glycol methyl ether, gamma-butyrolactone, glycerol, glycerol acetate, glycerol diacetate, glycerol triacetate, hexadecane, hexylene glycol, isoamyl acetate, isobornyl acetate, isooctane, isophorone, isopropylbenzene, isopropyl myristate, lactic acid, laurylamine, mesityl oxide, methoxypropanol, methyl isoamyl ketone, methyl isobutyl ketone, methyl laurate, methyl octanoate, methyl oleate, methylene chloride, m-xylene, n-hexane, n- octylamine, octadecanoic acid, octylamine acetate, oleic acid, oleylamine, o-xylene, phenol, polyethylene glycol, propionic acid, propyl lactate, propylene carbonate, propylene glycol, propylene glycol methyl ether, p-xylene, toluene, triethyl phosphate, triethylene glycol, xylenesulfonic acid, paraffin, mineral oil, trichloroethylene, perchloroethylene, ethyl acetate, amyl acetate, butyl acetate, propylene glycol methyl ether, diethylene glycol methyl ether, methanol, ethanol, isopropanol, and alcohols of higher molecular weight, such as amyl alcohol, tetrahydro-furfuryl alcohol, hexanol, octanol, ethylene glycol, propylene glycol, glycerol, N-methyl-2-pyrrolidone and the like. A composition of the invention may comprise a carrier, particularly a solid carrier (filler), at an amount of between about 5% w / w to about 80% w / w of the composition, such as between about 5% w / w to about 75% w / w, between about 5% w / w to about 70% w / w, between about 5% w / w to about 60% w / w, between about 5% w / w to about 50% w / w, between about 5% w / w to about 40% w / w, between about 5% w / w to about 30% w / w, between about 5% w / w to about 25% w / w of the composition, between about 5% w / w to about 20% w / w, between about 5% w / w to about 10% w / w, 10% w / w to about 80% w / w of the composition, between about 10% w / w to about 75% w / w, between about 10% w / w to about 70% w / w, between about 10% w / w to about 60% w / w, between about 10% w / w to about 50% w / w, between about 10% w / w to about 40% w / w, between about 10% w / w to about 30% w / w, between about 10% w / w to about 25% w / w of the composition, between about 10% w / w to about 20% w / w, between about 20% w / w to about 80% w / w of the composition, between about 20% w / w to about 75% w / w, between about 20% w / w to about 70% w / w, between about 20% w / w to about 60% w / w, between about 20% w / w to about 50% w / w, between about 20% w / w to about 40% w / w, between about 20% w / w to about 30% w / w, between about 30% w / w to about 80% w / w of the composition, between about 30% w / w to about 75% w / w, between about 30% w / w to about 70% w / w, between about 30% w / w to about 60% w / w, between about 30% w / w to about 50% w / w, between about 30% w / w to about 40% w / w, between about 40% w / w to about 80% w / w of the composition, between about 40% w / w to about 75% w / w, between about 40% w / w to about 70% w / w, between about 40% w / w to about 60% w / w, between about 40% w / w to about 50% w / w, between about 50% w / w to about 80% w / w of the composition, between about 50% w / w to about 75% w / w, between about 50% w / w to about 70% w / w, or between about 50% w / w to about 60% w / w of the composition. Alternatively, or in addition, a composition of the invention may also comprise one or more binder. A binder (also referred to as a binding agent) delays or retards disintegration of a composition. Non-limiting examples of suitable binders include starch (e.g. maize starch), pregelatinized starch, sodium alginate, gelatin, Polyvinyl Pyrrolidone (PVP), Methylcellulose, Hydroxy Propyl Methyl Cellulose (HPMC), Polymethacrylates, Sodium Carboxy Methyl Cellulose, Polyethylene Glycol (PEG), Methylcellulose, and disaccharides (e.g. lactose and sucrose). In some preferred embodiments, a composition comprises starch, particularly maize starch as a binder. A composition of the invention may comprise a binder at an amount of between about 2% w / w to about 10% w / w of the composition, such as between about 2% w / w to about 9% w / w, between about 2% w / w to about 8% w / w, between about 2% w / w to about 7% w / w, between about 2% w / w to about 6% w / w, between about 2% w / w to about 5% w / w, between about 2% w / w to about 4% w / w, between about 3% w / w to about 10% w / w of the composition, between about 3% w / w to about 9% w / w, between about 3% w / w to about 8% w / w, between about 3% w / w to about 7% w / w, between about 3% w / w to about 6% w / w, between about 3% w / w to about 5% w / w, between about 4% w / w to about 10% w / w of the composition, between about 4% w / w to about 9% w / w, between about 4% w / w to about 8% w / w, between about 4% w / w to about 7% w / w, between about 4% w / w to about 6% w / w, between about 5% w / w to about 10% w / w of the composition, between about 5% w / w to about 9% w / w, between about 5% w / w to about 8% w / w, or between about 5% w / w to about 7% w / w of the composition. Further alternatively or in addition, a composition of the invention may also comprise one or more viscosity modifier. A viscosity modifier changes the thickness or texture of a formulation. Non-limiting examples of suitable viscosity modifiers include hydroxyethylecellulose, polymethacrylates (PMAs); poly(ethylene propylene), also known as “olefin copolymers” (OCPs); hydrogenated poly(styrene-co-butadiene or isoprene); and polyisobutenes (Polyisobutylenes). In some preferred embodiments, a composition comprises hydroxyethylecellulose as a viscosity modifier. A composition of the invention may comprise a viscosity modifier at an amount of between about 0.01% w / w to about 0.5% w / w of the composition, such as between about 0.01% w / w to about 0.4% w / w, between about 0.01% w / w to about 0.3% w / w, between about 0.01% w / w to about 0.2% w / w, between about 0.01% w / w to about 0.1% w / w, between about 0.01% w / w to about 0.05% w / w, between about 0.02% w / w to about 0.5% w / w, between about 0.02% w / w to about 0.4% w / w, between about 0.02% w / w to about 0.3% w / w, between about 0.02% w / w to about 0.2% w / w, between about 0.02% w / w to about 0.1% w / w, between about 0.02% w / w to about 0.05% w / w, between about 0.03% w / w to about 0.5% w / w, between about 0.03% w / w to about 0.4% w / w, between about 0.03% w / w to about 0.3% w / w, between about 0.03% w / w to about 0.2% w / w, between about 0.03% w / w to about 0.1% w / w, between about 0.03% w / w to about 0.05% w / w, between about 0.04% w / w to about 0.5% w / w, between about 0.04% w / w to about 0.4% w / w, between about 0.04% w / w to about 0.3% w / w, between about 0.04% w / w to about 0.2% w / w, between about 0.04% w / w to about 0.1% w / w, between about 0.05% w / w to about 0.5% w / w, between about 0.05% w / w to about 0.4% w / w, between about 0.05% w / w to about 0.3% w / w, between about 0.05% w / w to about 0.2% w / w, between about 0.05% w / w to about 0.1% w / w, between about 0.1% w / w to about 0.5% w / w, between about 0.1% w / w to about 0.4% w / w, between about 0.1% w / w to about 0.3% w / w, or between about 0.1 % w / w to about 0.2% w / w of the composition. Further alternatively or in addition, a composition of the invention may also comprise one or more preservative. A preservative prevents microbial growth and / or extends the shelf life of a composition. Non-limiting examples of suitable preservatives include phenoxyethanol, benzyl alcohol, sorbic acid, benzoic acid, ethylhexylglycerin, caprylyl glycol, sodium benzoate and potassium sorbate. In some preferred embodiments, a composition comprises sorbic acid and / or potassium sorbate as a preservative. A composition of the invention may comprise a preservative at an amount of between about 0.01% w / w to about 0.5% w / w of the composition, such as between about 0.01% w / w to about 0.4% w / w, between about 0.01% w / w to about 0.3% w / w, between about 0.01% w / w to about 0.2% w / w, between about 0.01% w / w to about 0.1% w / w, between about 0.01% w / w to about 0.05% w / w, between about 0.02% w / w to about 0.5% w / w, between about 0.02% w / w to about 0.4% w / w, between about 0.02% w / w to about 0.3% w / w, between about 0.02% w / w to about 0.2% w / w, between about 0.02% w / w to about 0.1% w / w, between about 0.02% w / w to about 0.05% w / w, between about 0.03% w / w to about 0.5% w / w, between about 0.03% w / w to about 0.4% w / w, between about 0.03% w / w to about 0.3% w / w, between about 0.03% w / w to about 0.2% w / w, between about 0.03% w / w to about 0.1% w / w, between about 0.03% w / w to about 0.05% w / w, between about 0.04% w / w to about 0.5% w / w, between about 0.04% w / w to about 0.4% w / w, between about 0.04% w / w to about 0.3% w / w, between about 0.04% w / w to about 0.2% w / w, between about 0.04% w / w to about 0.1% w / w, between about 0.05% w / w to about 0.5% w / w, between about 0.05% w / w to about 0.4% w / w, between about 0.05% w / w to about 0.3% w / w, between about 0.05% w / w to about 0.2% w / w, between about 0.05% w / w to about 0.1% w / w, between about 0.1% w / w to about 0.5% w / w, between about 0.1% w / w to about 0.4% w / w, between about 0.1% w / w to about 0.3% w / w, or between about 0.1% w / w to about 0.2% w / w of the composition. Further alternatively or in addition, a composition of the invention may also comprise one or more colorant. A colorant may be used to add a colour, producing a distinctive appearance and facilitating identification of a composition. Non-limiting examples of suitable colorants include: mineral-derived colorants such as red ferric oxide, titanium oxide, lead oxide, copper sulfate, and carbon black; plant-derived colorant such as indigo, beta-carotene, paprika, turmeric, and saffron; animal-derived colorants, such as cochineal extract; synthetic colorants, such as Green S, Patent Blue V, Quinoline Yellow, Carmoisine, and Ponceau 4R; dyes such as Safranin; and pigments, such as copper -phthalocyaninie C.l. Pigment, and Hostaperm GNX green. In some preferred embodiments, a composition comprises copper-phthalocyaninie C.l. pigment or Hostaperm GNX green as a colorant. A composition of the invention may comprise a colorant at an amount of between about 0.01% w / w to about 0.1% w / w of the composition, such as between about 0.01% w / w to about 0.09% w / w, between about 0.01% w / w to about 0.08% w / w, between about 0.01% w / w to about 0.07% w / w, between about 0.01% w / w to about 0.06% w / w, between about 0.01% w / w to about 0.05% w / w, between about 0.02% w / w to about 0.1% w / w of the composition, between about 0.02% w / w to about 0.09% w / w, between about 0.02% w / w to about 0.08% w / w, between about 0.02% w / w to about 0.07% w / w, between about 0.02% w / w to about 0.06% w / w, between about 0.02% w / w to about 0.05% w / w, between about 0.03% w / w to about 0.1% w / w of the composition, between about 0.03% w / w to about 0.09% w / w, between about 0.03% w / w to about 0.08% w / w, between about 0.03% w / w to about 0.07% w / w, between about 0.03% w / w to about 0.06% w / w, between about 0.03% w / w to about 0.05% w / w, between about 0.04% w / w to about 0.1% w / w of the composition, between about 0.04% w / w to about 0.09% w / w, between about 0.04% w / w to about 0.08% w / w, between about 0.04% w / w to about 0.07% w / w, between about 0.04% w / w to about 0.06% w / w, between about 0.05% w / w to about 0.1% w / w of the composition, between about 0.05% w / w to about 0.09% w / w, between about 0.05% w / w to about 0.08% w / w, or between about 0.05% w / w to about 0.07% w / w of the composition. Further alternatively or in addition, a composition of the invention may also comprise one or more lubricant. A lubricant may be used to reduce friction between the die wall and particles as a composition is formed. Non-limiting examples of suitable lubricants include: boric acid, sodium oleate, sodium benzoate, sodium lauryl sulphate, sodium acetate, magnesium lauryl sulphate, calcium stearate, calcium carbonate, magnesium stearate, and talc. In some preferred embodiments, a composition comprises calcium carbonate as a lubricant. A composition of the invention may comprise a lubricant at an amount of between about 0.5% w / w to about 3.0% w / w of the composition, such as between about 0.5% w / w to about 2.5% w / w, between about 0.5% w / w to about 2.0% w / w, between about 0.5% w / w to about 1.0% w / w, between about 1.0 % w / w to about 3.0% w / w, between about 1.0% w / w to about 2.5% w / w, between about 1.0% w / w to about 2.0% w / w, between about 1.5% w / w to about 3.0% w / w, between about 1.5% w / w to about 2.5% w / w, or between about 1.5% w / w to about 2.0% w / w of the composition. Further alternatively or in addition, a composition of the invention may also comprise one or more glidant. A glidant may be used to improve the flow properties of powder by decreasing interparticle friction and cohesion. Non-limiting examples of suitable glidants include: silica and colloidal silicon dioxide. A composition of the invention may comprise a glidant at an amount of between about 0.1% w / w to about 2.0% w / w of the composition, such as between about 0.1% w / w to about 1.5% w / w, between about 0.1% w / w to about 0.5% w / w, between about 0.2% w / w to about 1.5% w / w, between about 0.2% w / w to about 0.5% w / w, between about 0.3% w / w to about 1.5% w / w, between about 0.3% w / w to about 0.5% w / w, between about 0.4% w / w to about 1.5% w / w, between about 0.4% w / w to about 2.0% w / w, between about 0.5% w / w to about 1.0% w / w, between about 0.1% w / w to about 2.0% w / w, between about 0.2% w / w to about 1.0% w / w, between about 0.2% w / w to about 2.0% w / w, between about 0.3% w / w to about 1.0% w / w, between about 0.3% w / w to about 2.0% w / w, between about 0.4% w / w to about 1.0% w / w, between about 0.5% w / w to about 1.5% w / w, between about 0.5% w / w to about 1.0% w / w, between about 1.0% w / w to about 2.0% w / w, or between about 1.0% w / w to about 1.5% of the composition. A composition of the invention may comprise water at an amount of <10% w / w, such as <10% w / w, <9% w / w, <8% w / w, <7% w / w, <6% w / w, <5% w / w, <4% w / w, <3% w / w, <2% w / w, <1% w / w. In some preferred embodiments, a composition of the invention may comprise water at an amount of <5% w / w, more preferably <2% w / w. Solid formulations Typically, a composition of the invention is a solid composition. Solid compositions include pellets, tablets, granules, powders or gels. The composition may be formulated as a wettable formulation (e.g. a wettable pellet, tablet, granule, powder or gel), a water-dispersible formulation (e.g. a water-dispersible pellet, tablet, granule, powder or gel), an effervescent formulation (e.g. a wettable pellet, tablet, granule, powder or gel). Preferred formulations of the compositions of the invention are pellets, coated core prill and / or granules. Pellets may be formed by extrusion. Particularly preferred compositions comprise an (inert) core, as described herein. Such compositions may be referred to as core prill, and may be formed by granulation of one or more core material, and optionally one or more additive, as described herein. Said core may comprise or consist of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof as described herein. Alternatively, or in addition, said core may be coated in a mixture of the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof as described herein. Said coated cores may be referred to as coated core prill. Such core prill may be formed by granulation of the materials comprised in the core, followed by compression of the granules (cores) into prills. The size of the solid composition (e.g. core prill or pellet) is not particularly limited, and may be selected based on standard sizes for a given type of solid formulation. By way of non-limiting example, when the solid composition is in pellet form, the average (e.g. mean) diameter of the pellets may be in the region of from about 1mm to about 10mm, particularly from about 1mm to about 5mm. For example, average (e.g. mean) diameter of the pellets may be in the region of from about 1,4mm to about 3.5mm. By way of non-limiting example, when the solid composition is in core prill form, the prill may have an average diameter of <2.4mm, such as <2.3mm, <2.2mm, <2.1 mm, <2.0mm, <1.9mm, <1.8mm, <1.7mm, <1.6mm3<1.5mm3 <1.4mm, <1.3mm, <1.2mm, or <1.1mm. The (inert) core of the invention may have an average diameter of between about 1.1mm to about 2.4mm, such as between about 1.1mm to about 2.3mm, between about 1.1mm to about 2.2mm, between about 1.1mm to about 2.1mm, between about 1.1mm to about 2.0mm, between about 1,2mm to about 2.4mm, between about 1,2mm to about 2.3mm, between about 1.2mm to about 2.2mm, between about 1.2mm to about 2.1mm, between about 1.2mm to about 2.0mm, between about 1,3mm to about 2.4mm, between about 1,3mm to about 2.3mm, between about 1.3mm to about 2.2mm, between about 1.3mm to about 2.1mm, between about 1.3mm to about 2.0mm, between about 1.4mm to about 2.4mm, between about 1.4mm to about 2.3mm, between about 1.4mm to about 2.2mm, between about 1.4mm to about 2.1mm, or between about 1.4mm to about 2.0mm. Any appropriate means may be used to quantify the size of the prill. For example, sieve analysis may be used to determine the average diameter of prill retained. By way of example, using a sieve with a 2.4mm mesh, the %w / w of prill retained may be 0% w / w (i.e. all prill are <2.4mm in diameter). By way of further example, using a sieve with a 2.0mm mesh, the %w / w of prill retained may be approximately 2-5% w / w (i.e. 2-5% w / w of the prill are <2.0mm in diameter). By way of further example, using a sieve with a 1.7mm mesh, the %w / w of prill retained may be approximately 20-30% w / w (i.e. 20-30% w / w of the prill are <1.7mm in diameter). By way of further example, using a sieve with a 1.4mm mesh, the %w / w of prill retained may be approximately 60-70% w / w (i.e. 60-70% w / w of the prill are <1.4m in diameter). By way of further example, using a sieve with a 1.18mm mesh, the %w / w of prill retained may be approximately 98% w / w (i.e. approximately 98% w / w of the prill are <1.18mm in diameter). A composition of the invention may comprise an average number of granules per gram of between about 50 to about 250 granules / g, such as between about 50 to about 200 granules / g, between about 50 to about 180 granules / g, between about 50 to about 175 granules / g, between about 50 to about 150 granules / g, between about 75 to about 250 granules / g, between about 75 to about 200 granules / g, between about 75 to about 180 granules / g, between about 75 to about 175 granules / g, between about 75 to about 150 granules / g, between about 100 to about 250 granules / g, between about 100 to about 200 granules / g, between about 100 to about 180 granules / g, between about 100 to about 175 granules / g, between about 100 to about 150 granules / g, between about 120 to about 250 granules / g, between about 120 to about 200 granules / g, between about 120 to about 180 granules / g, between about 120 to about 175 granules / g, between about 120 to about 150 granules / g, between about 130 to about 250 granules / g, between about 130 to about 200 granules / g, between about 30 to about 180 granules / g, or between about 130 to about 175 granules / g. In some preferred embodiments the average number of granules per gram is between about 130 to about 175 granules / g, such as about 130 granules / g, 140 granules / g, 150 granules / g, 160 granules / g, 170 granules / g, or175 granules / g. The core may be of any of any shape, e.g. spherical or cylindrical. A prill of the invention may comprise one or more additive, as described herein in the context of the compositions of the invention. Thus, in a composition of the invention one or more additive may be present within a prill, and / or within the mixture coated onto a prill (the coating) The one or more additive present in the prill and / or within the coating may be selected independently. For the avoidance of doubt, disclosure herein relating to additives (including the type of additive and / or the amount thereof) applies equally and without reservation to additives within the prill or the coating. Where amounts of additives are given, these may be the amount within the prill, the amount within the coating, or the total amount present in a composition (prill and coating combined). By way of non-limiting example, a prill comprising an organic material may comprise or consist of: (i) one or more binder (e.g. Povidone (PVP), Hydroxypropylmethyl cellulose, starch, sucrose or gelatine), optionally at an amount of between about 2.5% w / w to about 5% w / w; (ii) a filler optionally at an amount of between about 20% w / w to about 30% w / w; and (iii) one or more phagostimulant (e.g. frass, worm castings, bat guano, chicken manure, seaweed, kelp meal or lactose, preferably frass, more preferably black solider fly larvae frass), optionally at an amount of between about 20% w / w to about 30% w / w. Said prill may have a water content of <5% w / w, preferably <2% w / w. By way of further non-limiting example, a composition of the invention may comprise an inert core which is a dolomite chip, which is coated with an aqueous solution of iron phosphate dihydrate, glucoheptonic sodium slat aqueous solution, wheat flour, cornflour, maize starch, hydroxyethylecellulose, sorbic acid, green pigment, potassium sorbate, calcium carbonate and optionally a pigment, such as a green pigment. In particular, a composition of the invention may comprise an inert core (dolomite chip; 671.83 g) coated with a mixture of iron phosphate dihydrate (Fe 29%; 30 g; CAS 13463-10-0), glucoheptonic sodium slat aqueous solution at 30% w / w (36 mL; CAS 31138-65-5), wheat flour (194.54 g), cornflour (29.02 g), maize starch (6.45 g), hydroxyethylecellulose (1.17 g), sorbic acid (0.97 g;), green pigment (0.54 g), potassium sorbate (0.08 g), calcium carbonate (9.41 g) and water (19.89 g). Molluscicidal activity Typically, the molluscicidal activity of a composition of the invention is at least equivalent to that of a comparator composition, as defined herein. By at least equivalent, it may be meant that the molluscicidal activity of a composition of the invention is at least 90% of that of a comparator composition, as defined herein. The molluscicidal activity of a composition of the invention may be at least 30% greater, such as at least 35% greater, at least 40% greater, at least 50% greater or more than a comparator composition. Said comparator composition may be a corresponding composition without iron (e.g. iron phosphate) and glucoheptonic acid or an acceptable salt thereof (and hence the resulting iron glucoheptonate chelate). Said comparator composition may be an equivalent composition without iron glucoheptonate chelate, or an equivalent composition, but with iron glucoheptonate chelate replaced with iron chelated with EDTA (FeEDTA). Alternatively, or in addition, a composition of the invention is of such molluscicidal activity that the amount of composition required control the population of molluscs is at least 2 times less, such as at least 2.5 times less, at least 3 times less or lower than the amount of a comparator composition. Said comparator composition may be an equivalent composition without iron glucoheptonate chelate, or an equivalent composition, but with iron glucoheptonate chelate replaced with iron chelated with EDTA (FeEDTA). The skilled person will appreciate that molluscicidal activity may be determined based on observational studies (e.g., molluscs may stop feeding, become immobile or will be repelled in the presence of a molluscicidal composition). Molluscicidal activity may be determined based on evidence of damage, e.g. a reduction in the number of holes in a plant, or number of leaves damaged; and / or an increase in plant yield. Additionally, in the case of forced fed trials, molluscs will get as far away from the treated crop as the boundaries will allow them to. Other beneficial activities A composition of the invention may have one or more additional beneficial activity. For example, the composition of the invention may enhance plant yields (e.g., cabbage) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. For example, the composition of the invention may enhance plant yields by at least 15%. For example, the composition of the invention may enhance plant yields by at least 20%. For example, the composition of the invention may enhance plant yields by at least 25%. For example, the composition of the invention may enhance plant yields by at least 30%. For example, the composition of the invention may enhance plant yields by at least 35%. For example, the composition of the invention may enhance plant yields by at least 40%. For example, the composition of the invention may enhance plant yields by at least 45%. For example, the composition of the invention may enhance plant yields by at least 50%. Yield improvements may be of the whole plant, or a crop obtained therefrom. By way of further example, alternatively or in addition, the composition of the invention may improve plant vigour (or any trait(s) associated with plant vigour as described herein) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. By way of further example, alternatively or in addition, the composition of the invention may improve plant quality (or any trait(s) associated with plant quality as described herein) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. By way of further example, alternatively or in addition, the composition of the invention may improve plant tolerance to stress factors (or any trait(s) associated with plant tolerance to stress factors as described herein) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. By way of further example, alternatively or in addition, the composition of the invention may improve input use efficiency (or any trait(s) associated with input use efficiency as described herein) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. An advantage of the present composition is that it does not negatively affect soil quality. Instead, alternatively or in addition, the composition of the invention may improve the quality of a plant growth medium such as soil (or any trait(s) associated with the quality of a plant growth media as described herein) by at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45% or at least 50%. The improvement may be quantified relative to a plant growth medium such as soil that has not been treated with the composition of the invention. Methods of production Disclosed herein is a method for producing a composition for repelling and / or controlling a pest of the phylum Mollusca. Said methods are particularly preferred for producing compositions for repelling and / or controlling pests of the class gastropod, such as slugs and snails. Such a method of the invention may comprise or consist of the following steps: (i) granulating material which is to form an inert core (e.g. frass, particularly BSFL frass); (ii) milling the granulated material; (iii) compressing the milled granulated material to form prills; and (iv)coating the prills with a mixture comprising at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof. Said method may optionally comprising combining the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form a mixture. Alternatively or in addition, said method may optionally comprise combining at least one additive (such as those described herein) with the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form the mixture. Exemplary additives are disclosed herein. The additives may be dry additives, liquid additives, or a combination thereof. Where the additives comprise a combination of wet and dry additives, the dry additives may be added simultaneously or separately to the wet additives (preferably separately). The invention also provides a method for producing a composition of the invention following steps: (i) combining the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form a mixture; (ii) coating a plurality of inert cores with said mixture to form a plurality of coated core; (iii) compressing the plurality of coated cores to form prills. Said method may also comprise preparing prills prior to the coating step, such as by blending at least one core material and optionally one or more additive to form granules and milling the granules. Said method may also optionally comprise combining at least one additive (such as those described herein) with the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form the mixture. The invention also provides a method for producing a composition of the invention comprising coating a plurality of inert cores (e.g. dolomite prills or a pre-prepared compressed prill formed from frass as described herein) with a mixture comprising combining at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof. Said method may optionally comprising combining the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form a mixture prior to coating the plurality of inert cores. Alternatively or in addition, said method may optionally comprise combining at least one additive (such as those described herein) with the at least one phagostimulant, iron (e.g. iron phosphate) and glucoheptonic acid or acceptable salt thereof to form the mixture. Any of the above methods may include one or more quality control step, for example, to assess moisture content of the composition. The skilled person will appreciate that one or more drying step may be used to ensure that the composition has an appropriate moisture content. Drying may be achieved using any number of suitable methods, all of which will be well known to the skilled person. Exemplary methods include the use of a fluid bed dryer, tray dryer or hot air oven. In preferred embodiments, the method comprises the use of a fluid bed dryer. Any of the above methods may include the step of combining the cores or granules with one or more liquid ingredients. Also disclosed is a composition obtainable by any one of the aforementioned methods. Methods and uses Also provided is a composition for repelling and / or controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (slugs and snails), wherein the composition is as described above. Also provided is the use of composition for repelling and / or controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (slugs and snails), wherein the composition is as described above. Also disclosed is the use of a composition for controlling mollusc damage to plants in horticulture or agriculture wherein the composition is as described above. Also disclosed is a method for repelling and / or controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (slugs and snails), the method comprising contacting a plant, plant growth media (e.g., soil) or a mollusc with the composition as defined herein. Also disclosed is a method for controlling mollusc damage to plants in horticulture or agriculture, the method comprising contacting a plant, plant growth media (e.g., soil) or a mollusc with the composition as defined herein. Additionally, or alternatively, contacting a plant or plant growth media according to a method or use of the invention further improves at least one growing characteristic of a plant; optionally wherein the growing characteristic is selected from an improvement in plant vigour, plant quality, tolerance to stress factors and / or input use efficiency. Such characteristics are as described herein. The molluscicidal compositions of the invention may be useful in repelling and / or controlling pests from the phylum Mollusca, particularly the class gastropod (slugs and snails). By way of non-limiting example, the molluscicidal compositions of the invention may be useful in controlling molluscs from the Family Arionidae, such as Arion ater, A. ruus, A. hortensis, and A. subfuscus', molluscs from the Family Limacide, such as Deroceras reticulatum', and molluscs from the Family Helicidae, such as Helix aperta and H. aspersa. The molluscicidal compositions of the invention may be useful in the protection of monocots and / or dicots. Examples of plants of interest include, but are not limited to, corn (Zea mays), Brassica spp. (e.g., B. napus, B. rapa, B. juncea), particularly those Brassica species useful as sources of seed oil, alfalfa (Medicago sativa), rice (Oryza sativa), rye (Secale cereale), sorghum (Sorghum bicolor, Sorghum vulgare), millet (e.g., pearl millet (Pennisetum glaucum), proso millet (Panicum miliaceum), foxtail millet (Setaria italica), finger millet (Eleusine coracana)), sunflower (Helianthus annuus), saffiower (Carthamus tinctorius), wheat (Triticum aestivum), soybean (Glycine max), tobacco (Nicotiana tabacum), potato (Solanum tuberosum), peanuts (Arachis hypogaea), cotton (Gossypium barbadense, Gossypium hirsutum), sweet potato (Ipomoea batatus), cassava (Manihot esculenta), coffee (Coffea spp.), coconut (Cocos nucifera), pineapple (Ananas comosus), citrus trees (Citrus spp.), cocoa (Theobroma cacao), tea (Camellia sinensis), banana (Musa spp.), avocado (Per sea americana), fig (Ficus casica), guava (Psidium guajava), strawberry (Fragaria x ananassa), raspberry (Rubus spp., e.g. R. idaeus and R. occidentalis), mango (Mangifera indica), olive (Olea europaea), papaya (Carica papaya), cashew (Anacardium occidentale), macadamia (Macadamia integrifolia), almond (Prunus amygdalus), sugar beets (Beta vulgaris), sugarcane (Saccharum spp.), oats, barley, vegetables ornamentals, brassica [such as cabbage (Brassica oleracea), swede, turnip, kohlrabi, collard greens, kale, cauliflower, broccoli, broccoli and Brussels sprouts], and conifers. In some embodiments, protection of strawberry (Fragaria x ananassa) and / or raspberry (Rubus spp., e.g. R. idaeus and R. occidentalis) may be preferred. In some embodiments, protection of brassica, particularly cabbage, may be preferred. Vegetables include tomatoes (Lycopersicon esculentum), lettuce (e.g., Lactuca sativa), green beans (Phaseolus vulgaris), lima beans (Phaseolus limensis), peas (Lathyrus spp.), and members of the genus Cucumis such as cucumber (C. sativus), cantaloupe (C. cantalupensis), and musk melon (C. melo). Ornamentals include azalea (Rhododendron spp.), hydrangea (Macrophylla hydrangea), hibiscus (Hibiscus rosasanensis), roses (Rosa spp.), tulips (Tulipa spp.), daffodils (Narcissus spp.), petunias (Petunia hybrida), carnation (Dianthus caryophyllus), poinsettia (Euphorbia pulcherrima), and chrysanthemum. Conifers that may be employed in practicing the embodiments include, for example, pines such as loblolly pine (Pinus taeda), slash pine (Pinus elliotii), ponderosa pine (Pinus ponder osa), lodgepole pine (Pinus contorta), and Monterey pine (Pinus radiata)’ Douglas-fir (Pseudotsuga menziesii)', Western hemlock (Tsuga canadensis)’, Sitka spruce (Picea glauca)’, redwood (Sequoia sempervirens)’, true firs such as silver fir (Abies amabilis) and balsam fir (Abies baisamea)-, and cedars such as Western red cedar (Thuja plicata) and Alaska yellow-cedar (Chamaecyparis nootkatensis). Plants of the embodiments include crop plants (for example, corn, alfalfa, sunflower, Brassica, soybean, cotton, safflower, peanut, sorghum, wheat, millet, tobacco, etc.), such as corn and soybean plants. Turf grasses include, but are not limited to: annual bluegrass (Poa annuay annual ryegrass (Lolium multiflorumy Canada bluegrass (Poa compressay Chewing's fescue (Festuca rubray colonial bentgrass (Agrostis tenuisy creeping bentgrass (Agrostis palustrisy crested wheatgrass (Agropyron desertorumy fairway wheatgrass (Agropyron cristatumy hard fescue (Festuca longifolia); Kentucky bluegrass (Poa pratensisy orchardgrass (Dactylis glomeratay perennial ryegrass (Lolium perenney red fescue (Festuca rubray redtop (Agrostis albay rough bluegrass (Poa trivialisy sheep fescue (Festuca ovinay smooth bromegrass (Bromus inermisy tall fescue (Festuca arundinaceay timothy (Phleum pratensey velvet bentgrass (Agrostis caninay weeping alkaligrass (Puccinellia distansy western wheatgrass (Agropyron smithiiy Bermuda grass (Cynodon spp.y St. Augustine grass (Stenotaphrum secundatumy zoysia grass (Zoysia spp.y, Bahia grass (Paspalum notatumy carpet grass (Axonopus ajfinisy centipede grass (Eremochloa ophiuroidesy kikuyu grass (Pennisetum clandesinumy seashore paspalum (Paspalum vaginatumy, blue gramma (Bouteloua gracilisy buffalo grass (Buchloe dactyloidsy sideoats gramma (Bouteloua curtipendulay Preferably, the plant is a crop plant. For example, the crop may be a vegetable crop (e.g., potatoes, carrots, lettuce, and particularly brassica, such as cabbage or broccoli), a fruit crop (e.g., strawberries), leafy greens, a cereal / grain crop (e.g., wheat, corn, rice, barley, or millet), a pulse crop (e.g., peas, gram, or lentils) or an ornamental crop. More preferably, the crop is a brassica, a potato crop or a cereal / grain. In particularly preferred embodiments, the crop is a brassica. Crops are to be understood as being those which are naturally occurring, obtained by conventional methods of breeding, or obtained by genetic engineering. They include crops which contain so-called output traits (e.g. improved storage stability, higher nutritional value and improved flavour). Crops are to be understood as also including those crops which have been rendered tolerant to herbicides like bromoxynil or classes of herbicides such as ALS-, EPSPS-, GS-, HPPD- and PPG-inhibitors. An example of a crop that has been rendered tolerant to imidazolinones, e.g. imazamox, by conventional methods of breeding is Clearfield® summer canola. Examples of crops that have been rendered tolerant to herbicides by genetic engineering methods include e.g. glyphosate- and glufosinate-resistant maize varieties commercially available under the trade names RoundupReady®, Herculex I® and Libertylink®. Crops are also to be understood as being those which naturally are or have been rendered resistant to harmful insects. This includes plants transformed by the use of recombinant DNA techniques, for example, to be capable of synthesising one or more selectively acting toxins, such as are known, for example, from toxin-producing bacteria. Examples of toxins which can be expressed include d-endotoxins, vegetative insecticidal proteins (Vip), insecticidal proteins of bacteria colonising nematodes, and toxins produced by scorpions, arachnids, wasps and fungi. An example of a crop that has been modified to express the Bacillus thuringiensis toxin is the Bt maize KnockOut (Syngenta Seeds). An example of a crop comprising more than one gene that codes for insecticidal resistance and thus expresses more than one toxin is VipCot® (Syngenta Seeds). Crops or seed material thereof can also be resistant to multiple types of pests (so-called stacked transgenic events when created by genetic modification). For example, a plant can have the ability to express an insecticidal protein while at the same time being herbicide tolerant, for example Herculex I® (Dow AgroSciences, Pioneer Hi-Bred International). As described herein, the composition may be applied at various different times. The composition of the present invention may be applied pre-emergence or postemergence. For example, it may be applied as a preventative (before mollusc establishment) or curative (after mollusc establishment) treatment. The present invention envisages application of the compositions of the invention to plant propagation material prior to, during, or after planting, or any combination of these. Methods for applying or treating active ingredients on to plant propagation material or to the locus of planting are known in the art and include dressing, coating, pelleting, nursery tray application, in furrow application, or incorporation into soil (broad cast or in band). Alternatively, or in addition the composition may be applied on a suitable plant growth medium sown together with the plant propagation material. The rates of application of compositions of the present invention may vary within wide limits and depend on the nature of the soil, the method of application (e.g. pre- or postemergence etc.), the crop plant, the prevailing climatic conditions, and other factors governed by the method of application, the time of application and the target crop. By way of example, in some preferred embodiments, the composition is applied at seeding as a seed or propagation media treatment. Thus, the skilled person will appreciate that the amount of composition to be applied to a given locus will vary depending on, for example, the mollusc population to be controlled, the nature of the soil, the method of application, the target crop plant and the prevailing climatic conditions. By way of non-limiting example, a composition of the invention may be applied at a rate of between about 0.1 to about 15 kg per hectare, such as between about 0.1 to about 12 kg per hectare, between about 0.1 to about 10 kg per hectare, between about 0.1 to about 7 kg per hectare, between about 0.1 to about 5 kg per hectare, between about 0.1 to about 2 kg per hectare, between about 0.1 to about 1.5 kg per hectare, between about 0.1 to about 1 kg per hectare, between about 0.2 to about 15 kg per hectare, between about 0.2 to about 12 kg per hectare, between about 0.2 to about 10 kg per hectare, between about 0.2 to about 7 kg per hectare, between about 0.2 to about 5 kg per hectare, between about 0.2 to about 2 kg per hectare, between about 0.2 to about 1.5 kg per hectare, between about 0.2 to about 1 kg per hectare, between about 0.3 to about 15 kg per hectare, between about 0.3 to about 12 kg per hectare, between about 0.3 to about 10 kg per hectare, between about 0.3 to about 7 kg per hectare, between about 0.3 to about 5 kg per hectare, between about 0.3 to about 2 kg per hectare, between about 0.3 to about 1.5 kg per hectare, between about 0.3 to about 1 kg per hectare, between about 0.5 to about 15 kg per hectare, between about 0.5 to about 12 kg per hectare, between about 0.5 to about 10 kg per hectare, between about 0.5 to about 7 kg per hectare, between about 0.5 to about 5 kg per hectare, between about 0.5 to about 2 kg per hectare, between about 0.5 to about 1.5 kg per hectare, between about 0.5 to about 1 kg per hectare, between about 1 to about 15 kg per hectare, between about 1 to about 12 kg per hectare, between about 1 to about 10 kg per hectare, between about 1 to about 7 kg per hectare, between about 1 to about 5 kg per hectare, between about 1 to about 2 kg per hectare, between about 1 to about 1.5 kg per hectare, between about 2 to about 15 kg per hectare, between about 2 to about 12 kg per hectare, between about 2 to about 10 kg per hectare, between about 2 to about 7 kg per hectare, between about 2 to about 5 kg per hectare, between about 5 to about 15 kg per hectare, between about 5 to about 12 kg per hectare, between about 5 to about 10 kg per hectare, or between about 5 to about 7 kg per hectare, preferably between about 2 to about 10 kg per hectare or between about 5 to about 10 kg per hectare. Compositions of the invention may be used in combination with one or more additional agronomic chemical or biological agent. EXAMPLES The invention is now described with reference to the Examples below. These are not limiting on the scope of the invention, and a person skilled in the art would be appreciate that suitable equivalents could be used within the scope of the present invention. Thus, the Examples may be considered component parts of the invention, and the individual aspects described therein may be considered as disclosed independently, or in any combination. Example 1 - Example of composition of the invention “Anvil” composition The “Anvil” composition was prepared by coating an inert core (dolomite chip; 671.83 g) with a mixture of iron phosphate dihydrate (Fe 29%; 30 g; CAS 13463-10-0), glucoheptonic sodium slat aqueous solution at 30% w / w (36 mL; CAS 31138-65-5), wheat flour (194.54 g), cornflour (29.02 g), maize starch (6.45 g), hydroxyethylecellulose (1.17 g), sorbic acid (0.97 g;), green pigment (0.54 g), potassium sorbate (0.08 g), calcium carbonate (9.41 g) and water (19.89 g). Example 2 - Control of slugs and snails on cabbage using Iron Phosphate with Glucoheptonate Two sights trials were conducted to measure the control of slugs and snails using a composition of the invention comprising iron phosphate with glucoheptonate (i.e. iron glucoheptonate chelate), applied at 7kg / Ha (referred to in the Tables and Figures herein as “Anvil”). This was compared with a conventional FeEDTA product (referred to in the Tables and Figures herein as “Dawn”) applied at 7kg / Ha, and a metaldehyde product (referred to in the Tables and Figures herein as “Slugout”) applied at 10kg / Ha. As shown in Table 1 below, in the first trial, the Anvil composition of the invention significantly increased the % wt of the plant that is the cabbage heart compared with the Dawn or Slugout compositions (53% compared with 32% and 43%, respectively). This is also shown in Figure 1. As shown in Table 2 below, in the second trial, the Anvil composition of the invention resulted in an observable increase in the % wtof the plant that is the cabbage heart compared with the Dawn composition (59% compared with 55%). This is also shown in Figure 2. Significantly, and as shown in Table 3 below, in the first trial, the amount of damage to the cabbage plants was significantly reduced using Anvil composition of the invention compared with the Dawn or Slugout compositions. This is also shown in Figure 3. This reduction in damage was also observed in the second trial (see Table 4 and Figure 4). Table 1: Cabbage plant weight results fortrial 1 TRI IS heart nil 788 1950 4D Shsg nut 782 1772 43 Dawn 458 1452 32 Anvil 1081 2020 83 Table 2: Cabbage plant weight results fortrial 2 UH' wt_heart % heart: nil 1039 2821 50 Slug out 1237 2182 58 Dawn 1193 2159 55 Anvil 1314 2204 59 Table 3: Cabbage plant damage results fortrial 1 TOT Heart Std_hules Heart Total holes Geter tea Hutes oh S.8 2X1 8.7 Slug out 21.7 ias 23 Dawn is.5 03 3.7 Anvil 2 J. 13 1.8 Table 4: Cabbage plant damage results fortrial 2 TO Heart xtdjhute Heart small holos Heart large holes Heart toUl^eaf Outer holes / leaf nil 48 2027 8.4 7.1 193 Slug out 4,2 2.9 0.78 <7 Dawn 133 8.0 1.8 2.33 9.1 Anvil 8,8 as 0.2 0339 23 Example 3 - Production of a frass-based prill for molluscicidal compositions of the invention For every kilogram of feed consumed, Black Soldier Fly Larvae (BSFL) produce approximately 200 to 400 grams of frass. Producing 1 kilogram of BSFL protein typically requires around 2.5 to 4 kilograms of dry feed, such that producing 1 kilogram of BSFL protein results in approximately 500 grams to 1.6 kilograms of frass. Based on Current Trends BSFL, is growing rapidly due to its potential for sustainable protein production, with reports suggesting that the global market for insects as animal feed could reach several billion dollars by the end of the decade. As such, within the next 10 years BSFL frass production with be approx. 185,700 tons / year. BSFLfrass is used to produce a core prill for coating using the following exemplary components and key manufacturing steps. Additional components include: • Binders such as Microcrystalline Cellulose (MCC), Starch, Gelatin, Polyvinylpyrrolidone (PVP), Sucrose; • Fillers such as Lactose, Mannitol, Calcium Phosphate, Dicalcium Phosphate, Perlite; • Lubricants such as Magnesium Stearate, Stearic Acid, Sodium Stearyl Fumarate • Glidants such as Colloidal silicon dioxide and Talc To make prill from BSFL frass, the following manufacturing process is used: 1. Blending - The active ingredient and excipients are thoroughly mixed to ensure uniform homogeneous distribution, such as within a tulip or rotary mixer. 2. Granulation - Wet Granulation: Liquid is added to the powder mix, forming granules which are then dried. - Dry Granulation: Powders are compressed into slugs or sheets and then milled into granules. 3. Milling - To ensure granules are of appropriate size and even distribution. 4. Compression - The granulated mixture is compressed into prills using a tablet press or similar machinery. The resulting prill can be coated with a mixture of the at least one phagostimulant, iron phosphate and glucoheptonic acid or an acceptable salt thereof, according to the invention.

Claims

1. A molluscicide composition comprising:(a) at least one phagostimulant;(b) iron phosphate; and(c) glucoheptonic acid or an acceptable salt thereof.

2. The composition of claim 1, further comprising an inert core, wherein the inert core is coated with a mixture of the at least one phagostimulant, iron phosphate and glucoheptonic acid or an acceptable salt thereof.

3. The composition of claim 1 or 2, wherein the glucoheptonic acid or acceptable salt thereof is a sodium salt of glucoheptonic acid, optionally a-D-Glucoheptonic acid sodium salt.

4. The composition of any one of the preceding claims, wherein the inert core comprises or consists of an inorganic material and / or an organic material.

5. The composition of claim 4, wherein the inert core comprises or consists of an inorganic material selected from the group consisting of dolomite, lime, reactive and / or rock phosphate, gypsum, bentonite, kaolin, talc, attapulgite, diatomaceous clay, preferably inorganic material is dolomite.

6. The composition of claim 4, wherein the inert core comprises or consists of an organic material and the organic material is frass, worm castings, bat guano, chicken manure, seaweed or kelp meal, preferably wherein the inert core comprise or consists of frass, more preferably black solider fly larvae frass.

7. The composition of any one of the preceding claims, wherein:(a) said composition comprises iron at an amount of at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, or at least about 5% w / w, preferably content in iron is between about 0.5% w / w to about 4% w / w; and / or(b) the composition comprises the iron glucoheptonate chelate in which the iron content is between about 10% w / w to about 15% w / w, preferably between about 12% w / w to about 14% w / w.

8. The composition of any one of the preceding claims, in which comprises glucoheptonic acid or an acceptable salt thereof at an amount of at least about 0.5% w / w, at least about 0.6% w / w, at least about 0.7% w / w, at least about 0.8% w / w, at least about 0.9% w / w, at least about 1% w / w, at least about 1.1% w / w, at least about 1.2% w / w, at least about 1.3% w / w, at least about 1.4% w / w or at least 1.5% w / w, preferably at least 1% w / w; optionally wherein the glucoheptonic acid or an acceptable salt thereof is sodium glucoheptonate.

9. The composition of any one of the preceding claims, wherein the at least one phagostimulant is selected from the group consisting of wheat flour, soy flour, oat flour, rice bran flour, yeast extracts, molasses, fish meal and cornflour.

10. The composition of any one of the preceding claims, wherein the at least one phagostimulant is a combination of two or more phagostimulants, preferably a combination of wheat flour and cornflour.

11. The composition of any one of the preceding claims, which comprises at least one phagostimulant at an amount of at least 10% w / w, at least 15% w / w, at least 20% w / w or at least 25% w / w, preferably at least 20% w / w.

12. The composition of any one of the preceding claims, further comprising one or more of:(a) a binder, optionally at an amount of between about 2% w / w to about 10% w / w;(b) a filler, optionally at an amount of between about 5% w / w to about 80% w / w;(c) a viscosity modifier, optionally at an amount of between about 0.01% w / w to about 0.5% w / w;(d) phagostimulant, optionally at an amount of between about 10% w / w to about 30% w / w;(e) a preservative, optionally at an amount of between about 0.01 % w / w to about 0.5% w / w;(f) a colorant, optionally at an amount of between about 0.01% w / w to about 0.10% w / w;(g) a lubricant, optionally at an amount of between about 0.5% w / w to about 3% w / w;(h) a glidant, optionally at an amount of between about 0.1% w / w to about 2% w / w; and / or(i) water, optionally at an amount of between about 1% w / w to about 5% w / w.

13. The composition of any one of the preceding claims, which comprises:(a) a binder at an amount of between about 2.5% w / w to about 10% w / w, optionally wherein the binder is selected from povidone (PVP), hydroxypropylmethyl cellulose, starch, sucrose, and gelatin;(b) a phagostimulant at an amount of between about 20% w / w to about 30% w / w; and(c) water at an amount of between less than about 5% w / w, preferably less than about 2% w / w.

14. The composition of any one of the preceding claims, which is in particulate form, and wherein optionally the average number of granules per gram is between about 130 granules / g to about 200 granules / g, preferably average number of granules per gram is 175 granules / g or less, such as between about 130 granules / g to about 175 granules / g.

15. The composition of any one of the preceding claims, which is stable:(a) at 54°C for at least 14 days; and / or(b) at 21 °C for at least 12-months, preferably at least 18-months.

16. A method for producing a composition as defined in any one of claims 1 to 15, said method comprising the steps of:(i) granulating material which forms an inert core;(ii) milling the granulated material; and(iii) compressing the milled granulated material to form prills; and(iv) coating the prills with a mixture comprising at least one phagostimulant, ironphosphate and glucoheptonic acid or acceptable salt thereof.

17. A composition obtainable by the method of claim 16.

18. The composition of any one of claims 1-15 or 17 for controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (e.g. slugs and snails).

19. Use of the composition as defined in any one of claims 1-15 or 17 for repelling and / or controlling the population size of a pest of the phylum Mollusca, preferably a pest of the class gastropod (e.g., slugs and snails).

20. A method for controlling mollusc damage to plants in horticulture or agriculture, the method comprising contacting a plant, a plant growth medium or a mollusc with the composition as defined in any one of claims 1-15 or 17.

21. The composition for use of claim 18, the use of claim 19 or the method of claim 20, wherein the composition has a molluscicidal activity that is at least 30% greater than a composition without the at least one phagostimulant, iron phosphate and glucoheptonic acid or acceptable salt thereof.

22. The composition for use of claim 18 or 21, the use of claim 19 or 21 or the method of claim 20 or 21, wherein the amount of the composition required to control the population of molluscs or mollusc damage is 2 times less than the amount of a composition without the at least one phagostimulant, iron phosphate and glucoheptonic acid or acceptable salt thereof that is required to control the same population of molluscs or mollusc damage.

23. The composition for use of any one of claims 18, 21 or 22, the use of any one of claims 19, 21 or 22, or the method of any one of claims 20-22, wherein the application rate of the composition is between about 2 to about 15 kg per hectare, preferably between about 5 to about 10 kg per hectare.s