MICROPARTICLE COMPOSITIONS COMPRISING SAFLUFENACIL, METHOD FOR PRODUCING THE COMPOSITIONS AND SAID COMPOSITIONS FOR USE IN THE CONTROL OF UNDESIRABLE VEGETATION

Abstract

Claim 1: A microparticle composition comprising saflufenacil, characterized in that saflufenacil is present in the form of microparticles comprising solid saflufenacil surrounded or enveloped by an aminoplast polymer, which is a product of the polycondensation of one or more amino compounds and one or more aldehydes, and further comprising at least one lignin A-based sulfonic acid, such as lignosulfonic acid, ethoxylated lignosulfonic acid, or oxidized lignins, wherein said lignosulfonic acid A has an average molar weight (MW) of at least 10,000 Da. Claim 12: A method for producing the composition according to any one of claims 1 to 11, characterized in that it comprises the following steps: (i) providing an aqueous suspension or dispersion of solid saflufenacil particles; (ii) adding an aminoplast precondensate to the aqueous suspension; iii) perform the polycondensation of the aminoplast precondensate.Claim 14: The use of a microparticle composition according to any of claims 1 to 11, characterized in that it is for controlling unwanted vegetation. Claim 15: A method for controlling unwanted vegetation, characterized in that a microparticle composition according to any of claims 1 to 11 can act on plants, their environment, and / or seeds.

Description

27099 MICROPARTICLE COMPOSITIONS COMPRISING SAFLUFENACIL The present invention relates to microparticle compositions comprising saflufenacil, to a method for their preparation and to the use of these microparticle compositions for controlling unwanted vegetation. Saflufenacil is the international nonproprietary name (INN) of the herbicidal phenyl uracil compound 2-chloro-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1-(2H)pyrimidinyl]-4fluoro-N-[[methyl(1-methylethyl)amino]sulfonyl]benzamide. Saflufenacil was first described in WO 01 / 083459. Saflufenacil is a highly active herbicide that effectively inhibits the growth of unwanted vegetation at low application rates. Unfortunately, its selectivity is not always satisfactory, and its use in crops is somewhat limited. Furthermore, saflufenacil lacks sufficient residual activity, and therefore, regrowth can occur shortly after application. Herbicides, such as saflufenacil, are generally applied as dilute aqueous spray liquors, which are prepared by diluting a concentrated formulation of the herbicide with water. For this purpose, the pesticide compounds can be formulated in solid forms, e.g., as wettable powders (WP) and water-dispersible granules (WG), as well as in liquid forms, e.g., emulsions, emulsifiable concentrates (EC), suspoemulsions (SE), or suspension concentrates (SC). For effective encapsulation, it is particularly important that the formulations can be easily diluted with water and that the dilution remains stable for a certain time without separation of the active ingredient, as this can cause clogging of the spray nozzles.For ecological reasons, it is preferable that the formulation does not contain large amounts of organic solvents, which mainly favor solid formulations and aqueous SC formulations. Despite the advantages associated with the use of SCs mentioned above, there are several problems known to the mid-level practitioner that sometimes arise with SCs, such as sedimentation during prolonged storage or storage at elevated temperatures, the resistance of settled particles to resuspension, and the formation of crystalline material during storage. As a result, the formulations can be difficult to handle, and bioefficacy can be inconsistent. 974113 of 39 Several problems arise when formulating saflufenacil. Saflufenacil has an N-aminosulfonylcarboxamide side chain, which can undergo hydrolysis at basic pH values. Furthermore, saflufenacil can exist in various crystalline and non-crystalline modifications, namely amorphous forms, crystalline hydrates, and a crystalline anhydrate, which can undergo uncontrolled conversion into another crystalline form. This conversion, in turn, can cause coarsening of the saflufenacil particles, particularly when formulated as a concentrated suspension. These factors could result in a reduction in the chemical and physical stability of the formulations, an effect that is particularly pronounced when the formulations are stored for extended periods and / or at elevated temperatures.These factors could also cause poor dilution properties, as coarse saflufenacil particles tend to separate from the diluted formulation. Several stable aqueous agricultural formulations of saflufenacil have been described. WO 2011 / 023759 describes an aqueous suspension concentrate formulation containing saflufenacil anhydrate and a combination of certain anionic and nonionic surfactants. WO 2011 / 023758 describes an aqueous suspension concentrate formulation of saflufenacil that also contains glyphosate as a co-herbicide. Although these formulations are stable, they do not solve the problem of poor culture selectivity and insufficient residual activity. The provision of pesticide-active compounds is mainly known in the form of microcapsule formulations (see H. Mollet, A. Grubenmann Formulation Technology 1st ed., Wiley-VCH Verlag GmbH, Weinheim 2001, chapter 6.4 and chapter 14.2.2). Microencapsulation can be achieved mainly by coacervate techniques, spray drying, fluidized bed coating, electrostatic microencapsulation or in situ polymerization. These techniques provide active compound particles, where the active compound is surrounded by a polymeric wall material. WO 2017 / 037210 discloses saflufenacil microparticle compositions. Although microencapsulation can improve the acute toxicity of a pesticide or reduce degradation, it is difficult to achieve. In particular, the addition of pesticide particles during or after encapsulation is the main problem. If an encapsulation method can work for a compound, 974113 of 39 a particular pesticide compound, it does not necessarily work for another pesticide compound. When attempts are made to encapsulate a solid material in an aqueous suspension of the solid material using an in situ polymerization technique, the solid material tends to agglomerate, thus forming large particles of the active ingredient, which are incorporated into the polymer matrix. In general, a suspension obtained in this way is no longer suitable for agricultural use. Until now, it has not been possible to effectively encapsulate solid pesticide particles using small amounts of an encapsulating polymer. One of the challenges of known saflufenacil formulations is to increase compatibility with other pesticides. SUMMARY OF THE INVENTION An object of the present invention is to provide a saflufenacil formulation that is compatible with a wide range of other pesticides, especially other tank-mix components commonly combined with saflufenacil, such as glyphosate, glufosinate, dicamba, etc. Furthermore, it should exhibit high chemical and physical stability over extended storage periods while maintaining its biological efficacy. Furthermore, it should also be compatible with tank-mix components commonly combined with saflufenacil. Upon dilution with water, the formulation should yield a stable aqueous composition of saflufenacil without the formation of coarse material or a supernatant liquid. Surprisingly, it was found that the objective can be achieved by microparticle compositions of solid saflufenacil, wherein the solid saflufenacil is surrounded or enveloped by an aminoplast polymer, and further comprising at least one lignin A-based sulfonic acid, such as lignosulfonic acid, ethoxylated lignosulfonic acid or oxidized lignins, wherein said lignosulfonic acid A has an average molar weight MW of at least 10,000 Da. In the microparticle compositions of the present invention, saflufenacil has a lower tendency to degradation. Therefore, the microparticle compositions of the present invention provide high physical and chemical stability over extended storage periods while maintaining the biological efficacy of saflufenacil. In addition, the microparticle compositions of the present invention can be easily formulated. Furthermore, the microparticle compositions of the present invention in the form of aqueous suspensions provide improved tank mix compatibility and can therefore be easily tank mixed with other pesticide formulations and non-chemically modified pesticides. 974113 of 39 interact negatively with other formulations with respect to their dilution stability. Surprisingly, it was also discovered that solid saflufenacil can be efficiently microencapsulated by using aminoplast precondensates and by carrying out the process described herein below. Therefore, a second aspect of the present invention relates to a process for preparing the microparticle compositions as described herein, wherein the process comprises the following steps: i) providing an aqueous suspension of solid saflufenacil particles; ii) adding an aminoplast precondensate to the aqueous suspension of the saflufenacil particles; iii) carrying out the polycondensation of the aminoplast precondensate, for example, by heating the aqueous suspension from step ii) to a pH, wherein the polycondensation of the aminoplast precondensate takes place at the reaction temperature. This process results in a stable aqueous suspension in which saflufenacil is present in the form of microparticles, comprising solid saflufenacil surrounded or enveloped by an aminoplast polymer. From this, the microparticles can be isolated, if necessary. Surprisingly, this process does not result in significant agglomeration of the saflufenacil particles, as observed with other in situ polymerization techniques. DETAILED DESCRIPTION OF THE INVENTION In the microparticle composition of the invention, saflufenacil is present in the form of microparticles, comprising solid saflufenacil as the core material, wherein said composition also comprises at least one lignin A-based sulfonic acid, such as lignosulfonic acid, ethoxylated lignosulfonic acid, or oxidized lignins, wherein said lignosulfonic acid A has an average molar weight MW of at least 10,000 Da. In the microparticles, the solid saflufenacil forms the core material which is surrounded or enveloped by at least one aminoplast polymer. In this context, it should be understood that the aminoplast polymers may form a regular or irregular coating surrounding or enveloped the core material. The microparticles may have a single solid core formed by the saflufenacil and a coating or matrix formed by the aminoplast polymer. It may also be possible for the microparticles to have a 974113 of 39 “domain structure” comprising a certain amount of solid saflufenacil particles, for example, from 3 to 1000 or 10 to 500, of amorphous or crystalline saflufenacil, which are enveloped by the aminoplast polymer. It is not necessary for the aminoplast polymer to form a completely closed coating. Frequently, however, the coating completely surrounds the core material like a membrane, thus forming a barrier between the core material and the surrounding material. Aminoplast polymers, also called amino resins, amine condensation resins or amide resins, are polycondensation products of one or more aldehydes, such as formaldehyde, acetaldehyde, propanal, glyoxal or glutaraldehyde, with one or more amine compounds generally having at least two primary amino groups, such as urea, thiourea, melamine, which may be fully or partially etherified, cyanoguanamine (= dicyandiamide) and benzoguanamine.Some examples of aminoplast polymers are melamine-formaldehyde polycondensates (melamine-formaldehyde resins or MF resins), which include resins derived from fully or partially etherified melamine-formaldehyde condensates, urea-formaldehyde resins (UF resins), thiourea-formaldehyde resins (TUF resins), melamine-urea-formaldehyde polycondensates (MUF resins), which include resins derived from fully or partially etherified melamine-urea-formaldehyde condensates, melamine-thiourea-formaldehyde polycondensates (MTUF resins, which include resins derived from fully or partially etherified melamine-thiourea-formaldehyde condensates, urea-glutaraldehyde resins, benzoguanamine-formaldehyde polycondensates, dicyandiamide formaldehyde polycondensates and urea-glyoxal polycondensates.Suitable aminoplast polymers for microencapsulation are known and can be found, inter alia, in Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Edition, Vol. 2, pp. 440-469, the prior art cited in the introductory part, US 4,918,317, EP 26914, EP 218887, EP 319337, EP 383,337, EP 415273, DE 19833347, DE 19835114 and WO 01 / 51197. In UF and TUF resins, the molar ratios of urea or thiourea to formaldehyde are generally in the range of 1:0.8 to 1:4, in particular 1:1.5 to 1:4, especially 1:2 to 1:3.5. If glutaraldehyde is used instead of formaldehyde, the molar ratios of urea or thiourea to glutaraldehyde may be in the range of 1:1.2 to 1:3, especially 1:1.5 to 1:2.5. 974113 of 39 In MF and MUF resins, the molar ratios of melamine to formaldehyde are generally in the range of 1:1.5 to 1:10, in particular 1:3 to 1:8, preferably 1:4 to 1:6. In MUF and MTUF resins, the molar ratios of melamine + urea or thiourea to formaldehyde are generally in the range of 1:0.8 to 1:9, in particular 1:2 to 1:8, preferably 1:3 to 1:6. The molar ratio of urea or thiourea to melamine may be in the range of 50:1 to 1:100 and in particular 30:1 to 1:30. In the preparation of the aforementioned aminoplast resins, the precondensates can be used in the form of etherified precondensates of amine and aldehyde compounds. In these etherified precondensates, the methylol groups are formed by the reaction of the amino groups with formaldehyde and an alkanol or an alkanediol, in particular, with a C1-C4 alkanol, such as methanol, ethanol, n-propanol or n-butanol, in particular, methanol, or a C2-C4 alkanediol, such as ethylene glycol. The degree of etherification of these resins can be adjusted by the molar ratio of the amino groups to the alkanol, which is generally in the range of 10:1 to 1:10, preferably in the range of 2:1 to 1:5. The aminoplast polymer material surrounding or enveloping the solid saflufenacil is preferably selected from the group consisting of melamine-formaldehyde resins, including melamine-formaldehyde resins derived from fully or partially etherified melamine-formaldehyde condensates, and urea-formaldehyde resins and mixtures thereof. In particular, the aminoplast polymer material surrounding or enveloping the solid saflufenacil is a melamine-formaldehyde resin, in particular a melamine-formaldehyde resin derived from fully or partially etherified melamine-formaldehyde condensates, which may contain small amounts, for example, from 1 to 20 mol % based on melamine, of urea. In the microparticle compositions of the invention, the amount of aminoplast polymer material surrounding or enveloping the solid saflufenacil generally does not exceed the amount of saflufenacil contained in the composition and is preferably at most 40% by weight, in particular at most 35% by weight and especially at most 30% by weight or at most 25% by weight, based on the total amount of saflufenacil and aminoplast polymers. The amount of aminoplast polymer material surrounding or enveloping the solid saflufenacil is preferably from 0.5 to 40% by weight, in particular from 1 to 35% by weight and, 974113 of 39 in particular from 5 to 25% by weight, based on the total weight of the capsule, i.e. based on the total amount of saflufenacil and aminoplast polymers. The polymer material of the microparticle composition of the invention, which surrounds or envelops the solid saflufenacil, may also comprise non-water-soluble polymers. However, the amount of such polymers generally does not exceed 20% of the total amount of encapsulating polymer material and preferably does not exceed 10% by weight of the total amount of polymer material surrounding or enveloping the solid saflufenacil. The solid saflufenacil, which is surrounded or enveloped by at least one aminoplast polymer, may be any known form of solid saflufenacil, including amorphous saflufenacil and, in particular, crystalline saflufenacil, for example, the crystalline anhydrate of saflufenacil described in WO 08 / 043835 or a crystalline hydrate of saflufenacil described in WO 08 / 043836. In addition to solid saflufenacil, the core material of the microparticles may contain an oil, for example a hydrocarbon solvent, such as an aromatic, paraffinic or isoparaffinic hydrocarbon, preferably having a boiling point greater than 100 ° C, a vegetable oil, such as corn oil, rapeseed oil or a fatty acid ester, such as C1-C10 alkyl ester of a C10-C22 fatty acid, in particular methyl esters or ethyl esters of vegetable oils, such as rapeseed oil methyl ester or corn oil methyl ester. In a particular embodiment, the core material does not contain an oil as defined herein or contains less than 10% by weight, based on the weight of the core material, of an oil. In particular, the core does not contain an oil. In addition to solid saflufenacil, the core material of the microparticles may also contain an additional pesticidal compound, in particular a herbicidal compound or a safener, which preferably has a low water solubility, generally not exceeding 10 g / l, in particular 5 g / l or even 1 g / l at 25°C (deionized water). In particular, the solid saflufenacil represents at least 80%, in particular at least 90% of the pesticides contained in the microparticles. The microparticles of the present invention are discrete particles generally having a particle size of less than 50 pm. Preferably, the particle size of the microparticles, i.e. their diameter, generally does not exceed 40 pm, preferably does not exceed 35 pm and in particular does not exceed 30 pm. The given particle size is the so-called d90 value, which is to be understood as the value that is not exceeded by the diameters of at least 90% by weight of the microparticles.974113 of 39 microparticles. The microparticles have an average particle diameter, also referred to herein as the d50 value, ranging from 1 to 25 μm, in particular from 1.5 to 20 μm, especially from 2 to 10 μm. The d50 value is defined as the value that is greater than the diameters of 50% by weight of the particles and less than the diameter of 50% by weight of the particles. The d90 value and the d50 value can be calculated from the particle size distribution of the microparticles. Typically, the d10 value of the particles, i.e. the value of diameters that at least 10% by weight of the microparticles exceed, is at least 0.5 μm and may be, for example, in the range from 0.5 μm to 10 μm, in particular from 1 to 5 μm.The particle size distribution of the microparticles (i.e., diameters) can be determined by conventional methods, such as dynamic or static light scattering of an aqueous dispersion of the microparticle composition, for example, at 25 °C and a concentration in the range of 0.1 to 1% by weight. The microparticle compositions according to the invention contain at least one anionic polymeric surface-active substance A1, hereinafter referred to as anionic polymeric surfactant A1 or polymeric surfactant A1, wherein said at least one anionic polymeric surface-active substance A1 is a lignin-based sulfonic acid A, wherein said lignin-based sulfonic acid A1 has an average molar weight MW of at least 10,000 Da. Preferably, said lignin-based sulfonic acid A1 has an average molar weight MW of 10,000 Da to 100,000 Da. Preferably, said lignin-based sulfonic acid A1 has a degree of sulfonation of 1.0 to 2.5 moles per kilogram of said lignosulfonic acid. The average molar weight MW of said lignin-based sulfonic acid, as applied herein, is determined by gel penetration chromatography according to DIN 55672-3. The degree of sulfonation of said lignin-based sulfonic acid, as applied herein, is calculated from the sulfur content of said lignin-based sulfonic acid, as determined by atomic emission spectroscopy, from which the sulfate content (determined according to DIN 38405-D5-2) is subtracted. Preferred lignin-based sulfonic acids A1 are lignosulfonic acid, ethoxylated lignosulfonic acid or oxidized lignins. Preferred lignin-based sulfonic acids A1 are lignosulfonic acid, ethoxylated lignosulfonic acid or oxidized lignins. In one embodiment, the microparticle compositions according to the invention contain at least one anionic polymeric surfactant. 974113 of 39 A2, wherein the surface-active substance A2 consists of homo- or copolymers of monoethylenically unsaturated monomers M1 having a sulfonic acid group, optionally, with one or more comonomers M2 different from the monomers M1. The anionic groups in these anionic polymeric surfactants can be partially or completely neutralized. Suitable counterions are alkali metal ions, such as sodium and potassium, alkaline earth ions, such as magnesium or calcium, and ammonium. In the case of anionic polymeric surfactants containing a sulfonate group, the anionic groups are preferably at least partially neutralized. Preferably, the polymeric surfactant A2 is selected from homo- or copolymers formed from i) at least one monoethylenically unsaturated monomer M1 having a sulfonic acid group, such as vinylsulfonic acid, allylsulfonic acid, styrenesulfonic acid, vinyltoluenesulfonic acid, (meth)acrylate monomers having a sulfonic acid group, such as 2-acryloxyethylsulfonic acid, 2-acryloxypropylsulfonic acid or 4-acryloxybutylsulfonic acid, and (meth)acrylamide monomers having a sulfonic acid group, such as 2-acrylamidoethylsulfonic acid, 2-acrylamidopropylsulfonic acid or 2-acrylamido-2-methylpropanesulfonic acid, and ii) optionally, one or more monoethylenically unsaturated comonomers M2 different from the monomers M1, such as styrene, C1-C4alkylacrylates, C1-C4-alkyl methacrylates, acrylamide, methacrylamide, acrylic acid, methacrylic acid, C1-C4-alkyl acrylates, C1-C4-alkyl methacrylates. In one embodiment, the polymeric surfactant A2 is selected from homo- or copolymers formed from i) monomers M1, which are selected from (meth)acrylate monomers having a sulfonic acid group, such as 2-acryloxyethylsulfonic acid, 2-acryloxypropylsulfonic acid or 4-acryloxybutylsulfonic acid, and (meth)acrylamide monomers having a sulfonic acid group, such as 2-acrylamidoethylsulfonic acid, 2-acrylamidopropylsulfonic acid or 2-acrylamido-2-methylpropanesulfonic acid, and ii) optionally, one or more monoethylenically unsaturated comonomers M2 different from monomers M1, such as styrene, C1-C4 alkylacrylates, C1-C4-alkylmethacrylates, acrylamide, methacrylamide, 974113 of 39 acrylic, methacrylic acid, C1-C4-alkylacrylates, C1-C4-alkylmethacrylates. In particular, the polymeric surfactant A2 comprises or is selected from homo- and copolymers of i) monomers M1, which is 2-acrylamido-2-methylpropanesulfonic acid, and ii) optionally, one or more monoethylenically unsaturated comonomers M2 different from monomers M1, such as styrene, C1-C4 alkyl acrylates, C1-C4 alkyl methacrylates, acrylamide, methacrylamide, acrylic acid, methacrylic acid, C1-C4 alkyl acrylates, C1-C4 alkyl methacrylates. In these preferred, particularly preferred or especially preferred polymeric surfactants A.2, the amount of monomers M1 is preferably at least 50% by weight, based on the total amount of monomers forming the polymeric surfactant. Even more preferred are polymeric surfactants A which are homo- or copolymers of monomers M1, wherein the amount of monomers M1 is at least 90% by weight, based on the total amount of monomers forming the polymeric surfactant. These polymers are known, for example, and are commercially available under the trade names Lupasol S and Lupasol PA 140. In another particular group of embodiments, the microparticle compositions according to the invention comprise the surfactants of group A3, wherein the polymeric surfactants A3 are arylsulfonic acid formaldehyde condensates and arylsulfonic acid formaldehyde urea condensates, in particular, naphthalenesulfonic acid formaldehyde condensates. Examples of polymeric surfactants A3 include arylsulfonic acid formaldehyde condensates and arylsulfonic acid formaldehyde urea condensates, such as naphthalenesulfonic acid formaldehyde condensates, phenolsulfonic acid formaldehyde condensates, cresolsulfonic acid formaldehyde condensates, etc.; In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1 and no surfactant A2 or A3. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant A2 and no surfactant A3. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant 974113 of 39 A3 and no surfactant A2. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant A2 and at least one surfactant A3. The amount of anionic polymeric surfactants A1 to A3 in the composition is preferably from 0.1 to 50% by weight, in particular from 2 to 40% by weight and more preferably from 3 to 30% by weight, based on the total amount of saflufenacil and aminoplast polymer. Polymeric surfactants A1 to A3 are also referred to herein as polymeric surfactants A. It was found to be beneficial to combine the polymeric surfactants A1 to A3 with one or more additional anionic surfactants B different from these, which provides for stabilization of an aqueous formulation comprising the microparticles. Suitable anionic surfactant compounds B are surfactants having an anionic group, which is selected from phosphate or phosphonate groups and sulfate or sulfonate groups, of which the latter are preferred. These surfactants B are generally included in the microparticle composition in the form of their salts, in particular, the sodium, potassium or ammonium salts.Examples of anionic surfactants B include salts of alkylsulfonates, alkylsulfates, alkylphosphates, half-esters of alkanols alkoxylated with sulfuric acid or phosphoric acid, alkylarylsulfonates, alkylarylphosphates, half-esters of alkylphenols alkoxylated with sulfuric acid or phosphoric acid, and half-esters of mono-, di- or tristyrylphenols alkoxylated with sulfuric acid or phosphoric acid. Among these anionic surfactants B, those of Formula (I) are preferred: R-(OA)mOX (I) where R is a hydrocarbon radical having 8 to 40 carbon atoms and preferably 12 to 30 carbon atoms and optionally one oxygen atom; A is, independently of each other, 1,2-ethylene, 1,2-propylene or 1,3-propylene, especially 1,2-ethylene; m is from 0 to 50, preferably from 0 to 30 and most preferably from 0 to 20; and X is SO3M or PO3M2, where M is selected from H, alkali metal ions, such as K and Na, alkaline earth metal ions, such as ½ Ca and ½ 974113 of 39 Mg, and ammonium. Preferably, M is an alkali metal ion, and especially sodium. Some examples of suitable hydrocarbon radicals R having 8 to 40 carbon atoms are alkyls having 8 to 40 and preferably 12 to 30 carbon atoms, phenyl, which may be substituted by one or two alkyl radicals having 4 to 20 carbon atoms, phenyl, which is substituted by a phenoxy radical, wherein phenyl and / or phenoxy may contain an alkyl radical having 4 to 20 carbon atoms, tristyrylphenyl radical, etc. In a preferred embodiment of the present invention, the radical R in Formula I is a tristyrylphenyl radical. Anionic surfactants B are preferred which are of Formula (I), where R, m and X have the following meanings: R is alkyl having 8 to 30, in particular, 10 to 20 carbon atoms, m is 0, X is SO3M, where m is selected from alkali metal ions, such as K and Na, alkaline earth metal ions, such as ½ Ca and ½ Mg, and ammonium. Preferably, M is an alkali metal, and especially sodium. Particularly preferably, another anionic surfactant B is an alkyl sulfate such as lauryl sulfate, especially sodium lauryl sulfate. If present, the amount of anionic surfactant B, in particular the surfactant compound of formula (I), is preferably from 0.1 to 10% by weight, in particular from 0.3 to 7% by weight and more preferably from 0.5 to 5% by weight, based on the total amount of saflufenacil and aminoplast polymer. If present, the amount of anionic surfactant B, in particular the surfactant compound of formula (I), is preferably chosen such that the weight ratio of the anionic polymeric surfactant A to the anionic surfactant B is from 1:1 to 20:1, in particular from 2:1 to 10:1. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, no surfactant A2 or A3 and the anionic surfactant B is sodium lauryl sulfate. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant A2, no surfactant A3 and the anionic surfactant B is sodium lauryl sulfate. In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant A3, no surfactant A2 and the anionic surfactant B is sodium lauryl sulfate. 974113 of 39 In one embodiment, the microparticle compositions according to the invention comprise at least one surfactant A1, at least one surfactant A2, at least one surfactant A3, and the anionic surfactant B is sodium lauryl sulfate. The compositions according to the invention may also contain a non-ionic surface-active compound (non-ionic surfactant). Preferred non-ionic surfactants include the neutral surface-active compounds of Formula (II), R'-(OB)n-OH (II) where R' is a hydrocarbon radical having 8 to 40 and, more preferably, 12 to 30 carbon atoms and, optionally, one oxygen atom, B is C2-C4-alkan-1,2-diyl, for example, 1,2-ethylene, 1,2-propylene or 1,2-butylene or a combination thereof and more preferably 1,2-ethylene or a combination thereof with 1,2-propylene, and n is from 3 to 100, preferably from 4 to 50 and more preferably from 5 to 40. Preferred nonionic surfactants include block copolymers of ethylene oxide (EO) and propylene oxide (PO). Such block copolymers may have, for example, the structure R-(EO)x-(PO)y-(EO)z, wherein R is H or a C4 to C30 alkyl moiety and x, y, and z, independently, are numbers from 2 to 100. Examples of suitable hydrocarbon radicals R' include the radicals mentioned for R. In a preferred embodiment of the invention, the radical R' is a phenyl radical which is substituted with a C4-C18-alkyl group. If present, the amount of non-ionic surfactant, in particular the surfactant compound of Formula (II), is preferably from 1 to 150 g / l, in particular from 2 to 60 g / l in the final formulation. In a particular embodiment of the invention, the composition does not contain non-ionic surfactant or contains less than 1% by weight of non-ionic surfactant, in particular less than 0.5% by weight of non-ionic surfactant, based on the total amount of saflufenacil and aminoplast polymer. In particular embodiments, the microparticle composition is in the form of an aqueous suspension. This suspension contains the solid saflufenacil microparticles as a dispersed phase and an aqueous medium as the continuous phase. The aqueous suspension can be obtained by the process for preparing the microparticle composition as described herein. It can also be 974113 of 39 obtainable by redispersing a solid microparticle composition in an aqueous medium, as described herein. The term aqueous medium refers to the liquid phase of the composition and comprises an aqueous solvent and, optionally, compounds dissolved therein, for example, surfactants as mentioned above and, if present, one or more conventional formulation additives, such as thickeners or biocides. The aqueous solvent of the aqueous suspension is water or a mixture thereof with water-miscible organic solvent, such as C1-C4-alkanols, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, isobutanol, or tert-butanol, C2-C5-alkanediols and C3-C8-alkantriols, preferably from the group consisting of ethylene glycol, 1,2-propanediol, 1,3-propanediol, glycerol and 1,4-butanediol. Typically, the amount of water in the aqueous solvent is at least 50% by weight, in particular at least 80% by weight or at least 90% by weight, depending on the aqueous solvent.The aqueous solvent may consist primarily of water, i.e., water forms at least 95% by weight of the total amount of solvent present in the suspension. The aqueous solvent may also be a mixture of water and the aforementioned water-miscible organic solvent. In the latter case, the weight ratio of water to water-miscible organic solvent in the aqueous solvent is preferably in the range of 99:1 to 1:1; more preferably, in the range of 50:1 to 3:1; and most preferably, in the range of 20:1 to 4:1. In other words, the amount of organic solvent may be from 1 to 50% by weight, more preferably from 2 to 25% by weight, and most preferably from 5 to 20% by weight, based on the total weight of the aqueous solvent. In general, the aqueous suspension contains the microparticles in an amount of at least 5% by weight, and the amount may be 50% by weight or even higher, in each case based on the total weight of the aqueous suspension and calculated as the total amount of aminoplast polymer and saflufenacil. Frequently, the aqueous suspension contains the microparticles in an amount of 10 to 45% by weight, in particular 20 to 40% by weight, in each case based on the total weight of the aqueous suspension and calculated as the total amount of aminoplast polymer and saflufenacil. The concentration of saflufenacil in the aqueous suspension will frequently be in the range of 5 to 40% by weight, in particular 15 to 30% by weight, based on the total weight of the aqueous suspension. If present, the concentration of polymeric anionic surfactant A in the aqueous suspension will often be in the range of 0.1 to 15% by weight, in 974113 of 39 particular, from 0.2 to 6% by weight, based on the total weight of the aqueous suspension of the microparticles. If present, the concentration of the anionic surfactant B in the aqueous suspension will often be in the range of 0.1 to 15% by weight, in particular 0.2 to 6% by weight, based on the total weight of the aqueous suspension of the microparticles. The aqueous compositions according to the invention may also comprise customary formulation auxiliaries, such as viscosity-modifying additives (thickeners), antifoam agents, preservatives, buffers, inorganic dispersants, etc., which are generally used in aqueous herbicide formulations. These auxiliaries may be incorporated into the aqueous suspension after step iii) of the preparation process described herein has been carried out. In general, the amount of additives will not exceed 10% by weight, in particular 5% by weight of the total weight of the aqueous suspension. Suitable inorganic dispersants, also called anti-caking agents, to prevent agglutination of the microparticles are silica (such as Sipernat® 22 from Degussa), alumina, calcium carbonate, and the like. In the context of the present invention, silica is preferred as the inorganic dispersant.In general, the concentration of inorganic dispersants in the final suspension does not exceed 2% by weight, based on the total weight of the final suspension and, if present, is preferably in the range of 0.01 to 2% by weight, in particular 0.02 to 1.5% by weight and especially 0.1 to 1% by weight, based on the total weight of the final formulation. Suitable thickeners are compounds that affect the flow behavior of the concentrated suspension and can assist in stabilizing the aqueous suspension of microparticles from caking. In this connection, mention may be made, for example, of commercial thickeners based on polysaccharides, such as methylcellulose, carboxymethylcellulose, hydroxypropylcellulose (Klucel® grades), xanthan gum (commercially available, for example, as Kelzan® grades from Kelco or Rhodopol® grades from Rhodia), synthetic polymers, such as acrylic acid polymers (Carbopol® grades), polyvinyl alcohol (for example, Mowiol® and Poval® grades from Kuraray) or polyvinylpyrrolones, silicic acid or phyllosilicates, such as montmorillonite and bentonites, which can be hydrophobicized, (commercially available as Attaclay® grades and Attaflow® grades from BASF SE; or as Veegum® grades and Van Gel® grades from RT Vanderbilt).In the context of the present invention, xanthan gum is preferred as a thickener. In general, the concentration of. 974113 of 39 thickeners in the aqueous suspension does not exceed 2% by weight, based on the total weight of the aqueous suspension, and is preferably in the range of 0.01 to 2% by weight, in particular 0.02 to 1.5% by weight and especially 0.1 to 1% by weight, based on the total weight of the aqueous suspension or the final formulation, respectively. Suitable antifoam agents for the compositions according to the invention are, for example, silicone emulsions (e.g., Silicone SRE-PFL from Wacker or Rhodorsil® from Bluestar Silicones), polysiloxanes and modified polysiloxanes, including polysiloxane block polymers, such as FoamStar® SI and FoamStar® ST products from BASF SE, long-chain alcohols, fatty acids, organofluorine compounds and mixtures thereof. Suitable preservatives for preventing microbial spoilage of the compositions of the invention include formaldehyde, alkyl esters of p-hydroxybenzoic acid, sodium benzoate, 2-bromo-2-nitropropane-1,3-diol, o-phenylphenol, thiazolinones such as benzisothiazolinone, 5-chloro-2-methyl-4-isothiazolinone, pentachlorophenol, 2,4-dichlorobenzyl alcohol, and mixtures thereof. Commercially available isothiazolinone-based preservatives are sold, for example, under the trademarks Proxel® (Arch Chemical), Acticide® MBS (Thor Chemie), and Kathon® MK (Rohm & Haas). If appropriate, the compositions according to the invention, in particular the aqueous suspensions, may comprise buffers to regulate the pH. Examples of buffers are alkali metal salts of weak organic or inorganic acids, for example, phosphoric acid, boric acid, acetic acid, propionic acid, citric acid, fumaric acid, tartaric acid, oxalic acid, and succinic acid. Furthermore, the compositions according to the invention, in particular the aqueous suspensions, may be formulated with conventional binders, for example, aqueous polymer dispersions, water-soluble resins, for example, water-soluble alkyd resins, or waxes. The compositions of the invention may also contain one or more adjuvants. Suitable adjuvants are known to those of ordinary skill in the art and include surfactants, crop oil concentrates, spreaders, binders, wetting agents, and penetrants. In other particular embodiments, the microparticle composition is in the form of a solid composition. This solid composition contains the microparticles of solid saflufenacil, 974113 of 39 optionally, one or more surfactants, in particular, the polymeric surfactant A and, optionally, the anionic surfactant B and, optionally, an inert solid carrier material. Solid compositions may be, for example, redispersible powders, water-dispersible granules, wettable powders, and the like. Solid carriers include, for example, mineral earths such as silica, silica gels, silicates, talc, kaolin, limestone, quicklime, chalk, bolus, loess, clay, dolomite, diatomaceous earth, calcium sulfate, magnesium sulfate and magnesium oxide, ground synthetic materials, fertilizers, such as ammonium sulfate, ammonium phosphate, ammonium nitrate, ureas, and products of vegetable origin, such as cereal flour, tree bark flour, wood flour and nutshell flour, cellulose powders or other solid carriers. The solid compositions according to the invention may also comprise customary formulation auxiliaries, such as antifoam agents, preservatives, buffers, inorganic dispersants, etc., which are generally used in solid herbicide formulations. These auxiliaries may be incorporated into the solid formulation at any conventional stage of its preparation process. In general, the amount of additives will not exceed 10% by weight, in particular, 5% by weight of the total weight of the solid composition. The solid composition can be obtained from an aqueous suspension, which is primarily formed in the process of preparing the microparticle composition as described herein by removing the aqueous phase from the aqueous suspension. Removal of the aqueous phase can be achieved by separating the aqueous phase from the solid microparticles, for example, by centrifugation or filtration. Preferably, the aqueous phase is removed by an evaporation process, for example, spray drying or lyophilization. As indicated above, the process for producing the composition comprises a first step, wherein an aqueous suspension of saflufenacil particles is provided. To this end, the solid saflufenacil is suspended in an aqueous solvent, in particular, water. The aqueous solvent may contain one or more surfactants, in particular at least one polymeric surfactant A1, which is assumed to act as a protective colloid, and, optionally, one or more anionic surfactants B. Preferably, the particle size of the saflufenacil particles in the aqueous suspension before encapsulation is less than 45 pm, in particular not 974113 of 39 exceeds 40 pm, preferably does not exceed 30 pm, and in particular does not exceed 25 pm. The given particle size is referred to as the d90 value. Preferably, the active substance particles have an average particle diameter, also referred to herein as the d50 value, which ranges from 0.5 to 25 pm, in particular from 1 to 20 pm, especially from 1.5 to 15 pm. The d50 value is defined as the value that is greater than the diameters of 50% by weight of the particles and less than the diameter of 50% by weight of the particles. The d10 value is preferably at least 0.5 pm and may vary, for example, from 0.5 pm to 10 pm, in particular from 1 to 5 pm. The d90 value, like the d50 value, can be calculated from the particle size distribution of saflufenacil particles, which can be determined by conventional methods such as dynamic or static light scattering at 25 °C and a concentration in the range of 0.1 to 1% by weight. It has been found to be beneficial to initiate or carry out the polycondensation in the presence of at least one anionic polymeric surfactant A2. The polymeric surfactant A2 will often be in the range of 0.1 to 10% by weight, in particular, 1 to 6% by weight, based on the total weight of the aqueous suspension. It has been found to be beneficial for the aqueous suspension of step i) to also contain at least one anionic surfactant B, in particular an anionic surfactant comprising or selected from the surfactants of Formula (I). If present, the concentration of the anionic surfactant B in the aqueous suspension of step i) will often be in the range of 0.01 to 2% by weight, in particular 0.1 to 1% by weight, based on the total weight of the aqueous suspension. The aqueous suspension of the saflufenacil particles can be provided by analogy to known methods for preparing aqueous suspensions of saflufenacil, for example, as described in WO 2011 / 023759. In one embodiment, step i) comprises step ia) and step ib). In step ia), solid saflufenacil, in particular a crystalline form of saflufenacil, e.g., saflufenacil anhydrate or one of the hydrate forms, and the aqueous solvent and, optionally, at least a portion of the surfactant are mixed in a conventional mixing device, which is capable of providing sufficient shear to form the desired suspension. Suitable mixing devices include, in particular, high shear mixers, such as UltraTurrax apparatus, static mixers, e.g., systems having mixing nozzles, bead shaker mills, colloid mills, cone mills, and other homogenizers. In general, the sequence in which the components are combined 974113 of 39 individual surfactants is not critical. It may be advantageous to carry out step ia) by first mixing the aqueous solvent and at least a portion of the surfactant, for example the surfactant of group A and optionally surfactant B, until a homogeneous mixture is obtained, and then adding the solid saflufenacil with shear to said homogeneous mixture. The mixture obtained from step ia), for example a coarse suspension of saflufenacil in the aqueous solvent, is then subjected, in step ib), to suitable means for reducing the particle size of the saflufenacil particles present in the mixture, generally to less than 40 μm, preferably to less than 30 μm and in particular to less than 20 μm (d90 value), for example to a particle size (d90) in the range of 0.5 to 15 μm. Stage i.b) can be carried out by any physical abrasion method, such as grinding, crushing, or milling, in particular by wet grinding or wet milling, including, for example, bead grinding, hammer grinding, jet grinding, air-classified grinding, pin grinding, cryogenic grinding processes, and the like. Typically, steps ia) and ib) are carried out subsequently. However, it is also possible to carry out these steps together. In another embodiment of the invention, step i) comprises providing saflufenacil in powder form, wherein the d90 value of the powder particles is less than 40 µm and, in particular, at most 30 µm or at most 20 µm, for example, the particle size (d90) is in the range from 1 to <40 µm, in particular, 1 to 30 µm or 1 to 20 µm. The powder is generally prepared by grinding the solid saflufenacil, for example, the anhydrate or the crystalline hydrate, by a conventional dry milling technique, for example, air milling, until a powder having the desired particle size is obtained. The obtained powder is then suspended in the aqueous solvent or in an aqueous solution of the surfactant of group A and, optionally, surfactant B. In one embodiment, the polymeric surfactants A2 are added to the suspension of the saflufenacil provided in step i) before starting, initiating or carrying out the polycondensation, in particular, before adding the aminoplast precondensate. In particular, it may be advantageous to keep the aqueous suspension of saflufenacil, containing the polymeric surfactant A2, for some time, for example, for 10 to 180 minutes, before starting the polycondensation, while the polymeric surfactant A1 is added only after step i). In step ii), an aminoplast precondensate is added to the aqueous suspension of step i), which, after curing in step iii), forms the aminoplast polymer. 974113 of 39 non-water-soluble solid, which envelops or surrounds the solid saflufenacil particles, because polycondensation occurs preferentially at the surface of the solid saflufenacil particles. The amount of aminoplast precondensate added in step ii) is chosen such that the desired amount of aminoplast polymer is achieved in the final microparticle composition. In fact, the amount added corresponds to the amount of aminoplast resins in the microparticles, taking into account that the mass is reduced by the amount of water formed during polycondensation, and is generally in the range of 0.5 to 40% by weight, in particular 1 to 35% by weight and especially 5 to 25% by weight, based on saflufenacil and calculated as organic matter. Suitable precondensates, which may be added in step ii), include melamine-formaldehyde precondensates, including fully or partially etherified melamine-formaldehyde precondensates, urea-formaldehyde precondensates, thiourea-formaldehyde precondensates, melamine-urea-formaldehyde precondensates (MUF resins), including mixtures of fully or partially etherified melamine-formaldehyde precondensates and urea-formaldehyde precondensates, urea-glutaraldehyde precondensates, benzoguanamine-formaldehyde precondensates, mixtures of dicyandiamide and formaldehyde, and urea-glyoxal polycondensates. Aminoplast precondensates suitable for microencapsulation are known and can be found, inter alia, in Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Edition, Vol. 2, pp. 440-469, the prior art cited in the introductory part, US 4,918,317, EP 26914, EP 218887, EP 319337, EP 383.337, EP 415273, DE 19833347, DE 19835114 and WO 01 / 51197. Suitable precondensates are commercially available, for example, Cymel types, such as Cymel® 303, 327, 328 or 385 (etherified melamine formaldehyde resins from Cytec), Maprenal® types, such as Maprenal® MF 900w / 95, MF 915 / 75IB, MF 920 / 75WA, MF 921w / 85WA, (etherified melamine formaldehyde resins from Ineos), Kauramin® types from BASF SE, such as Kauramin® 783, Kauramin® 792 or Kauramin® 753 (melamine formaldehyde resins), Kauramin® 620 or Kauramin® 621 (melamine urea formaldehyde resins), Kaurit® types from BASF SE, such as Kaurit® 210, 216, 217 or 220 (urea formaldehyde resins), Luracoll® types such as Luracoll® SD (etherified melamine formaldehyde resins), Luwipal® types such as Luwipal® 063, Luwipal® 069 (etherified melamine formaldehyde resins) or Plastopal® types. 974113 of 39 such as Plastopal® BTM, Plastopal® BTW (etherified urea-formaldehyde resins). In suitable urea-formaldehyde or thiourea-formaldehyde precondensates, the molar ratios of urea or thiourea to formaldehyde are generally in the range of 1:0.8 to 1:4, in particular 1:1.5 to 1:4, especially 1:2 to 1:3.5. In suitable melamine-formaldehyde or melamine-(thio)ureaformaldehyde precondensates, the molar ratios of melamine to formaldehyde are generally in the range of 1:1.5 to 1:10, in particular 1:3 to 1:8, preferably 1:4 to 1:6. In suitable melamine-formaldehyde or melamine-(thio)ureaformaldehyde precondensates, the molar ratios of melamine + urea or thiourea to formaldehyde are generally in the range from 1:0.8 to 1:9, in particular from 1:2 to 1:8, preferably from 1:3 to 1:6. The molar ratio of urea or thiourea to melamine is usually in the range from 5:1 to 1:50 and in particular from 30:1 to 1:30. The precondensates can be used in the form of etherified precondensates of amino compounds and aldehydes. In these etherified precondensates, the methylol groups are formed by the reaction of the amino groups with formaldehyde and an alkanol or an alkanediol, in particular a C1-C4 alkanol, such as methanol, ethanol, n-propanol or n-butanol, in particular methanol, or a C2-C4 alkanediol, such as ethylene glycol. The degree of etherification of these resins can be adjusted by the molar ratio of the amino groups to the alkanol, which is generally in the range of 10:1 to 1:10, preferably in the range of 2:1 to 1:5. The precondensates are most preferably selected from the group consisting of melamine-formaldehyde resins, which includes fully or partially etherified melamine-formaldehyde precondensates and urea-formaldehyde precondensates and mixtures thereof. In particular, the precondensate is a fully or partially etherified melamine-formaldehyde condensate, which may contain small amounts, for example, 1 to 20 mol % based on melamine, of urea. The addition of the precondensate to the aqueous suspension is normally achieved by adding the precondensate in the form of an aqueous or alcoholic solution of the precondensate to the aqueous suspension or by mixing suitable quantities of the dissolved precondensate. Preferably, suitable mixing devices, such 974113 of 39, such as continuous agitators or mixers, are used to obtain a uniform distribution of the precondensate in the aqueous suspension. It may be advantageous to add the precondensate, preferably in the form of a solution, to the aqueous suspension of saflufenacil with stirring. Preferably, the addition of the precondensate is carried out under conditions where the polycondensation reaction is slow or does not occur, for example, where the pH of the aqueous suspension is at least 6, for example, in the range of pH 6 to pH 10, or where the temperature does not exceed 30 °C, or both. The polycondensation of the aminoplast precondensate can be carried out or initiated in a known manner, for example, by heating the aqueous suspension to a certain reaction temperature, at a pH, where the polycondensation occurs at the reaction temperature. During polycondensation, the aminoplast precondensate is converted into a water-insoluble aminoplast resin, which precipitates from the aqueous phase and preferentially deposits on the surface of the solid saflufenacil particles, thereby enveloping or surrounding the solid saflufenacil particles. In this way, efficient encapsulation can be achieved even with small amounts of aminoplast precondensate. Preferably, the aminoplast polycondensation is carried out at a pH of less than 6, in particular at a pH of at most 5, for example, in the range of pH 0 to 6, more particularly in the range of pH 1 to 5, or in the range of pH 2 to 4. The pH of the aqueous suspension is generally adjusted by the addition of suitable amounts of an organic or inorganic acid, such as sulfuric acid, hydrochloric acid, phosphoric acid, carboxylic acid, including alkanoic acids, alkandioic acids, or hydroxycarboxylic acids, such as formic acid, acetic acid, propionic acid, oxalic acid, malic acid, or citric acid, and alkyl or arylsulfonic acids, such as methanesulfonic acid or toluenesulfonic acid. It is preferred that at least a portion, in particular the majority of the acid, is present in the aqueous suspension, before the aqueous suspension is heated to the reaction temperature. Preferably, the polycondensation of the aminoplast precondensate is carried out at elevated temperature, in particular at a temperature of at least 30 °C, in particular at least 40 °C or at least 50 °C, for example at a temperature in the range of 30 to 100 °C, in particular in the range of 40 to 95 °C or in the range of 50 to 90 °C. It may be possible to start the polycondensation of the aminoplast at a comparatively low temperature, for example a temperature in the range of 30 to 974113 of 39 °C or 35 to 60 °C, and then completing the polycondensation reaction at a higher temperature of, for example, 50 to 100 °C or 60 to 90 °C. The time to complete the polycondensation may vary depending on the reactivity of the precondensate, the temperature and the pH of the aqueous suspension, and may last from 1 h to 24 h, in particular, from 2 to 12 h. Preferably, the polycondensation reaction is carried out, at least partially, at temperatures of at least 50 °C, in particular, at least 60 °C, for example, from 1 to 8 h at a temperature in the range of 50 to 100 °C, in particular, 60 to 90 °C. The aqueous suspension obtained from the saflufenacil microparticles can be neutralized by the addition of a base. Preferably, the pH of the suspension is adjusted to a pH of at least 6, for example, a pH in the range of 6 to 10, in particular, in the range of 6.5 to 9.0. In a preferred embodiment, the base used is ammonia, especially aqueous ammonia. From the aqueous suspension obtained, the microparticles can be isolated, for example, by filtration or centrifugation, or the aqueous suspension can be spray-dried, freeze-dried, or granulated to obtain a solid composition in the form of a powder or granules. The solid composition can be redispersed or reformulated using formulation aids as described above. The aqueous suspension may also be used as such or may be formulated as a liquid formulation, for example, as a suspension, using suitable formulation auxiliaries as described above, for example, thickeners, anionic surfactants B, non-ionic surfactants and / or biocides. The invention also relates to the use of the microparticle composition of the invention for the protection of crop plants and to methods for controlling unwanted vegetation, comprising applying the formulations, in diluted and undiluted form, to plants, their environment and / or seeds. The compositions of the invention provide good vegetation control in non-crop areas, especially at high application rates. However, high application rates are generally not required compared to conventional non-encapsulated saflufenacil formulations to achieve similar control. In crops such as soybeans, cotton, oilseed rape, flax, lentils, rice, sugar beet, sunflower, tobacco and cereals, for example corn or wheat, the compositions of the invention act against broadleaf weeds and weeds of the 974113 of 39 grass and cause less damage to crop plants compared to conventional non-encapsulated saflufenacil formulations. This effect is particularly observed at low application rates. Furthermore, the compositions of the invention provide long-lasting residual activity, exceeding the residual activity of conventional non-encapsulated saflufenacil formulations. The compositions according to the invention have an excellent herbicidal action against unwanted vegetation, in particular against a broad spectrum of harmful monocotyledonous and dicotyledonous weeds of economic importance. Some representatives of monocotyledonous and dicotyledonous weeds are mentioned below, which can be controlled by compositions according to the invention, without the enumeration implying a restriction to certain species. In one embodiment, the compositions according to the invention are used to control monocotyledonous weeds. Examples of monocotyledonous weeds on which compositions of the invention act effectively are selected from the genera Hordeum spp., Echinochloa spp., Poa spp., Bromus spp., Digitaria spp., Eriochloa spp., Setaria spp., Pennisetum spp., Eleusine spp., Eragrostis spp., Panicum spp., Lolium spp., Brachiaria spp., Leptochloa spp., Avena spp., Cyperus spp., Axonopris spp., Sorghum spp. and Melinus spp.. Preferred examples of monocotyledonous weeds in which the compositions of the invention act effectively are selected from the species Hordeum murinum, Echinochloa crus-galli, Poa annua, Bromus rubens L., Bromus rigidus, Bromus secalinus L., Digitaria sanguinalis, Digitaria insularis, Eriochloa gracilis, Setaria faberi, Setaria viridis, Pennisetum glaucum, Eleusine indica, Eragrostis pectinacea, Panicum miliaceum, Lolium multiflorum, Brachiaria platyphylla, Leptochloa fusca, Avena fatua, Cyperus compressus, Cyperus esculentes, Axonopris offinis, Sorghum halapense and Melinus repens. Particularly preferred examples of monocotyledonous weeds on which the compositions of the invention act effectively are selected from the genera Echinochloa spp., Digitaria spp., Setaria spp., Eleusine spp. and Brachiaria spp. In one embodiment, the compositions of the invention are used to control dicotyledonous weeds. Examples of dicotyledonous weeds on which the compositions of the invention act effectively are selected from the genera Amaranthus spp., 974113 of 39 Erigeron spp., Conyza spp., Polygonum spp., Medicago spp., Mollugo spp., Cyclospermum spp., Stellaria spp., Gnaphalium spp., Taraxacum spp., Oenothera spp., Amsinckia spp., Erodium spp., Erigeron spp., Senecio spp., Lamium spp., Kochia spp., Chenopodium spp., Lactuca spp., Malva spp., Ipomoea spp., Brassica spp., Sinapis spp., Urtica spp., Sida spp., Portulaca spp., Richardia spp., Ambrosia spp., Calandrinia spp., Sisymbrium spp., Sesbania spp., Capsella spp., Sonchus spp., Euphorbia spp., Helianthus spp., Coronopus spp., Salsola spp., Abutilon spp., Vicia spp., Epilobium spp., Cardamine spp., Picris spp., Trifolium spp., Galinsoga spp., Epimedium spp., Marchantia spp., Solanum spp., Oxalis spp., Metricaria spp., Plantago spp., Tribulus spp., Cenchrus spp. Bidens spp., Veronica spp. and Hypochaeris spp. Preferred examples of dicotyledonous weeds on which the compositions of the invention act effectively are selected from the species Amaranthus spinosus, Polygonum convolvulus, Medicago polymorpha, Mollugo verticillata, Cyclospermum leptophyllum, Stellaria media, Gnaphalium purpureum, Taraxacum officinale, Oenothera laciniata, Amsinckia intermedia, Erodium cicutarium, Erodium moschatum, Erigeron bonariensis (Conyza bonariensis), Senecio vulgaris, Lamium amplexicaule, Erigeron canadensis, Polygonum aviculare, Kochia scoparia, Chenopodium album, Lactuca serriola, Malva parviflora, Malva neglecta, Ipomoea hederacea, Ipomoea lacunose, Brassica nigra, Sinapis arvensis, Urtica dioica, Amaranthus blitoides, Amaranthus retroflexus, Amaranthus hybridus, Amaranthus lividus, Sida spinosa, Portulaca oleracea, Richardia scabra, Ambrosia artemisiifolia, Calandrinia caulescens, Sisymbrium irio, Sesbania exaltata, Capsella bursa-pastoris, Sonchus oleraceus, Euphorbia maculate,Helianthus annuus, Coronopus didymus, Salsola tragus, Abutilon theophrasti, Vicia benghalensis L., Epilobium paniculatum, Cardamine spp, Picris echioides, Trifolium spp., Galinsoga spp., Epimedium spp., Marchantia spp., Solanum spp., Oxalis spp., Metricaria matriccarioides, Plantago spp., Tribulus terrestris, Salsola kali, Cenchrus spp., Bidens bipinnata, Veronica spp. and Hypochaeris radicala., Particularly preferred examples of dicotyledonous weeds on which the compositions of the invention act effectively are selected from the genera Amaranthus spp., Erigeron spp., Conyza spp., Kochia spp. and Abutilon spp. Depending on the application method in question, the formulations of the invention can additionally be used on a number of crop plants to eliminate unwanted plants. Suitable crops include, for example, the following: 974113 of 39 Allium cepa, Ananas comosus, Arachis hypogaea, Asparagus officinalis, Avena sativa, Beta vulgaris spec. very high, Beta vulgaris spec. turnip, Brassica napus var. turnip, Brassica turnip var. napobrassica, Brassica rapa var. silvestris, Brassica oleracea, Brassica nigra, Camellia sinensis, Carthamus tinctorius, Carya illinoinensis, Citrus limon, Citrus sinensis, Coffea arabica (Coffea canephora, Coffea liberica), Cucumis sativus, Cynodon dactylon, Daucus carota, Elaeis guineensis, Fragaria vesca, Glycine max, Gossypium hirsutum, (Gossypium arboreum, Gossypium herbaceum, Gossypium vitifolium), Helianthus annuus, Hevea brasiliensis, Hordeum vulgare, Humulus lupulus, Ipomoea batatas, Juglans regia, Lens culinaris, Linum usitatissimum, Lycopersicon lycopersicum, Malus spec., Manihot esculenta, Medicago sativa, Musa spec., Nicotiana tabacum (N.rustica), Olea europaea, Oryza sativa, Phaseolus lunatus, Phaseolus vulgaris, Picea abies, Pinus spec., Pistacia vera, Pisum sativum, Prunus avium, Prunus persica, Pyrus communis, Prunus armeniaca, Prunus cerasus, Prunus dulcis and Prunus domestica, Ribes sylvestris, Ricinus communis, Saccharum officinarum, Secale cereale, Sinapis alba, Solanum tuberosum, Sorghum bicolor (s. vulgare), Theobroma cacao, Trifolium pratense, Triticum aestivum, Triticale, Triticum durum, Vicia faba, Vitis vinifera and Zea mays. The preferred crops are Arachis hypogaea, Beta vulgaris spec. altissima, Brassica napus var. napus, Brassica oleracea, Citrus limon, Citrus sinensis, Coffea arabica (Coffea canephora, Coffea liberica), Cynodon dactylon, Glycine max, Gossypium hirsutum, (Gossypium arboreum, Gossypium herbaceum, Gossypium vitifolium), Helianthus annuus, Hordeum vulgare, Juglans regia, Lens culinaris, Linum usitatissimum, Lycopersicon lycopersicum, Malus spec., Medicago sativa, Nicotiana tabacum (N.rustica), Olea europaea, Oryza sativa , Phaseolus lunatus, Phaseolus vulgaris, Pistacia vera, Pisum sativum, Prunus dulcis, Saccharum officinarum, Secale cereale, Solanum tuberosum, Sorghum bicolor (s. vulgare), Triticale, Triticum aestivum, Triticum durum, Vicia faba, Vitis vinifera and Zea mays. Los cultivos de especial preférence son cultivos de cereals, maíz, soja, arroz, colza oleaginosa, algodón, papa, maní or permanent cultivos. Furthermore, the compositions of the invention may also be used in crops that tolerate the effect of herbicides as a result of breeding, including genetic engineering methods. Likewise, the compositions of the invention can also be used in crops that tolerate insect or fungal attack as a result of breeding, including genetic engineering methods. 974113 of 39 The compositions of the invention may also be used in crops that have been modified by mutagenesis or genetic engineering to provide a new trait to a plant or to modify a trait already present. The term “crop” as used herein also includes plants (crops) that have been modified by mutagenesis or genetic engineering in order to provide a new trait to a plant or to modify an existing trait. Mutagenesis includes random mutagenesis techniques using X-rays or mutagenic chemicals, as well as site-directed mutagenesis techniques, which aim to create mutations at a specific locus in a plant genome. Site-directed mutagenesis techniques typically use oligonucleotides or proteins, such as CRISPR / Cas, zinc finger nucleases, TALENs, or meganucleases to achieve the target effect. Genetic engineering typically uses recombinant DNA techniques to create modifications in a plant genome that are not easily obtained under natural circumstances through cross-breeding, mutagenesis, or natural recombination. In general, one or more genes are integrated into a plant genome to add or enhance a trait. These integrated genes are also referred to as transgenes in the prior art, while plants comprising such transgenes are referred to as transgenic plants. The process of plant transformation often produces several transformation events, which differ in the genomic locus at which a transgene was integrated. Plants comprising a specific transgene at a specific genomic locus are often described as comprising a specific “event,” which is indicated by a specific event name.Traits that have been introduced into or modified into plants include, in particular, herbicide tolerance, insect resistance, increased yield, and tolerance to abiotic conditions, e.g., drought. Herbicide tolerance has been created through mutagenesis as well as genetic engineering. Plants that have been made tolerant to acetolactate synthase (ALS) inhibitor herbicides through conventional mutagenesis and breeding methods include plant varieties commercially available under the Clearfield® name. However, most herbicide tolerance traits were created through the use of transgenes. Herbicide tolerance was created for glyphosate, glufosinate, 2,4D, dicamba, oxynil herbicides, such as bromoxynil and ioxynil herbicides, sulfonylurea, ALS inhibitor herbicides, and 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors, such as 974113 of 39 such as isoxaflutole and mesotrione. The transgenes used to provide the herbicide tolerance traits include: for glyphosate tolerance: cp4 epsps, epsps grg23ace5, mepsps, 2mepsps, gat4601, gat4621 and goxv247, for glufosinate tolerance: pat and bar, for 2,4-D tolerance: aad-1 and aad-12, for dicamba tolerance: dmo, for oxynil herbicide tolerance: bxn, for sulfonylurea herbicide tolerance: zmhra, csr1-2, gm-hra, S4-HrA, for ALS inhibitor herbicide tolerance: csr1-2, for HPPD inhibitor herbicide tolerance: hppdPF, W336 and avhppd-03. Transgenic maize events comprising herbicide tolerance genes are, for example, DAS40278, MON801, MON802, MON809, MON810, MON832, MON87411, MON87419, MON87427, MON88017, MON89034, NK603, GA21, MZHG0JG, HCEM485, VCO-01981-5, 676, 678, 680, 33121, 4114, 59122, 98140, Bt10, Bt176, CBH-351, DBT418, DLL25, MS3, MS6, MZIR098, T25, TC1507 and TC6275, among others. Transgenic soybean events comprising herbicide tolerance genes are, for example, GTS 40-3-2, MON87705, MON87708, MON87712, MON87769, MON89788, A2704-12, A2704-21, A5547-127, A5547-35, DP356043, DAS44406-6, DAS68416-4, DAS-81419-2, GU262, SYHT0H2, W62, W98, FG72 and CV127, among others. Transgenic cotton events comprising herbicide tolerance genes include, for example, 19-51a, 31707, 42317, 81910, 281-24-236, 3006-210-23, BXN10211, BXN10215, BXN10222, BXN10224, MON1445, MON1698, MON88701, MON88913, GHB119, GHB614, LLCotton25, T303-3, and T304-40, among others. Transgenic canola events comprising herbicide tolerance genes include, for example, MON88302, HCR-1, HCN10, HCN28, HCN92, MS1, MS8, PHY14, PHY23, PHY35, PHY36, RF1, RF2, and RF3, among others. Insect resistance was primarily created by transferring bacterial genes for insecticidal proteins into plants. The most frequently used transgenes are Bacillus spec. toxin genes and their synthetic variants, such as cry1A, cry1Ab, cry1Ab-Ac, cry1Ac, cry1A.105, cry1F, cry1Fa2, cry2Ab2, cry2Ae, mcry3A, ecry3.1Ab, cry3Bb1, cry34Ab1, cry35Ab1, cry9C, vip3A(a), vip3Aa20. However, genes of plant origin have also been transferred to other plants. In particular, genes encoding protease inhibitors, such as CpTI and pinII. Another approach uses transgenes to produce double-stranded RNA in plants to target and downregulate insect genes. An example for such a transgene is 974113 of 39 dvsnf7. Transgenic maize events comprising genes for insecticidal proteins or double-stranded RNA are, for example, Bt10, Bt11, Bt176, MON801, MON802, MON809, MON810, MON863, MON87411, MON88017, MON89034, 33121, 4114, 5307, 59122, TC1507, TC6275, CBH-351, MIR162, DBT418 and MZIR098, among others. Transgenic soybean events comprising genes for insecticidal proteins include, for example, MON87701, MON87751, and DAS-81419, among others. Transgenic cotton events comprising genes for insecticidal proteins are, for example, SGK321, MON531, MON757, MON1076, MON15985, 31707, 31803, 31807, 31808, 42317, BNLA-601, Event1, COT67B, COT102, T303-3, T304-40, GFM Cry1A, GK12, MLS 9124, 281-24-236, 3006-210-23, GHB119 and SGK321, among others. Higher yields were generated by increasing ear biomass using the athb17 transgene, which is present in the MON87403 maize event, or by improving photosynthesis using the bbx32 transgene, which is present in the MON87712 soybean event. Cultivars comprising modified oil content were generated using the transgenes: gm-fad2-1, Pj.D6D, Nc.Fad3, fad2-1A, and fatb1-A. Soybean events comprising at least one of these genes are: 260-05, MON87705, and MON87769. Tolerance to abiotic conditions, in particular drought tolerance, was generated using the cspB transgene, contained in the maize event MON87460, and using the Hahb-4 transgene, contained in the soybean event IND-00410-5. Traits are frequently mixed by combining genes in a transformation event or by combining different events during the breeding process. The preferred combination of traits is herbicide tolerance for different groups of herbicides, insect tolerance for different classes of insects, particularly tolerance to lepidopteran and coleopteran insects, herbicide tolerance with one or more types of insect resistance, herbicide tolerance with increased yield, and a combination of herbicide tolerance and tolerance to abiotic conditions. Plants comprising single or stacked traits, as well as the genes and events that provide these traits, are known in the state of the art. For example, detailed information on mutagenized or integrated genes and 974113 of 39 the respective events are available from the websites of the organizations “International Service for the Acquisition of Agri-biotech Applications (ISAAA)” (http: / / www.isaaa.org / gmapprovaldatabase) and “Center for Environmental Risk Assessment (CERA)” (http: / / cera-gmc.org / GMCropDatabase), as well as in patent applications, such as EP3028573 and WO2017 / 011288. The use of the compounds of Formula (I) or the formulations or combinations comprising them according to the invention in crops can produce effects specific to a crop comprising a certain gene or event. These effects may include changes in growth behavior or changes in resistance to biotic or abiotic stress factors. Such effects may comprise, in particular, improved yield, improved resistance or tolerance to insects, nematodes, fungal, bacterial, viral, viroid or mycoplasma pathogens, as well as early vigor, early or late ripening, cold or heat tolerance, as well as changes in the spectrum or content of amino acids or fatty acids. Furthermore, plants containing, thanks to the use of recombinant DNA techniques, a modified amount of ingredients or new ingredients are also included, specifically to improve the production of raw material, for example, potatoes that produce a higher amount of amylopectin (e.g. Amflora® potato, BASF SE, Germany). Furthermore, it was discovered that the compositions of the invention are also suitable for defoliating and / or desiccating plant parts of crops, such as cotton, potato, oilseed rape, sunflower, soybean, or field beans, in particular cotton. In this regard, formulations and / or combinations for desiccating and / or defoliating crops, processes for preparing these formulations and / or combinations, and methods for desiccating and / or defoliating plants using the compositions of the invention were discovered. As desiccants, the compositions of the invention are particularly suitable for drying the above-ground parts of crop plants, such as potatoes, oilseed rape, sunflowers, and soybeans, but also cereals. This enables the fully mechanical harvesting of these important crop plants. From an economic point of view, it is also interesting to facilitate harvesting, which is made possible by concentrating dehiscence or the reduction of adhesion to the tree in a certain period, in citrus fruits, olives and other species and varieties of harmful fruits, stone fruits and nuts. The same mechanism, i.e., the promotion of the development of abscission tissue between the part of the 974113 of 39 fruit or the leaf part and the shoot part of plants, it is also essential for the controlled defoliation of useful plants, in particular, cotton. Furthermore, shortening the time interval during which individual cotton plants mature results in higher fiber quality after harvest. Furthermore, it was found that the compositions of the invention are also suitable for the control of conifers, in particular, naturally growing conifer seedlings and, specifically, for the control of naturally growing pine seedlings. In general, the compositions of the invention as described herein are useful for combating unwanted vegetation. For this purpose, the compositions can be applied as is or preferably after dilution with water. Preferably, for various end-user application purposes, an aqueous spray liquor is prepared by diluting the compositions of the present invention with water, for example, tap water.The spray liquors may also comprise additional constituents in dissolved, emulsified, or suspended form, for example fertilizers, active ingredients from other herbicidal or growth-regulating active ingredient groups, additional active ingredients, for example, active ingredients for the control of animal pests or phytopathogenic bacteria or fungi; also mineral salts used to reduce nutritional and trace element deficiencies, and non-phytotoxic oils or oil concentrates. In general, these constituents are added to the spray mixture before, during, or after dilution of the compositions according to the invention. The compositions of the invention may be applied by either the pre-emergence or post-emergence method. If saflufenacil is less tolerated by certain crop plants, application techniques may be used in which the herbicidal compositions are sprayed, with the aid of spraying apparatus, in such a manner that the leaves of sensitive crop plants ideally do not come into contact with said compositions, while the active ingredients reach the leaves of undesired plants growing below, or the bare soil surface (post-directed, lay-by). Depending on the objective of the control measures, the season, the target plants and the growth stage, the compositions of the invention are applied at a degree such that the application rates of saflufenacil are from 0.001 to 3.0, preferably from 0.01 to 974113 of 39 1.0 kg / ha of active substance (as). To broaden the spectrum of action and to obtain synergistic effects, the compositions of the invention can be mixed with a large number of representatives of other groups of herbicidal or growth-regulating active ingredients and applied together with them. Examples of suitable mixture components are 1,2,4-thiadiazoles, 1,3,4-thiadiazoles, amides, aminophosphoric acid and its derivatives, aminotriazoles, anilides, aryloxy / heteroaryloxyalkanoic acids and their derivatives, benzoic acid and its derivatives, benzothia diazinones, 2-(hetaroyl / aroyl)-1,3-cyclohexanediones, heteroarylaryl ketones, benzyl isoxazolidinones, meta-CF3-phenyl derivatives, carbamates, quinolinecarboxylic acid and its derivatives, chloroacetanilides, cyclohexenone oxime ether derivatives, diazines, dichloropropionic acid and its derivatives, dihydrobenzofurans, dihydrofuran-3-ones, dinitroanilines, dinitrophenols, diphenyl ethers, dipyridyls, halocarboxylic acids and their derivatives, ureas, 3-phenyluracils, imidazoles, imidazolinones, N-phenyl-3,4,5,6-tetrahydrophthalimides, oxadiazoles, oxiranes, phenols, aryloxy- and heteroaryloxyphenoxypropionic acid esters, phenylacetic acid and its derivatives, 2-phenylpropionic acid and its derivatives, pyrazoles, phenylpyrazoles,pyridazines, pyridinecarboxylic acid and its derivatives, pyrimidyl ethers, sulfonamides, sulfonylureas, triazines, triazinones, triazolinones, triazolecarboxamides and uracils. The compositions of the present invention may also be used as tank mix components with other formulations. Thus, the compositions of the invention may be mixed and applied together with a wide variety of different pesticidal compound formulations, for example, those including active ingredients or adjuvants, such as atrazine, glyphosate, glufosinate, S-metolachlor, 2,4-D ester, isoxaflutole, diflufenzopyr, dicamba, mesotrione, dimethenamid-P, pendimethalin, imazethapyr, paraffin oils, polyol fatty acid esters, polyethoxylated polyol fatty acid esters, ethoxylated alkyl aryl phosphates, methylated seed oils, emulsifiers, ammonium sulfate, or mixtures thereof. Furthermore, it may be useful to apply the compositions containing saflufenacil of the invention, separately or in combination with other herbicides, together as a mixture with additional plant protection agents, for example, with agents for the control of pests, bacteria or phytopathogenic fungi. Also of interest is the miscibility with mineral salt solutions, which are used to reduce nutritional and 974113 of 39 trace elements. In addition, non-phytotoxic oils and oil concentrates can be added. The present invention offers the following advantages: It is easy and economical to carry out. The compositions according to the invention are compatible with a wide range of other pesticides and formulations thereof, in particular herbicides with a water solubility of at least 1 g / l, such as auxins, bentazone, diquat and paraquat and their formulations. In particular, compatibility is achieved with dicamba, glyphosate, glufosinate, MCPA, 2,4-dichlorophenoxyacetic acid, 2,4,5-trichlorophenoxyacetic acid, bentazone, diquat and paraquat and their formulations. The compositions according to the invention show high chemical and physical stability over prolonged storage periods while maintaining their biological efficacy. When diluted with water, the compositions according to the invention provide stable aqueous saflufenacil compositions and form little or no thick material or supernatant. The following examples are intended to illustrate the present invention and are not intended to limit its scope in any way. EXAMPLES I. Analysis: The particle size distribution (PSD) was determined by static laser scattering using a Malvern Mastersizer 200 in accordance with European regulation ISO 13320 EN. The data were processed according to Mie theory by software, using a "universal model" provided by Malvern Instruments. Important parameters are the dn values ​​for n = 10, 50, and 90, the d10, d50, and d90 values. The solids content of the final dispersion was measured by evaporating the small-probe volatiles from the aqueous suspension in an oven at 105 °C for 2 hours. The value indicated for the examples is an average of three parallel experiments. II. Ingredients: Foam remover 1: Silicone oil emulsion based foam remover Foam remover 2: antifoam emulsion comprising polydimethylsiloxane Biocide 1: aqueous biocidal formulation comprising methylisothiazolinone and 974113 39 chlormethylisothiazolinone Biocide 2: glycol-based biocidal formulation comprising benzisothiazolinone Biocide 3: Biocidal formulation comprising 2-bromo-2-nitropropan-1,3-diol Xanthan gum Adjuvant 1: Methylated seed oil, ethoxylated alkylphenol Nonionic surfactant 1: Nonionic surfactant comprising alkoxylated tristyrylphenol Nonionic surfactant 2: PEO-PPO-PEO type nonionic surfactant, Mw of the block PPO 3250 g / mol, percentage of polyethylene glycol in molecule 50% by weight Anionic surfactant A1-1: Sodium lignosulfonate, see Table 1 Anionic surfactant A1-2: Sodium lignosulfonate, see Table 1 Anionic surfactant A1-3: lignin, sulfomethylated, see Table 1 Anionic surfactant A1-4: Sodium lignosulfonate, see Table 1 Anionic surfactant A1-5: Sodium lignosulfonate, see Table 1 Surfactant A2-1: 20% aqueous solution of poly(2-acrylamido-2-methylpropanesulfonic acid), sodium salt with pH 2.5-4; (CAS 55141-01-0 or 35641-59-9) Precondensate P1: 70% w / w aqueous solution of etherified melamine formaldehyde precondensate, CAS 68002-20-0 Roundup®Powermax II herbicide: commercially available aqueous solution of glyphosate potassium, containing 540 grams of glyphosate per liter (calculated as glyphosate acid) Engenia® herbicide: commercially available aqueous solution of dicamba N,N,bis-(3-aminopylamin)methylamine salt, containing 600 grams of glyphosate per liter (calculated as dicamba acid) Roundup WeatherMAX herbicide: commercially available aqueous solution of glyphosate potassium, containing 540 grams of glyphosate per liter (calculated as glyphosate acid) Honcho®plus herbicide: commercially available aqueous solution of the isopropylammonium salt of glyphosate, containing 356 grams of glyphosate per liter (calculated as glyphosate acid) III. Preparation of the compositions of the invention: a) Suspension premix 4.1 kg of saflufenacil tgai (97.5% purity) was subjected to microsphere milling in an aqueous phase containing 80 g of sodium lauryl sulfate, 8.0 g of biocide 1, 16.0 g of biocide 2 and 6.4 g of biocide 3, respectively, 4.0 g of foam remover 1, 4.5 g of citric acid and 3.78 kg of water until the microsphere size was reached. 974113 of the 39 particle size range achieved a d50 of 1.1 pm according to static laser scattering. (Equipment: Malvern 3000, software: V3.63, scattering model: Fraunhofer, analysis model: Universal) b) Premix in capsules 280 g of the above suspension premix were mixed with 52 g of a 20% by weight surfactant solution A2-1, then 59 g of precondensate P1 and finally 32 g of a 10% by weight aqueous citric acid solution. This premix was heated to +80 °C after stirring, kept at +80 °C for 2 hours, then cooled to room temperature. A microcapsule suspension with d50 = 4.6 pm was obtained (Equipment: Malvern 3000, software: V3.63, dispersion model: Fraunhofer, analysis model: universal) c) Capsule formulation To 10 g of the above capsule premix was added 0.5 g of polymeric surfactant according to the following table, and the suspension was equilibrated by stirring for 30 minutes. Five stabilized capsule formulations, CS1 to CS5, were obtained. Table 1: Properties of anionic surfactants A1-1 to A1-5 Example Dispersing agent Mw [g / mol] Degree of sulfonation [mol SO3 / kg lignosulfonate] Inventive / Comparison CS1 Anionic surfactant A1-1 43,000 1.9 Inventive CS2 Anionic surfactant A1-2 65,000 1.7 Inventive CS3 Anionic surfactant A1-3 10,200 1.5 Inventive CS4 Anionic surfactant A1-4 3,100 2.9 Comparison CS5 Anionic surfactant A1-5 6,200 0.7 Comparison d) Miscibility tests To simulate tank mixing by a grower, 0.7 g of each of CS1 to CS5 above was dispersed in 100 ml of CIPAC D water, then 2.1 ml of Roundup Powermax II herbicide was added, stirred, and the mixture was allowed to age for 24 hours. The fluid was then poured onto a 150 µm sieve, and the residue left on the sieve was visually assessed. 974113 of 39 Capsule formulation Sieve residues Conclusion CS1 Trace miscible with glyphosate, applicable CS2 Not at all miscible with glyphosate, applicable CS3 Trace miscible with glyphosate, applicable CS4 Large residue Incompatible with glyphosate, not applicable CS5 Large residue Incompatible with glyphosate, not applicable e) Final confirmation of compatibility CS6 Capsule Formulation: 700 g of the capsule premix described in paragraph b) were finished with 1.6 g of biocide 2, 0.6 g of biocide 3, 0.8 g of biocide 1, 4.2 g of foam remover 2, 25 g of nonionic surfactant 2, 50 g of anionic surfactant A1-3, 2.5 g of xanthan gum, 35 g of ammonium acetate, 24 g of 25% aqueous ammonia and 260 g of water to form saflufenacil formulation CS6. Formulation CS6 was dispersed in 100 g of CIPAC D water, and test additives were added according to the following table. The aqueous suspensions were then allowed to age for 2 hours and finally poured onto a 150 µm sieve. Again, the residue remaining on the sieve was assessed visually. Execution CS6 [g] Additive 1 [g] Additive 2 [g] Sieve residue 1 0.7 Herbicide Roundup Powermax II 3.2 - - traces 2 0.7 Herbicide Roundup Powermax II 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 3 0.7 Herbicide Engenia 1.2 - - traces 4 0.7 Herbicide Engenia 1.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 none 5 1.0 Herbicide Roundup WeatherMAX 3.2 - - none 6 1.0 Herbicide Roundup WeatherMAX 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 none 7 1.0 Herbicide Honcho plus 4.1 - - none 8 1.0 Herbicide Honcho plus 4.1 Adjuvant 1 (NH4)2SO4 0.9 1.0 none f) CS7 capsule formulation: 700 g of the capsule premix described in paragraph b) were finished with 1.6 g of biocide 2, 0.6 g of biocide 3, 0.8 g of biocide 1, 4.2 g of foam remover 2, 25 g of non-ionic surfactant 1, 50 g of anionic surfactant A1-2, 2.5 g of xanthan gum, 35 g of ammonium acetate, 24 g of 25% aqueous ammonia and 260 36 974113 of 39 g of water to form the saflufenacil CS7 formulation. Formulation CS7 was dispersed in 100g of CIPAC D water, and test additives were added according to the following table. The aqueous suspensions were then allowed to age for 2 hours and finally poured onto a 150 µm sieve. Again, the residue remaining on the sieve was assessed visually. Execution CS7 [g] Additive 1 [g] Additive 2 [g] Sieve residue 1 0.7 Herbicide Roundup Powermax II 3.2 - - none 2 0.7 Herbicide Roundup Powermax II 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 3 0.7 Herbicide Engenia 1.2 - - traces 4 0.7 Herbicide Engenia 1.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 none 5 1.0 Herbicide Roundup WeatherMAX 3.2 - - none 6 1.0 Herbicide Roundup WeatherMAX 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 none 7 1.0 Herbicide Honcho plus 4.1 - - traces 8 1.0 Herbicide Honcho plus 4.1 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces g) CS8 capsule formulation: 700 g of the capsule premix described in paragraph b) were finished with 1.6 g of biocide 2, 0.6 g of biocide 3, 0.8 g of biocide 1, 4.2 g of foam remover 2, 25 g of nonionic surfactant 2, 50 g of anionic surfactant A1-1, 2.5 g of xanthan gum, 35 g of ammonium acetate, 24 g of 25% aqueous ammonia and 260 g of water to form saflufenacil formulation CS8. Formulation CS8 was dispersed in 100g of CIPAC D water, and test additives were added according to the following table. The aqueous suspensions were then allowed to age for 2 hours and finally poured onto a 150 µm sieve. Again, the residue remaining on the sieve was assessed visually. Execution CS8 [g] Additive 1 [g] Additive 2 [g] Sieve residue 1 0.7 Herbicide Roundup Powermax II 3.2 - - traces 2 0.7 Herbicide Roundup Powermax II 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 3 0.7 Herbicide Engenia 1.2 - - none 4 0.7 Herbicide Engenia 1.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 974113 of 39 5 1.0 Roundup WeatherMAX Herbicide 3.2 - - none 6 1.0 Roundup WeatherMAX Herbicide 3.2 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 7 1.0 Honcho plus Herbicide 4.1 - - traces 8 1.0 Honcho plus Herbicide 4.1 Adjuvant 1 (NH4)2SO4 0.9 1.0 traces 974113 of 39 Federico Aulmann - 20219535830 Digitally signed by PORTALTRAM ITES - INPI Date: 2020.06.05 16:18:45 -03:00 Reason: Digitally signed by the INPI Location: Buenos Aires, Argentina 974113

Claims

1. A microparticle composition comprising saflufenacil, characterized in that saflufenacil is present in the form of microparticles comprising solid saflufenacil surrounded or enveloped by an aminoplastic polymer, which is a product of the polycondensation of amino and aldehyde compounds, and which also comprises a lignin-based sulfonic acid A, wherein said lignosulfonic acid A has an average molar weight (MW) of 10,000 Da and a degree of sulfonation of 1.0 to 2.5 mol per kilogram of said lignosulfonic acid A, and wherein the aminoplastic polymer is a melamine-formaldehyde resin. 15 Claims follow