Repellents and repellent methods

Abstract

To provide a repellent that can be installed in a space and has a repellent effect against both centipedes and millipedes. [Solution] A repellent for centipedes and millipedes, characterized in that it contains at least one active ingredient selected from the group consisting of rosemary oil, tea tree oil, menthone, 1,8-cineole, cinnamic aldehyde, eugenol, acetic acid, limonene, thujone, methyl salicylate, and hexanal, and is used by volatilizing the active ingredient into space.

Description

[Technical Field]

[0001] The present invention relates to a repellent and a repellent method, and more particularly to a repellent and a repellent method for repelling centipedes and millipedes. [Background technology]

[0002] Centipedes and millipedes are targets for control because they are unpleasant to look at and contain poison that can cause swelling and other harm to the human body when bitten. For this reason, various studies have been conducted on the application of various essential oils as repellents.

[0003] For example, Patent Document 1 proposes a powder for controlling crawling pests, which is composed of a mineral carrier containing cyfluthrin as a pyrethroid insecticidal ingredient, cinnamon powder prepared from a plant as a repellent ingredient for crawling pests, and dipropylene glycol and / or tripropylene glycol. Patent Document 2 also proposes a repellent for at least one of myriapods and cockroaches, which is a solution having a pH of 8.8 to 12 and containing an inorganic salt as a pH adjuster in an amount effective to adjust the pH to the range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-112773 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-113418 Summary of the Invention [Problem to be solved by the invention]

[0005] Although natural essential oils and single components that have a repellent effect against pests have been reported, there are a wide variety of pests, including centipedes, millipedes, stink bugs, pill bugs, ants, etc. The ecology of each type of pest varies greatly, and it is unclear how effective a repellent component will be against each pest.

[0006] For example, Patent Document 1 discloses that centipedes and millipedes, along with cockroaches, mites, and ants, are pests that can be effectively controlled by dusting such a creeping pest control powder. However, the control effect has only been confirmed for the black mountain ant, and it is unclear whether the control effect is also shown for other pests.

[0007] In the present invention, attention is focused on centipedes, which are particularly aggressive among pests and bite the moment they come into contact with something, and millipedes, which give off an unpleasant odor; however, repelling centipedes does not repel millipedes, and vice versa; the same repellent component does not necessarily have a repellent effect on both centipedes and millipedes.

[0008] Furthermore, there are various types of pest repellents, such as spray type, dusting type, powder type, and installation type, but in the case of installation type in particular, the repellent is required to be composed of safe ingredients that have little effect on the human body.

[0009] Therefore, an object of the present invention is to provide a repellent and a repellent method that can be installed in a space and that can provide a repellent effect against both centipedes and millipedes. [Means for solving the problem]

[0010] As a result of extensive research to solve the above problems, the present inventors discovered that a specific component has a repellent effect against both centipedes and millipedes, and thus completed the present invention. That is, the object of the present invention is achieved by the following [1] to [3]. [1] A repellent for centipedes and millipedes, which contains at least one active ingredient selected from the group consisting of rosemary oil, tea tree oil, menthone, 1,8-cineole, cinnamic aldehyde, eugenol, acetic acid, limonene, thujone, methyl salicylate, and hexanal, and is used by volatilizing the active ingredient into space. [2] The space for volatilization is 1m 3 The repellent according to [1] above, characterized in that the total content of the active ingredients is 40 mg to 50 g per unit area. [3] A method for repelling centipedes and millipedes, comprising placing the repellent described in [1] or [2] in a space and volatilizing the active ingredient in the repellent in the space, thereby repelling centipedes and millipedes. [Effects of the Invention]

[0011] The repellent according to the present invention has a repellent effect against both centipedes and millipedes. Furthermore, since the active ingredient of the repellent is a safe ingredient that has little effect on the human body, it can be placed in a space. Similarly, in the repellent method according to the present invention, a repellent agent is placed in a space and the active ingredient is vaporized in the space, thereby achieving a repellent effect against both centipedes and millipedes. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Repellent> The target pests of the repellent according to this embodiment are centipedes and millipedes. The repellent contains at least one active ingredient selected from the group consisting of rosemary oil, tea tree oil, menthone, 1,8-cineole, cinnamic aldehyde, eugenol, acetic acid, limonene, thujone, methyl salicylate, and hexanal, and is used by volatilizing the active ingredient into space.

[0013] All of the above active ingredients are safe ingredients that have little effect on the human body. Since the active ingredients naturally volatilize at room temperature (normal temperature), simply placing the repellent according to this embodiment in a space will cause the active ingredients to volatilize in the space, thereby achieving a repellent effect against both centipedes and millipedes. The active ingredients may also be volatilized in the space by applying external energy such as heat or wind to the repellent. When heat or wind is used to volatilize the active ingredients, the volatilization rate is easy to control. All of the above active ingredients are in a liquid state at room temperature, and may also serve as liquid carriers, solvents, or other functions in addition to the active ingredient for repellency.

[0014] Among the active ingredients, rosemary oil is a pale green liquid essential oil obtained by distilling the leaves and flowers of rosemary (scientific name: Rosmarinus officinalis), an evergreen shrub of the Lamiaceae family that is widely distributed in Mediterranean countries. Examples of rosemary oil in this embodiment include rosemary cineole, rosemary verbenone, and rosemary camphor.

[0015] Tea tree oil is a colorless to pale yellow fragrant essential oil obtained from the tea tree (scientific name: Melaleuca alternifolia), a plant of the Myrtaceae family that grows in the wetlands of Australia. Examples of tea tree oil in this embodiment include essential oils obtained from plants belonging to the Myrtaceae family genera Leptospermum, Lamium, Melaleuca, Brassica, Calothamnus, and Osoburnia.

[0016] Menthone, the compound (2S,5R)-trans-2-isopropyl-5-methylcyclohexan-1-one, is a clear, colorless to slightly pale yellow liquid. It is also found in essential oils such as pennyroyal, peppermint, and geranium.

[0017] 1,8-cineole is a colorless to pale yellow, clear liquid compound found in the essential oils of Eucalyptus plants such as E. polybractea. It can also be extracted from the leaves of bay leaves, mugwort, basil, artemisia absinth, rosemary, and sage.

[0018] Cinnamic aldehyde is a pale yellow, viscous liquid compound, and is one of the components contained in the essential oil of the bark of Cinnamomum trees, such as cinnamon.

[0019] Eugenol is a colorless to pale yellow oily liquid compound, and is also contained in clove essential oil, as well as essential oils such as pimento, bay leaf, and cinnamon.

[0020] Acetic acid is a colorless liquid compound and is also a component found in vinegar.

[0021] Limonene is a typical monocyclic monoterpene found in the peels of citrus fruits and is a colorless, transparent liquid compound. It exists in d-, l-, and racemic forms, and the limonene referred to in this specification may be any of these forms or a mixture thereof.

[0022] Thujone is a colorless liquid compound and a component of essential oils such as wormwood, mugwort, and sage. There are α and β isomers, which differ in the methyl group content, and thujone in this specification may refer to either of these isomers or a mixture of these.

[0023] Methyl salicylate is a colorless, oily liquid compound, and is also found in plants such as Betulaceae (Betulaceae), Gaultheria japonica (Ericaceae), and Prunella japonica.

[0024] Hexanal is a colorless liquid compound that is also found in soybeans and other foods.

[0025] The active ingredient in this embodiment may be one or more of the above. From the viewpoint of high repellent effect against centipedes and millipedes, the active ingredient is preferably at least one selected from the group consisting of rosemary oil, 1,8-cineole, acetic acid, thujone and methyl salicylate, more preferably at least one selected from the group consisting of rosemary oil, 1,8-cineole, acetic acid and thujone, and even more preferably at least one selected from the group consisting of rosemary oil, 1,8-cineole and acetic acid.

[0026] The content of the active ingredient in the repellent according to this embodiment varies depending on the scale of the repellent itself and the size of the space in which the repellent is installed. 3 From the viewpoint of effectively obtaining a repellent effect against centipedes and millipedes, the total content of the active ingredients is preferably 40 mg or more, more preferably 80 mg or more, and even more preferably 100 mg or more. Furthermore, from the viewpoint of preventing humans from perceiving the scent of the repellent as an irritating odor, the total content of the active ingredients is preferably 50 g or less, more preferably 10 g or less, and even more preferably 2 g or less. Strictly speaking, the optimum content varies depending on the type of active ingredient used, but it is preferable if it is within the above range regardless of the type of active ingredient.

[0027] The repellent according to the present embodiment can be used as various formulations, and the form does not matter as long as it can be placed in a space, but examples include liquid, gel, sol, granule, powder, tablet, sheet, etc. Among these, liquid, gel, and sheet formulations are more preferred from the viewpoint of indoor use.

[0028] The repellent according to this embodiment may consist of only the active ingredient, or may contain other ingredients in addition to the active ingredient when formulated, as long as the effects of the present invention are not impaired. When a formulation is made using a carrier or the like as another ingredient, examples of the method include mixing the active ingredient with a solid carrier or a liquid carrier, impregnating the active ingredient into a solid carrier, and mixing the active ingredient with a solid carrier followed by molding and processing.

[0029] Examples of solid carriers include mineral powders such as talc, rosewood, kaolin, calcium carbonate, bentonite, silica stone, feldspar, hydrous silicon dioxide, acid clay, diatomaceous earth powder, and pumice powder; animal powders such as wood flour, corn starch, and silk powder; sugars such as glucose, sucrose, and lactose; and inorganic salts such as sodium carbonate, sodium sulfate, potassium chloride, ammonium sulfate, ammonium nitrate, and ammonium phosphate. Among these, mineral powders are preferred, and talc, clay, silica stone, feldspar, and kaolin are more preferred, from the viewpoint of being less likely to scatter and not dissolving in water, etc. One or more of these solid carriers can be used.

[0030] The liquid carrier may be, for example, water, alcohol, hydrocarbon, or the like, and may also be a gel-like liquid containing a thickening polymer compound or an emulsion containing a surfactant. Among these, a gel-like liquid containing a thickening polymer compound is preferred from the viewpoint of easily controlling the amount of evaporation and maintaining the repellent effect. However, if the liquid carrier contains an active ingredient of this embodiment, the active ingredient contained in the liquid carrier is also included in the total content of the active ingredient of this embodiment. These liquid carriers can be used alone or in combination. After the active ingredient in this embodiment is mixed with the liquid carrier, the mixture may be solidified using a gelling agent or impregnated into a water-absorbent polymer.

[0031] Examples of the other components other than the carrier include solvents, surfactants, UV absorbers, antioxidants, fragrances, colorants, water repellents, preservatives, pH adjusters, oils, thickeners, and spreading agents.

[0032] Examples of solvents include water, alcohols, esters, ketones, ethers, hydrocarbons, and aromatic compounds. However, when the solvent contains the active ingredient of the present embodiment, the active ingredient contained in the solvent is also included in the total content of the active ingredient of the present embodiment. When the solvent is not the active ingredient of the repellent, isopropyl myristate, dioctyl sebacate, propylene glycol, and the like are more preferred solvents from the viewpoint of suppressing the amount of volatilization of the active ingredient and extending the duration of the effect.

[0033] Examples of surfactants include alkyl sulfates, alkyl sulfonates, alkylaryl sulfonates, alkylaryl ethers, polyoxyethylenated alkylaryl ethers, polyethylene glycol ethers, and polyhydric alcohol esters.

[0034] Examples of ultraviolet absorbers include benzophenones such as 2,4-dihydroxybenzophenone, and benzotriazoles such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole.

[0035] Examples of antioxidants include butylhydroxyanisole, dibutylhydroxytoluene, tocopherol, γ-oryzanol, and ascorbic acid.

[0036] Examples of fragrances include essential oils such as rose oil, lavender oil, bergamot oil, cinnamon oil, citronella oil, lemon oil, and peppermint oil, aromatic substances such as pinene, linalool, menthol, citral, citronellal, vanillin, and borneol, glycosides thereof, natural fragrances, synthetic fragrances, and blended fragrances. However, when the fragrance contains an active ingredient in this embodiment, the active ingredient contained in the fragrance is also included in the total content of the active ingredient in this embodiment.

[0037] Examples of coloring agents include legally designated dyes such as Blue No. 1, Green No. 202, and Purple No. 201, and natural dyes such as riboflavin and chlorophyll.

[0038] The water repellent agent may be, for example, silicone oil.

[0039] Examples of preservatives include phenoxyethanol, benzyl alcohol, parabens, and quaternary ammonium salts.

[0040] Examples of pH adjusters include citric acid, phosphoric acid, sodium carbonate, sodium bicarbonate, and succinic acid.

[0041] Examples of oils include silicone oils, vegetable oils, animal oils, synthetic oils, petroleum oils, etc. However, when the oil contains the active ingredient of the present embodiment, the active ingredient contained in the oil is also included in the total content of the active ingredient of the present embodiment.

[0042] Examples of thickeners include water-soluble polymer compounds such as xanthan gum and carboxymethyl cellulose, and clay minerals such as bentonite.

[0043] Examples of the spreading agent include polyoxyethylene nonylphenyl ether and polyoxyethylene lauryl ether.

[0044] The location where the repellent is installed is preferably indoors, rather than in an open space such as outdoors, so that the airborne concentration of the volatilized active ingredient is at or above the concentration at which the repellent is effective. Specific examples include places that could serve as entry routes from the outside, such as entrances and window sills, places close to places that centipedes and millipedes like storage rooms, and living spaces such as bedrooms, living rooms, bathrooms, washrooms, and toilets. Other examples include places where centipedes tend to hide, such as shoeboxes, under kitchen sinks, closets, storage areas, and spaces under furniture. By installing the repellent according to this embodiment in such a location, the active ingredient volatilizes into the space, exerting a repellent effect against both centipedes and millipedes.

[0045] The repellent according to this embodiment is targeted at centipedes and millipedes, and examples of centipedes include the Japanese giant centipede, the blue giant centipede, the Japanese giant centipede, the Japanese giant centipede, etc. Examples of millipedes include the Japanese giant centipede, the Japanese burnt millipede, and the Japanese red millipede.

[0046] <Repellent method> The target pests of the repellent method according to this embodiment are centipedes and millipedes, and the method is characterized in that a repellent containing an active ingredient is placed in a space, and the active ingredient is vaporized in the space. The repellent is the same as that described above in the <Repellent>, and the preferred embodiments are also the same.

[0047] In the repellent method according to this embodiment, when the repellent is placed in a space and the active ingredient is volatilized into the space, the total air concentration of the active ingredient is 40 mg / m from the viewpoint of effectively obtaining a repellent effect against centipedes and millipedes. 3More than 80 mg / m 3 More preferably, 100 mg / m or more 3 Furthermore, from the viewpoint of preventing humans from perceiving the scent of the repellent as an irritating odor, the concentration in the air is more preferably 50 g / m or more. 3 Less than 10 g / m is preferred 3 Less than 2g / m is more preferable. 3 The following is even more preferred:

[0048] The total concentration of the active ingredient in the air is affected by the airtightness of the space where the repellent is installed, room temperature, humidity, etc. As a guideline, for a repellent, the volatilization space of 1 m 3 If the total content of active ingredients in a container is about 40 mg, the total concentration of active ingredients in the air is 40 mg / m 3 If the content is about 50g, the concentration in the air is about 50g / m 3 It will be about that amount.

[0049] There are no particular limitations on the method for actually measuring the airborne concentration, but for example, the gas in the space where the repellent is installed can be collected and analyzed using gas chromatography, liquid chromatography, etc. When collecting the gas, collect the gas from a position about 1 cm away from the installed repellent, or from an entry route for centipedes and millipedes or a place where you do not want them to enter. The air concentration may be measured using the method described in the "Guidelines for measuring indoor air concentrations of insecticides as over-the-counter drugs and quasi-drugs." [Example]

[0050] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples in any way.

[0051] <Examples 1-1 to 1-11 and Comparative Examples 1-1 to 1-19> The test specimen was prepared by impregnating the tip of a 1 cm x 5 cm filter paper with 5 μL of the active ingredient listed in Table 1. The test specimen was brought close to a location approximately 1 cm away from the antennae of the test insect, and the reaction of the test insect was observed for up to 30 seconds. This is the volatilization space of 1m 3 The amount of active ingredient per unit is equivalent to approximately 150 mg. The test insects used were the centipede, the Japanese stag beetle, and the millipede, the Japanese millipede. The evaluation criteria are as follows: 5. When the test specimen was brought closer, the test insect made a U-turn. 4 When the test specimen was brought close, the test insect responded with its antennae and stopped in place. 3. When the test sample was brought close, the antennae of the test insects reacted to the active ingredient by wiggling for more than 5 seconds. 2 When the test sample was brought close, the antennae of the test insects reacted to the active ingredient by wiggling for less than 5 seconds. 1 The test insects did not react when the test specimen was brought close. The results are shown in Table 1. If the test insects, the sand dollar and the millipede, both had results of 2 or higher, it was considered a repellent effect, which is preferable, with both being 3 or higher being more preferable, both being 4 or higher being even more preferable, and one being 4 or higher and the other being 5 being particularly preferable.

[0052] [Table 1]

[0053] <Examples 2-1 to 2-7 and Comparative Example 2-1> A Tedlar® bag with a volume of 10 L or 200 L was prepared, and a glass petri dish containing 1,8-cineole as the active ingredient was placed inside the bag so that the airborne concentration was as shown in Table 2. The bag was then filled with air and the opening was closed. The bag was then left for 12 hours to allow the active ingredient to naturally volatilize into the air. Next, after confirming that the entire amount of the active ingredient had evaporated into the air, the air in the Tedlar® bag was applied to test insects as test specimens, and the reaction of the test insects was observed. The test insects used were centipedes, such as the Japanese buckthorn, and millipedes, such as the Japanese giant millipede. The evaluation criteria are as follows, and the results are shown in "Repellent effect" in Table 2. ◎: The test insect made a U-turn or left the area within 5 seconds of the test specimen being approached. ○: The test insect made a U-turn or left the area within 10 seconds of the test specimen being approached. △: The antennae of the test insect reacted for more than 5 seconds after the test specimen was brought close. ×: The test insects showed no reaction even when the test specimen was brought close.

[0054] [Table 2]

[0055] From the results in Table 1, it was found that a repellent containing the active ingredient of this embodiment exhibits a repellent effect against centipedes and millipedes. Furthermore, p-menthane of Comparative Example 1-14, which has a similar structure to menthone of Example 1-1 but does not have a ketone group, showed the same repellent effect against centipedes as menthone of Example 1-1, but showed no repellent effect against millipedes at all.

[0056] From the results in Table 2, the air concentration of the active ingredient is, for example, 3 It was confirmed that a repellent effect was observed even at a low concentration of around 40 mg / m. The higher the concentration in the air, the stronger the repellent effect was, and even at 5 g / m 3 At these concentrations, no significant difference in effect was observed. Myriapods such as centipedes and millipedes are pests that invade indoors from outdoors, entering through gaps in entranceways and windows. They then invade living environments such as bedrooms, and centipedes in particular can bite humans. In contrast, the results of this test showed that if an airborne concentration of active ingredients that has a repellent effect is present in the air along the entry routes of centipedes and millipedes or in areas where they are not desired, it may be possible to repel myriapods such as centipedes and millipedes.

[0057] Furthermore, it was found that the active ingredients of Comparative Examples 1-3, 1-7 to 1-11, 1-14, and 1-18, namely caproic acid, cypress oil, terpinen-4-ol, α-pinene, 1-octen-3-ol, pulegone, p-menthane, and oil mustard, are components that specifically exert a repellent effect against centipedes. On the other hand, it was found that the active ingredients of Comparative Examples 1-2, 1-5, and 1-13, namely nerol, allyl caproate, and carvacrol, are components that specifically exert a repellent effect against millipedes. Nerol and carvacrol, in particular, had a very high repellent effect against millipedes.

Claims

[Claim 1] A centipede and millipede repellent comprising: The composition contains at least one active ingredient selected from the group consisting of rosemary oil, tea tree oil, menthone, 1,8-cineole, cinnamic aldehyde, eugenol, acetic acid, limonene, thujone, methyl salicylate, and hexanal, A repellent characterized in that the active ingredient is vaporized into space when used.

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