JP2011105759A - Gastropod pest control agent and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gastropod control agent which effectively and quickly exhibits control effects on gastropod pests such as slugs, Acusta despecta sieboldiana, snails and Pomacea canaliculata. <P>SOLUTION: The gastropod pest control agent includes a cymene-based compound such as 2-isopropyl-5-methylphenol or 4-isopropyl-3-methylphenol. The gastropod pest control agent is mixed with soil. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a killing agent for harmful gastropods such as slugs, uskawamaimai, snails, and scallops that cause damage to useful crops.

  It is well known that mollusks such as slugs, mussels, snails, etc. infest everywhere in fields, greenhouses, gardens, etc., and eat and damage useful crops such as fruit trees, sugar beets and flowers. Yes.

  Conventionally, a metaaldehyde preparation has been used as an attracting poison bait as a disinfectant for controlling these substances. However, this preparation does not exhibit a sufficient effect, and has a disadvantage that it is inferior in its rapid action.

  In addition, terpenes such as hinokitiol and menthol are also expected to be used as repellents as control agents other than those described above. However, there are difficulties in terms of killing activity, and the current situation is that they are not widely used.

  On the other hand, scallop apple mussels eat crops such as paddy rice and lotus roots, and the damage has recently increased. At present, there is no effective means for this control.

  Accordingly, an object of the present invention is to provide a killing agent that effectively and quickly exhibits a killing effect against harmful gastropods such as slugs, mussels, snails, and scallops.

  The present invention solves the above-mentioned problems by using a killing agent containing a cymene compound.

  By using this disinfectant, it is possible to exert an effective killing effect against harmful gastropods such as slugs and snails that have been difficult to extermination in the past, and even when carried on a sheet Can do.

  Since the harmful gastropod killing agent according to the present invention uses a cymene compound, it can quickly exhibit a killing effect against harmful gastropods such as slugs and snails, which have been difficult to control.

  It can also be killed even when it is carried on a sheet.

  The present invention will be described in detail below. The harmful gastropod killer according to the present invention contains a cymene compound.

  The above-mentioned harmful gastropods refer to gastropods that cause damage to useful crops. Slugs such as the scallops (Milacidae) etc. Slugs such as the scallop larvae (Succineidae); And snails such as Sukurimingaigai (jumbotanishi).

  Examples of the cymene compounds include carvacrol (5-isopropyl-2-methylphenol), 3-isopropyl-5-methylphenol, 2-isopropyl-6-methylphenol, 2-isopropyl-5-methylphenol, and 2-isopropyl. -4-methylphenol, 4-isopropyl-3-methylphenol, 4-isopropyl-2-methylphenol, 3-isopropyl-4-methylphenol, 2-isopropyl-3-methylphenol, 3-isopropyl-2-methylphenol , O-thymotic acid, p-thymotic acid, o-thymol aldehyde, p-thymol aldehyde, p-nitrosothymol, p-nitrothymol, p-aminothymol, thymol hydroquinone, thymoquinone, 4-chlorothymol, 4-bromothymol 4 Cymeic compounds having a hydroxyl group such as iodothymol, thymol blue, thymolphthalein, bromothymol blue, and others, o-cymene, m-cymene, p-cymene, 2-bromo-p-cymene, moxysilito hydrochloride, 5-p -Cymene [(3-piperidino) broboxy] derivatives and the like.

  Among these, a cyclone compound having a hydroxyl group is preferable, and 4-isopropyl-3-methylphenol and 2-isopropyl-5-methylphenol are more preferable.

  The disinfectant according to the present invention may be used as such, or may be used by dissolving in a solvent such as alcohol such as methanol or ethanol, and may be used as an emulsion, powder, granule, wettable powder, liquid, water solvent, It may be used after being formulated into a paste or a foaming agent, an aerosol, a microcapsule or the like. Of course, it is also preferable to use an auxiliary agent, for example, a surfactant such as a spreading agent, an emulsifying agent, and a wetting agent to ensure the certainty of the effect.

  Depending on the purpose, these compounds may be mixed with other fungicides, insecticides, herbicides, repellents, fertilizers, etc., and applied at the same time. It can also be an attractant control agent in combination with natural and synthetic attractants such as cereals, bark, protein products, casein, dry yeast and essential oils. Furthermore, you may combine with a fragrance | flavor component, antioxidant, a light stabilizer, etc.

  Examples of the other bactericides include Kitadine P and thiabendazole. Examples of the repellent include p-menthane-3,8-diol, 2-hydroxymethyltrimethylcyclohexanol, N, N-diethyl-m- Toluamide, dimethyl phthalate, 2-ethyl-1,3-hexanediol, sinepiline 222, 2,3,4,5-bis (Δ2-butylene) tetrahydrofurfural, di-n-propylisocincomeronate, di-n Examples thereof include butyl succinate, 2-hydroxyethyl octyl sulfide, enpentrin, curan-3,4-diol, copper compounds such as copper sulfate and copper gluconate, and aluminum compounds such as aluminum sulfate.

  Examples of the fragrance component include eugenol, cineol, eucalyptus oil, moon peach oil, tea tree oil, clove, menthol, anethole, hinokitiol, camphor and the like.

  Examples of the antioxidant and light stabilizer include butylhydroxyanisole, dibutylhydroxytoluene, propyl gallate, tocopherol, gamma oryzanol, ascorbic acid, capsaicin, triphenyl phosphite, diphenylisodecyl phosphite, pt -Butylphenyl salicylate and the like.

  Examples of the method of using the harmful gastropod killer according to the present invention include a direct method and an indirect method. Examples of the direct method include a spraying method in which the disinfectant is dissolved or formulated in a solvent as described above and sprayed. Furthermore, in the agricultural cultivation scene, a treatment method in which the mixture is preliminarily mixed with soil and exterminated in the soil is also included. Examples of the indirect method include a method in which a solution obtained by the above-mentioned killing agent or solvent is carried on a sheet or the like and placed in a gastropod passage. When the above-described sheet or the like is used, harmful gastropods that invade the sheet can be killed.

  The loading method is not particularly limited, but a method at a low temperature is preferable because it may cause decomposition or volatilization of the cymene compound when heated. Examples of such a method include a coating method such as applying the melt on the sheet or immersing the sheet in the melt, or a method of kneading the sheet.

  The material of the sheet or the like is not particularly limited, and examples thereof include polyolefins such as polyethylene and polypropylene, synthetic resins such as polyester, polyamide, and polylactic acid, and natural resins such as cotton, paper, and cellulose.

The blending ratio of the above-mentioned cymene compound in the above-mentioned killing agent can be set to any ratio as desired. When employ | adopting said spraying method, as a density | concentration of the said cymene type compound, 0.02 to 20 weight% is good and 0.1 to 5 weight% is preferable. Furthermore, in the case of mixing with soil, it varies depending on the density of harmful gastropods, but 1 to 100 g / m ² is preferable. Moreover, when employ | adopting the method carry | supported to said sheet | seat, although the density | concentration of the said cymene type compound is not specifically limited, 0.05-50 g / m < ² > is preferable. Below the lower limit of each of the above ranges, the killing effect may be insufficient. On the other hand, if the upper limit of each of the above ranges is exceeded, phytotoxicity to flowers and the like may occur.

The present invention will be described more specifically with reference to the following examples and comparative examples.
Example 1
Hereinafter, the present invention will be described in more detail with reference to examples. 2-Isopropyl-5-methylphenol was dissolved in 40% ethanol to a predetermined concentration to prepare a test solution. One drop (0.05 ml) of this was dropped into a slug (Chakoura slug) and the time to death was measured. Similarly, it was dripped on a snail (L. japonica) and the time to death was measured. The results are shown in Table 1.

(Example 2)
After mixing and dissolving 0.5 g of 2-isopropyl-5-methylphenol and 1.5 g of a surfactant, New Calgen 2119K (manufactured by Takemoto Yushi), 98 g of water was added to prepare a 0.5% aqueous agent as an aqueous test. It was set as the solution. The effect on slugs was determined in the same manner as in Example 1. Similarly, it was dripped on a snail (L. japonica) and the time to death was measured. The results are shown in Table 1.

(Example 3)
4-Isopropyl-3-methylphenol was dissolved in 40% ethanol to a predetermined concentration to prepare a test solution. The effect on slugs was determined in the same manner as in Example 1. Similarly, it was dripped on a snail (L. japonica) and the time to death was measured. The results are shown in Table 1.

(Comparative Example 1)
Hinokitiol, which is said to have a high repellent effect, was dissolved in 40% ethanol to a predetermined concentration to obtain a test solution. The effect on slugs was determined in the same manner as in Example 1. The results are shown in Table 1. Similarly, it was dripped on a snail (L. japonica) and the time to death was measured. The results are shown in Table 1.

(Comparative Example 2)
Menthol, which is considered to have a high repellent effect, was dissolved in 40% ethanol so as to have a predetermined concentration to obtain a test solution. The effect on slugs was determined in the same manner as in Example 1. Similarly, it was dripped on a snail (L. japonica) and the time to death was measured. The results are shown in Table 1.

(Comparative Example 3)
Methaldehyde, which has been put to practical use as an attracting and controlling agent, was dispersed with water and a surfactant so as to have a predetermined concentration to prepare a test solution. The effect on slugs was determined in the same manner as in Example 1.

Example 4
2-Isopropyl-5-methylphenol was dissolved in ethanol, uniformly applied to a predetermined concentration on a filter paper having a diameter of 9 cm, and dried at room temperature. After the slug (Chakoura slug) was placed at the center of the filter paper, the minimum coating concentration at which the slug stayed on the filter paper and died as it was (hereinafter referred to as “restrained lethal concentration”) was determined. This evaluation was conducted for the purpose of evaluating the activity of preventing slug invasion into the coated sheet. The results are shown in Table 2.

(Example 5)
Evaluation was performed in the same manner as in Example 4 except that 4-isopropyl-3-methylphenol was used. The results are shown in Table 2.

(Comparative Example 4)
Evaluation was performed in the same manner as in Example 4 except that hinokitiol was used. The results are shown in Table 2.

(Comparative Example 5)
Evaluation was performed in the same manner as in Example 4 except that a solution in which metaldehyde was dissolved in chloroform was used. The results are shown in Table 2.

Claims (2)

  A detrimental agent for harmful gastropods, which is a granule prepared by mixing a surfactant with 2-isopropyl-5-methylphenol or 4-isopropyl-3-methylphenol and carrying the mixture on a carrier.   A method for killing harmful gastropods, comprising adding the killing agent for harmful gastropods according to claim 1 to soil.