JP2001199808A - Effect enhancer and insect pest controller composition using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an effect enhancer which is a surfactant containing no nonyl phenyl ether and is capable of increasing skin permeability of insect pest controlling component and an insect pest controller composition using the effect enhancer. SOLUTION: This effect enhancer for insect pest controlling component comprises a polyoxyethylene alkyl ether of general formula (I) R1-O-(CH2-CH2- O)m-H (R1 is a 8-16C alkyl group; m is an average number of mols of 3-5) and a polyoxyethylene alkyl ether of general formula (II) R2-O-(CH2-CH2-O)n-H (R2 is a 8-16C alkyl group; n is an average number of mols of 7-11) in the weight ratio of 1:10 to 5:1. This insect pest inhibitor composition uses the effect enhancer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agent for enhancing the efficacy of a pest controlling component and a pest controlling composition using the same.

[0002]

2. Description of the Related Art Pests such as mosquitoes, flies and cockroaches inhabit indoors, and various pests such as centipedes, bugs, sting bugs, stink bugs, aphids, and termites inhabit outdoors. In addition, various insect control agents such as emulsions, flowables, oils, coatings, and aerosols are commercially available. Among them, emulsions and flowables are preparations composed of pest control ingredients, solvents, surfactants, etc., and are used by appropriately diluting them with water at the time of use. In view of the above, the selection of the surfactant is a very important factor. In addition, a coating agent that is not diluted at the time of use, even in an aerosol, in the case of an aqueous preparation, a surfactant is usually blended, and also in an oil agent, for example, in order to impart adhesion to the application surface of a pest control component, for example. Surfactants may be added. Conventionally, surfactants used for these insect-controlling agents are mainly polyoxyethylene nonyl phenyl ether surfactants, for example, anionic surfactants are blended with polyoxyethylene nonyl phenyl ether surfactants The HLB with adjusted HLB has been widely used, but recently, due to environmental problems, use of a surfactant containing no nonylphenyl ether has been desired.

[0003] In order for the insect-controlling component contained in the insect-controlling agent to exhibit its efficacy, it is first necessary to penetrate the insect from the surface of the insect pest. Therefore, surfactants that can significantly increase the skin permeability of the pest control component can be said to be useful as an efficacy enhancer for the pest control component. For example, a surfactant of the conventional polyoxyethylene nonylphenyl ether type surfactant against cockroaches The effect was not as good as a potency enhancer.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to a surfactant containing no nonylphenyl ether, which enhances skin permeability of a pest control component, and a pest control composition using the same. The purpose is to provide.

[0005]

Means for Solving the Problems and Embodiments of the Invention
In order to solve the above-mentioned problems, the present inventors have conducted intensive studies and as a result, have found that a surfactant in which a specific polyoxyethylene alkyl ether is combined in a specific ratio is effective. The present inventors have found that a composition in which one or more kinds of pest controlling components selected from an organic phosphorus agent, a pyrethroid insecticide and a pyrethroid-like insecticide are suitable for the purpose, and completed the present invention.

That is, the invention of claim 1 relates to a compound represented by the general formula (I): R ₁ —O— (CH ₂ —CH ₂ —O) _m —H (wherein R ₁ represents an alkyl group having 8 to 16 carbon atoms) Represent
m represents an average number of moles of 3 to 5) and a polyoxyethylene alkyl ether represented by the general formula (II): R ₂ —O— (CH ₂ —CH ₂ —O) _n —H ₂ represents an alkyl group having 8 to 16 carbon atoms,
n represents an average number of moles of 7 to 11) and a polyoxyethylene alkyl ether represented by the formula (1), in a weight ratio of 1:10 to 5: 1. .

The present invention relates to the above-mentioned general formula (I) and general formula (I)
The use of the polyoxyethylene alkyl ether-based surfactant (I) in combination enhances the efficacy of the pest control component. Although the polyoxyethylene alkyl ether surfactant itself is known, it is conventionally used only as an auxiliary component of the polyoxyethylene nonyl phenyl ether surfactant, and has the general formula (I) and the general formula (II) ) Was not expected to be useful as a potentiator of pest control ingredients. Although the reason for the effect enhancing effect is unknown, it is considered that it works advantageously on the skin permeation mechanism of the pest control component.

The polyoxyethylene alkyl ethers represented by the general formulas (I) and (II) are preferably liquid at room temperature from the viewpoint of skin penetration, and their useful ratio as an efficacy enhancer is a weight ratio. And the effect-enhancing effect is remarkable when the blending ratio is 1: 3 to 3: 1. Examples of the alkyl group having 8 to 16 carbon atoms include octyl, decyl, dodecyl, lauryl, myristyl, and cetyl groups. Particularly, lauryl and myristyl groups having 12 to 14 carbon atoms are preferable. .
The average number of moles of the polyoxyethylene group indicates a representative value of the mole number distribution. Usually, 90% or more of the entire distribution is in the range of [average mole number ± 2] in the case of the general formula (I). In the case of the general formula (II), it exists in the range of [average mole number ± 3].

Examples of the pest-controlling component whose insecticidal efficacy is enhanced by the potency enhancer of the present invention include the following components, and one or more selected from organophosphorus agents, pyrethroid-like insecticides, and pyrethroid-like insecticides. Two or more are preferred. Organic phosphorus agents: fenitrothion, diazinon, fenthion, chlorpyrifosmethyl, dichlorvos, prothiophos, propetanphos, etc. Pyrethroid insecticides: phenothrin, permethrin,
Cyphenothrin, cypermethrin, resmethrin, phthalthrine, allethrin, prarethrin, framethrin, imiprothrin, bifenthrin, fenpropatrin, tralomethrin, etc., pyrethroid-like insecticides: etofenprox, silafluofen, etc., other insecticides: methoprene, hydropridren, hydroprene, etc. , Acetamiprid, diflubenzuron, pyriproxyfen, flufenoxuron, fipronil, etc.In addition, the pest control component contains an asymmetric carbon or a double bond in its chemical structure, and optical isomers and geometric isomers based on this are included. If present, of course, each or any mixture thereof is also included in the present invention.

An appropriate amount of the above-mentioned pest control component and the potency enhancer of the present invention are mixed, and the composition is usually supported on a liquid carrier or a solid carrier. If necessary, an emulsifier, a dispersant, a stabilizer and a propellant are used. And the like, to prepare a pesticidal composition such as emulsions, flowables, oils, coatings, aerosols, wettable powders, etc., which are in a known dosage form. The amount of the pest controlling component is suitably 0.1 to 40% by weight based on the total amount of the pest controlling composition, and may be appropriately diluted with water depending on the use. On the other hand, the potency enhancer of the present invention comprises a polyoxyethylene alkyl ether of the general formula (I) and a polyoxyethylene alkyl ether of the general formula (II) in an amount of 0.1 to 10% by weight and 0.2 to 10% by weight, respectively. %. If both are less than the lower limits, the desired effect-enhancing effect cannot be obtained, and if both exceed 10% by weight, it is not preferable in terms of the physical properties of the pesticidal composition.

Examples of the liquid carrier include: aliphatic hydrocarbons such as water, kerosene, n-paraffin and isoparaffin; aromatic hydrocarbons such as xylene, ethylbenzene and methylnaphthalene; alcohols such as ethanol and isopropanol; and acetone. And ketones such as methyl ethyl ketone and cyclohexanone, and esters such as ethyl acetate and butyl acetate.

Examples of the solid carrier include mineral powders such as silicic acid, kaolin, diatomaceous earth, clay, talc, bentonite, calcium carbonate, plant powders such as wood flour and wheat flour, starch, cyclodextrin and the like. And the like.

The emulsifier and dispersant can be formulated with only the efficacy enhancer (surfactant) of the present invention.
A sorbitan fatty acid ester, a glycerin fatty acid ester, a polyethylene glycol fatty acid ester, a polyoxyethylene alkylphenyl ether, a sulfuric acid ester of a higher alcohol, and the like may be added as long as the performance of the potency enhancer of the present invention is not hindered. Examples of the stabilizer include BHT (2,6-di-tert-butyl-4-methylphenol), epoxidized soybean oil, and epoxidized linseed oil. As the propellant, liquefied petroleum gas (LPG ), Dimethyl ether, Freon gas, compressed gas (nitrogen gas, carbon dioxide gas, etc.).

As described above, the efficacy enhancer of the present invention comprises:
It is usually prepared and used in pesticidal compositions such as emulsions, flowables, oils, coatings, aerosols, wettable powders, etc.In addition to pest controlling ingredients, miticides, fungicides, repellents, A fragrance or the like may be added to form a multipurpose composition.

According to a second aspect of the present invention, in the constitution of the first aspect, one or more of an organic phosphorus agent, a pyrethroid insecticide, and a pyrethroid-like insecticide are selected as the pest controlling component.

Further, the invention of claim 3 relates to the pest control component of 0.1 to 40% by weight based on the total amount of the pest control composition, wherein R ₁ -O- (CH ₂ -CH ₂ ) _2- O) _m -H (wherein, R ₁ represents an alkyl group having 8 to 16 carbon atoms;
m represents an average number of moles of 3 to 5), and 0.1 to 10% by weight of a polyoxyethylene alkyl ether represented by the general formula (II): R ₂ —O— (CH ₂ —CH ₂ —O) _n -H (wherein, R ₂ represents an alkyl group having 8 to 16 carbon atoms;
n represents an average number of moles of 7 to 11), and 0.2 to 10% by weight of a polyoxyethylene alkyl ether represented by the following formula:
The present invention relates to a pesticidal composition mixed together at a weight ratio of 1:10 to 5: 1.

According to a fourth aspect of the present invention, in the constitution of the third aspect, one or two or more kinds are selected from the organic phosphorus agent, the pyrethroid insecticide, and the pyrethroid-like insecticide as the pest controlling component.

The pesticidal composition of the present invention obtained by mixing an appropriate amount of the pest controlling component and the potency enhancer of the present invention comprises:
Controlling adult mosquitoes, flies, cockroaches, etc. indoors, and controlling the sources of mosquitoes, flies, chironomids, etc. outdoors, for example, in gutters and garbage landfills, or centipedes, pitworms, stag beetles, stink bugs, aphids, termites, etc. It is extremely effective in controlling various pests. In addition, due to the effect of enhancing potency, it is possible to reduce the amount of the pest control component, and the economical advantage is great.

[0019]

EXAMPLES Next, based on specific examples and test examples, the efficacy enhancer of the present invention and a pest control composition using the same will be described in more detail.

Embodiment 1 To 5.0 parts of permethrin, 1.6 parts of the potency enhancer of the present invention [polyoxyethylene alkyl ether (C = 12 to 14, average mole number = 4) and 1.6 parts of polyoxyethylene alkyl ether (C = 10 to 14, average (Mol number = 9), 2.0 parts of a mixture] and 1.8 parts of calcium dodecylbenzenesulfonate, and further added kerosene to make the total amount 100 parts to obtain an emulsion-type pesticidal composition of the present invention. This emulsion was diluted 20 times with water,
When subjected to pest control in a restaurant at a spraying concentration of 50 ml per m ² , it showed a high rapid action and a lethal effect especially on cockroaches, and there was no problem in terms of the emulsion stability of the diluent.

Embodiment 2 FIG. 3.0 parts of silafluofen and 6.0 parts of octachlorodipropyl ether were added to the potency enhancer of the present invention [polyoxyethylene alkyl ether (C =
Mixture of 3.2 parts of 12-14, average number of moles = 3) and 2.0 parts of polyoxyethylene alkyl ether (C = 10-14, average number of moles = 10)] and 1.8 parts of calcium dodecylbenzenesulfonate Was further added, and kerosene was further added to make the total amount 100 parts, thereby obtaining an emulsion-type pesticidal composition of the present invention. This emulsion was diluted 30-fold with water, and the diluted solution was placed on a soil under the floor of a house where termites were observed in a volume of 1 m.
3 L was sprayed per ² pieces. The drug exhibited high termiticidal efficacy against wandering termites and maintained excellent termiticidal efficacy for over 5 years.

Embodiment 3 FIG. A pest control component comprising 20 parts of fenitrothion and 5 parts of pyriproxyfen is added to the potency enhancer of the present invention [polyoxyethylene alkyl ether (C
Of polyoxyethylene alkyl ether (C = 12 to 16, average molar number = 11) 8.0 parts] and mixed well, and then mixed. # 80 (Shionogi Pharmaceutical registered trademark: synthetic hydrous silicon oxide fine powder) 36 parts, epoxidized soybean oil 1 part,
26 parts of 300-medium diatomaceous earth was added, and the mixture was stirred and mixed with a juice mixer to obtain a wettable powder-type pesticidal composition of the present invention. This wettable powder was diluted 800 times with water and sprayed at ² L / m2 at a garbage collection site where fly larvae (maggots) were generated. Was completed.

Embodiment 4 FIG. 1.0 g of phenothrin (0.47 W / W% based on the total amount of the aerosol composition), 0.5 g (0.24 W / W%) of imiprothrin, the efficacy enhancer of the present invention [polyoxyethylene alkyl ether (C =
12-14, average number of moles = 3) 0.3 g (0.14 W /
W%) and polyoxyethylene alkyl ether (C = 1)
2-14, average number of moles = 9) 0.6 g (0.28 W / W)
%) Is dissolved in kerosene (trade name: deotomisole, C = 11 to 14), 120 ml of an aerosol stock solution obtained by adding 30 ml of water to an aerosol container, and a valve portion is attached to the container. Mixed gas of liquefied petroleum gas and dimethyl ether 150
The mixture was filled under pressure to obtain an aerosol-type pest control composition of the present invention (300 ml; 211 g). This aerosol shows a higher insecticidal effect on cockroaches, centipedes, pit viper, warads, stink bugs, etc. than conventional products.
The storage stability of the content liquid was also excellent.

Test Example 1 A pest control composition of the present invention having the emulsion type shown in Table 1 was prepared according to Example 1,
After diluting twice, 2 ml (50 ml / m ² ) of the diluted solution was uniformly applied dropwise to a decorative board of 20 cm × 20 cm by a pipette. After air drying, 12cm in diameter and 11cm in height
10 cockroaches prepared in a glass ring were contacted for 24 hours, and knockdown insects were observed over time.
After 24 hours, they were transferred to another container, and after 72 hours, the mortality was examined. Table 1 also shows the results. The knockdown effect of each emulsion was 1.0 to 1.0 when the conventional polyoxyethylene nonylphenyl ether was used as an emulsifier.
As a relative ratio.

[0025]

[Table 1]

As a result of the test, the pesticidal composition of the present invention showed high rapidity and lethal effect. On the other hand, even when a conventional polyoxyethylene nonyl phenyl ether is used as an emulsifier (Comparative Example 1) or a polyoxyethylene alkyl ether, the carbon of the alkyl group of the general formula (I) or (II) is The number and the number of moles are out of the range, or only one of them is used (Comparative Example 2
5) or those in which the mixing ratio of the general formulas (I) and (II) is out of the range of 1:10 to 5: 1, or 10
In the case of compounding in excess of wt% (Comparative Examples 6 to 8), no particular improvement in the fast-acting effect was observed. Therefore, it has been clarified that a combination of the general formula (I) and the general formula (II) at a specific ratio is extremely useful as an efficacy enhancer and can provide an excellent pesticidal composition of the present invention. .

[0027]

Industrial Applicability The present invention provides a surfactant containing no nonylphenyl ether, which enhances skin permeability of a pest control component, and a pest control composition using the same.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A01N 55/00 A01N 53/00 504F 57/14 508A 508C

Claims (4)

[Claims] 1. A compound of the formula (I): R ₁ —O— (CH ₂ —CH ₂ —O) _m —H (wherein R ₁ represents an alkyl group having 8 to 16 carbon atoms;
m represents an average number of moles of 3 to 5) and a polyoxyethylene alkyl ether represented by the general formula (II): R ₂ —O— (CH ₂ —CH ₂ —O) _n —H ₂ represents an alkyl group having 8 to 16 carbon atoms,
n represents an average number of moles of 7 to 11) and a polyoxyethylene alkyl ether represented by the formula (1), in a weight ratio of 1:10 to 5: 1. . 2. The efficacy of the pest control component according to claim 1, wherein the pest control component is one or more selected from an organic phosphorus agent, a pyrethroid insecticide and a pyrethroid-like insecticide. Enhancer. 3. An amount of 0.1% to the total amount of the pesticidal composition.
To 40% by weight of the pest controlling component, a compound represented by the general formula (I) R ₁ -O- (CH ₂ -CH ₂ -O) _m -H (wherein R ₁ represents an alkyl group having 8 to 16 carbon atoms) ,
m represents an average number of moles of 3 to 5), and 0.1 to 10% by weight of a polyoxyethylene alkyl ether represented by the general formula (II): R ₂ —O— (CH ₂ —CH ₂ —O) _n -H (wherein, R ₂ represents an alkyl group having 8 to 16 carbon atoms;
n represents an average number of moles of 7 to 11), and 0.2 to 10% by weight of a polyoxyethylene alkyl ether represented by the following formula:
A pesticidal composition, which is blended together at a weight ratio of 1:10 to 5: 1. 4. The pesticidal composition according to claim 3, wherein the pest controlling component is one or more selected from an organic phosphorus agent, a pyrethroid insecticide and a pyrethroid-like insecticide. .