JP2024024430A - Insect pest control agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insect pest control agent having a superior insect pest control effect.

SOLUTION: An insect pest control agent includes: at least one kind selected from a group composed of pyrethrum extract, surfactant and alcohol; a polyethylene glycol; and water. A content of the polyethylene glycol is 1 to 15 wt.% based on an entire amount of the insect pest control agent. The insect pest control agent produces a superior insect pest control effect. An insect pest control method applies the insect pest control agent to have contact with a pest insect so that the pest insect can efficiently be controlled.

SELECTED DRAWING: None

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to pest control agents.

As consumers become more natural-oriented and safety-oriented, insect pest control agents containing natural ingredients such as Physcomitrium japonica and water have been developed (for example, Patent Document 1 and Patent Document 2).

JP2011-251922 JP2020-176105

An object of the present invention is to provide a pest control agent that is more effective in controlling pests.

The present inventors have conducted intensive studies to solve these problems, and as a result, have arrived at the present invention. That is, the present invention
[1] A pest control agent containing a polyethylene glycol and water, at least one member selected from the group consisting of Stereopsis extract, a surfactant, and an alcohol, wherein the content of the polyethylene glycol is greater than the total amount of the pest control agent. A pest control agent characterized in that the amount is 1 to 15% by weight.
[2] A method for controlling pests, which comprises applying the pest control agent in contact with pests.
I will provide a.

According to the present invention, it is possible to provide a pest control agent having superior pest control effects. In addition, by applying the pest control agent in contact with pests, it becomes possible to efficiently control pests.

The pyrethrum extract used in the pest control agent of the present invention is an extract from naturally occurring pyrethrum. The Stemium extract usually contains six types of active ingredients: pyrethrin I, pyrethrin II, cinerin I, cinerin II, jasmolin I, and jasmolin II. These six types of components are collectively referred to as total pyrethrins, and the total pyrethrin content of the Stemium extract used in the present invention is 10 to 90%. The content of Stemium extract is usually 0.05 to 1% by weight, preferably 0.05 to 0.5% by weight, based on the total amount of the pest control agent.

Examples of alcohols used in the pest control agent of the present invention include alcohols having 1 to 4 carbon atoms, such as ethanol, n-propanol, isopropanol, and n-butanol. Among these, isopropanol and ethanol are preferred.

Examples of surfactants used in the pest control agent of the present invention include glycerin fatty acid esters sold as DECAGLYN-1-OV manufactured by Nikko Chemicals Co., Ltd. and 01075TX manufactured by Takemoto Yushi Co., Ltd.; Sorbitan fatty acid esters sold as Nucalgen D-935 manufactured by Kao Chemical Co., Ltd., Rheodol SP-030V manufactured by Kao Chemical Co., Ltd., Rheodol SP-S10V manufactured by Kao Chemical Co., Ltd., Rheodol SP-P10 manufactured by Kao Chemical Co., Ltd., etc. Emanone CH-40 (manufactured by Kao Corporation, POE (40) hydrogenated castor oil), Emanone CH-60 (manufactured by Kao Corporation, POE (60) hydrogenated castor oil), Emanone CH-80 (manufactured by Kao Corporation) , POE (80) hydrogenated castor oil), Nikkor HCO40 (manufactured by Nikko Chemicals Co., Ltd., POE (40) hydrogenated castor oil), Nikkor HCO60 (manufactured by Nikko Chemicals Co., Ltd., POE (60) hydrogenated castor oil), Nikkor HCO100 (manufactured by Nikko Chemicals Co., Ltd., POE (100) hydrogenated castor oil), New Calgen D-240K (manufactured by Takemoto Yushi Co., Ltd., POE (40) hydrogenated castor oil), New Calgen D-260K (Takemoto Yushi Co., Ltd.) Examples include polyoxyethylene hydrogenated castor oil with an average number of added moles of ethylene oxide of 25 to 100 moles, which is sold by POE (60) hydrogenated castor oil). These surfactants may be used alone or in combination of two or more. The content of the surfactant is usually 1.0 to 10% by weight based on the total amount of the pest control agent.

Examples of the polyethylene glycol used in the pest control agent of the present invention include polyethylene glycols having an average molecular weight of 180 to 640 and sold as PEG200, PEG300, PEG400, PEG500, PEG600, etc. The content of polyethylene glycol is 1 to 15% by weight, preferably 2.5 to 10% by weight, and more preferably 5 to 10% by weight based on the total amount of the pest control agent.

The content of water in the pest control agent of the present invention is at least 40% by weight or more, preferably 50% or more, more preferably 60% by weight or more, still more preferably 70% by weight or more, based on the total amount of the pest control agent. More preferably, it is 80% by weight or more.

The pest control agent of the present invention may contain pest control ingredients other than Stemium extract, preservatives, bactericides, fungicides, deodorants, pH adjusters, chelating agents, solubilizing agents, and enhancers. It can contain a sticky agent, a fragrance ingredient, etc.

Examples of preservatives include eucalyptus oil, phenoxyethanol, and parabens such as methylparaben. When containing a preservative, the content is usually 0.1 to 2.0% by weight based on the total amount of the pest control agent.

Examples of the pH adjuster include monopotassium citrate, citric acid, disodium hydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, and sodium hydrogen carbonate. When a pH adjuster is included, the content is usually 0.01 to 0.1% by weight based on the total amount of the pest control agent.

Examples of chelating agents include metal salts of ethylenediaminetetraacetic acid (EDTA), such as sodium salts of ethylenediaminetetraacetic acid (EDTA), and ethylenediamine-N,N'-disuccinic acid (EDDS), such as sodium salts of ethylenediamine-N,N'-disuccinic acid (EDDS). Examples include metal salts of '-disuccinic acid (EDDS), metal salts of gluconate such as sodium gluconate and potassium gluconate.

Examples of solubilizing agents include propylene glycol, glycerin, and 1,3-butanediol. Among these, propylene glycol and glycerin also have anti-freeze functions. When containing a solubilizing agent, the content is usually 0.5 to 5.0% by weight based on the total amount of the pest control agent.

Examples of fragrance ingredients include synthetic fragrances and plant essential oils, with plant essential oils being particularly preferred. Plant essential oils include cypress oil, cypress oil, cedarwood oil, anise oil, sandalwood oil, clove oil, pimenta oil, pine oil, pine needle oil, manuka oil, patchouli oil, star anise oil, hyssop oil, and palmarosa oil. , lemongrass oil, thyme oil, dill oil, celery oil, peppermint oil, lemon eucalyptus oil, citronella oil, lemon cent tea tree oil, lavender oil, geranium oil, rosemary oil, tea tree oil, bergamot oil, orange oil, Examples include marjoram oil, juniper berry oil, ylang ylang oil, clary sage oil, and rose oil. When a fragrance component is contained, the content is usually 0.02 to 0.2% by weight based on the total amount of the pest control agent.

The pest control agent of the present invention is usually formulated into an emulsifier or solubilizer. Usually, an oil phase premix is prepared by adding Stereopodium extract, a surfactant, and ingredients with oily properties (e.g., preservatives, fragrance ingredients, etc.) as needed, alcohol, polyethylene glycol, and water as needed. An emulsifier or solubilizer can be prepared by preparing an aqueous phase premix to which a component having aqueous properties (for example, a pH adjuster, etc.) is added, and then mixing these two types of premixes.
In addition, when formulating into an emulsifier, it is preferable to prepare the emulsion particle size to be 5.0 μm or less, preferably 1.5 μm or less. The emulsion particle size herein refers to the 90% particle size in volume distribution measurement using Mastersizer 3000 (Spectris Co., Ltd.).

The pest control agent of the present invention can provide excellent pest control effects when applied in direct contact with pests. Specific application methods include, for example, spraying pest control agents directly onto pests to control them, or spraying them on floors, walls, textile products such as carpets and sheets, etc. An example of this is application as a spray agent, which controls insect pests when they come into contact with the agent. Another example is application as a coating agent, in which a pest control agent is applied to a floor or wall surface in advance, and pests are controlled by coming into contact with the applied pest control agent.

When applied as a spray, for example, the pest control agent of the present invention may be applied as a spray by attaching a trigger type or finger type spray head to a container filled with the pest control agent of the present invention, or the pest control agent of the present invention may be applied as a spray agent with LPG, dimethyl ether, Examples include application as an aerosol agent filled in a pressure-resistant container with a spraying mechanism together with a propellant such as nitrogen gas or carbon dioxide gas.

When applied as a spray, a spray head is usually selected so that the amount of spray per spray is 0.5 to 1.5 ml and the average particle size of the spray at a spray distance of 15 to 30 cm is 80 to 350 μm. Here, the average spray particle diameter refers to the volume cumulative 50% particle diameter of the spray particles that pass 15 to 30 cm from the nozzle tip of the spray agent, using a laser diffraction particle diameter measuring device manufactured by Nikkiso Co., Ltd. It can be measured by AEROTRAC SPR MODEL-7340.

When applying it as a coating agent, for example, the pest control agent of the present invention may be applied as a sheet agent impregnated with a nonwoven fabric made of PET or pulp, or the pest control agent of the present invention may be applied to a container by pressing a ball and rolling it. Examples include application as a roll-on agent filled in a roll-on container onto which the composition can be applied.

The pests to be controlled by the pest control agent of the present invention include flies such as house flies, fruit flies such as fruit flies and butterflies, mosquitoes such as Culex mosquitoes and Aedes albopictus, cockroaches such as German cockroaches and black cockroaches, fleas, and bed bugs. Examples include bed bugs such as Dermatophagoides nigricans, Dermatophagoides nigricans, Dermatophagoides mites, Dermatophagoides mites, Dust mites, Ixodes mites, House dust mites, Dust mites, and Southern mites. Among them, it is excellent in controlling cockroaches and mites.

EXAMPLES The present invention will be further explained below with reference to Examples, but the present invention is not limited to these Examples.

In a 100 ml SUS beaker, add 0.27 g of Stemium extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, natural pyrethrin content: 75% by weight), 0.2 g of eucalyptus oil (manufactured by Daiho Fragrance Co., Ltd.), and peppermint oil (manufactured by Daiho Co., Ltd.). Fragrance Co., Ltd.) 0.1g, phenoxyethanol (Sanyo Chemical Industries Co., Ltd. Nupol EFP) 0.9g, sorbitan fatty acid ester (Takemoto Yushi Co., Ltd. Nucalgen D-935) 4.5g, polyoxyethylene hydrogenated castor oil ( Weigh out 3.0 g (New Calgen D-260K, manufactured by Takemoto Yushi Co., Ltd.) and 2.5 g of propylene glycol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), and mix them with a stirring bar to obtain 11.47 g of oil phase premix. Obtained. Next, in a 200 mL SUS beaker, 0.03 g of potassium dihydrogen phosphate (manufactured by Kanto Kagaku Co., Ltd.), 0.03 g of disodium hydrogen phosphate (manufactured by Kanto Kagaku Co., Ltd.), and polyethylene glycol 400 (manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.) were added. ) and 87.47 g of purified water were weighed out and mixed with a stirring rod to obtain 88.6 g of a water phase premix. While mixing the aqueous phase premix at a rotational speed of 300 rpm using a 3-1 motor (BL600, manufactured by Shinto Scientific Co., Ltd.) equipped with a stirring blade (propeller R, diameter 5 cm, manufactured by Shinto Scientific Co., Ltd.), the oil was added to the water phase premix. After dropping the phase premix over 57 seconds using a pipette, the rotation speed of the 3-1 motor was changed to 400 rpm and mixed for 15 minutes to obtain the pest control agent of the present invention.

According to Example 1, various pest control agents shown in Table 1 were prepared.

Table 1

[Preparation of spray agent]
100 g of the pest control agents of Examples 1 to 4 and Comparative Examples 1 to 2 were filled into commercially available spray containers (capacity 300 ml), and a trigger type spray head (manufactured by Canyon, model T-014) was attached. A spray was obtained.

[Direct spraying test on German cockroaches]
After applying margarine to the inside side of a polycup (bottom diameter 105 mm, depth 70 mm) and placing filter paper (ADVANTEC No. 2 φ106 mm) on the bottom, 10 adult German cockroaches (5 females and 5 males) were placed inside the cup. I put it in. Six of these were prepared, and from a distance of 30 cm from the bottom of the polycup, the filter paper and the spray port of the spray head of the spray agent faced each other, and The above-mentioned spray agent filled with the insecticide was sprayed twice (spray amount: 2 ml). After 20 minutes of spraying, the German cockroaches were transferred to six separately prepared polycups (bottom diameter: 80 mm, depth: 43 mm, inner sides coated with margarine), and left undisturbed for 24 hours at 25°C with food and water provided. and counted the number of dead insects. Table 2 shows the rate of dead insects.

Table 2

[Indirect spray test on German cockroach]
A decorative board (15 x 15 cm) was laid down, and the spray agent was sprayed once from a distance of 30 cm upward, aiming at the approximate center of the decorative board (spray amount: 1 ml). After standing in a room at 25°C for 15 minutes, 10 adult German cockroaches (5 females and 5 males) were placed in a polycup (bottom diameter 80 mm, depth 70 mm, inner side coated with margarine) and placed on the decorative board described above. After putting the lid on, it was turned upside down. After allowing it to stand for 1 minute, it was turned upside down again and the decorative board was removed. After 24 hours, the German cockroaches were allowed to stand still while being fed solid food and water, and the number of dead insects was counted. Indirect spray tests were carried out on the above sprays filled with the pest control agents of Example 1, Example 3, Example 4 and Comparative Example 1. Table 3 shows the rate of dead insects.

Table 3

In the pest control agent of Example 2, the polyethylene glycol 400 was changed to polyethylene glycol 200, polyethylene glycol 300, and polyethylene glycol 600 to create pest control agents of the present invention, respectively (referred to as Examples 5 to 7).

100 g of the pest control agents of Examples 5 to 7 were filled into commercially available trigger spray containers (capacity: 300 ml), and a trigger type spray head (manufactured by Canyon, Model T-014) was attached to obtain a spray. Then, a direct spraying test on the above-mentioned German cockroach was conducted for the spray. The results are shown in Table 4.

Table 4

Claims (5)

A pest control agent containing a polyethylene glycol and water, at least one member selected from the group consisting of Physcomitrium extract, a surfactant, and an alcohol, wherein the content of the polyethylene glycol is relative to the total amount of the pest control agent. A pest control agent characterized in that the content is 1 to 15% by weight. A pest control agent containing a polyethylene glycol and water, at least one member selected from the group consisting of Physcomitrium extract, a surfactant, and an alcohol, wherein the content of the polyethylene glycol is relative to the total amount of the pest control agent. A pest control agent characterized by having a content of 2.5 to 10% by weight. A pest control agent containing a polyethylene glycol and water, at least one member selected from the group consisting of Physcomitrium extract, a surfactant, and an alcohol, wherein the content of the polyethylene glycol is relative to the total amount of the pest control agent. A pest control agent characterized by having a content of 5 to 10% by weight. The pest control agent according to claims 1 to 3, wherein the target to be controlled is cockroaches or mites. A pest control method comprising applying the pest control agent according to any one of claims 1 to 4 in contact with pests.