Pest control agents

Abstract

To provide a pest control agent that has sufficient storage stability and does not cause the problems of stickiness and contamination on the usage scene.SOLUTION: A pest control agent contains the following components (A)-(D): (A) pyrethrum extract, (B) polyoxyethylene hardened castor oil, (C) a specific ester surfactant, and (D) water. The mixture ratio of the components (B) and (C) is 50:50-95:5 in weight ratio.SELECTED DRAWING: None

Description

Technical Field

[0006] , , , , ,

[0001] The present invention relates to a pest control agent.

Background Art

[0002] In order to reduce the problem of flammability, the development of one-component aqueous pest control agents and aqueous aerosol agents containing water has been attempted. (For example, Patent Document 1)

[0003] The extract of Artemisia lactiflora has a control effect on various pests and is used as an active ingredient of an aerosol agent. When the extract of Artemisia lactiflora is dissolved in water to form an aqueous insecticide or an aqueous aerosol agent, a surfactant is used. However, when the amount of the surfactant used is increased, there is a problem that the surfactant remains on the treated surface, resulting in stickiness and contamination. Therefore, although it is preferable that the amount of the surfactant used is as small as possible, when the amount is reduced, there are problems such as insufficient dissolution of the extract of Artemisia lactiflora or separation and turbidity during storage.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a pest control agent having excellent storage stability and no problem of stickiness or contamination in the usage scene.

Means for Solving the Problems

[0006] <​​​​​​(B) Polyoxyethylene hydrogenated castor oil, (C) General formula (I) TIFF0007896927000001.tif4290 and / or General formula (II) TIFF0007896927000002.tif55105[In formula (I) or formula (II), R1 represents oleic acid, stearic acid, or palmitic acid; R2 represents oleic acid, stearic acid, palmitic acid, or a hydrogen atom; and R3 represents oleic acid, stearic acid, palmitic acid, or a hydrogen atom. When R2 represents a hydrogen atom, then R3 also represents a hydrogen atom. When R2 represents oleic acid, then both R1 and R3 also represent oleic acid. When R2 represents stearic acid, then both R1 and R3 also represent stearic acid. When R2 represents palmitic acid, then both R1 and R3 also represent palmitic acid. Ester-type surfactants shown in (D) Water; The insecticide according to claim 1, wherein the mixing ratio of component (B) and component (C) is 50:50 to 95:5 by weight. [2] A pest control agent characterized in that the content of component (B) and component (C) is 3.0 to 10.0% by weight relative to the total amount of the pest control agent. [3] A spray for pest control, which is filled with the above-mentioned pest control agent. To provide. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an insecticide with excellent storage stability. Furthermore, when such an insecticide is used as a spray, contamination of the treated surface can be significantly reduced. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a photograph showing the properties of the pest control agent of Example 1 after the storage stability test. [Figure 2] Figure 2 is a photograph showing the properties of the pest control agent of Comparative Example 1 after the storage stability test. [Figure 3] Figure 3 is a photograph showing the properties of the pest control agent of Comparative Example 2 after the storage stability test. [Modes for carrying out the invention]

[0009] The component (A) pyrethrum extract used in the present invention contains six types of natural pyrethrins: pyrethrin I, II, synerin I, II, and jasmolin I, II, as well as plant-derived impurities and solvents. It is preferable to use pyrethrum extract with a concentration of natural pyrethrins of 10% to 80%. The pyrethrum extract content is usually 0.01 to 5.0% by weight relative to the total amount of the pest control agent.

[0010] As component (B) polyoxyethylene hydrogenated castor oil used in the present invention, it is preferable to use polyoxyethylene hydrogenated castor oil having an average number of moles of ethylene oxide added of 25 to 100 moles. Examples of commercially available polyoxyethylene hydrogenated castor oils include Emanon CH-40 (manufactured by Kao Corporation, POE(40) hydrogenated castor oil), Emanon CH-60 (manufactured by Kao Corporation, POE(60) hydrogenated castor oil), Emanon CH-80 (manufactured by Kao Corporation, POE(80) hydrogenated castor oil), Nikkol HCO40 (manufactured by Nikko Chemicals Co., Ltd., POE(40) hydrogenated castor oil), Nikkol HCO60 (manufactured by Nikko Chemicals Co., Ltd., POE(60) hydrogenated castor oil), and Nikkol HCO100 (manufactured by Nikko Chemicals Co., Ltd., POE(100) hydrogenated castor oil).

[0011] Examples of commercially available ester compounds for component (C) used in the present invention include Newcalgen D-935 (manufactured by Takemoto Oil Co., Ltd., sorbitan oleate), Leodol SP-030V (manufactured by Kao Chemical Co., Ltd., sorbitan oleate), Leodol SP-S10V (manufactured by Kao Chemical Co., Ltd., sorbitan stearate), and Leodol SP-P10 (manufactured by Kao Chemical Co., Ltd., sorbitan palmitate).

[0012] The component (B) and the component (C) are blended such that the blending ratio is 50:50 to 95:5 by weight ratio. By blending so as to be within this range, a one-component aqueous pest control agent can be obtained.

[0013] The contents of the component (B) and the component (C) are preferably in the range of 3.0 to 10.0% by weight based on the total amount of the pest control agent.

[0014] From the viewpoint of reducing flammability, the water content of the component (D) water used in the present invention is preferably 85.0% by weight or more based on the total amount of the pest control agent.

[0015] The pest control agent of the present invention may further contain other components, for example, preservatives, bactericides, fungicides, deodorants, pH adjusters, chelating agents, and fragrances. Examples of the preservative include parabens such as eucalyptus oil, phenoxyethanol, and methylparaben. Examples of the fragrance include synthetic fragrances and vegetable oils, and particularly essential oils are desirable. Specific examples of essential oils include hinoki oil, hiba oil, cedarwood oil, anise oil, camphor oil, clove oil, pimento oil, pine oil, pine needle oil, manuka oil, patchouli oil, star anise oil, hyssop oil, palmarosa oil, lemongrass oil, thyme oil, dill oil, celery oil, peppermint oil, lemon eucalyptus oil, citronella oil, lemon scented tea tree oil, lavender oil, geranium oil, rosemary oil, tea tree oil, bergamot oil, orange oil, marjoram oil, juniper berry oil, ylang-ylang oil, clary sage oil, and rose oil. These can be used alone or in combination of two or more.

[0016] The pest control agent of the present invention is filled, for example, in a spray container equipped with a manual pump and used as a non-aerosol type spray agent. It may also be filled in a pressure-resistant container together with an aerosol agent such as LPG or dimethyl ether and used as an aerosol type spray agent.

[0017] The spray agent is used, for example, by directly spraying it on pests in living spaces such as kitchens, living rooms, and entrances. It is also possible to control pests by spraying in advance on hiding places and passageways of pests such as curtains, window screens, and under the floor.

[0018] The pests targeted for control by the pest control agent of the present invention include the following pests. Hemiptera pests: stink bugs such as green stink bugs, narrow-winged stink bugs, large-spined stink bugs, spined stink bugs, striped green stink bugs, and kudzu stink bugs; bed bugs such as common bed bugs; louse bugs, etc. Lepidoptera pests: pyralid moths such as rice stem borers, leafrollers, and common swift moths, etc. Diptera pests: house flies such as common house flies, lesser house flies, and tropical house flies; mosquitoes of the genus Aedes such as Aedes aegypti, Aedes albopictus; midges; houseflies such as Musca domestica and Musca sorbens; fruit flies; flesh flies such as Sarcophaga peregrina; blowflies such as Calliphora vicina, etc. Coleoptera pests: weevils such as rice water weevils and azuki bean weevils; darkling beetles such as Gonocephalum reticulatum; lady beetles; ground beetles, etc. Blattodea pests: cockroaches such as German cockroaches, black cockroaches, oriental cockroaches, smokybrown cockroaches, and American cockroaches, etc. Staphylinidae pests: rove beetles such as Paederus fuscipes, Paederus tamulus, and Paederus sabaeus. Psocoptera pests: booklice such as Liposcelis bostrychophila, Liposcelis entomophila, Liposcelis paeta, and Liposcelis decolor, etc. Acari pests: Ticks such as *Haemaphysalis longicornis*, *Haemaphysalis japonica*, *Haemaphysalis sculptureus*, etc.; Dust mites such as *Haemaphysalis longicornis*, *Dermatophagoides pteronyssinus*, etc.; Predatory mites such as *Chrysollicularis japonica*, *Chrysollicularis stag beetle*, etc.; Mites such as *Platypleura kaempferi*, *Platypleura kaempferi*, etc.; Chiggers such as *Crocothemis fulgidissima*, etc.; [Examples]

[0019] The present invention will be further described below with reference to examples, but the present invention is not limited to these examples. [Examples]

[0020] A mixture was obtained by mixing 0.4 parts by weight of pyrethrum extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, with a natural pyrethrin content of 75% by weight), 4.5 parts by weight of POE(40) hydrogenated castor oil (Emanon CH40, manufactured by Kao Corporation), and 0.5 parts by weight of sorbitan oleate (Leodol SP-O30V, manufactured by Kao Corporation). This mixture was thoroughly mixed with 94.6 parts by weight of purified water using a stirrer to obtain the pest control agent of the present invention. [Examples]

[0021] A mixture was obtained by mixing 0.4 parts by weight of pyrethrum extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, natural pyrethrin content: 75% by weight), 4.5 parts by weight of POE(60) hydrogenated castor oil (Emanon CH60, manufactured by Kao Corporation), and 3.0 parts by weight of sorbitan oleate (New Calgen D-935, manufactured by Takemoto Oil & Fat Co., Ltd.). This mixture was thoroughly mixed with 92.1 parts by weight of purified water using a stirrer to obtain the pest control agent of the present invention. Comparative Example 1

[0022] 0.4 parts by weight of pyrethrum extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, natural pyrethrin content: 75% by weight) and 3.0 parts by weight of POE(40) hydrogenated castor oil (Emanon CH40, manufactured by Kao Corporation) were mixed to obtain a mixture. This mixture and 96.6 parts by weight of purified water were thoroughly mixed using a stirrer to obtain an insecticide. Comparative Example 2

[0023] A mixture was obtained by mixing 0.4 parts by weight of pyrethrum extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, natural pyrethrin content: 75% by weight), 0.3 parts by weight of POE(25) hydrogenated castor oil (Emanon CH25, manufactured by Kao Corporation), and 2.7 parts by weight of POE(40) hydrogenated castor oil (Emanon CH40, manufactured by Kao Corporation). This mixture was thoroughly mixed with 96.6 parts by weight of purified water using a stirrer to obtain an insecticide. Comparative Example 3

[0024] A mixture was obtained by mixing pyrethrum extract (Sumitomo Natural Pyrethrin 75, manufactured by Botanical Resources Australia Pty Ltd, natural pyrethrin content: 75% by weight), 2.5 parts by weight of POE(40) hydrogenated castor oil (Emanon CH40, manufactured by Kao Corporation), and 2.5 parts by weight of POE(6) sorbitan monooleate (Leodol TW-O106V, manufactured by Kao Corporation). This mixture was thoroughly mixed with 94.6 parts by weight of purified water using a stirrer to obtain an insecticide.

[0025] (Storage stability test) Each of the above 25 ml of pest control agent was poured into a 30 ml transparent screw-top tube (Maruemu Co., Ltd. Screw-top tube No. 6) and stored in a -25°C incubator for 16 hours. The screw-top tubes were removed from the incubator and left to stand in a room at 25°C for 3 hours. The properties of various pest control agents before and after the storage stability test were observed visually, and the results are shown in the table below. In addition, the properties of the pest control agents of Example 1, Comparative Example 1, and Comparative Example 2 after the storage stability test are shown in Figures 1 to 3.

[0026] [table] TIFF0007896927000003.tif45127

[0027] As shown in the table and figure, the pest control agents in Comparative Examples 1-3 were found to have developed cloudiness or precipitates after storage stability testing.

[0028] [Preparing the spray] The pest control agents of the present invention from Example 1 and Example 2 were filled into commercially available trigger spray containers, and a trigger (Canyon, model T-95) was attached to obtain a spray agent.

[0029] [Contamination test] Rush grass (10cm square), polyester curtain (10cm square), vinyl chloride wallpaper (10cm square), and mortar (5cm square) were attached to a plywood board and placed on a table. The nozzle of the spray agent was adjusted so that it faced the center of these objects, and 2 ml of the insecticide was sprayed from a distance of 30 cm from the objects. The presence or absence of contamination on the treated surface was checked after 1 hour of spraying.

[0030] No contamination was observed on the treated surfaces of any of the objects.

Claims

1. The following ingredients (A) to (D): (A) Pyrethrum extract, (B) Polyoxyethylene hydrogenated castor oil, (C) Sorbitan oleate, (D) Water; A non-aerosol type insecticide spray containing an insecticide is filled into a spray container equipped with a manual pump, and the insecticide is contained in the spray container. The average number of moles of ethylene oxide added to polyoxyethylene hydrogenated castor oil is 25 to 100 moles. A spray agent for pest control characterized in that the mixing ratio of component (B) and component (C) is 50:50 to 95:5 by weight.

2. The insecticide spray according to Claim 1, wherein the surfactant is only two types: (B) polyoxyethylene hydrogenated castor oil and (C) sorbitan oleate.

3. The insecticide spray according to claim 1 or 2, wherein the content of component (B) and component (C) is 3.0 to 10.0% by weight relative to the total amount of the insecticide.

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