WO2019035471A1 - Aerosol for pest control and pest control method - Google Patents

Aerosol for pest control and pest control method Download PDF

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Publication number
WO2019035471A1
WO2019035471A1 PCT/JP2018/030403 JP2018030403W WO2019035471A1 WO 2019035471 A1 WO2019035471 A1 WO 2019035471A1 JP 2018030403 W JP2018030403 W JP 2018030403W WO 2019035471 A1 WO2019035471 A1 WO 2019035471A1
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WIPO (PCT)
Prior art keywords
aerosol
pest control
sensitivity
agent
insecticidal component
Prior art date
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PCT/JP2018/030403
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French (fr)
Japanese (ja)
Inventor
洋子 小林
一史 三好
由美 川尻
中山　幸治
Original Assignee
大日本除蟲菊株式会社
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Priority to JP2019536787A priority Critical patent/JP7229922B2/en
Publication of WO2019035471A1 publication Critical patent/WO2019035471A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
    • A01N25/06—Aerosols
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
    • A01N31/02—Acyclic compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • the present invention relates to an aerosol agent for controlling pests, which is obtained by filling an aerosol undiluted solution and a compressed gas in a pressure-resistant container provided with an injection button capable of inverted injection. Furthermore, the present invention relates to a pest control method for controlling pests having reduced sensitivity to pyrethroid insecticidal components.
  • the pest control aerosol agent used outdoors is (1) a direct strike type that sprays for the purpose of flying a pest in the outdoor space according to usage, (2) hidden behind a bush or leaf or a shade of a tree
  • Aerosol insecticide is spray applied beforehand on solid surfaces such as outer wall, window glass, ground, etc. It is classified into ambush type.
  • the direct strike type of (1) requires a rapid effect
  • phthalthrin which is a rapid-acting pyrethroid insecticidal component
  • an insecticidal component having a low vapor pressure and a low volatility is often used.
  • Patent Document 1 Japanese Patent No. 4703172 discloses an aerosol stock solution containing 30 to 70 volumes of an aerosol stock solution containing a normal temperature volatile pyrethroid insecticidal component, a lower alcohol having 1 to 3 carbon atoms, a glycol having 3 to 6 carbon atoms, and water.
  • the outdoor one-component aqueous aerosol composition consisting of 30% to 70% by volume of a propellant containing dimethyl ether and having a pH of 5 to 7 of the aerosol stock solution is spray-coated on the entire cloth surface of the tent. It is described that a barrier of pyrethroid insecticidal component was formed in the periphery, and the entry of flying pests into the tent was prevented for 10 hours or more. However, since the aerosol agent of patent document 1 is using VOC as a propellant, it left the examination subject in the environmental aspect.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2010-1619557 discloses an aerosol agent containing a pyrethroid insecticidal component at normal temperature volatilization and filled with a compressed gas as a propellant and having an average spray particle diameter of 50 to 150 ⁇ m. And the treatment target surface is sprayed so that the treatment amount of the room temperature volatile pyrethroid insecticidal component is 0.5 mg / m 2 or more, and the barrier of the room temperature volatile pyrethroid insecticidal component is above the surface to be treated Disclosed is a method for preventing the infestation of pests, which forms a space and is adapted to inhibit the infestation of pests into this space for more than six hours.
  • Patent Document 2 is environmentally friendly in that compressed gas is used instead of dimethyl ether as a propellant, as compared to Patent Document 1. Further, according to Patent Document 2, a glycol having 3 to 6 carbon atoms, which is blended as a volatilization regulator for the room temperature volatile pyrethroid insecticidal component, improves the adhesion of the pyrethroid insecticidal component to the surface to be treated. Is described as being useful.
  • the test for confirming the control effect against pests (here, the control effect is a broad concept including an insecticidal effect, a repellent effect, an invasion preventing effect, etc.) It was limited to those for which the sensitivity to pyrethroid insecticidal components was not decreased, and no mention was made of the reduced sensitivity to insects, particularly mosquitoes.
  • the present invention has been made in view of the above problems, and after spraying an aerosol agent containing a room temperature volatile pyrethroid-type insecticidal component onto an object to be treated outdoors such as a terrace or veranda, the spray agent is disposed above the object to be treated.
  • the aerosol agent for controlling insect pests which exhibits a pest control effect by forming a barrier space of the above-mentioned normal temperature volatile pyrethroid insecticidal component, it is excellent in adhesion to the surface to be treated and effective formation of the barrier space, and pyrethroid insecticidal It is an object of the present invention to provide an outdoor pest control aerosol agent effective against pests having reduced sensitivity to components, particularly mosquitoes, and a pest control method using the pest control aerosol agent.
  • the present invention has been found out that the following constitution has excellent effects to achieve the above object.
  • (1) It is an aerosol agent for pest control formed by filling an aerosol undiluted solution and compressed gas in a pressure-resistant container provided with an injection button capable of being injected in an inverted direction,
  • the aerosol stock solution is (A) 0.01 to 3.0% by mass of a room temperature volatile pyrethroid insecticidal component having a vapor pressure of 2 ⁇ 10 ⁇ 4 to 1 ⁇ 10 ⁇ 2 mmHg at 30 ° C. (B) A glycol having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or a higher fatty acid ester having a boiling point of 200 to 350 ° C.
  • Aerosol agent for pest control as described.
  • the aerosol agent for pest control according to (1) or (2), wherein the pest whose sensitivity to a pyrethroid insecticidal component is reduced is a control target.
  • the sensitivity reducing coagent is at least one selected from the group consisting of 1,3-butylene glycol, 1,4-butylene glycol, isopropyl myristate, and hexyl laurate (1) to (5)
  • the object to be treated is any one of (2) to (7), which is the floor surface of an outdoor terrace, the floor surface of an outdoor veranda, the surface of a vinyl sheet installed outdoors, or the outdoor ground.
  • the aerosol agent for pest control as described in-.
  • the treated aerosol of the pest agent for pest control according to any one of (1) to (8) is applied to an object to be treated outdoors at a treatment amount of 0.5 to 20 mg / m of the (a) room temperature volatile pyrethroid insecticidal component An injection step of upside-down injection so as to be 2 ;
  • a pest control method including: (10)
  • the aerosol preparation for pest control and pest control method of the present invention as the aerosol stock solution, (a) a vapor pressure at 30 ° C. of 2 ⁇ 10 ⁇ 4 to 1 ⁇ 10 ⁇ 2 mmHg at normal temperature volatilizable pyrethroid insecticide 0.01 to 3.0 mass% of the component, (b) a glycol having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C.
  • a barrier space for controlling pests is formed above the object to be treated for 3 hours or more.
  • the aerosol agent for pest control of the present invention is an aqueous aerosol agent for outdoor use, and it is a room temperature volatile pyrethroid having a vapor pressure of 2 ⁇ 10 -4 to 1 ⁇ 10 -2 mmHg at 30 ° C in the aerosol stock solution (a)
  • the pesticidal component is contained in an amount of 0.01 to 3.0% by mass, preferably 0.08 to 0.17% by mass.
  • pyrethroid insecticidal components include transfluthrin, metfluthrin, profluthrin, empentrin, framethrin, terarethrin, dimefluthrin, mepafluthrin, heptafluthrin and the like.
  • transfluthrin, metfluthrin and profluthrin are preferable, and transfluthrin is more preferable, in consideration of normal temperature volatilization, pest control efficacy, stability, availability of compounds, and the like.
  • the above-mentioned pyrethroid insecticidal components may be used alone or in combination of two or more.
  • the pyrethroid insecticidal component when an optical isomer or geometric isomer based on asymmetric carbon is present in the acid moiety or alcohol portion, each of them or any mixture thereof is also included in the pyrethroid insecticidal component usable in the present invention Be (A) If the content of the normal temperature volatile pyrethroid insecticidal component is less than 0.01% by mass, there is a concern that the pest control efficacy is inferior, while if it exceeds 3.0% by mass, the properties of the aqueous aerosol composition There is a possibility of hindrance.
  • the normal temperature volatile pyrethroid insecticidal component (a) used in the present invention exhibits a direct impact effect and a contact effect on various flying pests and pests. Furthermore, the pyrogenic type insecticidal component at room temperature volatilizes gradually from the jetted solid phase surface (object to be treated) to form an insecticidal component barrier in the environmental space above the solid phase surface, which is effective for preventive control of flying pests. Can contribute to In the present invention, the insecticidal effect, the knockdown effect, the repellent effect, the pest invasion inhibitory effect and the like are comprehensively referred to as a pest control effect.
  • insecticidal component may be appropriately blended to reinforce the pest control aerosol agent of the present invention in a situation where a direct impact effect on the insect pest is expected.
  • an insecticidal component silicon such as phthalosulin, resmethrin, phenthrin, permethrin, cyfenothrin, cypermethrin, allethrin, prarethrin, imiprothrin, monfluorothrin, etofenprox, etc., pyrogenic compounds such as pyrethroid compounds, silafluophene, etc.
  • Examples thereof include organic compounds, organic phosphorus compounds such as dichlorvos and fenitrothion, carbamate compounds such as propoxur, and neonicotinoid compounds such as dinotefuran, imidacloprid and clothianidin.
  • organic compounds organic phosphorus compounds such as dichlorvos and fenitrothion
  • carbamate compounds such as propoxur
  • neonicotinoid compounds such as dinotefuran, imidacloprid and clothianidin.
  • phthalthrin, praretrin and montfluorothrin which correspond to the nonvolatile pyrethroid compounds from the viewpoint of rapid action and safety, are preferred, and these nonvolatile pyrethroid compounds and (a) room temperature volatile pyrethroid insecticidal component It is preferable to use in combination with
  • the aerosol preparation for pest control of the present invention has a boiling point of 200 to 350 ° C. as an aid for reducing the sensitivity of (a) normal temperature volatile pyrethroid insecticidal component and in (b) normal temperature volatile pyrethroid insecticidal component in an aerosol stock solution. And a higher fatty acid ester having a boiling point of 200 to 350.degree. C. is blended in an amount of 1.0 to 15% by mass, preferably 3.6 to 8.0% by mass. That is, the glycol compound meeting the purpose of the present invention has a role as a volatilization regulator disclosed in Patent Document 1 and Patent Document 2 (it can be said that it is also a kind of efficacy enhancer since the persistence of pest control effect is enhanced).
  • a compound that enhances its inherent insecticidal effect against pyrethroid-sensitive pests is often referred to as a "potency enhancer", but in the present specification, it is a control effect when targeting pests with reduced sensitivity.
  • a compound that reduces the degree of decrease in the term “potency enhancer” is distinguished from the conventional "potency enhancer” and is defined as "sensitivity lowering coping agent”. Although the mechanism of action of the two is not clearly understood, the “potency enhancer” is not always the case for the “sensitivity lowering coping agent”.
  • the compounding quantity of the sensitivity fall coping adjuvant is less than 1.0 mass%, the effect which makes the fall degree of a pest control effect small becomes scarce.
  • the pest control effect not only reaches a plateau even if the content is more than 15% by mass, but it may affect the properties as an aqueous composition.
  • the glycol having 3 to 6 carbon atoms used as (b) sensitivity lowering coping aid has a boiling point of 200 to 350 ° C.
  • 1,3-butylene glycol Boiling point: 203 ° C
  • 1,4-butylene glycol Boiling point: 228 ° C
  • dipropylene glycol Boiling point: 230 ° C
  • 1,2-hexanediol Boiling point: 223 ° C
  • These glycols may be used alone or in combination of two or more.
  • a higher fatty acid ester having a boiling point of 200 to 350 ° C. is also useful as the (b) sensitivity lowering coping agent used for the pest control aerosol agent of the present invention.
  • Such compounds include isopropyl myristate (boiling point: 320 ° C.), methyl myristate (boiling point: 323 ° C.), hexyl laurate (boiling point: 332 ° C.), isopropyl laurate (boiling point: 280 ° C.) and the like.
  • These higher fatty acid esters may be used alone or in combination of two or more. It is also possible to mix and use one or more of the aforementioned glycols having 3 to 6 carbon atoms and one or more of higher fatty acid esters.
  • a lower alcohol having 1 to 3 carbon atoms preferably ethanol or isopropanol (IPA)
  • IPA isopropanol
  • the blending amount is 30 to 70% by mass
  • the blending amount is set to 46 to 61% by mass. If the blending amount exceeds 70% by mass, there is a concern that problems may occur in terms of safety against fire. On the other hand, when the compounding amount is less than 30% by mass, difficulties arise in terms of liquid stability of the aerosol composition.
  • solvents such as hydrocarbon solvents such as n-paraffin and isoparaffin, glycol ethers having 3 to 6 carbon atoms, ketone solvents and the like may be used as long as the effects of the present invention are not adversely affected. It is also possible to use. Lower alcohols are quick-drying and volatilize quickly after they adhere to the surface to be treated, so the treated surface is not sticky and there is no concern that the foot will slip during or immediately after spraying. Further, it has an advantage that it is easy to formulate an aqueous formulation containing water and, when the aerosol agent is prepared using a compressed gas as a propellant, it is easy to adjust the average particle diameter after spraying to 70 to 160 ⁇ m.
  • the aerosol preparation for pest control of the present invention employs a water-based formulation in which an aerosol stock solution is prepared with (d) water from the viewpoint of reducing the danger to fire and the phytotoxicity to plants as much as possible.
  • (D) The compounding amount of water is, from the aerosol stock solution, the above-mentioned sensitivity lowering coping agent of (a) room temperature volatile pyrethroid insecticide, (b) room temperature volatile pyrethroid insecticide, and (c) carbon number
  • the percentage by weight of the remainder excluding the lower alcohol of 1 to 3 is taken as about 30 to 70% by weight.
  • nonionic surfactant include, for example, ethers such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkyl amino ethers, etc.
  • ethers such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkyl amino ethers, etc.
  • Fatty acid esters such as polyethylene glycol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene styrenated phenols, polyalkarolamides of fatty acids, and the like.
  • the aerosol preparation for pest control of the present invention comprises, in addition to the above-mentioned components, a fungicide for acaricide, repellent, molds, fungi, etc., an antibacterial agent, a germicide, a stabilizer, a deodorant, an electrification agent. It is also possible to appropriately blend an inhibitor, an antifoaming agent, a flavor, an excipient and the like.
  • acaricide include methyl 5-chloro-2-trifluoromethanesulfonamide benzoate, phenyl salicylate, 3-iodo-2-propynyl butyl carbamate and the like.
  • repellent agent examples include terpene-based insect repellent flavors such as diethyl toluamide, icaridine, terpineol and geraniol.
  • Antifungal agents, antibacterial agents, and bactericidal agents include 2-mercaptobenzothiazole, 2- (4-thiazolyl) benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, trifolin, 3-methyl- 4-isopropylphenol, ortho-phenylphenol and the like.
  • the pest control aerosol agent of the present invention is prepared by filling the above-described aerosol stock solution and propellant into a pressure container.
  • propellant compressed gas (nitrogen gas, carbon dioxide gas, nitrous oxide, compressed air, etc.) can be suitably used, and further, unless the utility of the aerosol for pest control of the present invention is not impaired, liquefied petroleum It is also possible to use conventional propellants such as gas (LPG) and dimethyl ether (DME) in combination.
  • LPG gas
  • DME dimethyl ether
  • compressed gases nitrogen gas and carbon dioxide gas are easy to use, and nitrogen gas is particularly preferable.
  • the aerosol preparation for pest control of the present invention comprises (a) a room temperature volatile pyrethroid insecticidal component and (b) a room temperature volatile pyrethroid by making the average particle diameter of the aerosol stock solution after spraying roughly 70 to 160 ⁇ m. It was found that a barrier space was formed efficiently by the sensitivity reducing coping agent of the insecticidal component, and it could contribute to the enhancement of the control effect more effectively than the case where the average particle size of the aerosol stock solution after spraying was fine. .
  • the aerosol agent for pest control of the present invention may be provided with a valve, a button, a nozzle, a nozzle, etc. as appropriate depending on its use, purpose of use, target pest, etc.
  • a valve for example, an outdoor terrace or floor of a veranda (made of wood or concrete), a surface of a vinyl sheet installed outdoors, an outdoor ground, etc.
  • an injection button capable of inverted injection is provided.
  • an effective barrier space requires a certain processing area or more.
  • the treatment area is preferably 2 m or more ⁇ 2 m or more (4 m 2 or more), and more preferably 3 m or more ⁇ 3 m or more (9 m 2 or more).
  • the surface to be treated is set adjacent to a standing object such as the entrance of a veranda, a sash having a window or the entrance of a tent, the width of the surface to be treated along the standing object is set to 1.5 m or more. It is preferable to do.
  • the barrier space which may vary depending on environmental conditions, is defined as a space that covers the height from about 2 to 2.5 m from the surface to be treated (surface to be sprayed) being zero. .
  • Specific scenes to which the present invention is applied include entering and leaving the terrace and veranda, laundry drying, entering and leaving the entrance, outdoor life such as gardening at the garden tip, entering and leaving tents at camping, and outdoor barbecues, including those described above. And lunch scenes at picnics.
  • the aerosol preparation for controlling a pest according to the present invention is a pest having a reduced sensitivity, as well as pyrethroid susceptible lines outdoors, due to the combined effect of (a) a volatile volatile pyrethroid-type insecticidal component and (b) a sensitivity lowering coping agent.
  • a volatile volatile pyrethroid-type insecticidal component and (b) a sensitivity lowering coping agent.
  • it is extremely useful because it shows a practical control effect against mosquitoes such as house mosquitoes such as Culex pipiens f.
  • Example 1 (A) 0.22 g (0.12 mass%) of transfluthrin as a pyrethroid insecticidal component at normal temperature in a 200 mL pressure-resistant container, (b) 1,3-butylene glycol (boiling point as coping agent for lowering sensitivity) A mixture containing 8.0 g (4.5% by weight) of 203 ° C. and (c) 96 g (about 120 mL, 54% by weight) of ethanol is added, and (d) water is added to bring the total amount to 200 ml (178 g). did.
  • a valve part was attached to the container, and about 2 g of nitrogen gas was pressure-filled through the valve part, and an inverted jettable injection button was loaded to obtain the pest control aerosol agent of Example 1.
  • the average particle size of the spray particles was 94 ⁇ m when the contents of the aerosol were sprayed from the valve portion.
  • the pest control aerosol agent of Example 1 is applied for about 6 seconds so that about 19 mg (about 3.2 mg / m 2 ) of transfluthrin adheres to a wooden floor 2 m ⁇ 3 m adjacent to the entrance of the veranda. Inverted injection.
  • the average particle diameter of the spray particles sprayed from the valve portion of the aerosol agent is relatively coarse at about 94 ⁇ m as described above, the spray particles do not largely separate from the object to be treated and scatter, and as a result There was little risk of inhaling spray particles, and the spray processing could be performed safely. In addition, the spray particles were quick-drying, and there was no concern that the foot would slip on the treated floor.
  • Examples 2 to 9 and Comparative Examples 1 to 8 Various aerosols of Examples 2 to 9 shown in Table 1 were prepared according to Example 1, and adhesion test and control efficacy test shown below were conducted. Further, for comparison, the same tests as in the examples were conducted on the various aerosol agents of Comparative Examples 1 to 8 shown in Table 1. In addition, the content (mass%) of the (a) normal temperature volatile pyrethroid insecticidal component and the content (mass%) of the sensitivity lowering coping agent (b) shown in parentheses in Table 1 are those The specific gravity of was calculated as 1.0.
  • Repellency rate (%) [number of flying insects in the untreated area-number of flying insects in the treated area] / [number of flying insects in the untreated area] ⁇ 100
  • the pest control aerosol agent of the present invention which is prepared by filling an aerosol undiluted solution containing 70% by mass and (d) water with the balance by mass into a pressure-resistant container equipped with a jet button capable of inverted injection, 60% by mass or more of the aerosol stock solution adheres to the surface of the object to be treated, and then the component (a) and the component (b) gradually volatilize in the space above the surface of the object to be treated; Culex sensitive to insecticidal component, of course, even for Culex strains with reduced susceptibility, 3 hours or more, were observed excellent repellent effect for 12 hours.
  • 1,6-hexanediol correspond to (b) sensitivity lowering coping agents of the present invention
  • propylene glycols listed as volatilization regulators in Patent Document 1 and Patent Document 2 Comparative Example 3, boiling point: 188 C
  • ethylene glycol Comparative Example 4, boiling point: 197 ° C.
  • the pest control aerosol agent and pest control method of the present invention is effective not only against pests having high sensitivity to pyrethroid insecticidal components but also against pests having reduced sensitivity, particularly mosquitoes. It is very practical.
  • the aerosol controlling agent for controlling insect pests and the method for controlling insect pests according to the present invention can be suitably used for outdoor use, but can naturally also be used indoors, and can also be used for the purpose of controlling a wide range of insect pests is there.

Abstract

Provided is an aerosol for pest control that is for outdoor use, that exhibits excellent adhesion to a surface to be treated and effective formation of a barrier space, and that is effective against pests having reduced sensitivity to pyrethroid insecticidal components, particularly against mosquitoes. The aerosol for pest control is obtained by filling a pressure-resistant container provided with a spray button that can spray while inverted with an aerosol source liquid and a compressed gas. The aerosol source liquid comprises: (a) 0.01-3.0 mass% of a pyrethroid insecticidal component that is volatile at room temperature and that has a vapor pressure of 2×10-4 to 1×10-2 mmHg at 30°C; (b) 1.0-15 mass% of an auxiliary agent for combatting decreases in sensitivity to the pyrethroid insecticidal component that is volatile at room temperature, said auxiliary agent for combatting decreases in sensitivity being a glycol having 3-6 carbon atoms and a boiling point of 200-350°C and/or a higher fatty acid ester having a boiling point of 200-350°C; (c) 30-70 mass% of a lower alcohol having 1-3 carbon atoms; and (d) water constituting the remaining mass%.

Description

害虫防除用エアゾール剤、及び害虫防除方法Aerosol for pest control and pest control method
　本発明は、倒立噴射可能な噴射ボタンを備えた耐圧容器にエアゾール原液と圧縮ガスとを充填してなる害虫防除用エアゾール剤に関する。さらに、本発明は、ピレスロイド系殺虫成分に対する感受性が低下した害虫を防除する害虫防除方法に関する。 The present invention relates to an aerosol agent for controlling pests, which is obtained by filling an aerosol undiluted solution and a compressed gas in a pressure-resistant container provided with an injection button capable of inverted injection. Furthermore, the present invention relates to a pest control method for controlling pests having reduced sensitivity to pyrethroid insecticidal components.
　一般に、屋外で使用される害虫防除用エアゾール剤は、使用法により、（１）屋外空間を飛翔する害虫をめがけて噴霧する直撃タイプ、（２）木の茂みや葉の裏または物陰に隠れている害虫の防除を目的として、植物体または物陰、あるいはその近傍一体空間に噴霧するタイプ、（３）外壁、窓ガラス、地面等の固相表面にエアゾール殺虫剤を予め噴霧塗布しておき、害虫を待ち伏せるタイプに分類される。基本的には、（１）の直撃タイプは速効性を必要とするため、速効的なピレスロイド系殺虫成分であるフタルスリン等が汎用される。一方、（３）の待ち伏せタイプでは、残効性が求められることから、蒸気圧が低く揮散性の乏しい殺虫成分を使用することが多い。 In general, the pest control aerosol agent used outdoors is (1) a direct strike type that sprays for the purpose of flying a pest in the outdoor space according to usage, (2) hidden behind a bush or leaf or a shade of a tree For the purpose of controlling insect pests, the type that sprays on plant body or shade or the integral space near it, (3) Aerosol insecticide is spray applied beforehand on solid surfaces such as outer wall, window glass, ground, etc. It is classified into ambush type. Basically, since the direct strike type of (1) requires a rapid effect, phthalthrin, which is a rapid-acting pyrethroid insecticidal component, is widely used. On the other hand, in the case of the ambush type of (3), since residual effects are required, an insecticidal component having a low vapor pressure and a low volatility is often used.
　これに対し、近年、アウトドアライフと称して余暇を屋外（テラス、ベランダ等を含む）で過ごしたり、家庭園芸や庭仕事等に携わる人が増加している。それに伴い、木の茂みや物陰等の近辺で害虫、特にヤブ蚊に代表される蚊類に悩まされる機会が多くなり、上記（２）のタイプの害虫防除用エアゾール剤を求めるニーズが高まっている。 On the other hand, in recent years, people who spend their leisure time outdoors (including terraces, verandas, etc.) in the name of outdoor life, and people involved in home gardening, garden work, etc. are increasing. Along with this, opportunities for suffering from pests, especially mosquitoes typified by Yabu mosquitoes, increase in the vicinity of bushes and shades of trees, and the need for aerosol agents for controlling pests of the type (2) above is increasing. .
　上記（２）のタイプに関連して、比較的蒸気圧の高い殺虫成分を含有する水性エアゾール剤を害虫が飛翔する環境の固相面上に散布し、殺虫成分バリアを形成して飛翔害虫から人を予防的に防除しようとする試みがある。例えば、特許文献１（特許第４７０３１７２号公報）には、常温揮散性ピレスロイド系殺虫成分、炭素数１～３の低級アルコール、炭素数３～６のグリコール、及び水を含むエアゾール原液３０～７０容量％と、ジメチルエーテルを含む噴射剤３０～７０容量％とからなり、当該エアゾール原液のｐＨが５～７である屋外用一液性水性エアゾール剤を、テントの布一面に噴霧塗布したところ、テントの周囲にピレスロイド系殺虫成分のバリアを形成し、１０時間以上にわたって飛翔害虫のテント内への進入が阻止されたことが記載されている。しかしながら、特許文献１のエアゾール剤は、噴射剤としてＶＯＣを使用していることから、環境面において検討課題を残していた。 In relation to the type (2), an aqueous aerosol containing a relatively high vapor pressure insecticidal component is sprayed onto the solid phase surface of the environment where the pest flies, thereby forming an insecticidal component barrier from the flying pest There have been attempts to control people preventively. For example, Patent Document 1 (Japanese Patent No. 4703172) discloses an aerosol stock solution containing 30 to 70 volumes of an aerosol stock solution containing a normal temperature volatile pyrethroid insecticidal component, a lower alcohol having 1 to 3 carbon atoms, a glycol having 3 to 6 carbon atoms, and water. The outdoor one-component aqueous aerosol composition consisting of 30% to 70% by volume of a propellant containing dimethyl ether and having a pH of 5 to 7 of the aerosol stock solution is spray-coated on the entire cloth surface of the tent. It is described that a barrier of pyrethroid insecticidal component was formed in the periphery, and the entry of flying pests into the tent was prevented for 10 hours or more. However, since the aerosol agent of patent document 1 is using VOC as a propellant, it left the examination subject in the environmental aspect.
　また、特許文献２（特開２０１０－１６１９５７号公報）は、常温揮散性ピレスロイド系殺虫成分を含有し、噴射剤として圧縮ガスを充填してなるエアゾール剤を、その平均噴霧粒子径が５０～１５０μｍで、かつ処理対象面に前記常温揮散性ピレスロイド系殺虫成分の処理量が０．５ｍｇ／ｍ２以上になるように噴霧して、この処理対象面上方に前記常温揮散性ピレスロイド系殺虫成分のバリア空間を形成し、害虫のこの空間への侵入を６時間以上にわたり阻止するようになした害虫の侵入阻止方法を開示する。この特許文献２の技術は、特許文献１と比べると噴射剤としてジメチルエーテルの替わりに圧縮ガスを使用している点で環境に配慮がなされていると言える。そして、特許文献２には、前記常温揮散性ピレスロイド系殺虫成分の揮散調整剤として配合される炭素数３～６のグリコールが、前記ピレスロイド系殺虫成分の処理対象面への付着性を向上させるのに有用である旨が記載されている。 Further, Patent Document 2 (Japanese Patent Application Laid-Open No. 2010-161957) discloses an aerosol agent containing a pyrethroid insecticidal component at normal temperature volatilization and filled with a compressed gas as a propellant and having an average spray particle diameter of 50 to 150 μm. And the treatment target surface is sprayed so that the treatment amount of the room temperature volatile pyrethroid insecticidal component is 0.5 mg / m 2 or more, and the barrier of the room temperature volatile pyrethroid insecticidal component is above the surface to be treated Disclosed is a method for preventing the infestation of pests, which forms a space and is adapted to inhibit the infestation of pests into this space for more than six hours. It can be said that the technology of Patent Document 2 is environmentally friendly in that compressed gas is used instead of dimethyl ether as a propellant, as compared to Patent Document 1. Further, according to Patent Document 2, a glycol having 3 to 6 carbon atoms, which is blended as a volatilization regulator for the room temperature volatile pyrethroid insecticidal component, improves the adhesion of the pyrethroid insecticidal component to the surface to be treated. Is described as being useful.
　しかしながら、特許文献１及び特許文献２のいずれにおいても、それらの害虫に対する防除効果を確認する試験（ここで防除効果とは、殺虫効果、忌避効果、侵入阻止効果等を含む広義の概念）は、ピレスロイド系殺虫成分に対する感受性が低下していない害虫を対象としたものに限られ、感受性が低下した害虫、特に蚊類に対しては何ら言及されていなかった。 However, in any of Patent Document 1 and Patent Document 2, the test for confirming the control effect against pests (here, the control effect is a broad concept including an insecticidal effect, a repellent effect, an invasion preventing effect, etc.) It was limited to those for which the sensitivity to pyrethroid insecticidal components was not decreased, and no mention was made of the reduced sensitivity to insects, particularly mosquitoes.
特許第４７０３１７２号公報Patent No. 4703172 特開２０１０－１６１９５７号公報JP, 2010-161957, A
　本発明は、上記問題点に鑑みてなされたものであり、常温揮散性ピレスロイド系殺虫成分を含有するエアゾール剤をテラスやベランダ等の屋外の処理対象物に噴射後、この処理対象物の上方に前記常温揮散性ピレスロイド系殺虫成分のバリア空間を形成して害虫防除効果を発揮する害虫防除用エアゾール剤において、処理対象面への付着性やバリア空間の効果的な形成に優れるとともに、ピレスロイド系殺虫成分に対する感受性が低下した害虫、特に蚊類に対して有効な屋外用の害虫防除用エアゾール剤、及び当該害虫防除用エアゾール剤を用いた害虫防除方法を提供することを目的とする。 The present invention has been made in view of the above problems, and after spraying an aerosol agent containing a room temperature volatile pyrethroid-type insecticidal component onto an object to be treated outdoors such as a terrace or veranda, the spray agent is disposed above the object to be treated. In the aerosol agent for controlling insect pests, which exhibits a pest control effect by forming a barrier space of the above-mentioned normal temperature volatile pyrethroid insecticidal component, it is excellent in adhesion to the surface to be treated and effective formation of the barrier space, and pyrethroid insecticidal It is an object of the present invention to provide an outdoor pest control aerosol agent effective against pests having reduced sensitivity to components, particularly mosquitoes, and a pest control method using the pest control aerosol agent.
　本発明は、以下の構成が上記目的を達成するために優れた効果を奏することを見出したものである。
（１）倒立噴射可能な噴射ボタンを備えた耐圧容器にエアゾール原液と圧縮ガスとを充填してなる害虫防除用エアゾール剤であって、
　前記エアゾール原液は、
　（ａ）３０℃における蒸気圧が２×１０－４～１×１０－２ｍｍＨｇである常温揮散性ピレスロイド系殺虫成分を０．０１～３．０質量％、
　（ｂ）前記常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤として、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルを１．０～１５質量％、
　（ｃ）炭素数が１～３の低級アルコールを３０～７０質量％、並びに
　（ｄ）水を残部質量％
含有する害虫防除用エアゾール剤。
（２）前記噴射ボタンから、前記エアゾール原液を前記圧縮ガスとともに屋外の処理対象物に前記（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射したとき、前記エアゾール原液の６０質量％以上が前記処理対象物の表面に付着し、
　さらに、前記表面から、前記エアゾール原液に含まれる前記（ａ）常温揮散性ピレスロイド系殺虫成分が前記（ｂ）感受性低下対処助剤とともに３時間以上にわたり揮散するように構成されている（１）に記載の害虫防除用エアゾール剤。
（３）ピレスロイド系殺虫成分に対する感受性が低下した害虫を防除対象とする（１）又は（２）に記載の害虫防除用エアゾール剤。
（４）前記害虫は、蚊類である（３）に記載の害虫防除用エアゾール剤。
（５）前記常温揮散性ピレスロイド系殺虫成分は、トランスフルトリン、メトフルトリン、及びプロフルトリンからなる群から選択される少なくとも一種である（１）～（４）の何れか一つに記載の害虫防除用エアゾール剤。
（６）前記感受性低下対処助剤は、１，３－ブチレングリコール、１，４－ブチレングリコール、ミリスチン酸イソプロピル、及びラウリン酸ヘキシルからなる群から選択される少なくとも一種である（１）～（５）の何れか一つに記載の害虫防除用エアゾール剤。
（７）前記噴射ボタンから倒立噴射された前記エアゾール原液の平均粒子径は、７０～１６０μｍである（１）～（６）の何れか一つに記載の害虫防除用エアゾール剤。
（８）前記処理対象物は、屋外のテラスの床面、屋外のベランダの床面、屋外に設置されたビニルシートの表面、又は屋外地面である（２）～（７）の何れか一つに記載の害虫防除用エアゾール剤。
（９）ピレスロイド系殺虫成分に対する感受性が低下した害虫を防除する害虫防除方法であって、
　（１）～（８）の何れか一つに記載の害虫防除用エアゾール剤を、屋外の処理対象物に前記（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射する噴射工程と、
　前記処理対象物の表面に付着した前記エアゾール原液に含まれる前記（ａ）常温揮散性ピレスロイド系殺虫成分を前記（ｂ）感受性低下対処助剤とともに、前記表面から３時間以上にわたり揮散させる揮散工程と、
を包含する害虫防除方法。
（１０）前記害虫は、蚊類である（９）に記載の害虫防除方法。 The present invention has been found out that the following constitution has excellent effects to achieve the above object.
(1) It is an aerosol agent for pest control formed by filling an aerosol undiluted solution and compressed gas in a pressure-resistant container provided with an injection button capable of being injected in an inverted direction,
The aerosol stock solution is
(A) 0.01 to 3.0% by mass of a room temperature volatile pyrethroid insecticidal component having a vapor pressure of 2 × 10 −4 to 1 × 10 −2 mmHg at 30 ° C.
(B) A glycol having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or a higher fatty acid ester having a boiling point of 200 to 350 ° C. as a coping agent for reducing the sensitivity of the above-mentioned normal temperature volatile pyrethroid insecticidal component 1.0 to 15% by mass,
(C) 30 to 70% by mass of a lower alcohol having 1 to 3 carbon atoms, and (d) the remaining mass% of water
Aerosol for pest control contained.
(2) The aerosol undiluted solution together with the compressed gas is treated with the compressed gas onto the object to be treated outdoors from the injection button so that the treated amount of the normal temperature volatile pyrethroid insecticidal component is 0.5 to 20 mg / m 2. When sprayed, 60% by mass or more of the aerosol stock solution adheres to the surface of the object to be treated,
Furthermore, from the surface, the (a) room temperature volatile pyrethroid insecticidal component contained in the aerosol stock solution is volatilized along with the (b) sensitivity lowering coping agent for three hours or more. Aerosol agent for pest control as described.
(3) The aerosol agent for pest control according to (1) or (2), wherein the pest whose sensitivity to a pyrethroid insecticidal component is reduced is a control target.
(4) The aerosol agent for pest control according to (3), wherein the pest is a mosquito.
(5) The pest control according to any one of (1) to (4), wherein the room temperature volatile pyrethroid insecticidal component is at least one selected from the group consisting of transfluthrin, metfluthrin, and profluthrin Aerosol agent.
(6) The sensitivity reducing coagent is at least one selected from the group consisting of 1,3-butylene glycol, 1,4-butylene glycol, isopropyl myristate, and hexyl laurate (1) to (5) The aerosol agent for pest control according to any one of the above.
(7) The aerosol preparation for pest control according to any one of (1) to (6), wherein the average particle diameter of the aerosol stock solution injected in an inverted manner from the injection button is 70 to 160 μm.
(8) The object to be treated is any one of (2) to (7), which is the floor surface of an outdoor terrace, the floor surface of an outdoor veranda, the surface of a vinyl sheet installed outdoors, or the outdoor ground. The aerosol agent for pest control as described in-.
(9) A pest control method for controlling a pest whose sensitivity to a pyrethroid insecticidal component is reduced,
The treated aerosol of the pest agent for pest control according to any one of (1) to (8) is applied to an object to be treated outdoors at a treatment amount of 0.5 to 20 mg / m of the (a) room temperature volatile pyrethroid insecticidal component An injection step of upside-down injection so as to be 2 ;
A volatilization step of volatilizing the (a) normal temperature volatilizable pyrethroid insecticidal component contained in the aerosol stock solution attached to the surface of the object to be treated together with the (b) sensitivity lowering coping agent for at least 3 hours from the surface; ,
A pest control method including:
(10) The pest control method according to (9), wherein the pest is a mosquito.
　本発明の害虫防除用エアゾール剤、及び害虫防除方法によれば、エアゾール原液として、（ａ）３０℃における蒸気圧が２×１０－４～１×１０－２ｍｍＨｇである常温揮散性ピレスロイド系殺虫成分を０．０１～３．０質量％、（ｂ）常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤として、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルを１．０～１５質量％、（ｃ）炭素数が１～３の低級アルコールを３０～７０質量％、並びに（ｄ）水を残部質量％含有するものを使用し、噴射ボタンから、エアゾール原液を圧縮ガスとともに屋外の処理対象物に（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射し、エアゾール原液の６０質量％以上を処理対象物の表面に付着させると、その後、（ａ）常温揮散性ピレスロイド系殺虫成分が（ｂ）感受性低下対処助剤とともに処理対象物の表面から揮散する際、３時間以上にわたって処理対象物の上方に害虫を防除するバリア空間が形成される。その結果、ピレスロイド系殺虫成分に対して感受性が高い害虫については勿論、ピレスロイド系殺虫成分に対して感受性が低下した害虫（特に、蚊類）に対しても、優れた防除効果を発揮することができる。 According to the aerosol preparation for pest control and pest control method of the present invention, as the aerosol stock solution, (a) a vapor pressure at 30 ° C. of 2 × 10 −4 to 1 × 10 −2 mmHg at normal temperature volatilizable pyrethroid insecticide 0.01 to 3.0 mass% of the component, (b) a glycol having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or a boiling point as a coping agent for reducing the sensitivity of the pyrethroid insecticidal component at normal temperature volatilization Containing 1.0 to 15% by mass of a higher fatty acid ester having a temperature of 200 to 350 ° C., (c) 30 to 70% by mass of a lower alcohol having 1 to 3 carbon atoms, and (d) the balance of water using, from the injection button, an inverted injection as treatment of (a) ambient temperature volatile pyrethroid insecticide component outdoors of the processing object with the compressed gas aerosol stock solution is 0.5 ~ 20mg / m 2 When 60% by mass or more of the aerosol stock solution adheres to the surface of the object to be treated, then (a) the normal temperature volatile pyrethroid insecticidal component volatilizes from the surface of the object to be treated with the (b) sensitivity lowering coping agent. A barrier space for controlling pests is formed above the object to be treated for 3 hours or more. As a result, not only pests that are highly sensitive to pyrethroid-type insecticidal components, but also pests that exhibit reduced sensitivity to pyrethroid-type insecticidal components (especially mosquitoes) can exhibit excellent control effects. it can.
　近年、ピレスロイド系殺虫成分に対し感受性が低下した蚊類等の害虫が世界の至る所で出現し、その防除対策が急務となっている。感受性の低下が害虫における代謝酵素の活性化に起因する場合、ピペロニルブトキサイドの配合が有効と言われているが、これに替わる有用な化合物は未だ提案されていない。本発明者らは、屋外用水性エアゾール剤が蚊類防除手段として広く浸透している現状を鑑み、先に挙げた特許文献１や特許文献２の技術を見直し、鋭意検討を重ねた。その結果、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルが、ピレスロイド系殺虫成分に対する感受性が低下した害虫、特に蚊類に対して特異的に有効で、その作用を感受性低下対処助剤として活用できることを知見し、本発明を完成するに至ったものである。 In recent years, insect pests such as mosquitoes whose sensitivity to pyrethroid-type insecticidal components has been reduced appear all over the world, and its control measures are urgently needed. It has been suggested that piperonyl butoxide combination is effective when the reduced sensitivity is due to the activation of metabolic enzymes in pests, but no alternative useful compound has yet been proposed. The present inventors reviewed the techniques of Patent Document 1 and Patent Document 2 listed above, and conducted earnestly investigations, in light of the current situation in which outdoor aerosols are widely used as means for controlling mosquitoes. As a result, glycols having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or higher fatty acid esters having a boiling point of 200 to 350 ° C. are less susceptible to pyrethroid insecticidal components, particularly mosquitoes. It has been found that the present invention is effective specifically for the present invention and that its action can be used as an aid for coping with reduced sensitivity, resulting in the completion of the present invention.
　本発明の害虫防除用エアゾール剤は、屋外用の水性エアゾール剤であり、エアゾール原液中に（ａ）３０℃における蒸気圧が２×１０－４～１×１０－２ｍｍＨｇである常温揮散性ピレスロイド系殺虫成分を０．０１～３．０質量％、好ましくは０．０８～０．１７質量％含有する。ピレスロイド系殺虫成分としては、例えば、トランスフルトリン、メトフルトリン、プロフルトリン、エムペントリン、フラメトリン、テラレスリン、ジメフルトリン、メパフルトリン、ヘプタフルトリン等が挙げられる。これらのうち、常温揮散性、害虫防除効力、安定性、化合物の入手性等を考慮すると、トランスフルトリン、メトフルトリン、及びプロフルトリンが好ましく、トランスフルトリンがより好ましい。上掲のピレスロイド系殺虫成分は、単独で使用してもよいし、複数種を混合した状態で使用してもよい。また、ピレスロイド系殺虫成分において、酸部分やアルコール部分に不斉炭素に基づく光学異性体や幾何異性体が存在する場合、それら各々や任意の混合物も本発明で使用可能なピレスロイド系殺虫成分に含まれる。（ａ）常温揮散性ピレスロイド系殺虫成分の含有量が０．０１質量％未満の場合、害虫防除効力が劣る懸念があり、一方、３．０質量％を超えると水性エアゾール剤組成物の性状に支障を来す可能性がある。 The aerosol agent for pest control of the present invention is an aqueous aerosol agent for outdoor use, and it is a room temperature volatile pyrethroid having a vapor pressure of 2 × 10 -4 to 1 × 10 -2 mmHg at 30 ° C in the aerosol stock solution (a) The pesticidal component is contained in an amount of 0.01 to 3.0% by mass, preferably 0.08 to 0.17% by mass. Examples of pyrethroid insecticidal components include transfluthrin, metfluthrin, profluthrin, empentrin, framethrin, terarethrin, dimefluthrin, mepafluthrin, heptafluthrin and the like. Among these, transfluthrin, metfluthrin and profluthrin are preferable, and transfluthrin is more preferable, in consideration of normal temperature volatilization, pest control efficacy, stability, availability of compounds, and the like. The above-mentioned pyrethroid insecticidal components may be used alone or in combination of two or more. In the pyrethroid insecticidal component, when an optical isomer or geometric isomer based on asymmetric carbon is present in the acid moiety or alcohol portion, each of them or any mixture thereof is also included in the pyrethroid insecticidal component usable in the present invention Be (A) If the content of the normal temperature volatile pyrethroid insecticidal component is less than 0.01% by mass, there is a concern that the pest control efficacy is inferior, while if it exceeds 3.0% by mass, the properties of the aqueous aerosol composition There is a possibility of hindrance.
　本発明で用いる（ａ）常温揮散性ピレスロイド系殺虫成分は、種々の飛翔害虫又は匍匐害虫に対して、直撃効果及び接触効果を示す。さらに、噴射固相面（処理対象物）から常温揮散性ピレスロイド系殺虫成分が徐々に揮散して固相面上方の環境空間に殺虫成分バリアを形成するので、飛翔害虫の予防的防除に効果的に寄与し得る。なお、本発明では、殺虫効果、ノックダウン効果、忌避効果、害虫侵入阻止効果等を総合的に含めて害虫防除効果と称することとする。 The normal temperature volatile pyrethroid insecticidal component (a) used in the present invention exhibits a direct impact effect and a contact effect on various flying pests and pests. Furthermore, the pyrogenic type insecticidal component at room temperature volatilizes gradually from the jetted solid phase surface (object to be treated) to form an insecticidal component barrier in the environmental space above the solid phase surface, which is effective for preventive control of flying pests. Can contribute to In the present invention, the insecticidal effect, the knockdown effect, the repellent effect, the pest invasion inhibitory effect and the like are comprehensively referred to as a pest control effect.
　本発明の害虫防除用エアゾール剤は、害虫に対する直撃効果を期待する場面でこれを補強するために、（ａ）常温揮散性ピレスロイド系殺虫成分に加え、他の殺虫成分を適宜配合してもよい。そのような殺虫成分としては、フタルスリン、レスメトリン、シフルトリン、フェノトリン、ペルメトリン、シフェノトリン、シペルメトリン、アレスリン、プラレトリン、イミプロトリン、モンフルオロトリン、エトフェンプロックス等の難揮散性ピレスロイド系化合物、シラフルオフェン等のケイ素系化合物、ジクロルボス、フェニトロチオン等の有機リン系化合物、プロポクスル等のカーバメート系化合物、ジノテフラン、イミダクロプリド、クロチアニジン等のネオニコチノイド系化合物等が挙げられる。これらのうち、速効性と安全性の点から難揮散性ピレスロイド系化合物に該当するフタルスリン、プラレトリン、モンフルオロトリンが好ましく、これらの難揮散性ピレスロイド系化合物と（ａ）常温揮散性ピレスロイド系殺虫成分とを併用することが好ましい。 In addition to the (a) normal temperature volatile pyrethroid insecticidal component, another insecticidal component may be appropriately blended to reinforce the pest control aerosol agent of the present invention in a situation where a direct impact effect on the insect pest is expected. . As such an insecticidal component, silicon such as phthalosulin, resmethrin, phenthrin, permethrin, cyfenothrin, cypermethrin, allethrin, prarethrin, imiprothrin, monfluorothrin, etofenprox, etc., pyrogenic compounds such as pyrethroid compounds, silafluophene, etc. Examples thereof include organic compounds, organic phosphorus compounds such as dichlorvos and fenitrothion, carbamate compounds such as propoxur, and neonicotinoid compounds such as dinotefuran, imidacloprid and clothianidin. Among these, phthalthrin, praretrin and montfluorothrin, which correspond to the nonvolatile pyrethroid compounds from the viewpoint of rapid action and safety, are preferred, and these nonvolatile pyrethroid compounds and (a) room temperature volatile pyrethroid insecticidal component It is preferable to use in combination with
　本発明の害虫防除用エアゾール剤は、（ａ）常温揮散性ピレスロイド系殺虫成分とともに、エアゾール原液中に（ｂ）常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤として、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルを１．０～１５質量％、好ましくは３．６～８．０質量％配合する。すなわち、本発明の目的に合致するグリコール化合物は、特許文献１や特許文献２に開示された揮散調整剤（害虫防除効果の持続性を高めているので一種の効力増強剤とも言える）としての役目ではなく、ピレスロイド系殺虫成分の感受性低下対処助剤として作用し得るものである。従来、ピレスロイド感受性の害虫に対し、その本来の殺虫効果を増強させる化合物を「効力増強剤」と称することが多いが、本明細書においては、感受性が低下した害虫を対象とした場合に防除効果の低下度合を軽減するような化合物を、従来の「効力増強剤」と区別し、「感受性低下対処助剤」と定義する。両者の作用メカニズムは明確に解明されているわけではないが、「効力増強剤」が必ずしも「感受性低下対処助剤」に該当するとは限らない。なお、感受性低下対処助剤の配合量が１．０質量％未満であると、害虫防除効果の低下度合を小さくする効果が乏しくなる。一方、１５質量％を超えて配合しても害虫防除効果が頭打ちとなるばかりか、水性組成物としての性状に影響を及ぼす懸念がある。 The aerosol preparation for pest control of the present invention has a boiling point of 200 to 350 ° C. as an aid for reducing the sensitivity of (a) normal temperature volatile pyrethroid insecticidal component and in (b) normal temperature volatile pyrethroid insecticidal component in an aerosol stock solution. And a higher fatty acid ester having a boiling point of 200 to 350.degree. C. is blended in an amount of 1.0 to 15% by mass, preferably 3.6 to 8.0% by mass. That is, the glycol compound meeting the purpose of the present invention has a role as a volatilization regulator disclosed in Patent Document 1 and Patent Document 2 (it can be said that it is also a kind of efficacy enhancer since the persistence of pest control effect is enhanced). However, it can act as a coping agent for reducing the sensitivity of pyrethroid insecticidal components. Conventionally, a compound that enhances its inherent insecticidal effect against pyrethroid-sensitive pests is often referred to as a "potency enhancer", but in the present specification, it is a control effect when targeting pests with reduced sensitivity. A compound that reduces the degree of decrease in the term "potency enhancer" is distinguished from the conventional "potency enhancer" and is defined as "sensitivity lowering coping agent". Although the mechanism of action of the two is not clearly understood, the “potency enhancer” is not always the case for the “sensitivity lowering coping agent”. In addition, when the compounding quantity of the sensitivity fall coping adjuvant is less than 1.0 mass%, the effect which makes the fall degree of a pest control effect small becomes scarce. On the other hand, there is a concern that the pest control effect not only reaches a plateau even if the content is more than 15% by mass, but it may affect the properties as an aqueous composition.
　本発明の害虫防除用エアゾール剤において、（ｂ）感受性低下対処助剤として用いる炭素数が３～６のグリコールは、沸点が２００～３５０℃であり、具体的には、１，３－ブチレングリコール（沸点：２０３℃）、１，４－ブチレングリコール（沸点：２２８℃）、ジプロピレングリコール（沸点：２３０℃）、１，２－ヘキサンジオール（沸点：２２３℃）、１，６－ヘキサンジオール（沸点：２５０℃）等が挙げられる。これらのグリコールは、単独で使用してもよいし、複数種を混合した状態で使用してもよい。なお、特許文献１や特許文献２で揮散調整剤として記載されていたプロピレングリコール（沸点：１８８℃）やエチレングリコール（沸点：１９７℃）は、「感受性低下対処助剤」としてはそれほど有効でないことが認められ、「効力増強剤」が必ずしも「感受性低下対処助剤」に該当しないことが判明した。 In the aerosol preparation for pest control of the present invention, the glycol having 3 to 6 carbon atoms used as (b) sensitivity lowering coping aid has a boiling point of 200 to 350 ° C. Specifically, 1,3-butylene glycol (Boiling point: 203 ° C), 1,4-butylene glycol (boiling point: 228 ° C), dipropylene glycol (boiling point: 230 ° C), 1,2-hexanediol (boiling point: 223 ° C), 1,6-hexanediol Boiling point: 250 ° C.) and the like. These glycols may be used alone or in combination of two or more. Note that propylene glycol (boiling point: 188 ° C) and ethylene glycol (boiling point: 197 ° C) described as volatilization regulators in Patent Document 1 and Patent Document 2 are not so effective as "sensitivity lowering coping agents". It was found that “potency enhancers” do not necessarily fall under “sensitivity lowering coping agents”.
　本発明の害虫防除用エアゾール剤に用いる（ｂ）感受性低下対処助剤としては、沸点が２００～３５０℃である高級脂肪酸エステルも有用である。かかる化合物としては、ミリスチン酸イソプロピル（沸点：３２０℃）、ミリスチン酸メチル（沸点：３２３℃）、ラウリン酸ヘキシル（沸点：３３２℃）、ラウリン酸イソプロピル（沸点：２８０℃）等が挙げられる。これらの高級脂肪酸エステルは、単独で使用してもよいし、複数種を混合した状態で使用してもよい。また、前述の炭素数が３～６のグリコールの一種以上と、高級脂肪酸エステルの一種以上とを混合して使用することも可能である。 A higher fatty acid ester having a boiling point of 200 to 350 ° C. is also useful as the (b) sensitivity lowering coping agent used for the pest control aerosol agent of the present invention. Such compounds include isopropyl myristate (boiling point: 320 ° C.), methyl myristate (boiling point: 323 ° C.), hexyl laurate (boiling point: 332 ° C.), isopropyl laurate (boiling point: 280 ° C.) and the like. These higher fatty acid esters may be used alone or in combination of two or more. It is also possible to mix and use one or more of the aforementioned glycols having 3 to 6 carbon atoms and one or more of higher fatty acid esters.
　本発明の害虫防除用エアゾール剤は、エアゾール原液中に溶剤として（ｃ）炭素数が１～３の低級アルコール、好ましくはエタノールやイソプロパノール（ＩＰＡ）が配合され、その配合量は３０～７０質量％、好ましくは４６～６１質量％に設定される。配合量が７０質量％を超えると火気に対する安全性の点で問題を生じる懸念がある。一方、配合量が３０質量％未満であるとエアゾール組成物の液性安定化の点で困難を伴う。なお、本発明の作用効果に支障を来たさない限りにおいて、他の溶剤、例えば，ｎ－パラフィン、イソパラフィン等の炭化水素系溶剤、炭素数３～６のグリコールエーテル類、ケトン系溶剤等を使用することも可能である。低級アルコール類は、速乾性で処理対象面に付着後速やかに揮発するため、処理面がべたつくことがなく、噴射時や噴射直後に足が滑るという懸念を生じない。また、水を配合した水性処方化が容易な上、噴射剤として圧縮ガスを用いてエアゾール剤を調製したときに、噴霧後の平均粒子径を７０～１６０μｍに調整し易いというメリットも有する。 In the aerosol preparation for pest control of the present invention, (c) a lower alcohol having 1 to 3 carbon atoms, preferably ethanol or isopropanol (IPA), is blended as a solvent in the aerosol stock solution, and the blending amount is 30 to 70% by mass Preferably, it is set to 46 to 61% by mass. If the blending amount exceeds 70% by mass, there is a concern that problems may occur in terms of safety against fire. On the other hand, when the compounding amount is less than 30% by mass, difficulties arise in terms of liquid stability of the aerosol composition. In addition, other solvents such as hydrocarbon solvents such as n-paraffin and isoparaffin, glycol ethers having 3 to 6 carbon atoms, ketone solvents and the like may be used as long as the effects of the present invention are not adversely affected. It is also possible to use. Lower alcohols are quick-drying and volatilize quickly after they adhere to the surface to be treated, so the treated surface is not sticky and there is no concern that the foot will slip during or immediately after spraying. Further, it has an advantage that it is easy to formulate an aqueous formulation containing water and, when the aerosol agent is prepared using a compressed gas as a propellant, it is easy to adjust the average particle diameter after spraying to 70 to 160 μm.
　本発明の害虫防除用エアゾール剤は、火気に対する危険性や植物に対する薬害をできる限り低減させる観点から、エアゾール原液を（ｄ）水で調製した水性化処方を採用する。（ｄ）水の配合量は、エアゾール原液から、上述の（ａ）常温揮散性ピレスロイド系殺虫成分、（ｂ）常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤、及び（ｃ）炭素数が１～３の低級アルコールを除いた残部の質量％とするが、３０～７０質量％程度が好ましい。また、本発明の害虫防除用エアゾール剤の特性を妨げない限りにおいて、可溶化助剤として若干量の非イオン系界面活性剤を添加することができる。このような、非イオン系界面活性剤としては、例えば、ポリオキシエチレンアルキルエーテル類、ポリオキシエチレンアルキルフェニルエーテル類、ポリオキシエチレンポリオキシプロピレンアルキルエーテル類、ポリオキシエチレンアルキルアミノエーテル類などのエーテル類、ポリエチレングリコール脂肪酸エステル類、ポリオキシエチレンソルビタン脂肪酸エステル類、ポリオキシエチレングリセリン脂肪酸エステル類などの脂肪酸エステル類、ポリオキシエチレンスチレン化フェノール、脂肪酸のポリアルカロールアミド等が挙げられる。 The aerosol preparation for pest control of the present invention employs a water-based formulation in which an aerosol stock solution is prepared with (d) water from the viewpoint of reducing the danger to fire and the phytotoxicity to plants as much as possible. (D) The compounding amount of water is, from the aerosol stock solution, the above-mentioned sensitivity lowering coping agent of (a) room temperature volatile pyrethroid insecticide, (b) room temperature volatile pyrethroid insecticide, and (c) carbon number The percentage by weight of the remainder excluding the lower alcohol of 1 to 3 is taken as about 30 to 70% by weight. In addition, as long as the properties of the pest control aerosol agent of the present invention are not impaired, a slight amount of nonionic surfactant can be added as a solubilization aid. Such non-ionic surfactants include, for example, ethers such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkyl amino ethers, etc. Fatty acid esters such as polyethylene glycol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene styrenated phenols, polyalkarolamides of fatty acids, and the like.
　本発明の害虫防除用エアゾール剤は、前記各成分に加え、殺ダニ剤、忌避剤、カビ類、菌類等を対象とした防カビ剤、抗菌剤、殺菌剤、安定剤、消臭剤、帯電防止剤、消泡剤、香料、賦形剤等を適宜配合することも可能である。殺ダニ剤としては、５－クロロ－２－トリフルオロメタンスルホンアミド安息香酸メチル、サリチル酸フェニル、３－ヨード－２－プロピニルブチルカーバメート等が挙げられる。忌避剤としては、ジエチルトルアミド、イカリジン、テルピネオールやゲラニオール等のテルペン系虫よけ香料等が挙げられる。防カビ剤、抗菌剤、殺菌剤としては、２－メルカプトベンゾチアゾール、２－（４－チアゾリル）ベンツイミダゾール、５－クロロ－２－メチル－４－イソチアゾリン－３－オン、トリホリン、３－メチル－４－イソプロピルフェノール、オルト－フェニルフェノール等が挙げられる。 The aerosol preparation for pest control of the present invention comprises, in addition to the above-mentioned components, a fungicide for acaricide, repellent, molds, fungi, etc., an antibacterial agent, a germicide, a stabilizer, a deodorant, an electrification agent. It is also possible to appropriately blend an inhibitor, an antifoaming agent, a flavor, an excipient and the like. Examples of the acaricide include methyl 5-chloro-2-trifluoromethanesulfonamide benzoate, phenyl salicylate, 3-iodo-2-propynyl butyl carbamate and the like. Examples of the repellent agent include terpene-based insect repellent flavors such as diethyl toluamide, icaridine, terpineol and geraniol. Antifungal agents, antibacterial agents, and bactericidal agents include 2-mercaptobenzothiazole, 2- (4-thiazolyl) benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, trifolin, 3-methyl- 4-isopropylphenol, ortho-phenylphenol and the like.
　本発明の害虫防除用エアゾール剤は、上記したエアゾール原液と噴射剤を耐圧容器に充填して調製される。噴射剤としては、圧縮ガス（窒素ガス、炭酸ガス、亜酸化窒素、圧縮空気等）を好適に使用することができ、さらに、本発明の害虫防除用エアゾールの有用性を妨げない限り、液化石油ガス（ＬＰＧ）やジメチルエーテル（ＤＭＥ）等の従来の噴射剤を併用することも可能である。圧縮ガスの中では、窒素ガスや炭酸ガスが使い易く、特に窒素ガスが好適である。噴射剤として圧縮ガスを使用すると、噴射処理時の霧の飛散及び付着効率を改善し、噴霧粒子径を粗くし、火気に対する安全性を高め、噴霧粒子の吸入危険性を軽減させることができる。液化石油ガス（ＬＰＧ）やジメチルエーテル（ＤＭＥ）を併用した場合は、液性を安定化させることができる。さらに、本発明の害虫防除用エアゾール剤は、噴射後のエアゾール原液の平均粒子径を７０～１６０μｍ程度に粗くすることによって、（ａ）常温揮散性ピレスロイド系殺虫成分と（ｂ）常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤とによるバリア空間が効率的に形成され、噴射後のエアゾール原液の平均粒子径が細かい場合よりも効果的に防除効果の増強に寄与し得ることが認められた。 The pest control aerosol agent of the present invention is prepared by filling the above-described aerosol stock solution and propellant into a pressure container. As the propellant, compressed gas (nitrogen gas, carbon dioxide gas, nitrous oxide, compressed air, etc.) can be suitably used, and further, unless the utility of the aerosol for pest control of the present invention is not impaired, liquefied petroleum It is also possible to use conventional propellants such as gas (LPG) and dimethyl ether (DME) in combination. Among compressed gases, nitrogen gas and carbon dioxide gas are easy to use, and nitrogen gas is particularly preferable. The use of compressed gas as the propellant can improve the efficiency of mist scattering and adhesion during the injection process, roughen the spray particle size, enhance the safety against fire, and reduce the inhalation risk of the spray particles. When liquefied petroleum gas (LPG) or dimethyl ether (DME) is used in combination, the liquid properties can be stabilized. Furthermore, the aerosol preparation for pest control of the present invention comprises (a) a room temperature volatile pyrethroid insecticidal component and (b) a room temperature volatile pyrethroid by making the average particle diameter of the aerosol stock solution after spraying roughly 70 to 160 μm. It was found that a barrier space was formed efficiently by the sensitivity reducing coping agent of the insecticidal component, and it could contribute to the enhancement of the control effect more effectively than the case where the average particle size of the aerosol stock solution after spraying was fine. .
　本発明の害虫防除用エアゾール剤は、その用途、使用目的、対象害虫等に応じて、適宜バルブ、ボタン、噴口、ノズル等を設けることができるが、処理対象物が主に屋外の固相面（例えば、屋外のテラスやベランダの床面（木製又はコンクリート製）、屋外に設置されたビニルシートの表面、屋外地面など）であることを考慮して、倒立噴射可能な噴射ボタンが設けられる。この場合、噴射ボタンから、エアゾール原液を圧縮ガスとともに屋外の固相面に（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射したとき、エアゾール原液の６０質量％以上が固相面に付着し、さらに、固相面から、エアゾール原液に含まれる（ａ）常温揮散性ピレスロイド系殺虫成分が（ｂ）感受性低下対処助剤とともに３時間以上にわたり揮散するように構成されている。 Although the aerosol agent for pest control of the present invention may be provided with a valve, a button, a nozzle, a nozzle, etc. as appropriate depending on its use, purpose of use, target pest, etc. In consideration of being (for example, an outdoor terrace or floor of a veranda (made of wood or concrete), a surface of a vinyl sheet installed outdoors, an outdoor ground, etc.), an injection button capable of inverted injection is provided. In this case, when the undiluted aerosol solution and compressed gas are applied to the solid phase surface of the outdoor from the injection button (a) in such a manner that the treatment amount of pyrogenic type insecticidal component at normal temperature is 0.5 to 20 mg / m 2 , 60% by mass or more of the aerosol stock solution adheres to the solid phase surface, and from the solid phase surface, (a) normal temperature volatile pyrethroid insecticidal component contained in the aerosol stock solution for 3 hours or more together with (b) sensitivity lowering coping agent Are configured to volatilize.
　有効なバリア空間の形成には一定以上の処理面積が必要とされる。例えば、処理対象面が平坦な面である場合、処理面積は２ｍ以上×２ｍ以上（４ｍ２以上）とするのが好ましく、３ｍ以上×３ｍ以上（９ｍ２以上）がより好ましい。一方、ベランダの出入り口、窓を有するサッシあるいはテントの出入り口などの立設物に隣接して処理対象面が設定される場合、立設物に沿った処理対象面の幅を１．５ｍ以上として噴射するのが好ましい。なお、バリア空間とは、環境条件によって変動し得るものであるが、処理対象面（噴霧される面）をゼロとして、そこから２～２．５ｍ程度までの高さをカバーする空間と定義する。 The formation of an effective barrier space requires a certain processing area or more. For example, when the surface to be treated is flat, the treatment area is preferably 2 m or more × 2 m or more (4 m 2 or more), and more preferably 3 m or more × 3 m or more (9 m 2 or more). On the other hand, when the surface to be treated is set adjacent to a standing object such as the entrance of a veranda, a sash having a window or the entrance of a tent, the width of the surface to be treated along the standing object is set to 1.5 m or more. It is preferable to do. The barrier space, which may vary depending on environmental conditions, is defined as a space that covers the height from about 2 to 2.5 m from the surface to be treated (surface to be sprayed) being zero. .
　本発明が適用される具体的な場面としては、上記したものを含め、テラスやベランダの出入り、洗濯物干し、玄関の出入り、庭先でのガーデニング等のアウトドアライフ、キャンプでのテントの出入り、野外バーベキュー、ピクニックでの昼食場面等が挙げられる。 Specific scenes to which the present invention is applied include entering and leaving the terrace and veranda, laundry drying, entering and leaving the entrance, outdoor life such as gardening at the garden tip, entering and leaving tents at camping, and outdoor barbecues, including those described above. And lunch scenes at picnics.
　本発明の害虫防除用エアゾール剤は、（ａ）常温揮散性ピレスロイド系殺虫成分と（ｂ）感受性低下対処助剤との併用効果によって、屋外において、ピレスロイド感受性系統は勿論、感受性が低下した害虫、特に、アカイエカ、コガタアカイエカ、ネッタイイエカ、チカイエカ等のイエカ類、ヒトスジシマカ、ネッタイシマカ等のヤブカ類、ユスリカ類等の蚊類に対して実用的な防除効果を示すので極めて有用性が高い。なお、このような効果は、イエバエ類、チョウバエ類、ブユ類、アブ類、ヌカカ類、ハチ類、ヨコバイ類などの各種飛翔害虫や、アリ類、ダンゴムシ、ワラジムシなどの匍匐害虫に対しても少なからず認められるが、特に蚊類について特徴的である。 The aerosol preparation for controlling a pest according to the present invention is a pest having a reduced sensitivity, as well as pyrethroid susceptible lines outdoors, due to the combined effect of (a) a volatile volatile pyrethroid-type insecticidal component and (b) a sensitivity lowering coping agent. In particular, it is extremely useful because it shows a practical control effect against mosquitoes such as house mosquitoes such as Culex pipiens f. In addition, such effects can be applied to a variety of flying pests such as house flies, sturgeon flies, pufferfishes, aphids, nukakas, bees, leafhoppers, and insect pests such as ants, sand bug and larchworms Although it is recognized, it is particularly characteristic of mosquitoes.
　次に、本発明の害虫防除用エアゾール剤が、ピレスロイド系殺虫成分に対する感受性が低下した害虫に対して優れた防除効果を示すことを、実施例に基づいて説明する。 Next, it demonstrates based on an Example that the aerosol agent for pest control of this invention shows the outstanding control effect with respect to the pest in which the sensitivity with respect to a pyrethroid insecticidal component fell.
＜実施例１＞
　２００ｍＬ耐圧容器に、（ａ）常温揮散性ピレスロイド系殺虫成分としてのトランスフルトリンを０．２２ｇ（０．１２質量％）、（ｂ）感受性低下対処助剤としての１，３－ブチレングリコール（沸点：２０３℃）を８．０ｇ（４．５質量％）、（ｃ）エタノールを９６ｇ（約１２０ｍＬ，５４質量％）含有する混合物を入れ、（ｄ）水を加えて全量を２００ｍＬ（１７８ｇ）とした。該容器にバルブ部分を取付け、該バルブ部分を通じて窒素ガス約２ｇを加圧充填し、倒立噴射可能な噴射ボタンを装填して、実施例１の害虫防除用エアゾール剤とした。このエアゾール剤の内容物をバルブ部分から噴射したときの噴霧粒子の平均粒子径は９４μｍであった。 Example 1
(A) 0.22 g (0.12 mass%) of transfluthrin as a pyrethroid insecticidal component at normal temperature in a 200 mL pressure-resistant container, (b) 1,3-butylene glycol (boiling point as coping agent for lowering sensitivity) A mixture containing 8.0 g (4.5% by weight) of 203 ° C. and (c) 96 g (about 120 mL, 54% by weight) of ethanol is added, and (d) water is added to bring the total amount to 200 ml (178 g). did. A valve part was attached to the container, and about 2 g of nitrogen gas was pressure-filled through the valve part, and an inverted jettable injection button was loaded to obtain the pest control aerosol agent of Example 1. The average particle size of the spray particles was 94 μm when the contents of the aerosol were sprayed from the valve portion.
　実施例１の害虫防除用エアゾール剤を、ベランダの出入り口に隣接した木製床面２ｍ×３ｍに対し、トランスフルトリンとして約１９ｍｇ（約３．２ｍｇ／ｍ２）が付着するように、約６秒間倒立噴射した。このとき、エアゾール剤のバルブ部から噴射される噴霧粒子の平均粒子径は、上記のとおり９４μｍ程度で比較的粗いことから、噴霧粒子が処理対象物から大きく外れて飛散することがなく、その結果、噴霧粒子を吸入する虞は殆どなく、安全に噴霧処理を行うことができた。また、噴霧粒子は速乾性であり、処理床面で足が滑る心配もなかった。噴霧処理後、床面へのトランスフルトリンの付着量を分析し、噴霧粒子の付着効率を調べたところ、８３％で非常に高いことが認められた。その後は、処理床面上方にトランスフルトリンと感受性低下対処助剤とによるバリア空間が効率的に形成され、ベランダでの洗濯物干し中にヒトスジシマカ等の害虫に悩まされることがなく、加えてベランダの出入り口から飛翔害虫が室内に侵入するのを８時間にわたって阻止できた。さらに、ピレスロイド系殺虫成分に対する感受性が低下したネッタイイエカの生息が付近に観察されているタイ国において同様な試験を実施したが、結果は同様で優れた防除効果が実証された。 The pest control aerosol agent of Example 1 is applied for about 6 seconds so that about 19 mg (about 3.2 mg / m 2 ) of transfluthrin adheres to a wooden floor 2 m × 3 m adjacent to the entrance of the veranda. Inverted injection. At this time, since the average particle diameter of the spray particles sprayed from the valve portion of the aerosol agent is relatively coarse at about 94 μm as described above, the spray particles do not largely separate from the object to be treated and scatter, and as a result There was little risk of inhaling spray particles, and the spray processing could be performed safely. In addition, the spray particles were quick-drying, and there was no concern that the foot would slip on the treated floor. After the spray treatment, the amount of transfluthrin attached to the floor was analyzed, and the adhesion efficiency of the spray particles was examined. As a result, it was found that it was very high at 83%. After that, a barrier space of transfluthrin and a sensitivity lowering coping agent is efficiently formed above the treatment floor, and it is not bothered by pests such as Aedes albopictus during laundry drying on the veranda. It was possible to prevent the flight pest from entering the room from the entrance for 8 hours. Furthermore, similar tests were conducted in Thailand, where the presence of the netless house mosquitoes with reduced susceptibility to pyrethroid insecticidal components was observed in the vicinity, but the results were similar and demonstrated superior control effects.
＜実施例２～９、比較例１～８＞
　実施例１に準じて表１に示す実施例２～９の各種エアゾール剤を調製し、下記に示す付着性試及び防除効力試験を行った。また、比較のため、表１に示す比較例１～８の各種エアゾール剤についても、実施例と同様の試験を行った。なお、表１の中にカッコ書きで示してある（ａ）常温揮散性ピレスロイド系殺虫成分の含有量（質量％）、及び（ｂ）感受性低下対処助剤の含有量（質量％）は、それらの比重を１．０と見なして算出したものである。 Examples 2 to 9 and Comparative Examples 1 to 8
Various aerosols of Examples 2 to 9 shown in Table 1 were prepared according to Example 1, and adhesion test and control efficacy test shown below were conducted. Further, for comparison, the same tests as in the examples were conducted on the various aerosol agents of Comparative Examples 1 to 8 shown in Table 1. In addition, the content (mass%) of the (a) normal temperature volatile pyrethroid insecticidal component and the content (mass%) of the sensitivity lowering coping agent (b) shown in parentheses in Table 1 are those The specific gravity of was calculated as 1.0.
（１）処理対象面へのエアゾール原液の付着性試験
　０．５８３ｍ２のガラス板（２４ｃｍ×２７ｃｍのガラス板９枚）を床面に置き、上方５０ｃｍの距離から供試エアゾール剤を１秒間倒立噴射塗布した（実施例２については、参考として正立噴射塗布も実施）。ガラス板１枚分に付着したピレスロイド系殺虫成分量を分析後、全体面積あたりに換算し、噴射されたピレスロイド系殺虫成分量に対する付着率（％）を算出した。結果を表２に示す。 (1) Adhesion test of aerosol undiluted solution to the surface to be treated A 0.583 m 2 glass plate (9 glass plates of 24 cm × 27 cm) is placed on the floor surface and the sample aerosol agent is inverted for 1 second from a distance of 50 cm above Spray application was carried out (for example 2, erect injection application is also carried out as a reference). After analyzing the amount of pyrethroid insecticidal component adhering to one glass plate, it was converted per total area to calculate the adhesion rate (%) with respect to the amount of pyrethroid insecticidal component sprayed. The results are shown in Table 2.
（２）蚊に対する防除効力試験
　防除効力試験は半開放条件とした６畳居室にて実施した。具体的には、入り口の扉に２０メッシュのネットを貼り付けて開放し、換気扇を作動させた（換気条件：約７．３回／ｈｒ）。上記（１）付着性試験に準じ、別室で各供試エアゾール剤を噴射塗布した０．５８３ｍ２のガラス板を所定時間保存後、試験居室の床面中央に設置した。そして、直ちに供試昆虫（ピレスロイド系殺虫成分に対して感受性を有する、又は感受性が低下したアカイエカ雌成虫）約１００匹を放ち、試験者が処理ガラス板の周囲を歩きながら、経時的な両腕への降着数を数え、下記式により忌避率を求めた。結果を表２に示す。
　忌避率（％）＝［無処理区の飛来虫数－処理区の飛来虫数］／［無処理区の飛来虫数］×１００ (2) Mosquito control test on mosquitoes The test on the control of the mosquito was carried out in six semi-opened rooms under semi-open conditions. Specifically, a 20-mesh net was attached to the entrance door and opened, and the ventilation fan was operated (ventilation condition: about 7.3 times / hr). In accordance with the above (1) adhesion test, a 0.583 m 2 glass plate sprayed and applied with each test aerosol agent in another room was stored for a predetermined time, and then placed in the center of the floor of the test room. Then, immediately release about 100 test insects (M. cereus female adults sensitive to pyrethroid insecticidal components or reduced in sensitivity), and while the tester walks around the treated glass plate, both arms over time The number of landings on the ground was counted, and the repelling rate was determined by the following equation. The results are shown in Table 2.
Repellency rate (%) = [number of flying insects in the untreated area-number of flying insects in the treated area] / [number of flying insects in the untreated area] × 100
Figure JPOXMLDOC01-appb-T000001
 ＊比較例７については、エアゾール原液１００ｍＬに噴射剤１００ｍＬを加えたものとした。従って、噴射剤の欄の（　）内の数字は、エアゾール剤全体量に対する噴射剤比率（容量％）を示す。
Figure JPOXMLDOC01-appb-T000001
 In Comparative Example 7, 100 mL of the aerosol stock solution was added with 100 mL of the propellant. Therefore, the numbers in parentheses in the column of propellants indicate the ratio of propellant (volume%) to the total amount of aerosol.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　試験の結果、圧縮ガスとともに、（ａ）常温揮散性ピレスロイド系殺虫成分を０．０１～３．０質量％、（ｂ）常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤として、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルを１．０～１５質量％、（ｃ）炭素数が１～３の低級アルコールを３０～７０質量％、並びに（ｄ）水を残部質量％含有するエアゾール原液を倒立噴射可能な噴射ボタンを備えた耐圧容器に充填してなる本発明の害虫防除用エアゾール剤は、倒立噴射されたとき、エアゾール原液の６０質量％以上が処理対象物の表面に付着し、しかもその後、（ａ）成分が（ｂ）成分とともに処理対象物の表面の上方の空間に徐々に揮散し、ピレスロイド系殺虫成分に対して感受性のアカイエカは勿論、感受性が低下した系統のアカイエカに対しても、３時間以上、１２時間にわたって優れた忌避効果が認められた。なお、実施例２の参考試験で示されるように、正立噴射によれば（ａ）成分と（ｂ）成分の付着率の低下が避けられないので、倒立噴射可能なボタンの装填は必要と考えられた。なお、ピレスロイド系殺虫成分としては、実施例２、実施例８、実施例９、及び比較例８を参照して明らかなように、トランスフルトリン、メトフルトリン、及びプロフルトリンが本発明の目的に合致し、ｄｌ，ｄ－Ｔ８０－アレスリンは不適であった。なかでもトランスフルトリンの有用性が高く、ピレスロイド系殺虫成分に対して感受性が低下した系統のアカイエカに対しても、ピレスロイド感受性系統を対象とした場合と比べて防除効力の低下度合が小さく、これら蚊類を防除する上で極めて有効であることが確認された。また、比較例５、比較例６、及び比較例７が示すように、エタノールの配合量が７０質量％を超えて過大な場合、溶剤として灯油を用いた場合、及び噴射剤として圧縮ガスではなくＤＭＥを主体に用いた場合は、主に平均粒子径が小さくなったことに起因して処理対象物の表面への付着率が劣り、本発明の趣旨に適合しなかった。 As a result of the test, together with compressed gas, (a) 0.01 to 3.0% by mass of pyrethroid insecticidal component at normal temperature, (b) as a sensitivity reducing agent for pyrethroid insecticidal component at normal temperature, boiling point is 200 1.0 to 15% by mass of glycol having 3 to 6 carbon atoms having a temperature of 350 to 350 ° C. and / or higher fatty acid ester having a boiling point of 200 to 350 ° C., and (c) 30 lower alcohols having 1 to 3 carbon atoms The pest control aerosol agent of the present invention, which is prepared by filling an aerosol undiluted solution containing 70% by mass and (d) water with the balance by mass into a pressure-resistant container equipped with a jet button capable of inverted injection, 60% by mass or more of the aerosol stock solution adheres to the surface of the object to be treated, and then the component (a) and the component (b) gradually volatilize in the space above the surface of the object to be treated; Culex sensitive to insecticidal component, of course, even for Culex strains with reduced susceptibility, 3 hours or more, were observed excellent repellent effect for 12 hours. In addition, as shown in the reference test of Example 2, since the fall of the adhesion rate of (a) component and (b) component can not be avoided by erecting injection, loading of the button which can be inverted and injected is necessary. it was thought. As the pyrethroid insecticidal component, transfluthrin, metfluthrin, and profluthrin met the object of the present invention, as is apparent with reference to Example 2, Example 8, Example 9, and Comparative Example 8. , Dl, d-T80-allethrin were unsuitable. Above all, the usefulness of transfluthrin is high, and the control efficacy is less reduced in the control against the pyrethroid-sensitive lines, even in the house mosquito which is less sensitive to the pyrethroid-type insecticidal component than in the case of the pyrethroid-sensitive lines. It was confirmed to be extremely effective in controlling mosquitoes. Also, as Comparative Example 5, Comparative Example 6, and Comparative Example 7 show, when the blending amount of ethanol exceeds 70% by mass and is excessive, kerosene is used as a solvent, and not compressed gas as a propellant. When DME was mainly used, the adhesion rate to the surface of the object to be treated was inferior mainly due to the reduction of the average particle size, and it did not conform to the purpose of the present invention.
　さらに、（ｂ）感受性低下対処助剤として配合される、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルの効果も明らかとなった。即ち、実施例２、実施例４、実施例７、比較例３、及び比較例４の対比から、沸点が２００～３５０℃の範囲にある１，３－ブチレングリコール、１，４－ブチレングリコール、及び１，６－ヘキサンジオールは本発明の（ｂ）感受性低下対処助剤に該当し、一方、特許文献１及び特許文献２において揮散調整剤として挙げられたプロピレングリコール（比較例３、沸点：１８８℃）、及びエチレングリコール（比較例４、沸点：１９７℃）は忌避効果の持続性には寄与するものの、（ｂ）感受性低下対処助剤としての作用は十分と言えなかった。なお、沸点が２００～３５０℃の範囲にあるグリコールであっても、比較例２のように１５質量％を超えて配合された場合、感受性低下対処助剤としての作用が頭打ちとなるばかりか濃度に相応するメリットは得られなかった。このように、従来の揮散調整剤（広義の効力増強剤）が必ずしも「感受性低下対処助剤」に該当する訳ではなく、本発明者らが試行錯誤の上、目的に合致した試験を実際に行なったことにより、ある種の高級脂肪酸エステルについても今回初めて有用性が認められ、本発明で意図する「感受性低下対処助剤」となり得ることが判明した。 Furthermore, the effect of (b) glycols having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or higher fatty acid esters having a boiling point of 200 to 350 ° C. became. That is, from the comparison of Example 2, Example 4, Example 7, Comparative Example 3 and Comparative Example 4, 1,3-butylene glycol, 1,4-butylene glycol having a boiling point in the range of 200 to 350 ° C. And 1,6-hexanediol correspond to (b) sensitivity lowering coping agents of the present invention, while propylene glycols listed as volatilization regulators in Patent Document 1 and Patent Document 2 (Comparative Example 3, boiling point: 188 C) and ethylene glycol (Comparative Example 4, boiling point: 197 ° C.) contribute to the persistence of the repelling effect, but the effect as a coping agent for reducing sensitivity (b) can not be said to be sufficient. In addition, even if it is a glycol which has a boiling point in the range of 200-350 degreeC, when it mix | blends exceeding 15 mass% like Comparative Example 2, not only the effect | action as a sensitivity fall coping aid will reach a ceiling but concentration There was no corresponding merit. Thus, the conventional volatilization regulator (efficacy enhancer in a broad sense) does not necessarily correspond to the "sensitivity reduction coping agent", and the present inventors actually conducted tests that met the purpose through trial and error. As a result, it has been found for the first time that certain higher fatty acid esters are also useful and can be the "sensitivity lowering coping agent" intended in the present invention.
　以上のとおり、本発明の害虫防除用エアゾール剤、及び害虫防除方法によれば、ピレスロイド系殺虫成分に対して感受性が高い害虫はもちろん、感受性が低下した害虫、特に蚊類に対しても有効なので極めて実用的である。 As described above, according to the pest control aerosol agent and pest control method of the present invention, it is effective not only against pests having high sensitivity to pyrethroid insecticidal components but also against pests having reduced sensitivity, particularly mosquitoes. It is very practical.
　本発明の害虫防除用エアゾール剤、及び害虫防除方法は、屋外用途において好適に利用できるものであるが、屋内においても当然に利用可能であり、その他にも広範な害虫防除を目的として利用可能である。 The aerosol controlling agent for controlling insect pests and the method for controlling insect pests according to the present invention can be suitably used for outdoor use, but can naturally also be used indoors, and can also be used for the purpose of controlling a wide range of insect pests is there.

Claims (10)

  1. 　倒立噴射可能な噴射ボタンを備えた耐圧容器にエアゾール原液と圧縮ガスとを充填してなる害虫防除用エアゾール剤であって、
    　前記エアゾール原液は、
    　（ａ）３０℃における蒸気圧が２×１０－４～１×１０－２ｍｍＨｇである常温揮散性ピレスロイド系殺虫成分を０．０１～３．０質量％、
    　（ｂ）前記常温揮散性ピレスロイド系殺虫成分の感受性低下対処助剤として、沸点が２００～３５０℃である炭素数が３～６のグリコール及び／又は沸点が２００～３５０℃である高級脂肪酸エステルを１．０～１５質量％、
    　（ｃ）炭素数が１～３の低級アルコールを３０～７０質量％、並びに
    　（ｄ）水を残部質量％
    含有する害虫防除用エアゾール剤。     It is an aerosol agent for controlling insect pests, which comprises an aerosol undiluted solution and a compressed gas filled in a pressure-resistant container provided with an injection button capable of inverted injection,
    The aerosol stock solution is
    (A) 0.01 to 3.0% by mass of a room temperature volatile pyrethroid insecticidal component having a vapor pressure of 2 × 10 −4 to 1 × 10 −2 mmHg at 30 ° C.
    (B) A glycol having 3 to 6 carbon atoms having a boiling point of 200 to 350 ° C. and / or a higher fatty acid ester having a boiling point of 200 to 350 ° C. as a coping agent for reducing the sensitivity of the above-mentioned normal temperature volatile pyrethroid insecticidal component 1.0 to 15% by mass,
    (C) 30 to 70% by mass of a lower alcohol having 1 to 3 carbon atoms, and (d) the remaining mass% of water
    Aerosol for pest control contained.
  2. 　前記噴射ボタンから、前記エアゾール原液を前記圧縮ガスとともに屋外の処理対象物に前記（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射したとき、前記エアゾール原液の６０質量％以上が前記処理対象物の表面に付着し、
    　さらに、前記表面から、前記エアゾール原液に含まれる前記（ａ）常温揮散性ピレスロイド系殺虫成分が前記（ｂ）感受性低下対処助剤とともに３時間以上にわたり揮散するように構成されている請求項１に記載の害虫防除用エアゾール剤。     When the aerosol undiluted solution is sprayed onto the object to be treated outdoors with the compressed gas from the injection button so that the processing amount of the (a) normal temperature volatile pyrethroid insecticidal component is 0.5 to 20 mg / m 2 60% by mass or more of the aerosol stock solution adheres to the surface of the object to be treated,
    Furthermore, the (a) normal temperature volatile pyrethroid insecticidal component contained in the aerosol stock solution is volatilized from the surface along with the (b) sensitivity lowering coping agent for 3 hours or more. Aerosol agent for pest control as described.
  3. 　ピレスロイド系殺虫成分に対する感受性が低下した害虫を防除対象とする請求項１又は２に記載の害虫防除用エアゾール剤。 The pest control aerosol agent according to claim 1 or 2, which controls a pest whose sensitivity to a pyrethroid insecticidal component is reduced.
  4. 　前記害虫は、蚊類である請求項３に記載の害虫防除用エアゾール剤。 The pest agent according to claim 3, wherein the pest is a mosquito.
  5. 　前記常温揮散性ピレスロイド系殺虫成分は、トランスフルトリン、メトフルトリン、及びプロフルトリンからなる群から選択される少なくとも一種である請求項１～４の何れか一項に記載の害虫防除用エアゾール剤。 The pest control aerosol agent according to any one of claims 1 to 4, wherein the cold volatile pyrethroid insecticidal component is at least one member selected from the group consisting of transfluthrin, metfluthrin, and profluthrin.
  6. 　前記感受性低下対処助剤は、１，３－ブチレングリコール、１，４－ブチレングリコール、ミリスチン酸イソプロピル、及びラウリン酸ヘキシルからなる群から選択される少なくとも一種である請求項１～５の何れか一項に記載の害虫防除用エアゾール剤。 The agent for reducing sensitivity to sensitivity is at least one selected from the group consisting of 1,3-butylene glycol, 1,4-butylene glycol, isopropyl myristate, and hexyl laurate. The aerosol agent for pest control as described in a term.
  7. 　前記噴射ボタンから倒立噴射された前記エアゾール原液の平均粒子径は、７０～１６０μｍである請求項１～６の何れか一項に記載の害虫防除用エアゾール剤。 The pest control aerosol agent according to any one of claims 1 to 6, wherein the average particle diameter of the aerosol stock solution inverted and injected from the injection button is 70 to 160 μm.
  8. 　前記処理対象物は、屋外のテラスの床面、屋外のベランダの床面、屋外に設置されたビニルシートの表面、又は屋外地面である請求項２～７の何れか一項に記載の害虫防除用エアゾール剤。 The pest control according to any one of claims 2 to 7, wherein the object to be treated is a floor surface of an outdoor terrace, a floor surface of an outdoor veranda, a surface of a vinyl sheet installed outdoors, or an outdoor ground. Aerosols.
  9. 　ピレスロイド系殺虫成分に対する感受性が低下した害虫を防除する害虫防除方法であって、
    　請求項１～８の何れか一項に記載の害虫防除用エアゾール剤を、屋外の処理対象物に前記（ａ）常温揮散性ピレスロイド系殺虫成分の処理量が０．５～２０ｍｇ／ｍ２となるように倒立噴射する噴射工程と、
    　前記処理対象物の表面に付着した前記エアゾール原液に含まれる前記（ａ）常温揮散性ピレスロイド系殺虫成分を前記（ｂ）感受性低下対処助剤とともに、前記表面から３時間以上にわたり揮散させる揮散工程と、
    を包含する害虫防除方法。     A pest control method for controlling a pest whose sensitivity to a pyrethroid insecticidal component is reduced,
    9. The pest control aerosol agent according to any one of claims 1 to 8, wherein the treated amount of the (a) normal temperature volatile pyrethroid insecticidal component is 0.5 to 20 mg / m < 2 > on an object to be treated outdoors. And an injection process for upside down injection,
    A volatilization step of volatilizing the (a) normal temperature volatilizable pyrethroid insecticidal component contained in the aerosol stock solution attached to the surface of the object to be treated together with the (b) sensitivity lowering coping agent for at least 3 hours from the surface; ,
    A pest control method including:
  10. 　前記害虫は、蚊類である請求項９に記載の害虫防除方法。 The pest control method according to claim 9, wherein the pest is a mosquito.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008063242A (en) * 2006-09-05 2008-03-21 Fumakilla Ltd Sanitary insecticide
JP2010161957A (en) * 2009-01-14 2010-07-29 Dainippon Jochugiku Co Ltd Method for obstructing invasion of insect pest
JP2011063576A (en) * 2009-08-20 2011-03-31 Dainippon Jochugiku Co Ltd Method for exterminating insect pest and mite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008063242A (en) * 2006-09-05 2008-03-21 Fumakilla Ltd Sanitary insecticide
JP2010161957A (en) * 2009-01-14 2010-07-29 Dainippon Jochugiku Co Ltd Method for obstructing invasion of insect pest
JP2011063576A (en) * 2009-08-20 2011-03-31 Dainippon Jochugiku Co Ltd Method for exterminating insect pest and mite

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