JPH05320001A - Method for exterminating mosquito - Google Patents

Abstract

(57) [Summary] [Structure] A composition containing an insect growth regulator as an active ingredient is applied to adult mosquito females after blood feeding, and the applied insect growth regulator is delivered to the mosquito spawning site. A method for exterminating mosquitoes, which is characterized by [Effect] The method for controlling mosquitoes according to the present invention does not directly spray the drug to the place where the mosquito occurs, even if the source of the mosquito such as a pond, a swamp, or a water reservoir is unknown. It is possible to effectively control mosquito larvae already growing in the water source.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for controlling mosquitoes using an insect growth regulator.

[0002]

2. Description of the Related Art Conventionally, a method for exterminating mosquitoes by spraying an insect growth regulator on a pond, a swamp, a water pool or the like, which is the source of mosquitoes, has been known.

[0003]

However, in many cases, the source of the mosquito is actually unknown, and in that case, the mosquito that occurred must be exterminating each time with an insecticide or the like. ..

[0004]

The method for controlling mosquitoes according to the present invention comprises applying a composition containing an insect growth regulator as an active ingredient to adult mosquito females after blood feeding, and applying the insects to the adult mosquito females. A growth control agent is transported to the spawning site of mosquitoes, and when a mosquito female adult to which an insect growth control agent is applied reaches the spawning site and lays eggs, a pond, a swamp, a water pool, etc. Since the insect growth control agent will be carried to the water source, it can be effective even if the source of mosquito is unknown.

Specific examples of the insect growth regulator used in the present invention include juvenile hormone active compounds and chitin synthesis inhibitors. Examples of the juvenile hormone active compound include 4-phenoxyphenyl 2-
(2-Pyridyloxy) propyl ether [pyriproxyfen], ethyl 2- (4-phenoxyphenoxy) ethyl carbamate [phenoxycarb], isopropyl 11-methoxy-3,7,11-trimethyl-2,4-dodecadieno Ate [mesoprene], 4-chloro-2- (2-chloro-2-methylpropyl) -5-
(6-Iodo-3-pyridylmethoxy) pyridazine-3
(2H) -one can be mentioned.

Examples of chitin synthesis inhibitors include 1
-(4-chlorophenyl) -3- (2,6-difluorobenzoyl) urea [diflubenzuron], 1- [3,
5-dichloro-4- (3-chloro-5-trifluoromethylpyridin-2-yloxy) phenyl] -3-
(2,6-difluorobenzoyl) urea [chlorfluazuron], 1- (3,5-dichloro-2,4-difluorophenyl) -3- (2,6-difluorobenzoyl) urea [teflubenzuron], 1- (4-Trifluoromethoxyphenyl) -3- (2-chlorobenzoyl) urea [triflumuron], 1- [4- (2-chloro-4-trifluoromethylphenoxy) -2-fluorophenyl] -3- (2 , 6-difluorobenzoyl)
Urea [Flufenoxuron], 1- [α- (4-chloro-α-cyclopropylbenzylideneaminooxy)-
p-tolyl] -3- (2,6-difluorobenzoyl)
Urea [Flucycloxuron], 1- [3,5-Dichloro-4- (1,1,2,2-tetrafluoroethoxy)
Phenyl] -3- (2,6-difluorobenzoyl) urea [hexaflumuron], 1- [2-fluoro-4-
(1,1,2,2-tetrafluoroethoxy) phenyl] -3- (2,6-difluorobenzoyl) urea,
Benzoylurea compounds such as 1- (2-fluoro-4-trifluoromethylphenyl) -3- (2,6-difluorobenzoyl) urea and 2-tert-butylimino-3-isopropyl-5-phenyl-3,4. 5,6
-Tetrahydro-2H-1,3,5-thiadiazine-4
-One [buprofezin].

In the present invention, specific examples of mosquitoes to be controlled include, for example, Culex spp., Culex spp., Culex spp., Aedes spp., Aedes mosquito, Aedes spp., Aedes spp., Anopheles mosquito, etc. ( Anopheles spp.) And the like.

The composition used in the present invention containing an insect growth regulator as an active ingredient is a conventional pesticide formulation containing 0.01 to 95% by weight of the aforementioned insect growth controlling compound in the composition. That is, it is an aqueous or oily aerosol, an oil, a powder, an emulsion, a suspension, a microencapsulated preparation, etc., and if necessary, a surfactant and other formulation auxiliary agents are added to the liquid carrier, solid carrier, etc. described later. It is generally carried by the above.

Specific examples of the liquid carrier include aliphatic hydrocarbons such as kerosene, aromatic hydrocarbons such as benzene, toluene, xylene and methylnaphthalene, halogenated hydrocarbons such as dichloroethane and trichloroethylene, ethylene glycol and 2-ethoxy. Alcohols such as ethanol, ketones such as acetone, methyl ethyl ketone, cyclohexanone and isophorone, ethers such as diethyl ether, dioxane and tetrahydrofuran, esters such as ethyl acetate, nitriles such as acetonitrile and isobutyronitrile, acids such as dimethylformamide and dimethylacetamide. Examples thereof include amides, vegetable oils such as soybean oil and cottonseed oil, and dimethyl sulfoxide. Specific examples of the solid carrier include:
Examples thereof include kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite, corn cob powder, walnut shell powder, urea, ammonium sulfate, and fine powders or particles of synthetic hydrous silicon oxide. Examples of surfactants include anionic surfactants such as alkyl sulfate ester salts, alkylaryl sulfonates, dialkylsulfosuccinates, polyoxyethylene alkylaryl ether phosphate ester salts, and naphthalene sulfonic acid formalin condensates, polyoxyethylene salts. Nonionic surfactants such as ethylene alkyl ether, polyoxyethylene polyoxypropylene block copolymer, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester can be used. As other formulation auxiliary agents, for example, lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, molasses, casein, gelatin, carboxymethyl cellulose, pine oil, agar and other fixing agents and dispersants, acidic isopropyl phosphate, Alkyl phosphates such as tricresyl phosphate,
Examples include vegetable oils, epoxidized oils, antioxidants such as BHT and BHA, fatty acid salts such as sodium oleate and calcium stearate, and stabilizers such as fatty acid esters such as methyl oleate and methyl stearate.

A so-called microencapsulated preparation can be used as a composition containing an insect growth regulator as an active ingredient, and its film substance is formalin urea resin, polystyrene, polyvinyl acetate, polyacrylonitrile, polyethylene, Polybutyl methacrylate, polyisobutylene, polybutadiene, polyarylene polyisocyanate, gelatin, casein, albumin, fibrinogen, hemoglobin, polyvinylpyrrolidone, carrageenan, sodium alginate, agar, gum arabic, tragacanth gum, locust bean gum, guar gum, carboxymethyl cellulose, Polyvinyl sulfonic acid, cellulose derivative, polyvinyl derivative, starch derivative, amino acid derivative, vinyl pyridine-acrylic acid copolymer, silicic acid, po It may be mentioned urea, polyurethane, polyamide, polyester, polycarbonate, sulfonate, polysulfone amide, and epoxy resins.

When the composition containing the above-mentioned insect growth control agent as an active ingredient is applied to adult mosquito females, it may be applied by a method such as spraying or coating directly on the insect body,
An indirect application method, for example, a method of treating the composition on a sheet-shaped substrate and contacting the treated surface with an adult mosquito female may be adopted. Examples of the sheet-shaped substrate in that case include, for example, paper such as filter paper, cardboard, pulp, polyethylene, polypropylene, resin plate such as vinyl chloride, ceramics, asbestos, glass fiber, carbon fiber, chemical fiber, natural fiber,
Nonwoven fabrics, porous polymer films, porous glass materials, base materials for mosquito mats (solidified fibrils of a mixture of cotton linter and pulp in a plate form), etc. A sheet-shaped base material supported by impregnation, coating, embedding or the like is used. The application rate when applying the composition to adult mosquito females varies depending on the conditions such as the type of active ingredient of the insect growth regulator, the treatment method, etc., but when directly applied to the worm body, the amount of the active ingredient is usually 0.1.
When treating a sheet-like base material, the amount of the active ingredient is generally about 0.1 g / m ² to 10 g / m ² in general.

[0012]

[Function] Adult female mosquitoes, to which a composition containing an insect growth regulator as an active ingredient is applied, reach the source of mosquitoes such as ponds, swamps, and ponds to lay eggs, but at that time they adhere to the body surface. Since the insect growth regulator is carried, the same effect as when the insect growth regulator is sprayed directly to the mosquito source can be inhibited and the emergence of mosquito can be prevented. It is known that insect growth regulators can generally control the growth of insects in a very small amount, and the amount of the insect growth regulator attached to the body surface of mosquitoes also exhibits its action sufficiently.

[0013]

EXAMPLES Next, it will be shown in more concrete test examples that the extermination method of the present invention is effective. Test Example 1 5% by weight of pyriproxyfen, 0.5% by weight of Solpol SM200 (an alkylphenol emulsifier manufactured by Toho Kagaku Co., Ltd.), 5% by weight of rapeseed oil, and the balance being water in a glass tube having an inner diameter of 4 cm and a length of 15 cm. The wall was treated with an amount of 20 ml / m ² . Then, 10 female adults of Aedes aegypti, 3 days after blood feeding, were released into the glass tube and left to stand for 30 minutes to be brought into contact with the inner wall of the glass tube. On the other hand, a 1 liter plastic cup was placed in a net chamber having a volume of about 40 liters, and 500 ml of water was put into the net and 20 final larvae of Aedes aegypti were released. Further, a filter paper was wrapped around the inner wall of the plastic cup so as to be suitable as a spawning site. In the net chamber, one adult female Aedes aegypti described above was released, and after 1 day, after confirming that eggs were laid on the filter paper in the plastic cup, the plastic cup was taken out, and after 7 days, the Aedes aegypti final released. The emergence of 20 old larvae was observed. The test was repeated 3 times. As a comparative control, the same test was performed using adult female Aedes aegypti without drug treatment, and the emergence of 20 Aedes aegypti final larvae was observed. The results are shown in Table 1.

[0014]

[Table 1]

Test Example 2 A composition containing 5% by weight of pyriproxyfen, 5% by weight of Solpol SM200 (an alkylphenol emulsifier manufactured by Toho Kagaku Co., Ltd.) and the balance of xylene was prepared. Volume about 30
Ten adult Aedes aegypti females 3 days after blood feeding were released into a chamber of m ³ and the composition obtained above was treated with water 10 times.
10 ml of the double-diluted solution was sprayed into the chamber with a ULV sprayer, and after 2 hours, adult female Aedes aegypti were collected. On the other hand, a 1 liter plastic cup was placed in a net chamber having a volume of about 40 liters, and 500 ml of water was put into the net and 20 final larvae of Aedes aegypti were released. Further, a filter paper was wrapped around the inner wall of the plastic cup so as to be suitable as a spawning site. In the net chamber, one adult female Aedes aegypti described above was released, and after 1 day, after confirming that eggs were laid on the filter paper in the plastic cup, the plastic cup was taken out, and after 7 days, the Aedes aegypti final released. Young larva
The emergence of 20 animals was observed. The test was repeated 3 times. As a comparative control, a similar test was conducted using adult female Aedes aegypti without drug treatment.
The head emergence was observed. The results are shown in Table 2.

[0016]

[Table 2]

[0017]

EFFECT OF THE INVENTION According to the mosquito control method of the present invention, even if the source of the mosquito such as a pond, a swamp, or a water reservoir is unknown, the drug is directly sprayed to the mosquito-occurring place. Without
It is possible to effectively control mosquito larvae already growing in the water source.

Claims (1)

[Claims] 1. A composition containing an insect growth control agent as an active ingredient, which is applied to adult mosquito females after blood feeding, and the adult mosquito females are allowed to carry the applied insect growth control agent to the mosquito spawning site. How to get rid of mosquitoes