JPH0439442B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for simultaneously controlling pests. (Prior Art and Problems to be Solved by the Invention) Conventionally, as a method for controlling adult insects, pupae, and larvae of pests on the walls of underground water tanks and septic tanks, in water, and at the water's edge, high-intensity spraying using a Motsupara spray method has been used. They were spraying high concentrations of chemicals. Alternatively, residual spraying has been used to treat the problem, but not only is it not sufficiently effective, but it also kills the activated sludge bacteria and causes problems such as fish toxicity in the wastewater and the use of large amounts of chemicals. This method is not used much at present because it causes various harms and takes time to control the pest, and there has been a strong desire for an alternative method. (Means for Solving the Problems) The present invention was completed as a result of intensive research aimed at eliminating the above-mentioned conventional drawbacks. That is, the present invention simultaneously controls adult insects, pupae, ^and larvae of pests that live on the walls, underwater, and at the water's edge in underground water tanks and septic tanks. It relates to a method for simultaneously controlling pests, which is characterized by allowing the product to stand for at least 30 minutes after transpiration to achieve a concentrated concentration. According to the pest control method of the present invention, all of the above-mentioned drawbacks of conventional chemical spraying and residual spraying have been eliminated. In other words, in terms of efficacy, it can control all adults, pupae, and larvae, and in addition to controlling adult insects that are normally considered to be in the smoke space, it also controls larvae of midges, midges, and other flies that live in water. New knowledge has been obtained that allows for effective control through treatment. In terms of the environment, this method uses a very small amount of chemicals, so activated sludge bacteria are not killed, and the problem of fish toxicity in wastewater is solved at once. In terms of work, conventional spray nozzles for spraying chemicals are inserted through manholes, making it difficult to spray chemicals to every corner of the septic tank.Furthermore, the structure of underground water tanks is usually very complex, making it difficult to spray chemicals sufficiently. However, with this method, it is sufficient to smoke underground water tanks and septic tanks by simply smoking near the manholes, even in underground water tanks with complex structures. It has many features, such as the ability to spread the chemical and provide sufficient control effects against pests that live in limited spaces above the water surface, in the water, and near the water's edge with a short treatment time. As the fumigation agent in the present invention, any of the various agents conventionally used for the purpose of exterminating pests can be used. The following are examples of representative drugs. 1 Insecticide Γ3-allyl-2-methylcyclopent-2-en-4-one-1-yl dl-cis/trans-chrysanthemate (generic name: allethrin; trade name: pinamine: manufactured by Sumitomo Chemical Co., Ltd., hereinafter Γ3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis/trans-chrysanthemate (trade name: Pinamine Fuorte: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Pinamine Fuorte) Γd -3-allyl-2-methylcyclopent-2
-en-4-one-1-yl d-trans-
Chrysanthemate (trade name Exlin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Exlin) Γ3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-trans-chrysanthemate (generic name Bioallethrin (hereinafter referred to as bioallethrin) ΓN-(3,4,5,6-tetrabidrophthalimido)-methyl dl-cis/trans-chrysanthemate (generic name: phthalthrin; trade name: neopinamine or tetramethrin: Sumitomo Chemical Co., Ltd.) manufactured by the company, hereinafter referred to as neopinamine) Γ5-benzyl-3-furylmethyl d-cis/
Trans-chrysanthemate (generic name: Resmethrin; trade name: Chrylonfuorte; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Chrylonfuorte) Γ2-Methyl-5-(2-propargyl)-3-furylmethyl-chrysanthe Mart (generic name: flamethrin, hereinafter referred to as flamethrin) Γ3-phenoxybenzyl 2,2-dimethyl-
3-(2',2'-dichloro)vinylcyclopropanecarboxylate (generic name: Permethrin; trade name: Exmin; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Exmin) Γ3-Phenoxybenzyl d-cis/trans-chrysante Mart (generic name Phenothrin; trade name Sumitrin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Sumitrin) Γα-cyano-3'-phenoxybenzyl a-isopropyl-4-chlorophenylacetate (common name Fuenvalerate: trade name Sumicidin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as Sumicidin) ΓO,O-dimethyl O-(2,2-dichloro)
Vinyl phosphate (hereinafter referred to as DDVP) ΓO,O-dimethyl O-(3-methyl-4-nitrophenyl)thionophosphate (hereinafter referred to as Sumithion) ΓO,O-dimethyl O-2-isopropyl-4
-Methyl-pyrimidyl-(6)-thiophosphate (hereinafter referred to as diazinon) ΓO,O-dimethyl S-(1,2-dicarboethoxyethyl)-dithiophosphate (hereinafter referred to as marathon) ΓO-isopropoxy Phenyl methyl carbamate (hereinafter referred to as bigon) In addition, in the present invention, as a transpiration medium used in combination with the above fumigation agent and various additives added as necessary, phenyl methyl carbamate (hereinafter referred to as bigon) is a transpiration medium that is thermally decomposed to mainly generate nitrogen gas, carbon dioxide gas, etc. Any of the usual organic blowing agents can be used, but those having a blowing temperature of 300° C. or lower are preferred. Typical organic blowing agents include azo compounds, nitroso compounds, hydrazide compounds, semicarbazide compounds, etc., and these can be used singly or in combination of two or more.
Specific compounds are shown in Table 1 below along with their foaming temperatures and gas generation amounts (volume in standard conditions, cc/g).

【table】

[Table] In the present invention, the mixing ratio of the above-mentioned transpiration medium to the fumigation agent can be selected as appropriate depending on the desired efficacy of the resulting composition, but usually the transpiration medium is about 1/2 times the weight of the fumigation agent. It is better to set it to the above.
As the mixing ratio of the evaporation medium increases, the effective volatilization rate of the fumigation agent gradually improves, but if the amount is too large, the effect does not improve. Usually, the amount of the transpiration medium is about 1/2 to 30 times the weight of the fumigation agent, preferably about 1 to 20 times the weight. In the present invention, the airborne concentration of the active ingredient in the space that requires treatment with the fumigation agent is 1 mg to 200 mg/m ³ , preferably 5 mg to 50 mg/m 3 .
It is best to use it in the range of mg/ ^m3 . If the concentration is lower than this, it will not be possible to simultaneously control adults, pupae, larvae, and larvae such as midges and fruit flies living in the water in the treatment space, and if the concentration is higher than the above, activated sludge bacteria will be killed. This is not desirable as it may cause problems of fish toxicity in the waste water. In the present invention, it is necessary to leave the smoke transpiration agent for at least 30 minutes or more, preferably 60 minutes or more after evaporation, and even if it is shorter than this time, the effects of the present invention can still be achieved. Can not do it. Further, the mixed form of the fumigation agent and the evaporation medium is not particularly limited, and may be in the form of a mixed powder, but in consideration of workability and ease of production and use of the resulting composition, suitable granule or tablet forms may be used. , lumps, pellets, rods, plates, pastes, etc., or mixed and sealed in heat-meltable resin bags etc. Various fillers, excipients,
Binders, solvents, etc. can be used. Examples are given below to explain the present invention in detail. Production Examples 1 to 17 Using the double cylindrical container shown in Figure 1, the insecticides and gas generating agents listed in Table 2 are mixed and stored in the inner container 2, and the outer container 1 is Add 100g of calcium oxide (particle size 1-5 mesh),
A fumigation agent for implementing the present invention was obtained. For use, 40 g of water is injected through the opening 5 leading into the outer container 1 of the obtained fumigation agent. Example Using the fume transpiration agent of Production Example No. 2 shown in Table 2, an underground water tank {flat area
27.86m ³ , depth 3.5m, volume 97.5m ³ (space volume 86.4
m ³ , water volume 11.1 m ³ )}, open the manhole cover and
Prepare a water container filled with 40 c.c. of water, and attach the hanging means (length 50 cm) attached to the periphery of the opening of the container in advance to the manhole so that it can be suspended into the underground water tank through the manhole opening. After that, the fume transpiration agent is piled up in the water container, and it is put into the underground water tank using the hanging means, and the manhole cover is closed. The above-mentioned fumigation agent generates heat in the hydration exothermic agent, and the transpiration medium is thermally decomposed by this heat, and the insecticide is fumigated by the action of this thermal decomposition gas. The desired effects shown in Tables 3 and 4 could be achieved.

【table】

[Table] Target insects, Chicaea mosquitoes, and Chimpanidae (1st to 4th instar larvae, pupae, adults) Method for determining control effectiveness: Insect 250 kg at designated locations in the underground water tank before and after treatment.
Water was collected using a small ml bottle, placed in a plastic bag, and brought back to the laboratory, where the number of larvae and pupae living there was counted. In addition, the number of adult insects resting on some walls of the underground tank (one location ≒ 2 m ³ , 7 locations) was counted visually before and after the treatment.

【table】

[Table] Results: As shown in Table 3, significant lethal activity against adult mosquitoes was observed after treatment. As shown in Table 4, 100% lethal activity against larvae and pupae was observed one day after treatment. In addition, the effect on fruit flies was determined in the same way, and results showed that 1 day after co-treatment of adults, pupae, and larvae.
100% lethal activity was observed.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the fumigation agent and its container used in the present invention, Figure 2A is a cross-sectional view of an underground water tank in which the present invention is implemented, and Figure 2B is an underground water tank in which the present invention is implemented. FIG. In the figure, 1 is an outer container, 2 is an inner container, 3 is a transpirable insecticidal ingredient, 4 is a pyrogenic substance,
5 is the opening, 6 is the water container, 7 is the locking part, 8 is the hanging means, a to g is the wall surface for the adult population survey, 1 to 1 are the sampling points for the larva and pupa population survey, and A is the drug application point. , B is the wall surface, and C is the water.

Claims (1)

[Claims] 1. To simultaneously control adult insects, pupae, and larvae of pests that live on the walls, water, and waterfronts in underground water tanks and septic tanks, apply fume transpiration agent to an active ingredient concentration of 1 to 200 mg/m ³ in the above-mentioned limited space. A method for simultaneously controlling pests, which is characterized by leaving it for at least 30 minutes after transpiration.