JPH05294801A - Insect pest exterminator - Google Patents

Abstract

PURPOSE:To make it possible to almost simultaneously exterminate larvae and adults which live in water and space above water and thereby improve operation efficiency in application and make it possible to drastically and simply carry out extermination of insect pests. CONSTITUTION:The objective insect pest exterminator consists essentially of a underwater-diffusible or water surface-diffusible insecticidal ingredient such as fenthion or pyriproxyfen and a volatile insecticidal ingredient such as empenthrin or dichlorvos and carrier for floating these insecticidal ingredients on water surface, e.g. kaolin or tung oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pest control agent for controlling pests that live in water systems and air.

[0002]

2. Description of the Related Art Generally, many insects have completely different morphology between the larval stage and the adult stage even though they are of the same species through a transformational process called metamorphosis. Different types of pesticides such as insecticides are required.

Therefore, conventionally, in order to control larvae in the water area and flying adults, agents having different effects have been used in respective application methods.

[0004] For example, as a larva countermeasure for eradication of Drosophila melanogaster, emulsions or granules containing organic phosphorus insecticides, insect growth inhibitors and the like as active ingredients are sprayed on water systems such as septic tanks, while adult As a countermeasure, emulsions or aerosols containing an organic phosphorus insecticide or a pyrethroid insecticide as an active ingredient were sprayed on the wall surface of the purification groove.

[0005]

However, the simultaneous application of different chemicals to the larvae and adults of the pests by the optimum method requires a considerably complicated work. It's not easy. Also,
If the larvae or adults are exterminated at a time interval of, for example, 1 to 2 days, metamorphosis or spawning of the pests living under one of the environments occurs during that period, or a new individual from the outside Invasion is expected and radical extermination is difficult.

The present invention solves the above-mentioned problems and makes it possible to control pest control agents against larvae and adults that live in water and in the space above water almost at the same time, and improve work efficiency during application. The challenge is to improve and to control pests radically and easily.

[0007]

In order to solve the above-mentioned problems, in the present invention, an essential component is an insecticidal component capable of diffusing in water or water, a volatile insecticidal component and a carrier for floating these insecticidal components on the water surface. It was used as a pest control agent. The details will be described below.

As the insecticidal ingredient used in the present invention, an insecticidal ingredient that is water- or water-diffusible is either dissolved, emulsified or dispersed in water (hereinafter referred to as water-diffusible) or floated on the water surface and diffused in a thin film form. It means an insecticidal component having the property of spreading (hereinafter referred to as water surface spreadability), and may contain an auxiliary agent such as a surfactant or a water-soluble polymer in order to impart or promote the property.

Examples of such water-diffusible or water-spreading insecticidal components include fenitrothion, fenthion,
Examples thereof include diazinon, prothiophos, chlorpyrifos-methyl, temephos, marathon, bromophos, chrysulon, permethrin, phenothrin, cypermethrin, ciphenotri, pyriproxyfen, diflubenzuron, methoprene, hydroprene, teflubenzuron, and phenoxycarb.

The volatile insecticidal component used in the present invention has the property of evaporating from the solid or liquid into the air. For example, dichlorvos, electromic, DEET, enpentrin, phthalthrin, resmethrin, allethrin, flamethrin. Alternatively, these geometrical isomers and optical isomers may be mentioned.

Examples of surfactants include lauric acid alcohol sulfate, sorbitan trioleate, polyoxyethylene sorbitan trioleate, castor oil fatty acid, sulfated animal and vegetable oils and fats. The amount of such a surfactant used is 0.1 to 10.0% by weight in the preparation as a guide, and the amount may be appropriately increased or decreased depending on the properties such as diffusibility of the active ingredient to be used.

Further, at least one or more of the above-mentioned water-diffusible or water-spreading insecticidal components or volatile insecticidal components may be selected and used. The amount is not necessarily constant depending on the type and the type of pest to be exterminated, but may be, for example, about 0.01 to 50.0% by weight in the total amount in the preparation.

The carrier for floating the insecticidal component used in the present invention on the water surface can be used without particular limitation as long as it is a water-floating solid or liquid. For example, diatomaceous earth, talc, clay, acid clay, bentonite, Non-combustible / insoluble mineral powder such as kaolin and silica stone powder, organic powder such as lees powder, wood powder, tab powder and cellulose fiber,
Dried products of inorganic salts such as sodium sulfate, magnesium sulfate or sodium carbonate, coated with silicone oil, vegetable oils such as tung oil, rapeseed oil, cottonseed oil, refined kerosene, N-butanol, mineral oils such as cyclohexanone , Liquids such as silicone oil, liquid paraffin, and chlorinated paraffin. The amount of such a carrier compounded in the formulation is 1.0 to 99.
It may be 9% by weight.

To prepare a pest control agent from the above-mentioned raw materials, after mixing all at once, it is molded according to a dosage form such as granules, granules, pellets or the like, or only the carrier is made into the above desired dosage form. After molding, a commonly used preparation method such as impregnation with a required component such as an insecticidal component and holding it by a method such as spraying is adopted.

[0015]

The pest control agent of the present invention, when sprayed on a water system, floats on the water surface due to the buoyancy of the carrier.
Larvae and the like that live in water or on the surface of water are acted upon by insecticidal components that diffuse in water or on the surface of water, and volatile insecticidal components exert their effects on adults and the like that fly into the air above the water system.

[0016]

【Example】

[Examples 1 to 7] Prepared by mixing, as an active ingredient, an insecticidal component having water diffusibility or water surface spreadability, a volatile insecticidal component, a carrier and a surfactant at the compounding ratio (% by weight) shown in Table 1. Then, the water buoyancy and water surface spreadability of each of the obtained preparations were examined, and the results are shown in Table 1.

Water buoyancy test: 500 ml of standard hard water was placed in a 1000 ml beaker, and a formulation sample of 10 m was placed in the beaker.
g from the position of about 10 cm above the water surface to the center of the beaker 48
After dropping while passing through a standard mesh sieve, it was gently stirred for about 100 to 150 times per minute for 5 minutes using a glass rod, and left as it was for 5 minutes. At this time, if the sample is almost floating on the water surface,
The thing which settled or melt | dissolved was evaluated as x in two steps.

Spreadability test: 48 mg of the formulation sample was placed in the center of a vat (50 × 60 cm) filled with standard hard water.
Approximately 10c above the water surface while passing through a mesh standard sieve
The sample was dropped from the position of m to one point as much as possible, and the spread state of the sample on the water surface was observed and measured. At this time, the formulation sample rapidly spreads to 1/3 m ² or more, and after being left for 24 hours, a uniform film is formed on the water surface, and when it is not spread, the film is nonuniform. It was evaluated in two stages.

[0019]

[Table 1]

[Comparative Examples 1 to 4] Examples 1 to 1 except that the active ingredient, the carrier and the surfactant have the compounding ratios shown in Table 2.
Each formulation was prepared by mixing and preparing in exactly the same manner as in No. 7, and the above-mentioned tests and the above were conducted for each formulation.
Shown inside.

[0021]

[Table 2]

Next, the following tests were conducted in order to investigate the drug efficacy of the examples and comparative examples.

[Drug efficacy test against Drosophila melanogaster] In a cage (20 × 20 × 30 cm), water for pumping 500
A vat containing 18 ml (18 x 24, 3 cm deep) was placed, and 30 adults of Drosophila melanogaster and 5 final larvae were placed in a cage.
0 animals were released and fed (the insect chow). And
10 mg (20 g / m ³ ) of the preparation samples obtained in Examples 1, 4, 7 and Comparative Examples 1 and 2 were sprayed in the vat. Then, the above test was repeated 3 times to examine the adult mortality rate and the larval emergence inhibition rate, and the results are shown in Table 3. In addition, the results are shown in Table 3 with the blanks given only the above baits.
It was also written inside.

[Pharmaceutical efficacy test against squid squid] A glass beaker containing 1 liter of water for drawing was stored in a cage (20 × 20 ×).
30 cm) and placed in Examples 2 and 5 and Comparative Example 3,
10 mg (10 g / m ³ ) of the sample obtained in No. 4 was sprayed, and 30 adult C. mosquito females and 50 final larvae were released, fed with food (solid feed for insects), and aerated. Then, the above test was repeated three times to examine the adult mortality rate and the larval emergence inhibition rate, and the results are shown in Table 4. The results are also shown in Table 4, with the blanks given only the above diets.

[0025]

[Table 3]

[0026]

[Table 4]

As is clear from the results shown in Tables 2 and 3, the mortality of adults in Comparative Examples 1 and 2 containing no volatile insecticidal component was 1.1 to 5.6%, which was higher than that of adults. Poor insecticidal effect. On the contrary, Comparative Example 4 containing no diffusible insecticidal component was inferior in larval emergence inhibition rate. Further, in Comparative Example 3, which contained both diffusible insecticidal components and volatile insecticidal components but was poor in water floatability and spreadability, sufficient effects were not obtained in both the adult mortality rate and the larval emergence inhibition rate.

On the other hand, as is clear from the results of Table 1, Table 3 and Table 4, Example 1 comprising a diffusible insecticidal component, a volatile insecticidal component and a carrier, and having horizontal floating and spreading properties -7 was a satisfactory control effect for both adults and larvae.

[0029]

[Effect] As described above, the present invention can exterminate larvae and adults of pests that live in water and the space above the water with a single drug formulation almost at the same time. And the pests that live in both environments can be eradicated.

Claims (1)

[Claims] 1. A pest control agent comprising an insecticidal component that is water- or water-diffusible, a volatile insecticidal component, and a carrier that floats these insecticidal components on the water surface as essential components.