JPS5928531B2 - acaricide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acaricide containing the antibiotic salinomycin or a salt thereof as an active ingredient.

Salinomycin is an antibiotic that is effective against staphylococci that are resistant to many drugs discovered in cultures of Streptomyces alpswaxman and Henrich no. be(
(Refer to the specification of Japanese Patent Application No. 19620/1983).

For example, the separation from the culture can be performed by separating the culture with butyl acetate,
This is carried out by extracting with a solvent such as acetone or chloroform, concentrating the extract under reduced pressure, and then subjecting it to column chromatography.

The chemical structure and physicochemical properties of salinomycin thus obtained are [Tetrahedron Letters J (Tetra
Hedron 1etters) 449 (1973) pp. 4955-4958.

As a result of further research, the present inventors discovered that this salinomycin has strong insecticidal and ovicidal properties against mites.

That is, the present invention is an acaricide containing salinomycin or a salt thereof as an active ingredient.

The mites to be controlled by the acaricide of the present invention include, for example, citrus spider mite, apple spider mite, Kanzawa spider mite,
Spider mites such as two-spotted spider mites, false red spider mites, white spider mites, black spider mites, black spider mites, black spider mites, and Smith's spider mites, plant parasitic mites such as rust mites, red mites, and red mites, animal parasitic mites such as house dust mites, red spider mites, red mites, and chiggers; Examples include dust mites.

Salinomycin, which is the active ingredient of the acaricide of the present invention, is
For example, it can also be used as a sodium salt, calcium salt, potassium salt, magnesium salt, ammonium salt, etc., and two or more of these can also be used in combination.

The acaricide of the present invention can be used in the form of emulsions, granules, powders, irrigation agents, aerosols, and the like.

For example, clay, diatomaceous earth, talc, white carbon, bentonite, water, organic solvent, air, freon, etc. are used as carriers, and additives such as various spreading agents, emulsifiers, dispersants, wetting agents, etc. are used in combination, if desired. You can also.

The acaricide of the present invention is an insecticide, a fungicide, a herbicide, a planting preparation,
It can also be used in combination with various agricultural chemicals such as other acaricides, fertilizers, external veterinary drugs, repellents, etc.

The acaricide of the present invention is applied to the eggs, larvae, and adults of mites depending on the purpose of use, and is applied by soil treatment, foliar spraying, residual spraying on barns, chicken houses, etc., or local application. use.

The amount used varies depending on the target to be controlled, but when used for the purpose of controlling mites that parasitize animals, it is usually preferable to use an appropriate amount at a concentration of 25 to 50 ppm.

When used for the purpose of controlling mites parasitic on plants, the purpose can be achieved by using salinomycin at a concentration of 25 to 11,000 pp, usually at a rate of 10 to 200 g per 10 are.

The acaricide of the present invention exhibits an excellent acaricidal effect as shown in the test examples described later.

Parts in the following examples mean parts by weight.

Example 1 10 parts of salinomycin sodium salt is dissolved in a mixture of 35 parts of xylene and 50 parts of dimethylformamide, and 5 parts of alkylarylpolyoxyethylene is added thereto to form an emulsion.

Dilute this appropriately with water and spray.

Example 2 0.1 part of salinomycin sodium salt, 5 parts of white carbon, 60 parts of clay, and 34.9 parts of talc are mixed and ground to form a powder.

Example 3 To 10 parts of salinomycin sodium salt were added 15 parts of white carbon, 40 parts of clay, ±30 parts of diatoms, and 5 parts of a wetting agent (a mixture of 2 parts of alkylbenzenesulfonic acid and 1 part of genin sulfonate). Use as an irrigation agent.

Dilute this appropriately with water and spray.

Test Example 1 Effect on adult mites Green bean seedlings were cultivated, and 20 adult Kanzawa spider mites were placed in each section on the cotyledons, and Example 1 was applied to this in duplicate.
The emulsion obtained by diluting the emulsion with water so that the salinomycin concentration became the value shown in Table 1 was sprayed.

After the chemical treatment, the samples were kept in a constant temperature room at 25° C. for 24 hours, and the acaricidal effect was examined.

The results are shown in Table 1.

Test Example 2 Effect on mite eggs Green bean seedlings were cultivated, and Kanzawa spider mite 10 was added to the cotyledons.
After placing eggs and allowing them to lay eggs day and night, the adults were removed and an emulsion obtained using the emulsion of Example ↓ was sprayed.

After the drug treatment, the eggs were kept in a constant temperature room at 25° C. for 6 days, and the percentage of uncooked eggs was examined.

The results are shown in Table 2.

Test Example 3 Effect on mite-induced larvae The emulsion obtained using the emulsion of Example 1 was sprayed onto the cotyledons of kidney bean seedlings that had been infected with Kanzawa spider mites in the same manner as in Test Example 2.

After the chemical treatment, the specimens were kept in a thermostatic chamber at 25° C. for 24 hours, and the insecticidal rate was measured.

The results are shown in Table 3.

Test Example 4 Female adult spider mites were inoculated at a rate of 5 per leaf of common red bean at the first stage of leaf development, and the test was conducted in a greenhouse.

After 4 or 10 days, each concentration of salinomycin emulsion was thoroughly sprayed on both the front and back of the leaves using a small spray gun, and after a certain period of time, the leaves were cut off and the number of survivors on each side of the growth stage was examined.

The results are shown in Tables 4 and 5.

(1) Spreading 4 days after inoculation with female adults. Condition of the plant at the time of spraying: Compound leaf buds begin to grow at the core of the expanded leaves.

Status of spider mites: Eggs just before becoming bamboo shoots (2) Spreading 10 days after inoculating adult females Plant status at the time of spraying: The first and second palmate compound leaves open, and the buds of the second palmate compound leaves begin to grow. .

Status of spider mites: Most are second nymphs, some first nymphs and adults are also present.

Claims (1)

[Claims] 1. Acaricide containing salinomycin or its salt as an active ingredient.