JPH0580442B2 - - Google Patents

Description

[Detailed description of the invention]

(1) Purpose of the invention Industrial application field The present invention provides a novel acaricide that can effectively control mites such as spider mites, red spider mites, dust mites, and rust mites that cause damage to agricultural and horticultural crops. Concerning what to do. More specifically, the present invention relates to an acaricide characterized by containing the antibiotic kasugamycin or its salts (hereinafter collectively referred to as "KSM") as an active ingredient. Therefore, it can be effectively used in agriculture, particularly in the pesticide manufacturing industry and the agricultural and horticultural fields. Prior Art KSM of the present invention is a water-soluble weakly basic antibiotic produced by Streptomyces kasugaensis, a type of actinomycete, and has low toxicity to humans and livestock.
It is widely used as having a strong control effect against rice blast. Its properties are described, for example, in Japanese Patent Publication No. 42-6815 and Japanese Patent Publication No. 41-21757,
It is known from pages 162 to 164 of "Agricultural Handbook 1981 Edition" (published by the Japan Plant Protection Association). However, it is not known that KSM has acaricidal activity. Problems to be Solved by the Invention It has been known that KSM exhibits bactericidal activity, but it is not known that it has acaricidal activity. Therefore, it is an object of the present invention to provide a new technique for using KSM with activities other than bactericidal activity, particularly as an effective acaricide. (2) Means for solving the structural problems of the invention The present inventors have conducted extensive research in order to solve the above-mentioned objectives. As a result, it was found that a miticide characterized by containing KSM as an active ingredient met the purpose and was extremely effective. Effects In the present invention, KSM acts as an acaricidal active ingredient against mites such as two-spotted spider mite, Kanzawa spider mite, and orange spider mite. Moreover, KSM shows no acaricidal activity when applied at the usual concentration (20 ppm) as a rice blast control agent;
When treated at a concentration 2 to 5 times that amount, it exhibits extremely strong acaricidal activity. Examples (Method for producing and using acaricide) The present invention is carried out as follows. That is, to produce the acaricide of the present invention, the active ingredient of the present invention and appropriate carriers and adjuvants, such as surfactants, binders, stabilizers, etc., are blended, and the following is carried out by a conventional method: It can be formulated into wettable powders, emulsions, liquids, sol (flowable), powders, DL (driftless) powders, fine granules, etc. The active ingredient content of the present invention in these formulations is:
1 to 90% for wettable powders, emulsions, liquids, and sol formulations
(wt%: the same applies hereinafter), in the case of powders, DL powders, and fine granules, it can be contained in the range of 0.1 to 5%, and in the case of granules, it can be contained in the range of 1 to 10%. In the above, the carrier that can be used is either solid or liquid, as long as it is commonly used for agricultural and horticultural chemicals, and is not limited to a specific carrier. For example, fixed carriers include mineral powders (kaolin, bentonite, clay, montmorillonite, talc, diatomaceous earth, mica, silica sand, ammonium sulfate, urea, etc.), vegetable powders (soybean flour, wheat flour, wood flour, tobacco flour, starch, (crystalline cellulose, etc.), alumina, silicates, sugar polymers, highly dispersed silicic acid, waxes, etc. In addition, as a liquid carrier, water, alcohols (methyl alcohol, ethyl alcohol, n-propyl alcohol, iso-propyl alcohol,
n-butyl alcohol, ethylene glycol, benzyl alcohol, etc.), aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene,
chlorobenzene, cumene, methylnaphthalene, etc.), halogenated hydrocarbons (chloroform, carbon tetrachloride, dichloromethane, chloroethylene, trichlorofluoromethane, dichlorodifluoromethane, etc.), ethers (ethyl ether, ethylene oxide, dioxane, tetrahydrofuran, etc.) , ketones (acetone, methyl ethyl ketone, cyclohexanone, methyl isobutyl ketone, etc.), esters (ethyl acetate, butyl acetate,
ethylene glycol acetate, amyl acetate, etc.), nitriles (acetonitrile, propionitrile, acrylonitrile, etc.), sulfoxides (dimethyl sulfoxide, etc.), alcohol ethers (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, etc.), aliphatic or Examples include alicyclic hydrocarbons (n-hexane, cyclohexane, etc.), industrial gasoline (petroleum ether, solvent naphtha, etc.), and petroleum fractions (paraffins, kerosene, light oil, etc.). In addition, emulsions, hydrating agents, sol agents (flowable agents),
When preparing such formulations, surfactants (or emulsifiers) are used for the purposes of emulsification, dispersion, solubilization, wetting, foaming, lubrication, spreading, etc. Examples of such surfactants include those shown below, but of course the surfactants are not limited to these examples. Nonionic polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkyl ester, sorbitan alkyl ester, etc. Anionic alkylbenzene sulfonate, alkyl sulfoxanate, alkyl sulfate, polyoxyethylene alkyl sulfate, aryl sulfonates, etc. Cationic alkylamides (laurylamine, stearyltrimethylammonium chloride, alkyldimethylbenzylammonium chloride, etc.), polyoxyethylene alkylamides, etc. Amphoteric carboxylic acids (betaine type), sulfuric esters, etc. In addition to these, polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC),
Various adjuvants such as gum arabic, polyvinyl acetate, gelatin, casein, sodium alginate, gum tragacanth, etc. can be used.
Further, if necessary, a suitable amount of stabilizers such as antioxidants and ultraviolet absorbers can be added. In addition, the acaricide of the present invention may be used as an insecticide such as various other acaricidal ingredients, bactericidal ingredients, organophosphorus insecticides, carbamate agents, pyrethroid agents, chitin synthesis inhibitors, attractants, repellents, herbicides, etc. , plant growth regulators, fertilizers, etc. By mixing them, it is possible to expand the applicability (applicable pests, methods of use, timing of use, etc.). Some examples of formulations of the acaricide of the present invention are shown below, but the present invention is not limited thereto. Note that all compounding ratios in the examples are parts by weight. Example 1 Wettable powder: 5 parts of KSM hydrochloride, 2 parts of white carbon, 3 parts of sodium dodecylbenzenesulfonate, 2 parts of sodium ligninsulfonate, and 88 parts of clay are pulverized and mixed, and then mixed uniformly to obtain a wettable powder. . Example 2 Powder KSM hydrochloride 0.2 parts, white carbon 2.0 parts,
0.3 parts of PAP (physical property improver) and 97.5 parts of clay are mixed and ground uniformly to obtain a powder. Example 3 Liquid Agent 10 parts of KSM hydrochloride, 10 parts of polyoxyethylene nonyl phenyl ether, and 80 parts of water are uniformly stirred and mixed to obtain a liquid agent. (3) Effects of the Invention The first feature of the acaricide of the present invention is that it contains known acaricides such as dicofol, fosalone, chlorbenzilate, tetradifon, CPCBS, benzomate, and amitraz [these are listed in the "Pesticide Handbook".
1981 Edition], etc.),
It has a remarkable acaricidal effect against mites, which have already developed antibiotic properties, and is also difficult to develop drug resistance against mites. The second feature is that although it is not as fast-acting as general acaricides, it acts on larvae and nymphs, so it can suppress the density of mites on agricultural and horticultural crops for a long period of time. The third feature is that it exhibits a complete control effect on mites such as two-spotted spider mites and citrus spider mites on agricultural and horticultural crops at a lower concentration than conventional acaricides. Furthermore, the fourth characteristic is that it has low toxicity to fish and mixed-breed animals, and there is no risk of causing environmental pollution. Because it has the above characteristics, KSM is
It can be effectively used as a control agent for mites such as two-spotted spider mite, false red spider mite, Kanzawa spider mite, citrus spider mite, apple spider mite, and red spider mite in areas where fruit trees, tea, vegetables, flowering trees, etc. are cultivated. Next, test examples will be given regarding the effects of the acaricide of the present invention. Test Example 1 Effect test on two-spotted spider mites (larvicidal effect) A kidney bean leaf cut out to a diameter of 3 cm was placed with the underside of the leaf facing up on 0.5% agar gel poured into a 9 cm glass shear dish. In addition, 10 female adult two-spotted spider mites resistant to Kelsen and organophosphorus acaricides were added to each of the French bean leaf dates.
Each head was inoculated and allowed to lay eggs for 24 hours. After 24 hours, all female adults were removed and left at a constant temperature of 25°C for 5 days. When about half of the larvae had hatched from the eggs, 5 ml of the diluted solution of the wettable powder prepared in Example 1 at a predetermined concentration was sprayed using a rotary chemical spray tower (manufactured by Mizuho Rika Co., Ltd.). Thereafter, the plants were placed at a constant temperature of 25°C again, and the number of living and dead plants was determined after 3 days to determine the control value (%). This test was conducted using a system of 3 leaf disks per chemical treatment area, and the average control value (%) was calculated. The results are shown in Table 1.

[Table] Test Example 2 Control effect test against two-spotted spider mites Green beans at the first true leaf development stage planted in black vinyl pots with a side size of 6 cm show resistance to dicofol and organophosphorus acaricides during successive rearing. 20 adult female two-spotted spider mites are inoculated per pot and colonized.
I laid eggs. After 24 hours, a diluted solution of the present invention prepared in Example 3 at a predetermined concentration was sprayed at a rate of 30 ml per pot. Then boil the pot at 25℃.
After 14 days, the number of parasitic next-generation female adult two-spotted spider mites was determined to determine the control value (%). This test was conducted using a three-pot system per chemical treatment area, and the average control value (%) was calculated. The results are shown in Table 2.

[Table] Test Example 3 Control effect test on orange spider mites At the Okitsu Wase tangerine orchard where orange spider mites are prevalent, a predetermined concentration dilution of the hydrating powder of the present invention prepared according to Example 1 was applied using a power sprayer for 10 minutes.
The equivalent of 300 was sprayed per area. Just before spraying,
1 day after 3 days, 7 days, 14 days and 30 days after spraying.
The number of female adult spider mites infesting any 100 leaves per tree and the chemical damage were determined, and the control value (%) was determined. This test was conducted with one tree per five plots per chemical treatment plot, and the average control value (%) was calculated. The results are shown in Table 3.

[Table] Ward

Claims (1)

[Claims] 1. An acaricide characterized by containing the antibiotic kasugamycin or its salts as an active ingredient.