JPH09194311A - How to control white crest or purple crest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and efficiently control white root rot and violet root rot by treating soil with a fungicidal composition consisting of a combination of two to four specific kinds of compounds. SOLUTION: This controlling treatment is carried out by using tolclofos- methyl (chemical name: O-2,6-dichloro-p-tolyl O,O-dimethyl phosphorothioate) and one or more compounds selected from isoprothiolane (chemical name: diisopropyl 1,3-dithiolan-2-ylidenemalonate), fuldioxonil (4-cyclopropyl-6-methyl-N- phenylpyrimidin-2-amine) and cyprodinil (chemical name: 4-cyclopropyl-6-methyl- N-phenylpyrimidin-2-amine). The amount of isoprothiolane, fuldioxonil or cyprodinil is 0.05-10 pts.wt., especially about 0.1-5 pts.wt. based on 1 pt.wt. of tolclofos-methyl. The objective plants for the controlling treatment are fruit trees such as pear, peach and apricot.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for controlling white spotted rot or purple spotted rot.

2. Description of the Related Art White spotted rot and purple spotted rot have been known as important diseases for difficult control of various agricultural crops. Currently, as a practical control method for fruit trees such as apples, the roots of crops affected by white rot or purple rot are dug up, the lesions are scraped off, and then the kerb There is a method of treating the name methyl ammonium dithiocarbamate: one of the dithiocarbamate fungicides), but this work is very hard work, and a simpler and more effective control method has been demanded.

[0002]

Under these circumstances, the present inventor has made diligent studies to find an excellent method for controlling white rot and purple rot, and as a result, (a) tolclofos-methyl and (b) ) Using at least one compound selected from isoprothiolane, fludioxonil and cyprodinil as an active ingredient, and using these in combination with soil treatment, the synergistic effect makes it excellent against white rot and purple rot. The present invention has been completed by finding out that it exhibits a controlling effect. That is, the present invention comprises (a) tolclofos-methyl and
(B) A method for controlling white leaf rot or purple leaf rot, which comprises treating the soil with one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil, and a method suitable for use in the method (a The present invention provides a fungicide composition for soil treatment, which comprises tolclofos-methyl and (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil as active ingredients.

[0003]

BEST MODE FOR CARRYING OUT THE INVENTION Torquelphos-methyl [chemical name O-2,6-dichloro-p-tolyl O, O-dimethyl phosphorothioate], isoprothiolane [chemical name diisopropyl 1,3-dithiolane-2-] used in the present invention. Ilidene malonate], fludioxonil [chemical name 4- (2,2-difluoro-1,3-benzodioxol-4-yl) pyrrole-3-carbonitrile] and cyprodinil [chemical name 4-cyclopropyl-
6-methyl-N-phenylpyrimidin-2-amine] is
ThePesticide Manual (10th Edition; Crop Protection Pub
lications; editor: Clive Tomlin), each 992
The compounds described on pages 415, 482 and 161.

In the control method of the present invention, fruit crops (citrus, apple, pear, peach, plum, apricot, sweet cherry, grape,
Oyster, chestnut, etc.), mulberry, tobacco, ginseng,
Examples include tea, asparagus, carrots and lilies.

In the control method of the present invention, the ratio of (a) tolclofos-methyl used as an active ingredient and (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil is not particularly limited, but tolclofos-methyl is used. Isoprothiolane, fludioxonil or cyprodinil is usually in the range of 0.05 to 10 parts by weight, preferably 0.1% by weight.
It is in the range of 1 to 5 parts by weight, and more preferably, isoprothiolane is in the range of 0.5 to 3 parts by weight and fludioxonil is 0.1 parts by weight with respect to 1 part by weight of tolclofos-methyl.
To 2 parts by weight, and cyprodinil in the range of 0.5 to 3 parts by weight. Further, also in the fungicide composition of the present invention suitable for use in the method, the mixing ratio of the active ingredient compound is usually within the above range.

In the control method of the present invention, the active ingredient compounds are usually used alone or in a mixture as a solid carrier,
Mix with liquid carrier or gaseous carrier, and if necessary, add formulation aids such as surfactants, adhesives, dispersants, stabilizers, wettable powders, suspensions, dry flowables, aqueous It is used after being formulated into a liquid agent, an oil agent, a microcapsule agent, and the like. In these formulations, the active ingredient compound is contained alone or in a total amount of usually 1 to 99% by weight, preferably 5 to 90% by weight.

Examples of the solid carrier to be used include clays (kaolin clay, diatomaceous earth, synthetic hydrous silicon oxide, attapulgite clay, bentonite, acid clay, etc.), talc, and other inorganic minerals (sericite, quartz powder, sulfur). Powder, activated carbon, calcium carbonate, hydrated silica, etc.), fine powder or granules such as salts for chemical fertilizers (ammonium sulfate, ammonium phosphate, ammonium nitrate, urea, ammonium salt, etc.) are mentioned.
For example, water, alcohols (methanol, ethanol, etc.), ketones (acetone, methyl ethyl ketone, cyclohexanones), aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene, methylnaphthalene), aliphatic hydrocarbons (hexane, Kerosene etc.), esters (ethyl acetate, butyl acetate etc.), nitriles (acetonitrile, isobutyl nitriles), ethers (dioxane, diisopropyl ether etc.), acid amides (dimethylformamide, dimethylacetamides), halogenated carbonization Examples thereof include hydrogens (dichloroethane, trichloroethylene, carbon tetrachloride, etc.), and examples of the gaseous carrier include butane gas, carbon dioxide gas, fluorocarbon gas and the like.

As the surfactant, alkyl sulfates, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and their polyoxyethylenated products, polyethylene glycol ethers, polyhydric alcohol esters, sugar alcohol derivatives. And so on. As a fixing agent or a dispersant, casein,
Gelatin, polysaccharides (starch, gum arabic, cellulose derivatives, alginic acid, etc.), lignin derivatives, bentonite, sugars, synthetic water-soluble polymers (polyvinyl alcohol,
Polyvinylpyrrolidone, polyacrylic acid, etc.) and the like, and as the stabilizer, PAP (isopropyl acid phosphate), BHT (2,6-di-tert-butyl-4-methylphenol), BHA (2-tert-butyl- Mixtures of 4-methoxyphenol and 3-tert-butyl-4-methoxyphenol), vegetable oils, mineral oils, fatty acids or esters thereof, and the like.

The above-mentioned preparation is applied to the soil as it is or after diluted with water or the like. As a soil treatment method, usual methods such as soil irrigation treatment, soil admixture treatment, and soil fumigation treatment are used, but soil irrigation treatment is preferable especially when treating fruit trees. As the soil irrigation treatment method, (a) tolclofos-methyl formulated or prepared in a liquid form,
A mixture of (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinyl, or (a) tolclofos-methyl and each of (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinyl are irrigated with an irrigation machine. It is generally used and injected into the soil or applied to the surface of the soil, preferably injected into the soil. In the control method of the present invention, further, may be used in combination with other fungicides, insecticides, acaricides, nematicides, herbicides, fertilizers, soil improvers, etc., but especially fertilizers and soil improvers In some cases, the combined use of the two may enhance the effect.

In the control method of the present invention, the application amount of the active ingredient compound varies depending on the type of active ingredient compound, mixing ratio, weather conditions, formulation form, application time, application method, application site, target crop, etc. 1 total amount of active ingredient compounds
Usually 10g to 20kg per are, preferably 20g
10 kg, and when a wettable powder, a suspending agent, a liquid agent or the like is diluted with water and applied, the application concentration of the active ingredient is usually 0.0
It is from 1 to 1% by weight, preferably from 0.01 to 0.5% by weight. In particular, when the control method of the present invention is applied to fruit trees, the application amount of the active ingredient compound is the type of active ingredient compound, mixing ratio, meteorological conditions, formulation form, application time, application method, application site, target crop. The total amount of active ingredient compounds is usually 1 g-100 per fruit tree
g.

[0011]

EXAMPLES The present invention will be described in more detail with reference to formulation examples and test examples, but the present invention is not limited to the following examples. In the following examples, "parts" means "parts by weight" unless otherwise specified. Formulation Example 1 20 parts of tolclofos-methyl; 10 parts of isoprothiolane, fludioxonil or cyprodinil; 3 parts of polyoxyethylenesorbitan monooleate; 3 parts of carboxymethyl cellulose and 64 parts of water, and wet-milled until the particle size becomes 5 microns or less. , To obtain a suspension. Formulation Example 2 30 parts of tolclofos-methyl; 30 parts of isoprothiolane, fludioxonil or cyprodinil; 3 parts of calcium lignin sulfonate; 2 parts of sodium lauryl sulfate and 35 parts of synthetic hydrous silicon oxide are well pulverized and mixed to obtain a wettable powder.

Test Example 1 Strains of white rot fungus that had been cultivated in a bran medium for about 1 month were mixed into soil to prepare soil contaminated with pathogenic bacteria. This contaminated soil was packed in a plastic pot, and apple seedlings (about 5 to 7 leaf stage seedlings) that had been cultivated in a greenhouse in advance were transplanted. Then, the test compound made into a wettable powder according to Formulation Example 2 was diluted with water and injected into the soil.
Cultivated in a greenhouse at ℃ for about 1 month, white crest feather disease incidence (%)
investigated. Table 1 shows the results.

[Table 1]

Test Example 2 Cells of purple rot fungus that had been cultivated for about one month using apple cuttings as a medium were placed on the bottom of a plastic pot together with the cuttings, and the apple seedlings previously cultivated in a greenhouse were placed on it. Seedlings (about 5 to 7 true leaf stage seedlings) were transplanted and covered with soil. Thereafter, the test compound made into a wettable powder according to Formulation Example 2 is diluted with water,
After injecting into soil, it was cultivated in a greenhouse at 24 ° C. in the daytime and 20 ° C. at night for about 3 months, and the incidence (%) of purple rot was investigated. Table 2 shows the results.

[Table 2]

[0014]

EFFECTS OF THE INVENTION According to the present invention, it is possible to easily and efficiently control white rot and purple rot.

Claims (3)

[Claims] 1. A method for controlling white leaf blight or purple leaf blight, which comprises soil-treating (a) tolclofos-methyl and (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil. 2. A white leaf rot or purple leaf rot of fruit trees, which comprises subjecting (a) tolclofos-methyl and (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil to soil irrigation. Control method. 3. A disinfectant composition for soil treatment, comprising (a) tolclofos-methyl and (b) one or more compounds selected from isoprothiolane, fludioxonil and cyprodinil as active ingredients.