JPS6017763B2 - Sterilizing composition for controlling rice blast disease - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel fungicidal composition that exhibits both prophylactic and therapeutic effects, particularly against phimosis.

The three major diseases of rice are known as potato leaf blight, sheath blight, and white hollyhock blight, and among them, potato leaf blight causes a large decrease in yield, so control measures are particularly important.

Up to now, many organophosphorus agents, organochlorine agents, and antibiotics have been proposed as control agents for potato blight, but these agents only show either preventive or therapeutic effects. Therefore, when using it, it is necessary to use it properly depending on the purpose.
Had to spray more than once. The present inventors have conducted extensive research in order to overcome the drawbacks of conventional fungicides and develop a fungicide that has both preventive and therapeutic effects against potato bacterium. It was discovered that the purpose could be achieved by using a combination of monomethylbenzanilide and 5-methyl-1,2,4-triazolo(3,41b)penzothiazole, and based on this knowledge, the present invention He came up with an invention.

That is, the present invention provides 2-methylbenzanilide and 5-methyl-1,2,4-triazolo (3141b) represented by the general formula (in the formula, x represents a hydrogen atom, an alkyl group, or an alkoxy group). The present invention provides a fungicidal composition for controlling potato groin disease, which is characterized in that it contains a combination of penzothiazole and penzothiazole as an active ingredient.

2- of the general formula used as one component of the present invention
Methylbenzanilide is effective in controlling diseases such as rice sheath blight, sheath blight of various crops, and soil disease, and has systemic transfer properties to plant tissues, but it can be used at normal spray concentrations to prevent corn blight. shows almost no control effect.

In contrast, the other component, 5-methyl-1.2
・4-triazolo(3.4-b)penzothiazole is
For example, as described in Tokukan Sho 48-6149, it shows a preventive effect on Imochi disease, but it shows almost no therapeutic effect at normal spray concentrations. However,
According to the invention, 2-methylbenzanilide of the general formula and 5-methyl-1,2,4-triazolo(3,41b)
The unexpected result was that when used in tandem with penzothiazole, it could have a preventive and therapeutic effect on pimply disease even at lower application concentrations than when each was used alone. It will be done.

Therefore, the fungicidal composition of the present invention has the advantage that the spraying timing can be easily set and the number of sprayings can be reduced.

Examples of 2-methylbenzanilide represented by the above general formula include 2-methylbenzanilide and N-(3-
ethyl phenyl)-2-ethylbenzamide, N-(3
-propylphenyl)-2-methylbenzamide, N-
Examples include (3-isopropoxyphenyl)-2-methylbenzamide and N-(3-sec-butoxyphenyl)-2-methylbenzamide. These 2-methylbenzanilides have a weight ratio of 1 to 5-methyl-1,214 triazolo(3,41b)penzothiazole.
: 1 none, 5:1 preferably 1:1 none, 3:1.

The sterilizing composition of the present invention is prepared by adding a carrier, diluent, surfactant, dispersant, and auxiliary agent to the above-mentioned active ingredient as necessary.

These are prepared in the form of powders, wettable powders, flowables (suspended viscous liquid preparations, granules, etc.), and are sprayed as they are or after being diluted to an appropriate concentration before use. In particular, granule forms have the advantage of being easy to spread, and flowable forms have the advantage of providing a dispersing agent with good storage stability. By adding 0.0-dimethyl-4-nitro-1-m-tolyl phosphorothionate to the fungicidal composition of the present invention as an auxiliary component, the control effect can be further enhanced without causing chemical damage.

In addition, various fungicides, insecticides, and herbicides commonly used in agricultural and horticultural fungicides can also be blended. These disinfectants include antibiotics such as Blasticidin S, polyoxin, kasugamycin, and validamycin, and chlorinated agents such as tetrachloroisophthalonitrile, 4,5,6,7-tetrachlorophthalide, and bentachloronitrobenzene. Compound tBasic copper chloride [CuC12・$u(OH
)2], organic steel agents such as 8-hydroxyquinoline steel, organic arsenic agents such as iron ammonium methanarsonate, S-pendylethylphenyl phosphorothiolate, 0-ethyl Organic phosphorus agents such as S.S.-diphenylphosphorodithiolate, 0.0-diisopropyl-S-benzylthiophosphate, as well as N-trichloromethylthio-4-cyclohexene-1.2-dicarpoximide, diisopropyl -1,3-dithiolane-2-ylidemalonate, methyl-1-(butylcarbamoyl)-12-benzimidazole carbamate, 1.
2-bis(3-ethoxycarbonyl-2-thioureido)benzene, 1,2-bis(3-methoxycarbonyl-
2-Thioureido)benzene (3-hydroxy-5-methylisoxazole potassium, 2-chloro6-methoxy-4-trichloromethylpyridine, 1-isopropylcarbamoyl-3-(3,5-dichlorophenyl)-hydantoin, etc.) In addition, as insecticides, 0,0-jethyl-○-(2-isopropyl-4-methyl-6-pyrimidinyl)-phosphorothioate, 2-chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate , 2-Kuroro 1-(2
- 4-dichlorophenyl) vinyl dimethyl phosphate, 2-k.

Rho 1-(2,4-dichlorophenyl)pinyl diethyl phosphate, 2,2-dichlorovinyl dimethyl phosphate, 4-cyanophenyl ethyl phenyl phosphonothionate, 0,0-dimethyl-4-methylthio m-triphos Holothionate, 0,0-dimethyl-○-(4
-Methylthiol (tolyl) phosphorothionate, S-[1,2-diethoxycarbonylethyl]-0,0-dimethylphosphorodithiolate, 4-nitrophenylethyl phenylphosphonothionate, 0,S-dimethyl-N
-Organophosphorus insecticides such as acetyl phosphoramidothioate, 0,0-dimethyl-○1(3,5,6-trichloro2'pyridyl)phosphorothate, 1-naphthylmethylcarbamate, 3-tolyl-N-methyl Carbamate insecticides such as carbamate, 0-tert-butylphenylmethyl carbamate, 3,4-xylyl-N-methyl carbamate, 2-isopropylphenyl-N-methyl carbamate, and S.S'-(2-dimethylaminotrimethylene ) bisthiocarbamate, N′-(4
-chloro-2-tolyl)-N.N-dimethylformamidine. Furthermore, as herbicides, P-nitrophenyl-2,4,6-trichlorophenyl ether, S-(4-chlorobenzyl)-N,N-diethylthiol carbamate, N6-benzylaminopurine, 2-chloro-2,6 -diethyl-N-butoxymethylacetanilide, S-ethylhexahydro-IH-
Examples include azepine-1-carbothioate.

Any of the above compounds may be used alone, or two
More than one species may be mixed and used.

Next, the present invention will be explained in more detail with reference to Examples.

Example 1 3 parts by weight of N-(3-ethylphenyl)-2-methylbenzamide (hereinafter referred to as penzanilide A), 5-methyl-1,2,4-triazolo(3,41b)penzothiazole (hereinafter referred to as EL- 291) and 9 parts by weight of a mixture of equal amounts of Yuruk and clay were uniformly mixed and pulverized to prepare a powder.

Example 2N-(3-impropoxyphenyl)-2-methylbenzamide (hereinafter referred to as penzanilide B) 2
A wettable powder was prepared by uniformly pulverizing 5 parts by weight, EL-29125 parts by weight, 45 parts by weight of Diatomycin, 3 parts by weight of sodium dodecylbenzenesulfonate, and 2 parts by weight of sodium ligninsulfonate.

Example 3 3 parts by weight of N-(3-sec-butoxyphenyl)-2-methylbenzamide (hereinafter referred to as penzanilide C), EL
-2911 parts by weight, 3 parts by weight of white carbon, 3 parts by weight of bentonite 2, 4 parts by weight of talc, 1 part by weight of clay 2, 1 part by weight of sodium lauryl sulfate, and 3 parts by weight of sodium ligninsulfonate were uniformly mixed and pulverized. The mixture was kneaded with a small amount of water, granulated into hard granules, and dried to prepare granules.

Example 4 A flowable formulation was prepared by stirring a mixture having the following composition for 2 minutes using a homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd., TYPEHV-1).

Test Example 1 Test for the therapeutic effect of Imochi disease Two rice seeds (cultivar Aichi Asahi) were sown in a clay pot with a diameter of 12 mm, and when the rice reached the 4th to 5th leaf stage, the diseased leaves of Imochi disease were sown. Collected spore suspension of Imochi fungus (microscope 1)
5M sound, 1 field of view, 15M solid) was spray inoculated at 5cc per pot.

Immediately after inoculation, place it in an inoculation chamber with a saturated humidity of 250℃.
After keeping them for a day, they were taken into the greenhouse and sprayed with chemicals. Spray the chemicals diluted with water using a turntable and spray gun at 20 c per 3 pots from a distance of 1 m.
c Depending on the method of spraying. After air-drying the spray solution, repot the pot for 25 minutes.
qo, placed in an inoculation room with saturated humidity, and after 5 days, the number of lesions per gall was calculated, and the therapeutic effect (control value) was calculated using the following formula. The results are shown in Table 1. Treatment effect (control value) = number of untreated lesions - number of treated lesions XI.

〇Number of untreated lesions Table 1

Claims (1)

[Claims] 1 2-methylbenzanilide and 5-methyl-1 represented by the general formula ▲ Numerical formula, chemical formula, table, etc. ▼ (X in the formula represents a hydrogen atom, an alkyl group, or an alkoxy group) - A fungicidal composition for controlling rice blast disease, which contains a combination of 2,4-triazolo(3,4-b)benzothiazole as an active ingredient. 2. The fungicidal composition for controlling rice blast according to claim 1, which is in the form of a powder. 3. The fungicidal composition for controlling rice blast disease according to claim 1, which is in a flowable form. 4 2-Methylbenzanilide and 5-methyl-1.2.
2. The fungicidal composition for controlling rice blast disease according to claim 1, wherein the mixing ratio with 4-triazolo(3.4-b)benzothiazole is selected in the range of 1:5 to 5:1 by weight. 5 0.0-dimethyl-4-nitro-m as an auxiliary component
- The fungicidal composition for controlling rice blast disease according to claim 1, which contains tolyl phosphorothionate.