JPH0613442B2 - Agro-horticultural fungicide composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to an agricultural and horticultural fungicide composition, and more specifically, to an N-pyridylaniline compound and another specific compound as effective components. The present invention relates to an agricultural and horticultural germicide composition.

(Problems to be Solved by the Prior Art and Invention) Although many agricultural and horticultural fungicides have been provided in the past for controlling harmful diseases occurring in crops, improvements are still desired in various aspects. There is.

The present inventors have previously found that the N-pyridylaniline compound represented by the following general formula exhibits an excellent growth inhibitory effect against pathogens such as gray mold, scab and the like, which are harmful to agriculture and horticulture. . However, this N-pyridylaniline compound is not sufficiently effective against specific pathogenic bacteria such as powdery mildew, and has a drawback that the therapeutic effect is slightly inferior to the preventive effect against each pathogenic bacterium. Had.

(Background of Invention) As a result of studies to solve these drawbacks, the present inventors have found that the use of N-pyridylaniline compounds in combination with other specific compounds has an effect like powdery mildew. It also shows bactericidal activity against pathogens that were not sufficient,
It was found that a high control activity, which cannot be expected by individual application, was observed, and further that the application rate could be reduced as compared with the case of single application, whereby a synergistic effect by the mixed application was obtained. Further, they have found that the practicality is improved because a therapeutic effect is obtained in addition to the preventive effect.

DISCLOSURE OF THE INVENTION That is, the present invention has the general formula: (Wherein, X is a halogen atom or a trifluoromethyl group, Y is a hydrogen atom or a halogen atom, and n is an integer of 1 to 4), and at least one of N-pyridylaniline compounds The present invention relates to an agricultural and horticultural fungicide composition containing as an active ingredient at least one selected from the group consisting of other specific compounds shown in Table 1 below. N- which is an N-pyridylaniline compound represented by
Agro-horticultural sterilization containing (3-chloro-5-trifluoromethyl-2-pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline and tetrachloroloisophthalonitrile as active ingredients It is an agent composition.

In the above general formula, the halogen atom is a fluorine atom,
Examples thereof include chlorine atom, bromine atom and iodine atom.

Examples of the N-pyridylaniline compound represented by the above general formula include N- (3-chloro-5-trifluoromethyl-2-pyridyl-2,6-dinitro-3-chloro-4-trifluoromethylaniline ( Hereinafter, abbreviated as NPA), N- (3-bromo-5-trifluoromethyl-2)
-Pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline, N- (3-chloro-5-trifluoromethyl-2-pyridyl) -2,6-dinitro-3-bromo-4 -Trifluoromethylaniline, N-
(3-Trifluoromethyl-5-chloro-2-pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline, N- (3,5-dichloro-6-trifluoromethyl-2- Pyridyl) -2,6-dinitro-
3-chloro-4-trifluoromethylaniline, N-
(2-chloro-4-trifluoromethyl-3-pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline and the like can be mentioned.

In addition, examples of the other specific compound include the compounds shown in Table 1 below, which are generally well known.

Next, a test example according to the present invention will be described.

Test Example 1. Cucumber powdery mildew prevention effect test Cucumber (variety: four leaves) is cultivated in a 9 cm diameter clay pot, and 10 ml of an aqueous dispersion containing each predetermined concentration of the test compound X and Y is sprayed when reaching the 1-leaf stage. It was sprayed with a gun. After allowing to stand overnight in a greenhouse at 24 to 25 ° C., conidia of powdery mildew fungi were sprinkled and inoculated from the pathogenic bacteria. Inoculation 1
On day 0, the degree of disease on the first leaf was investigated, and the degree of disease in the untreated section was set to 100, and the degree of disease in each treated section was calculated as a percentage with 0 as no disease, and the results are shown in Tables 2-1 to 2-6. Got the result.

Test example 2. Oat crown rust prevention test Oat (cultivar: advance) is cultivated in a clay pot with a diameter of 9 cm,
When the leaf stage 1 was reached, 20 ml of an aqueous dispersion containing each predetermined concentration of the test compounds X and Y was sprayed using a spray gun. After leaving it in a greenhouse at 20 ° C. for a whole day and night, the spores of crown rust fungus were sprinkled on the diseased seedlings and inoculated. On the 10th day of inoculation, the degree of disease on the first leaf was investigated and the disease incidence was determined in the same manner as in Test Example 1 above.

The results are shown in Tables 3-1 to 3-6.

Test example 3. Cucumber downy mildew prevention test Cucumber (variety: four leaves) was cultivated in a biscuit pot with a diameter of 9 cm, and when reaching the two-leaf stage, 10 ml of an aqueous dispersion containing each predetermined concentration of each test compound X and Y was added. , Using a spray gun. After leaving it in a greenhouse at 24 to 25 ° C. for 24 hours, it was spray-inoculated with a spore suspension of downy mildew. On the 5th day after the inoculation, the number of lesions on the first leaf was investigated, and the degree of disease in the untreated plot was set to 100, and the degree of disease in each treated plot was calculated as a percentage, and the results in Table 4 were obtained. It was

Test example 4. Cucumber gray mold prevention test Cucumber (variety; four leaves) is cultivated in a clay pot with a diameter of 9 cm,
When the 1-leaf stage was reached, 10 ml of an aqueous dispersion containing each predetermined concentration of each of the test compounds X and Y was sprayed using a spray gun. After allowing to stand overnight in a greenhouse at 24 to 25 ° C, a disc of Botrytis cinerea, which had been previously cultured in potato and glucose agar medium (PDA medium), was placed on the leaves and inoculated. On the 3rd day after the inoculation, the disease group length of the first leaf was investigated, and the degree of disease in the untreated section was set to 100, and the degree of disease in each treated section was calculated as a percentage, and the degree of disease in each treated section was calculated as a percentage. Tables 5-1 to 5-5 Got the result.

As can be seen from the above test examples, the bactericidal composition of the present invention has an excellent bactericidal effect as compared with the application of each single agent.

That is, by mixing the N-pyridylaniline compound with a specific fungicide, more than expected from each single agent,
An excellent control effect was obtained at a considerably low concentration, and a wide range of effects were observed against pathogenic bacteria that could not be expected by applying each single agent.

The fungicide composition of the present invention is infected with harmful pathogens, or cultivated crops with the fear thereof, for example, cucumber, tomato, sugar beet such as eggplant, rice, cereals such as barley, legumes, apples, Pear, grapes, exhibit excellent bactericidal action by applying to fruit trees such as citrus fruits, for example, powdery mildew, rust, downy mildew, anthracnose, gray mold, scab, and spot leaf disease. It is suitable for controlling red scab, blast, leaf blight, seedling blight, white silkworm, etc., but for controlling powdery mildew, rust, downy mildew, gray mold and scab. Optimal.

The fungicide composition of the present invention, as in the case of ordinary pesticides,
The active ingredient may be diluted with water as it is and mixed and applied, or it may be mixed with various auxiliary agents and formulated and applied in the form of emulsion, wettable powder, granule and the like.

In addition, the active ingredients are individually mixed and formulated with auxiliary agents,
You may mix them.

As the auxiliary agent, diatomaceous earth, slaked lime, calcium carbonate, talc, white carbon, kaolin, bentonite, solid carriers such as sikhlite, toluene, xylene, solvent naphtha, ethanol, dioxane, acetone, isophorone, methyl isobutyl ketone, Dimethylformamide, dimethyl sulfoxide, N-methyl-2
-Solvents such as pyrrolidone, sodium alkyl sulfate, sodium alkylbenzene sulfonate, sodium lignin sulfonate, polyoxyethylene glycol alkyl ether,
Examples thereof include spreading agents such as polyoxyethylene lauryl ether, polyoxyethylene alkylaryl ether, polyoxyethylene sorbitan fatty acid ester, and surfactants.

The application concentration of the fungicide composition of the present invention varies depending on conditions such as the formulation form of the drug, the time of application, the type of harmful bacterium, and therefore cannot be specified unconditionally, but generally, the N-pyridylaniline compound is 1 to 10,000 ppm. , Other bactericidal compounds are 1 to 10,000 ppm, preferably the former 10
1,000 ppm, the latter is 10-1,000 ppm.

Formulation Examples 1 to 6 (1) N- (3-chloro-5-trifluoromethyl-2-
Pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline 25 parts by weight (2) Compound NO. 3, 10, 14, 19, 22 or 252
5 parts by weight (3) Sikhlite 45 parts by weight (4) Sodium lignin sulfonate 5 parts by weight The above components were uniformly mixed to obtain a wettable powder.

Formulation Examples 7 to 12 (1) N- (3-chloro-5-trifluoromethyl-2-
Pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline 2.5 parts by weight (2) Compound NO. 2, 12, 15, 17, 23 or 26
2.5 parts by weight (3) Talc 95 parts by weight The above ingredients were uniformly mixed to obtain a powder.

Claims (1)

[Claims] 1. N- which is an N-pyridylaniline compound represented by
Agro-horticultural fungicide containing (3-chloro-5-trifluoromethyl-2-pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline and tetrachloroisophthalonitrile as active ingredients Composition.