JPH06219912A - Agricultural and horticultural germicidal composition - Google Patents

Abstract

PURPOSE:To obtain an agricultural and horticultural germicidal composition comprising an N-pyridylaniline-based compound and other specific compounds as active ingredients. CONSTITUTION:This agricultural and horticultural germicidal composition comprises N-(3-chloro-5-trifluoromethyl-2-pyridyl)-2,6-dinitro-3-chloro-4- trifluoromethylaniline which is an N-pyridylaniline-based compound expressed by the formula and 3'-isopropoxy-o-toluanilide or alpha,alpha,alpha-trifluoro-3'-isopropoxy-o- toluanilide as active ingredients.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural and horticultural fungicide composition, and more particularly to an agricultural and horticultural fungicide composition containing an N-pyridylaniline compound and another specific compound as active ingredients. Regarding things.

[0002]

2. Description of the Related Art Conventionally, many agricultural and horticultural fungicides have been provided for controlling harmful diseases occurring in crops, but improvements in various aspects are still desired.

[0003]

DISCLOSURE OF THE INVENTION The present inventors previously found that the N-pyridylaniline compound represented by the following formula is excellent in growth against pathogenic bacteria such as gray mold, scab and the like, which are harmful to agriculture and horticulture. It was found that the inhibitory effect was exhibited. However, this N-pyridylaniline compound is not sufficiently effective against specific pathogens such as powdery mildew,
Further, it has a drawback that the therapeutic effect is slightly inferior to the preventive effect against each pathogenic bacterium.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have studied to solve these drawbacks, and as a result, by using an N-pyridylaniline compound in combination with another specific compound, it is possible to prevent powdery mildew. It also shows bactericidal activity against pathogens that were not sufficiently effective against each other, and each has a high control activity that cannot be expected when applied alone, and the applied amount can be reduced compared to when applied alone. It has been found that a synergistic effect can be obtained. Further, they have found that the practicality is improved because a therapeutic effect is obtained in addition to the preventive effect. That is, the invention has the formula:

[0005]

[Chemical 2]

N- (3-chloro-5-trifluoromethyl-), which is an N-pyridylaniline compound represented by
2-pyridyl) -2,6-dinitro-3-chloro-4-
Trifluoromethylaniline (hereinafter abbreviated as NPA) and 3'-isopropoxy-O-toluanilide (hereinafter abbreviated as Basitac) or α, α, α-trifluoro-3′-isopropoxy-O-toluanilide ( Hereinafter, abbreviated as "Moncat") as an active ingredient.

Further, as the other specific compound,
The compounds shown in Table 1 below are mentioned and are generally well known. However, the compound N described below is preferable.
o. 25 and 26.

[0008]

[Table 1]

[0009]

[Table 2]

[0010]

[Table 3]

[0011]

[Table 4]

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 biscuit pot with a diameter of 9 cm, and when reaching the 1-leaf stage, 10 ml of an aqueous dispersion containing each predetermined concentration of the test compound X and Y is sprayed. 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. On the 10th day after the inoculation, the lesion degree 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. The results shown in Table 6 were obtained.

[0013]

[Table 5]

[0014]

[Table 6]

[0015]

[Table 7]

[0016]

[Table 8]

[0017]

[Table 9]

[0018]

[Table 10]

Test Example 2. Oat crown rust prevention test Oat (cultivar: Advance) is cultivated in a biscuit pot with a diameter of 9 cm, and when reaching the 1-leaf stage, 20 ml of an aqueous dispersion containing each of the test compounds X and Y at a predetermined concentration is spray-gun. Sprayed on. 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 after the inoculation, the degree of lesion 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
It is shown in Table-6.

[0020]

[Table 11]

[0021]

[Table 12]

[0022]

[Table 13]

[0023]

[Table 14]

[0024]

[Table 15]

[0025]

[Table 16]

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 2-leaf stage, 10 ml of an aqueous dispersion containing each of the test compounds X and Y at each predetermined concentration was added. , Using a spray gun. After leaving it in a greenhouse at 24 to 25 ° C for a whole day and night, it was spray-inoculated with a spore suspension of downy mildew. On the 5th day after inoculation, the number of lesions on the first leaf was examined, and the severity of disease in the untreated area was 1
The degree of illness of each treatment group was obtained as a percentage, with the number of illnesses as 00 and no disease as 0, and the results in Table 4 were obtained.

[0027]

[Table 17]

Test Example 4. Cucumber gray mold prevention test Cucumber (variety: four leaves) is cultivated in a biscuit pot with a diameter of 9 cm, and when reaching the 1-leaf stage, a spray gun of 10 ml of an aqueous dispersion containing each of the predetermined concentrations of the test compounds X and Y is spray gun. Was sprayed. After leaving it in a greenhouse at 24 to 25 ° C. for a whole day and night, a disc of Botrytis cinerea, which had been previously cultivated in agarose and glucose agar medium (PDA medium), was placed on the leaves and inoculated. On the 3rd day after inoculation, the lesion 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. The results shown in Table 5-5 were obtained.

[0029]

[Table 18]

[0030]

[Table 19]

[0031]

[Table 20]

[0032]

[Table 21]

[0033]

[Table 22]

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, an excellent control effect can be obtained at a considerably lower concentration than expected from each single agent, and furthermore, it can be expected by application of each single agent. A wide range of effects can be seen against pathogens that did not exist.

The fungicide composition of the present invention is a cultivated crop infected with or susceptible to harmful pathogens, for example, vegetables such as cucumber, tomato and eggplant, cereals such as rice and wheat, and legumes. It exhibits an excellent bactericidal action when applied to fruit trees such as apples, pears, grapes and citrus fruits. For example, powdery mildew, rust, downy mildew, anthracnose, gray mold, scab and spots. Suitable for the control of leaf scab, red scab, blast, leaf spot, seedling blight, white silkworm, etc., but among them, control of powdery mildew, rust, downy mildew, gray mold and scab. Is perfect for.

The fungicide composition of the present invention can be used by diluting the above-mentioned active ingredient as it is into water and mixing it, as in the case of ordinary pesticides. It is also possible to formulate and apply it in the form of a Japanese medicine, granules and the like. Further, the above-mentioned active ingredients may be individually mixed and formulated with an auxiliary agent and then mixed.

As the auxiliary agent, a solid carrier such as diatomaceous earth, slaked lime, calcium carbonate, talc, white carbon, kaolin, bentonite and sieglite, toluene,
Xylene, solvent naphtha, ethanol, dioxane, acetone, isophorone, methyl isobutyl ketone,
Solvents such as dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, sodium alkyl sulfate, sodium alkylbenzene sulfonate, sodium lignin sulfonate, polyoxyethylene glycol alkyl ether, polyoxyethylene lauryl ether, polyoxyethylene alkylaryl ether , A spreading agent such as polyoxyethylene sorbitan fatty acid ester, and a surfactant.

The application concentration of the fungicide composition of the present invention varies depending on conditions such as the formulation of the drug, the time of application, the type of harmful bacterium, etc., and therefore cannot be specified unconditionally, but generally the N-pyridylaniline compound is 10,000 ppm, other bactericidal compounds, 1-10,000 ppm, preferably 10-1,000 ppm for the former, 10-1,000 for the latter
It is 0 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 25 25 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. The formula: N- which is an N-pyridylaniline compound represented by
(3-chloro-5-trifluoromethyl-2-pyridyl) -2,6-dinitro-3-chloro-4-trifluoromethylaniline and 3'-isopropoxy-O-toluanilide or α, α, α-tri An agricultural and horticultural fungicide composition containing fluoro-3'-isopropoxy-O-toluanilide as an active ingredient.