JPH02160703A - Agricultural and horticultural germicidal composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition containing N-(3-chloro-5- trifluoromethyl-2-pyridyl)-2,6-dinitro-3-chloro-4-trifluoromethylaniline and a hydantoin derivative (trade name; Rovral(R)) as active ingredients. CONSTITUTION:The subject composition, containing (A) N-(3-chloro-5- trifluoromethyl-2-pyridyl)-2,6-dinitro-3-chloro-4-trifluoromethylaniline and (B) 3-(3,5-dichlorophenyl)-1-isopropylcarbamoylhydantoin as active ingredients and effective in controlling powdery mildew, downy mildew, gray mold, scab, etc., of cucumber, tomato, rice plant, bean, apple, citrus fruit, etc. The mixed use of the ingredients (A) and (B) provides the composition effective against powdery mildew, etc., on which effects have been insufficient and higher controlling activity is obtained with a smaller amount thereof used than those in single use thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fungicide composition for agricultural and horticultural use, and more particularly, N-(3-chloro-5-)+J7/lzolomethyl-2-pyridyl)-2,6-dinitro- 3-chloro-4-
Trifluoromethylaniline (hereinafter abbreviated as NPA) and 3
- (3,5-dichlorophenyl)-1-isopropylcarbamoylhydantoin as an active ingredient.

Many agricultural and horticultural fungicides have been provided for controlling harmful diseases occurring in crops, but improvements are still desired in various aspects.

The present inventors have previously discovered that NPA exhibits an excellent growth-inhibiting effect on pathogenic bacteria such as gray mold and scab, which are harmful to agriculture and horticulture. However, this compound has drawbacks such as not being sufficiently effective against specific pathogens such as powdery mildew, and its therapeutic effect against each pathogen being somewhat inferior to its preventive effect. As a result of research to solve these shortcomings, the inventors of the present invention found that by using NPA in combination with other specific fungicides, it is possible to sterilize pathogens that are not sufficiently effective, such as powdery mildew. It was also found that a synergistic effect can be obtained when used in combination, such as a high pesticidal activity that could not be expected when each was applied alone, and it was also possible to reduce the number of applications (■) compared to when applied alone.

It was also found that the practicality of the method is improved because a therapeutic effect can be obtained in addition to a preventive effect.

That is, the present invention is an agricultural and horticultural fungicide composition containing NPA and 3-(:3.5-dichlorophenyl)-1-isobrovir-rubamoylhydantoin as active ingredients.

Note that the above-mentioned 3-(3,5-dichlorophenyl)-1-
Isopropylcarbamoylhydantoin is known under the trade name "Lobral".

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

Test Example Cucumber Gray Mold Prevention Test Cultivate cucumbers (variety: four-leaf) in clay pots with a diameter of 9 CII, and when they reach the one-leaf stage, prepare a predetermined concentration of an aqueous dispersion of the test compound prepared according to the formulation example below. 1Qs+ffi was sprayed using a spray gun. After being left in a greenhouse at 24 to 25°C for a day and night, discs (agar punching) of cucumber gray mold fungus that had been cultured in advance on potato glucose agar (PDA medium) were placed on cucumber leaves and inoculated. After vaccination 3
On the second day, the diseased patch length of the first leaf was investigated, and the disease severity in each treated plot was determined as a percentage, with the disease severity in the untreated plot set as 100 and the disease-free score set as 0. The results are shown in the table below.
mJ indicates the concentration of the active ingredient.

As can be seen from the above test examples, the fungicide composition of the present invention provides superior bactericidal effects compared to the application of each single agent. In other words, by combining NPA with specific fungicides, superior control effects can be obtained at much lower concentrations than would be expected from each agent alone, and moreover, it is effective against pathogens that could not be expected with the application of each agent alone. There is also a wide range of effects (effects are recognized).

The fungicide composition of the present invention can be applied to cultivated crops that are infected or are at risk of being infected with harmful pathogens, such as cane vegetables such as cucumbers, tomatoes, and eggplants, grains such as rice and wheat, beans, apples, and pears. It exhibits an excellent bactericidal effect when applied to fruit trees such as grapes and citrus fruits, such as powdery mildew, downy mildew, tuberculosis, gray mold, scab, leaf spot, leaf spot, and rice blast. It is suitable for controlling diseases such as sheath blight, seedling damping off, and white silk disease, among others, it is most suitable for controlling powdery mildew, downy mildew, gray mold, and scab.

The fungicide composition of the present invention can be applied by diluting the active ingredient as it is in water and mixing it, as in the case of ordinary agricultural chemicals, but it can also be applied by blending it with various adjuvants, such as emulsions, hydrating powders, granules, etc. It can also be applied in the form of a preparation. Alternatively, the above-mentioned active ingredients may be individually blended and formulated with adjuvants, and then mixed.

The adjuvants include diatomaceous earth, slaked lime, calcium carbonate,
Solid carriers such as talc, white carbon, kaolin, bentonite, dicrite, toluene, xylene, solvent naphtha, ethanol, dioxane, acetone, isophorone, methyl isobutyl ketone, dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, etc. Spreading agents, interfaces such as tlJ, sodium alkyl sulfate, sodium alkylbenzenesulfonate, sodium lignin sulfonate, polyoxyethylene glycol alkyl ether, polyoxyethylene lauryl ether, polyoxyethylene alkylaryl ether, polyoxyethylene sorbitan fatty acid ester, etc. Examples include activators.

The application concentration of the fungicidal composition of the present invention cannot be unconditionally defined because it varies depending on conditions such as the formulation form of the drug, the time of application, and the type of harmful pathogens, but it can be determined that the concentration of NPA in -1G is 1 to 10.00.
0 ppm, 3-(3,5-dichlorophenyl)-
1-isopropylcarbamoylhydantoin is 1 to 10
．． 000 ppm, preferably the former is 10 to 1,000
ppm, the latter being 10 to 1.000 ppm.

Formulation Example 1 (1) NPA 25 parts by weight (2
) 25 parts by weight of 3-(3,5-dichlorophenyl)-1-isopropylcarbamoylhydantoin (3) 45 parts by weight of dicrite (4) 5 parts by weight or more of sodium ligninsulfonate are uniformly mixed to form a wettable powder. And so.

Formulation Example 2 (1) NPA (2) Ziecrite 78 parts by weight (3)
Carplex (manufactured by Geotsugi Pharmaceutical: trade name) 15 parts by weight (4) Labelin S (No. 1 pharmaceutical type: trade name) 2 parts by weight (5) Tsurupol 5039 (Toho Chemical type: trade name) 5 parts by weight (2)
The mixture of ~(5) and (1) were mixed in a ratio of 4:1 to make a hydrating agent.Next, this hydrating agent and Loblal Permanent Agent (manufactured by Rose-Boulin, trade name: active ingredient 50%) , dispersant, etc.) in a ratio of 1=1 to prepare a wettable powder.

Patent applicant: Ishihara Sangyo Co., Ltd.

Claims (1)

[Claims] N-(3-chloro-5-trifluoromethyl-2-pyridyl)-2,6-dinitro-3-chloro-4-trifluoromethylaniline and 3-(3,5-dichlorophenyl)-1-isopropylcarbamoylhydantoin An agricultural and horticultural fungicide composition containing as an active ingredient.