JPH05320005A - Agricultural and horticultural fungicidal composition - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides an economical agricultural / horticultural bactericidal composition having a synergistic effect, a highly safe environment, and a reduced amount of a dropping drug, which is produced by a mixed preparation of two or more active ingredients. The purpose is to [Structure] The bactericidal composition of the present invention contains tetrachloroisophthalonitrile and one or more ergosterol biosynthesis inhibitors as active ingredients in the range of 10: 1 to 100: 1, and its solid component Is a flowable preparation, a granule wettable powder or a hydratable tablet having a particle size distribution of 1 μm to 3 μm when dispersed in water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural / horticultural bactericidal composition, and more particularly to an agricultural / horticultural bactericidal composition having an improved plant disease control effect.

[0002]

2. Description of the Related Art A bactericide containing tetrachloroisophthalonitrile (hereinafter referred to as TPN) as an active ingredient has been put to practical use as a drug having a strong protective bactericidal action. In particular, it is widely used as an agricultural and horticultural fungicide by spraying it on plants or admixing it with soil for the purpose of disease control of fruit trees and vegetables, has a broad bactericidal spectrum and is extremely unlikely to develop resistant bacteria. In order to broaden the bactericidal spectrum and enable simultaneous control, a mixed bactericidal agent of TPN and other bactericidal active compounds, for example, methyl 3- (butylcarbamoyl) -3H-benzimidazol-2-ylcarbamate (generic name Benomyl) and mixed germicides are used.

On the other hand, an ergosterol biosynthesis inhibitor (hereinafter referred to as EBI) is particularly effective in controlling rust and powdery mildew that cause great damage to fruit trees and vegetables, and because it permeates into plants. It is known that it not only has a preventive effect, but also acts on pathogenic bacteria that have invaded into the tissues of plants and can prevent the spread of disease.

[0004]

A bactericide containing TPN as an active ingredient has a prophylactic effect as the center, and a therapeutic effect cannot be expected. In addition, EBI has a control effect only on filamentous fungi containing ergosterol as a constituent component in the cell wall, does not show efficacy against other pathogenic filamentous fungi, and is capable of generating drug-resistant bacteria by continuous spraying. Since it has high property, it has a big drawback that the number of times of use is limited.

Although some wettable powders prepared by mixing TPN with other bactericides are known, since the particle size is generally 5 μm or more, a synergistic effect cannot be expected and each of the drawbacks can be solved. Not in.

[0006] It is expected that reducing the amount of the dropped drug by efficiently using the active ingredient will provide a safer drug for the environment and an economical drug. Generally, two or more kinds of bactericidal active ingredients are mixed and used, and when they show an additive effect and a synergistic effect, it leads to reduction of the amount of the drug to be dropped, and an excellent bactericidal composition having the effectiveness of both drugs. Become.

It is an object of the present invention to provide a sterilizing composition for agricultural and horticultural use, which is capable of overcoming the drawbacks of each drug by mixing two or more kinds thereof and having a low dose and excellent properties.

[0008]

Means for Solving the Problems The present inventor has conducted extensive studies to solve the above problems, and as a result, TPN and EBI have been obtained.
And a sterilizing composition for agricultural and horticultural use, each of which has a particle size of 1 μm to 3 μm when dispersed in water, and is a flowable preparation, a wettable granule or a hydratable tablet. It has been found that the present invention has excellent characteristics, has a surprisingly strong synergistic effect, and has significantly improved safety for users, and thus completed the present invention.

The method for producing the fungicide composition of the present invention is not particularly limited. It can be manufactured by a commonly used apparatus with a conventionally used apparatus. For example, in the case of producing a flowable formulation, it can be easily produced by using a conventionally used pulverizer and incorporating a surfactant and the like. These mills include ball meal, impact mills,
A jet crusher, a wet crusher, etc. can be mentioned.

If desired, the flowable preparation may contain antifreeze agents, suspension stabilizers, decomposition inhibitors, coloring agents, odorants, bittering agents and the like.

In the case of producing a wettable granule or a hydratable tablet, it can be produced by a conventional compounding using a conventionally used pulverizer and granulator. Examples of these crushers include ball meal, impact crushers, jet crushers, and wet crushers.

As the granulator, an extrusion granulator, a dish granulator, a spray dryer, a fluidized bed granulator, a rolling granulator,
Examples include roller compactors and tabletting machines.

If necessary, a disintegration aid, a decomposition inhibitor, a coloring agent, an odorant, a bittering agent and the like can be added to the wettable granules and the wettable tablets.

The contents of TPN and EBI in the composition of the present invention are not particularly limited, but are 1% to 98%.
It can be used to some extent.

The content ratio of TPN and EBI is TPN and E
BI agent is in the range of 4: 1 to 100: 1.

[0016]

[Examples] Next, formulation examples of the composition of the present invention will be described, but it goes without saying that the present invention is not limited thereto.

Example 1 TPN, triflumizole, POE nonyl phenyl ether, sodium lignin sulfonate and calcined diatomaceous earth are mixed to form a powder having an average particle size of 3 μm using a jet crusher, and CMC-dissolved water is sprayed to form a dish After granulating with a machine, it was dried to produce a granular wettable powder.

The method for producing the two-component mixture of TPN and triadimefone, procrawlers and bitertanol is also in accordance with Example 1.

[0019]

In the case of the two-agent mixture of TPN and EBI, the bactericidal spectrum is broadened, and both the preventive effect and the therapeutic effect are combined, and it is effective against resistant bacteria.

The composition of the present invention has a particle size of 1 μm to 3 μm.
When the particle size is set to μm, dispersibility is significantly improved as compared with conventional wettable powders, and the drug is evenly distributed on the leaf surface, so that the efficacy is significantly improved, and a synergistic effect is observed.

Further, since the composition of the present invention is a flowable agent, a wettable granule or a wettable tablet, the following is considered. Since the flowable agent has already been dispersed in the liquid, aggregation in diluted water does not easily occur, the optimized particle size can be maintained as it is, and it is not necessary to add another solid substance as a diluent, so the decomposition action by the solid substance Can be avoided.
Due to these, the active ingredient acts remarkably efficiently,
The control effect is improved. When it is actually used, it has excellent dispersibility in water, so it is easily mixed with water and the preparation of the spray liquid is easy. Since the suspending property is also excellent, the drug solution after preparation can be kept in a uniform suspended state for a long time and can be sprayed at a predetermined concentration from the start to the end of spraying. The clogging at the time of spraying does not become a problem.

Granular wettable powders or wettable tablets have little dusting, are highly safe for users, can be prepared in a large volume, and are easy to measure. Little adhesion to the container.

[0023]

The composition of the present invention is effective for controlling diseases of a wide range of agricultural and horticultural crops, and the main ones are as follows. Paddy rice: Rice blast, sesame leaf blight, blight, scab seedling, seedling blight, etc. Wheat: Red rust, yellow rust, bare smut, leaf blight, brown snow rot, powdery mildew, etc. : Late blight, summer blight, black blight, etc. Soybeans: downy mildew, leaf spot, brown spot, sclerotium, rust, purpura etc. Red bean: brown spot, rust, soot spot, powdery mildew, etc. Peanut: brown spot, black spot, sclerotia, etc. Tobacco: red scab, epidemic, sclerot, hip fracture, maize, white scab, powdery mildew etc. Beat: downy mildew, brown spot, seedling Tomato: Gray mold, leaf mold, plague, sclerotial disease, ring spot disease, soot mold, wilt, seedling wilt etc. Eggplant: Gray mold, half body wilt, brown rot, Black spot,
Powdery mildew, scab, etc. Cucurbits: downy mildew, gray blight, gray mold, sclerotium, scab, anthracnose, vine blight, powdery mildew, seedling blight etc. Chinese cabbage: beet Disease, vitiligo disease, sclerotium, clubroot, etc. Onion: White plague, downy mildew, gray rot, anthracnose, etc. Lettuce: downy mildew, gray mold, brown spot, sclerotium, etc. Strawberry: Gray mold, powdery mildew, ring spot disease, etc. Chrysanthemum: White rust, powdery mildew, etc. Cyclamen: Gray mold, etc. Rose: Black scab, powdery mildew, etc. Citrus: Blue mold, Gray mold, Black spot, etc. Scab, etc. Apple: Scab, spotted leaf spot, scab, monili disease, powdery mildew, etc. Pear: Scab, black spot, scab, etc. Peach: Arabidopsis, scab, constriction, etc. Grape: Beet Mildew, gray mold, brown spot, black spot, late rot, rust, vine blight, vine split, powdery mildew, etc.

[Test Examples] Representative test examples will be shown below in order to specifically explain the effects of the composition of the present invention. However, it goes without saying that these are merely examples and the application examples of the present invention are not limited to these.

Test Example 1 Control test for barley powdery mildew The barley seedlings at the three-leaf stage were sprayed with a chemical solution diluted to a predetermined concentration, and after air-drying, barley powdery mildew (Erysiphe).
graminis f. sp. hordei) Conidia suspension was spray inoculated. This was kept in a greenhouse at 20 ° C., and after 7 days, the degree of disease was examined according to the following criteria.

[0026]

[Equation 1] n: Number of leaves according to degree of disease f: Index according to degree of disease N: Number of leaves under investigation Number of leaves according to degree of disease 0: Number of lesions 0 1: Number of lesions 1-5 2: Number of lesions 6-10 3: Number of lesions 11 ~ 20 4: Number of lesions 21 to 50 5: Number of lesions 51 or more

[0027]

[Equation 2]

Test Example 2 Apple Scab Disease Control Test Apple saplings at the 5th leaf stage were sprayed with a chemical solution diluted to a predetermined concentration, air-dried for one day, and then apple scab disease (Venturia).
inaequalis) conidia suspension was spray inoculated. This was kept in a humid chamber at 20 ° C. for 18 hours, and 14 days later, the degree of disease onset was investigated.

The calculation method of the disease severity and the control value was investigated according to the following criteria.

[0030]

[Equation 3] n: Number of leaves according to degree of disease f: Index according to degree of disease N: Number of leaves surveyed Index according to degree of disease 0: Area of disease 0% 1: Area of disease 1-5% 2: Area of disease 6-10% 3: Area of disease 11-11 25% 4: Disease area 26-100%

[0031]

[Equation 4]

Next, the test results are shown in the table. The results of Test Example 1 are shown in Table 1, and the results of Test Example 2 are shown in Table 2.

The calculation was performed according to the following formula:

[0034]

[Equation 5] In the formula, X = controlling value by the compound A when the active ingredient concentration is p. Y = Controlling value by the compound B when the active ingredient concentration is q. Estimated control value (theoretical value) by the compound A + B when E = p + q.

If the observed value is higher than the value E calculated by colby, this combination mixture has a synergistic effect.

[0036]

[Table 1]

[0037]

[Table 2]

From the above test results, it is shown that the composition of the present invention has excellent bactericidal efficacy and sufficient synergistic effect.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI technical display location (A01N 37/34 47:38) (72) Inventor Takashi Sakakibara 2-24 Tamagawa, Ota-ku, Tokyo No. 25 SDS Biotech Tokyo Research Institute (72) Inventor Tsukasa Watanabe 2-24-25 Tamagawa, Ota-ku, Tokyo SDS Biotech Tokyo Research Institute (72) Inventor Kaneko Toshihiko 2-24-25 Tamagawa, Ota-ku, Tokyo SDS Biotech Co., Ltd. Tokyo Research Center

Claims (2)

[Claims] 1. Tetrachloroisophthalonitrile and one or more ergosterol biosynthesis inhibitors are contained as active ingredients in a ratio range of 4: 1 to 100: 1, and the solid component has a particle size distribution of water. 1 μm to 3 when dispersed in
A germicidal composition for agricultural and horticultural use, which is in the range of μm and is a flowable formulation, a wettable granule or a wettable tablet. 2. The germicidal composition for agricultural and horticultural use according to claim 1, wherein the ergosterol biosynthesis inhibitor is triflumizole, triadimefone, procrawlers, and bittertanol.