JPH05320007A - Agricultural and horticultural fungicide - Google Patents

Abstract

PURPOSE:To obtain an economic agricultural and horticultural fungicide composition having synergistic effects by a mixed agent of two or more active ingredients and high safety to an environment with a small amount of agent applied. CONSTITUTION:A fungicidal compound comprises tetrachloroisophthalonitrile (TPN) and iprodione in the ratio of 2:1-5:1, TPN and fenarimol in 10:1-50:1, TPN and fosetyl in 1:2-2:1 or TPN and cymoxanil in 1:1-10:1 and has a particle size distribution of solid component in a range of 1mum-3mum when dispersed into water to give a flowable agent, granular wettable powder or wettable tablet.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an agricultural and horticultural fungicide,
Particularly, the present invention relates to an agricultural / horticultural bactericidal composition having an improved disease control effect on plants.

[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 fungicides are used.

On the other hand, iprodione has not only a preventive effect but also a therapeutic effect against diseases of fruit trees and vegetables. Fenalimol is particularly effective in controlling rust, powdery mildew, and other diseases that cause great damage to fruit trees and vegetables.Because fenarimol penetrates into plants, it also acts on pathogenic bacteria that have invaded the tissues of plants, causing disease. Is known to be able to prevent the spread of. Fosetyl has excellent penetrability and migration, and is effective against downy mildew of vegetables. It has not only a preventive effect but also a therapeutic effect. Simoxanil has a preventive effect against the plague and downy mildew of fruit trees and vegetables. It is known that it also has a therapeutic effect.

[0004]

A bactericide containing TPN as an active ingredient is mainly for preventive effect, and no therapeutic effect can be expected at all. In addition, iprodione may cause drug-resistant bacteria, and its target diseases are limited. Phenarimol has a controlling effect only on filamentous fungi containing ergosterol as a constituent component in the cell wall, has no effect on other pathogenic filamentous fungi, and may cause drug-resistant fungi by continuous spraying. Since it is high, it has a big drawback that the number of times of use is limited. Fosetyl and cimoxanil are effective only against the plague and downy mildew, and the target diseases are limited.

Mixtures of TPN and wettable powders of each drug are known for some agents, but they have a particle size of 5μ.
Since it is m or more, a synergistic effect cannot be expected, and each defect has not been solved.

[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 fungicide for agricultural and horticultural use which has a low dose and excellent properties by overcoming the drawbacks of each drug by mixing two or more kinds.

[0008]

Means for Solving the Problems The present inventor has conducted extensive studies in the above circumstances and as a result, contains TPN and at least one selected from the group of iprodione, phenalimol, fosetyl and simoxanil as an active ingredient. , The particle size when dispersed in water is 1 μm to 3 μm,
Moreover, the agricultural and horticultural fungicides, which are flowable preparations, wettable powder granules, or wettable tablets, have their respective excellent characteristics, and have a surprisingly strong synergistic effect, and significantly improve the safety for users. As a result, they have completed the present invention.

The method for producing the fungicide composition of the present invention is not particularly limited. The device can be manufactured by a general method using a conventionally used device. 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 content of TPN and at least one active ingredient selected from iprodione, phenalimol, fosetyl and simoxanil in the composition of the present invention is not particularly limited, but it is used in the range of 1% to 98%. Is desirable.

The content ratio of TPN and other compounds is TP
N and iprodione are 2: 1 to 5: 1, TPN and phenalimol are 10: 1 to 50: 1, TPN and fosetyl are 1: 2 to 2: 1, and TPN and cimoxanil are 1: 1 to 10: 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 20 parts Iprodione 10 parts POE nonyl phenyl ether 2 parts Sodium lignin sulfonate 5 parts Water 63 parts After mixing the components in the above-mentioned mixing ratio, the mixture was crushed with a wet crusher while controlling the crushing time to obtain an average particle size. A flowable sample having a diameter of 2.0 μm was prepared.

Example 2 TPN 20 parts Phenarimol 1 part POE nonyl phenyl ether 2 parts Lignin sulfonic acid soda 5 parts Water 72 parts After mixing the components in the above-mentioned mixing ratio, the mixture was crushed with a wet crusher while controlling the crushing time to obtain an average particle size. A flowable sample having a diameter of 2.0 μm was prepared.

Example 3 TPN 10 parts Fosetyl 10 parts Sodium lignin sulfonate 30 parts Citric acid 10 parts Heavy soot 10 parts Crystalline cellulose 30 parts After mixing the components in the above mixing ratio, an average particle diameter of 2.0 μm was obtained with a jet pulverizer. The mixture was pulverized and granulated with a tableting machine to prepare a wettable tablet sample.

Example 4 TPN 20 parts Cimoxanil 10 parts POE nonyl phenyl ether 2 parts Sodium lignin sulfonate 5 parts Water 63 parts Mixing the respective components in the above mixing ratio, pulverizing them with a wet pulverizer while controlling the pulverizing time, and averaging the average particles. A flowable sample having a diameter of 2.0 μm was prepared.

[0021]

[Effect] In the case of a mixture of two or more of TPN and iprodione, phenalimol, fosetyl or cimoxanil, the bactericidal spectrum is broadened and both preventive and therapeutic effects are combined, and it is also effective against resistant bacteria. Have.

The present invention has a particle size of 1 μm to 3 μm.
By this, the dispersibility is significantly improved as compared with conventional wettable powders, and the drug is evenly distributed on the leaf surface, so the efficacy is also greatly 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 can be 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.
By these, the active ingredient can act extremely efficiently and 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 suspension is also excellent, the drug solution after preparation can maintain a uniform suspension state for a long time,
It 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.

Further, the granular wettable powder or wettable tablet has less powdering, is highly safe for users, can be prepared in a large volume, and is easy to measure the drug. Little adhesion to the container.

[0025]

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.

Rice: Rice blast, sesame leaf blight, leaf blight, scab seedling disease, seedling blight, etc. Wheat: Red rust, yellow rust, bare smut, leaf blight, brown snow rot, udon Diseases, etc. Potato: Late blight, summer blight, black spot, etc. Soybean: downy mildew, spot disease, brown spot, sclerotium, rust, purpura etc. Red bean: brown spot, rust, soot spot, udon Pimples: Peanut: brown spot, black spot, sclerotia, etc. Tobacco: red scab, plague, sclerotium, hip fracture, mai, white scab, powdery mildew etc. Beat: downy mildew, brown spot Diseases, seedling blight, etc. Tomato: Gray mold, leaf mold, plague, sclerotial disease, ring spot disease, soot mold, wilt, seedling blight, 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.

Typical 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 Cucumber Gray Mold Control Test A potted cucumber (variety: four leaves) was sprayed with a chemical solution diluted to a predetermined concentration at the three-leaf stage so as to adhere sufficiently to the leaf surface, and after 5 days, Botrytis cinerea. ) Was spray inoculated. Immediately after inoculation, temperature 2
It was kept under dark conditions in an inoculation room at 2 ° C and 100% humidity for 3 days, and the degree of disease was investigated according to the following criteria.

[0029]

[Equation 1] 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%

[0030]

[Equation 2]

Test Example 2 Control Test for Apple Leaf Spot Leaf Disease A developed apple apple seedling (cultivar: No. 1 in the world) is sprayed with a chemical solution diluted to a predetermined concentration so that it adheres sufficiently to the leaf surface, and after 5 days, precultured in an apricot medium. Apple spot foliar fungus (Alte
rnaria alterna apple pa
sprayed inoculation with a conidia suspension. This was kept in a 27 ° C. inoculation room for 2 days, further transferred into a greenhouse, and 2 days later, the degree of disease onset was investigated. The method for calculating the disease severity and the control value is in accordance with Test Example 1.

Test Example 3 Controlling apple scab disease: An apple sapling at the 5th leaf stage was sprayed with a chemical solution diluted to a predetermined concentration so as to sufficiently adhere to the leaf surface, and 5 days later, Venturia inaequalis conidia suspension. The suspension was spray inoculated. This was kept in a 20 ° C. inoculation room for 18 hours, and 14 days later, the degree of disease onset was investigated. The method for calculating the disease severity and the control value is in accordance with Test Example 1.

Test Example 4 Cucumber powdery mildew The chemical solution diluted to a predetermined concentration was sprayed on the cucumber at the 2nd leaf stage so as to adhere sufficiently to the leaf surface, and 5 days later, a suspension of conidia of the cucumber powdery mildew (Sphaerotheca fuliginea) was produced. Spray inoculated. 1 in a greenhouse at 20 ℃
After keeping it for 0 days, the degree of illness was investigated.

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

[0035]

[Equation 3] n: Number of leaves according to degree of disease f: Index according to degree of disease N: Number of investigated leaves Number of disease degree 0: Disease area 0% 1: Disease area 1 to 25% 3: Disease area 26 to 50% 5: Disease area 50 to 100 %

[0036]

[Equation 4]

Test Example 5 Control test for cucumber downy mildew A chemical solution diluted to a predetermined concentration was sprayed on a cucumber at the 2nd leaf stage (cultivar: Tokiwako No. 3 P type) so as to sufficiently adhere to the leaf surface, and then 5
After a while, cucumber downy mildew (Pseudoperonos)
Pora cubensis) was spray inoculated with a zoospore suspension. This was kept in the inoculation room at 21 ° C. for 2 days and then left in the greenhouse for 2 days. Five days after the inoculation, the lesion areas of the first and second true leaves were examined according to the following criteria. The method for calculating the disease severity and the control value is in accordance with Test Example 1.

Test Example 6 Control Test for Potato Plague Disease Potato blight (Phytophthora i) was sprayed on potted potatoes (cultivar: Danshak) so that the drug solution diluted to a predetermined concentration was sufficiently adhered to the leaf surface.
nfestans) was spray inoculated with a zoospore suspension. After leaving this in an inoculation room at 21 ° C. for 2 days, the degree of disease onset was investigated. The method for calculating the disease severity and the control value is in accordance with Test Example 1.

[Equation 5]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical display location A01N 57:04) (72) Inventor Takashi Sakakibara 2-24-25 Tamagawa, Ota-ku, Tokyo Stock company SDS Biotech Tokyo Research Institute (72) Inventor Tsukasa Watanabe 2-24-25 Tamagawa Ota-ku, Tokyo SDS Biotech Tokyo Research Institute (72) Inventor Toshihiko Kaneko Ota Tokyo 2-24-25 Tamagawa, Tokyo SDS Biotech Tokyo Research Institute

Claims (5)

[Claims] 1. Tetrachloroisophthalonitrile and at least one selected from the group of iprodione, phenalimol, fosetyl and simoxanil as an active ingredient, and the particle size distribution of the solid component when dispersed in water. ,
A range of 1 μm to 3 μm and a flowable formulation,
Agro-horticultural fungicide which is a wettable granule or a wettable tablet. 2. Tetrachloroisophthalonitrile and iprodione are contained as active ingredients in a ratio of 2: 1 to 5: 1, and the solid component has a particle size distribution of 1 when dispersed in water.
A fungicide for agricultural and horticultural use, which is in the range of μm to 3 μm and is a flowable preparation, a wettable granule or a wettable tablet. 3. Tetrachloroisophthalonitrile and phenalimol are contained as active ingredients in a ratio of 10: 1 to 50: 1, and the particle size distribution of the solid component is in the range of 1 μm to 3 μm when dispersed in water. , And a fungicide for agricultural and horticultural use which is a flowable formulation, a wettable granule or a wettable tablet. 4. Tetrachloroisophthalonitrile and fosetyl are contained as active ingredients in a ratio of 1: 2 to 2: 1, and the solid component has a particle size distribution of 1 μm when dispersed in water.
A fungicide for agricultural and horticultural use, which is in the range of m to 3 μm and is a flowable preparation, a wettable granule or a wettable tablet. 5. Tetrachloroisophthalonitrile and cimoxanil are contained as active ingredients in a ratio of 1: 1 to 10: 1, and when the particle size distribution of the solid component is dispersed in water,
A range of 1 μm to 3 μm and a flowable formulation,
Agro-horticultural fungicide which is a wettable granule or a wettable tablet.