JP2509604B2 - Composition for agricultural sterilization and plant growth control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition for agricultural sterilization and plant growth control,
More specifically, the rice blast control composition (3-
Allyloxy-1,2-benzisothiazole-1,1-dioxide, general name: probenazole) and rice lodging prevention composition (4'-chloro-2 '-(α-hydroxybenzyl) isonicotinic acid anilide, general name: The present invention relates to a composition for sterilization and plant growth regulation, which is mixed with Inabenfide.

In recent years, when cultivating area of rice, the cultivation of varieties with excellent taste such as Koshihikari and Sasanishiki has been rapidly increasing.
However, since these varieties are remarkably resistant to disease and have long culm or middle culm varieties, they have a drawback that they are likely to be lodged before harvesting, which requires an extremely high technique for cultivation.

The present inventors have been researching for several years the development of a drug capable of controlling blast disease, which is particularly susceptible to the above rice varieties, and preventing lodging.However, the blast disease controlling agent probenazole and the lodging inhibitor inabenfide were mixed. By doing
It was found that the blast disease can be completely controlled and the lodging prevention effect is sufficiently exhibited. The present invention is a mixture of the rice blast control agent probenazole and rice lodging alleviation agent inabenfide, which significantly enhances the rice blast control action of probenazole, and the rice tiller suppressive action of probenazole. It is characterized by being released by inabenfide, and finally it can completely control blast disease, and also exerts a lodging-preventing effect and increases the yield. As a method of use, first, by blending the fungicide probenazole according to the present invention and the plant growth regulator inabenfide, a wettable powder,
Agricultural chemicals such as granules and powders can be treated in a nursery box at the seedling stage of rice to promote healthy rice seedlings and control blast disease. In addition, by treating rice seedlings transplanted to Honda, it is possible to control leaf blast, and further, lodging can be prevented by increasing the number of rice stalks and shortening the plant height. In other words, it is appropriate to apply it at the time of application in Honda after transplanting rice to the heading stage of rice, which can control leaf blast and panicle blast, and increase the number of tillers and short culm of rice seedlings. The action is remarkably exhibited, and lodging can be prevented with an increase in yield.

In actually using the mixed compound of the present invention, it is possible to use it as it is without adding other components,
For more convenient use, a wettable powder, granules or powder can be produced by mixing with various solid or liquid carriers used for the preparation of general agricultural chemicals. Further, an auxiliary agent such as a dispersant, a diluent, an emulsifier, a spreading agent, a wetting agent, an adsorbent, a thickener, an antifoaming agent and an antifreezing agent can be added to the medicine.

The carrier here may be solid or liquid,
Also, a combination of these may be used. To list these examples, talc, clay, bentonite, kaolin, diatomaceous earth, calcium carbonate, wood flour, starch, gum arabic, water,
Examples thereof include alcohol, kerosene, naphtha, xylene, cyclohexanone, methylnaphthalene, benzene, acetone, dimethylformamide, glycol ether and N-methylpyrrolidone.

Examples of the auxiliary agent include polyoxyethylene alkylphenyl ether, polyoxyethylene sorbitan monooleate, ethylene oxide propylene oxide copolymer, lignin sulfonate, merbitan ester,
Soaps, sulfated oils, alkyl sulfate salts, petroleum sulfonates, dioctyl sulfosuccinate salts, alkylbenzene sulfonates, aliphatic amine salts, quaternary ammonium salts, alkylpyridinium salts, alkylaminoethylglycines, alkyldimethyls Examples include betaine, polyglycol sulfate, alkylamine sulfonic acid, isopropyl phosphate, carboxymethyl cellulose, polyvinyl alcohol, hydroxypropyl cellulose, ethylene glycol, xanthan gum and the like.

Upon formulation, the mixing ratio is generally 1 to 95% by weight of the compound of the present invention probenazole and inabenfide.
%, Preferably 1 to 80%, particularly preferably 5 to 60%, optimally 70 to 99% as carrier and 0 to 20% as auxiliary agent. Further, a wider range of effects can be expected by using it in combination with other fungicides, plant growth regulators, pesticides such as insecticides and fertilizers.

When actually using the mixed compound probenazole and inabenfide of the present invention, it is natural that they are appropriately selected depending on the time of use, weather conditions, method of use, dosage form, place of use, target disease, target crop, etc. The concentration is generally 100 to 150 ppm, preferably 100 to 1000 ppm, and the dose used (as the compound of the present invention probenazole or inabenfide) is generally 50 to 1000 per 10 ares.
g, preferably 100-600 g per 10 ares.

Next, the present invention will be described more specifically by showing examples. All "parts" in these examples are expressed in parts by weight.

Next, the usefulness of the compound of the present invention as a sterilizer for agricultural chemicals and a plant growth regulator will be described with reference to sample examples.

Example 1 Granules Probenazole 8 parts Inabenfide 6 parts Calcium lignin sulfonate 2 parts Bentonite 30 parts Talc 54 parts The above ingredients are mixed, water is added and the mixture is kneaded, then granulated and dried to obtain granules.

Example 2 Granules Probenazole 6 parts Inabenfide 5 parts Calcium lignin sulfonate 2 parts Bentonite 30 parts Talc 57 parts The above components are mixed, water is added and the mixture is kneaded, then granulated and dried to obtain granules.

Example 3 Wettable powder Probenazole 10 parts Inabenfide 50 parts Sodium alkyl sulfonate 5 parts Clay 35 parts The above are mixed and finely pulverized to obtain a wettable powder.

Example 4 Wettable powder Probenazole 8 parts Inabenfide 30 parts Sodium alkyl sulfonate 5 parts Clay 57 parts The above components are mixed and finely pulverized to obtain a wettable powder.

Test Example 1 I. Test method (1) Rice seedlings: Koshiji early seedling test seedling raising box (30 × 60
X 3 cm) was grown to the 3 leaf stage.

(2) Chemical treatment: The wettable powders prepared in Examples 3 and 4 were tested and sprayed on the soil surface of the nursery box on the day before transplantation.

(3) Rice cultivation and leaf blast control effect test: 1 day after the chemical treatment, the rice was transplanted to a 1/5000 g Wagner pot,
It was cultivated in a greenhouse. 21 or 31 days after the transplantation, a conidial fluid of Pyricularia oryzae N-1 was spray-inoculated, and 10 days later, the control effect was tested.

II. Test Results As shown in Table 1, the pesticide mixed preparation according to the present invention exhibited a sufficient effect only by applying it once to the nursery box. In addition, it was confirmed that the blast control effect continues 31 days after transplantation.

The above control value was calculated by the following formula. (same as below) Test Example 2 I. Test method (1) Rice seedlings: Koshiji early life test seedling raising box (30 × 60
X 3 cm) was grown to the 3 leaf stage.

(2) Drug treatment: The granules prepared in Examples 1 and 2 were dispersed in paddy fields 11 days after rice transplantation.

(3) Blast control effect test: 10 days after the chemical treatment, leaf blast was naturally infected, and 50 days after the chemical treatment, the disease was investigated and the control value was tested.

II. Test Results Table 2 As is clear from the results shown in Table 2, the pesticide mixed preparation according to the present invention showed a remarkably high control effect against leaf blast by treating the transplanted paddy only once.

Test Example 3 I. Test method (1) Rice seedlings: Koshiji early life was tested and seedling boxes (30 x
(60 × 3 cm), and then grown in a greenhouse until the 3-leaf stage.

(2) Drug treatment: The granules produced according to Examples 1 and 2 were granulated 11 days after rice transplantation.

(3) Increase in tiller stalk number and measurement of plant height of rice: 50 days after the drug treatment, increase and decrease of stalk number and plant height of rice were investigated. The yield was investigated 4 months after transplantation.

II. Test Results As is clear from the results shown in Table 3, the pesticide mixture preparation according to the present invention suppresses the plant height of rice, increases the number of stems, and increases the yield even if it is applied to Honda only once. Was approved.

The above untreated area ratio was calculated by the following formula.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Aoki 1-21-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Chugai Pharmaceutical Co., Ltd. Agricultural Chemicals Division (56) Reference JP-A-58-52206 (JP, A) JP-A-58-164501 (JP, A)

Claims (1)

(57) [Claims] 1. Allyloxy-1,2-benzisothiazole-1,1-dioxide and 4'-chloro-2'-
A composition for agricultural sterilization and plant growth control, which comprises (α-hydroxybenzyl) isonicotinic acid anilide as an active ingredient.