JPH10338604A - Composition for controlling disease damage of paddy rice plant and control used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition capable of efficiently controlling the damage of blast and extremely saving labor, by including an agrochemical component composed of a specific cyanoacetic acid amide-based plant disease damage controlling compound and a fertilizer component. SOLUTION: This composition comprises (A) an agrochemical composition composed of a cyanoacetic acid amide-based plant disease damage controlling compound of the formula (X is H, F, Cl or a lower alkoxy; Y is Cl, Br, trifluoromethyl or a lower fluoroalkoxy) e.g. (RS)-N-[(R)-1-(2,4-dichlorophenyl) ethyl]-2-cyano-3,3-dimethylbutanamide} and (B) a fertilizer component [e.g. NPK component type (N-P2 O5 -K2 O) fertilizer] preferably containing the whole fertilizer components of nitrogen, phosphorus and potassium. The component A can be used as it is or can be formulated with a carrier and optionally with an additive and prepared into an emulsion, wettable powder, granule, etc., and used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pesticide-containing fertilizer composition for controlling rice disease and a method for controlling rice disease using the same.

[0002]

BACKGROUND OF THE INVENTION Among rice diseases, blast (an blast which occurs on leaves is called leaf blast and a blast which occurs on ears is called ear blast) is an important disease to be controlled. can give. In particular, ear blast disease causes damage by infiltration of mycelia into paddy to be harvested, so that when the damage is remarkable, harvesting may not be performed at all. Germination of conidia of blast fungus and invasion and spread of mycelia of blast fungus progress rapidly under climatic conditions of 20 to 25 ° C and long-term rainfall. Conventionally, as a method for controlling blast, in Honda, a powder for blast control several times to 10
Sprinkle foliage or spray granules several times to 1
Water application treatment was performed 0 times.

[0003]

However, such a large number of chemical treatments are labor intensive for the farmers, and the chemical treatments have to be performed between rains under climatic conditions where rainfall continues for a long time. It must be performed, and it is difficult to perform timely treatment, and the control effect of the conventional method is not sufficient.

[0004]

Under these circumstances, the present inventors have conducted intensive studies, and as a result, obtained an agricultural chemical-containing fertilizer composition containing a plant disease controlling compound having a specific chemical structure. By applying lateral stripes to paddy fields at the time of transplanting or sowing paddy, it is possible to efficiently control blast damage, which is a problem, throughout the rice cultivation period, and thus to save a great deal of labor in controlling rice disease. And found that a more reliable control effect can be obtained, leading to the present invention. That is, the present invention provides a pesticide-containing fertilizer composition for controlling rice disease, which comprises a cyanoacetamide-based plant disease control compound as a pesticide component and a fertilizer (hereinafter, referred to as the present composition). The present invention also provides a method for controlling rice plant diseases by applying the present composition to a paddy field at the time of transplanting seedlings or seeding of paddy (hereinafter referred to as the method of the present invention).

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The fertilizer contained in the composition of the present invention refers to various fertilizer components such as nitrogen, phosphorus, potassium, silicon, magnesium, calcium, manganese, boron, iron, and other various elements required by paddy rice. Which contains
Specific examples include urea, ammonium nitrate, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate, ammonium nitrate, sodium nitrate, calcium nitrate, potassium nitrate, lime nitrogen, formaldehyde processed urea fertilizer (UF), acetaldehyde processed urea fertilizer (CDU) ), Nitrogenous fertilizers such as isobutyraldehyde-processed urea fertilizer (IBDU) and guanyl urea (GU), lime superphosphate, heavy superphosphate, molten phosphorus fertilizer, humic acid phosphorus fertilizer, calcined phosphorus fertilizer, heavy-burning phosphorus , Magnesium superphosphate, Ammonium phosphate, Ammonium polyphosphate, Potassium metaphosphate, Calcium metaphosphate, Phosphate fertilizers such as Magnesium phosphoric acid, Phosphorus ammonium sulfate, Potassium phosphate nitrate, Phosphorus salt, Potassium chloride, Potassium sulfate , Potassium sulfate, potassium sulfate, potassium bicarbonate Potassium fertilizers such as potassium phosphate; siliceous fertilizers such as calcium silicate; magnesium fertilizers such as magnesium sulfate and magnesium chloride; calcium lime fertilizers such as quicklime, slaked lime and calcium carbonate; manganese sulfate; manganese sulfate manganese; And other fertilizers such as manganese fertilizers such as boric acid and borate, iron-containing fertilizers such as iron and steel slag, and the like. Among them, those containing at least one fertilizer component selected from nitrogen (N), phosphorus (P) and potassium (K), particularly those containing all three fertilizer components, are preferred. As a specific example, N
PK-component _{(N-P 2 O 5 -K} 2 O) include fertilizers, as such a fertilizer, for example, type 1 flat up type such 5-5-7,12-12-16, 5-5- 5, 14-14-14, 2 type horizontal type, 6-6-5, 8-
3 type flat type such as 8-5, 4 type upward type such as 4-7-9, 6-8-11, 5 type upward flat type such as 4-7-7, 10-20-20, 4-type 7-4, 6-9-6
6 type mountain type, 6-4-5, 14-10-13, etc. 7 type valley type, 6-5-5, etc.
8 type flat type such as 18-11-11, 9 type down type such as 7-6-5, 14-12-9, 10 type NP type such as 3-20-0, 18-35-0, 16 -0-1
2, 11-0 NK type such as 18-0-16, 1 such as 0-3-14, 0-15-15
And a type 2 PK type. The form of the fertilizer to be used may be any of a granular form, a powdery form, a massive form, and a liquid form, and various forms of fertilizer can be used. Further, the composition of the present invention can also be produced by using a fertilizer to which sustained release is imparted as a raw material. Here, as a method for imparting sustained release properties, for example, a method of adding phosphoric acid in the form of calcium phosphate, adding pitch, sulfur, resin, or the like, or a coating material (for example, resin such as polyolefin)
Is dissolved or dispersed in a solvent (for example, toluene),
The solution or dispersion may be coated on the surface of the fertilizer component and dried to remove the solvent to obtain a coated fertilizer. The weight ratio of the coating material to the coated fertilizer, that is, the coating ratio is, for example, about 2-3.
The range is 0% by weight. The composition of the present invention may contain a suitable auxiliary component in addition to the cyanoacetamide-based plant disease controlling compound as a pesticide component and a fertilizer. By adding an auxiliary such as a water-insoluble inorganic substance such as talc, pyroxene or silica as the auxiliary component, it is possible to prevent caking at the time of producing the composition of the present invention.

The cyanoacetamide-based plant disease controlling compound used in the present invention is represented by the following general formula:

Embedded image (In the formula, X represents a hydrogen atom, a fluorine atom, a chlorine atom or a lower alkoxy group, and Y represents a chlorine atom, a bromine atom, a trifluoromethyl group or a lower fluoroalkoxy group.) The compounds may be used alone or as a mixture of two or more. The compound has optical isomers derived from asymmetric carbon, and the compound in the present invention includes these isomers and mixtures thereof. The compound is represented by the general formula 2
Wherein X is a chlorine atom and Y is a chlorine atom, and one of its optical isomers (chemical name: (RS)-
N-[(R) -1- (2,4-dichlorophenyl) ethyl] -2-cyano-3,3-dimethylbutanamide (hereinafter referred to as compound A) is preferred. The cyanoacetamide-based plant disease controlling compound represented by the above general formula can be produced, for example, by the production method described in JP-A-2-76846.

[0007] The above-mentioned cyanoacetamide-based plant disease controlling compound can be used as it is for the production of the composition of the present invention without adding any other components. Also, it is mixed with various carriers such as a solid carrier and a liquid carrier, and if necessary, further added with a surfactant and other auxiliaries for formulation, if necessary, to prepare emulsions, wettable powders, suspensions in water, emulsions in water. The composition of the present invention can also be used in the preparation of the composition of the present invention after being formulated into an agent, granule, powder or the like.
In these preparations, the compound is usually used as an active ingredient.
0.001% to 95% by weight.

[0008] Examples of the solid carrier used in such a formulation include clays (kaolin clay, bentonite, fubasami clay, acid clay, etc.), talcs, diatomaceous earth, synthetic hydrous silicon oxide, ceramics, and other inorganic minerals (cellulose). Site, quartz, sulfur, activated carbon, hydrated silica, etc.)
Examples of the liquid carrier include water, alcohols (methanol, ethanol, etc.), ketones (acetone, methyl ethyl ketone, etc.), and aromatic hydrocarbons (benzene, toluene, xylene, etc.). Ethylbenzene, methylnaphthalene, etc.), aliphatic hydrocarbons (hexane, cyclohexane, kerosene, light oil, etc.), esters (ethyl acetate, butyl acetate, etc.), nitriles (acetonitrile, isobutyronitrile, etc.), ethers (diisopropyl) Ether, dioxane, etc.),
Acid amides (N, N-dimethylformamide, N, N-
Dimethylacetamide, etc.), halogenated hydrocarbons (dichloromethane, trichloroethane, carbon tetrachloride, etc.), dimethyl sulfoxide, vegetable oils such as soybean oil, cottonseed oil and the like.

Examples of the surfactant include alkyl sulfates, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and polyoxyethylenates thereof, polyethylene glycol ethers, polyhydric alcohol esters, sugar alcohols Derivatives and the like.

As auxiliary agents for preparations such as fixatives and dispersants, for example, casein, gelatin, polysaccharides (starch,
Gum arabic, cellulose derivatives, alginic acid, etc.), lignin derivatives, bentonite, saccharides, synthetic water-soluble polymers (polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acids, etc.), and the like. Isopropyl), BHT (2,
6-di-tert-butyl-4-methylphenol), BH
A (2-tert-butyl-4-methoxyphenol and 3-
a mixture with tert-butyl-4-methoxyphenol),
Vegetable oils, mineral oils, surfactants, fatty acids or esters thereof, and the like.

Formulations of flowables (suspension in water or emulsions in water) generally contain from 1 to 75% of the compound from 0.5 to 15%.
% Of a dispersing agent, 0.1 to 10% of a suspending aid (for example, a protective colloid or a compound imparting thixotropic properties),
Finely dispersed in water containing 10% of suitable adjuvants (eg antifoaming agents, rust inhibitors, stabilizers, spreading agents, penetration aids, antifreezing agents, antibacterial agents, fungicides, etc.) It is obtained by doing. It is also possible to use an oil in which the compound hardly dissolves in place of water and use it as a suspension in oil. As the protective colloid, for example, gelatin, casein, gums, cellulose ether, polyvinyl alcohol and the like are used. Examples of the compound imparting thixotropic properties include inorganic fine powder such as synthetic hydrous silicon oxide, bentonite, and aluminum magnesium silicate, and water-soluble polymers such as xanthan gum, sodium carboxymethyl cellulose, and polyacrylic acid.

The composition of the present invention containing the fertilizer and the cyanoacetamide-based plant disease controlling compound can be produced, for example, by the following method. 1. A granular or bulk fertilizer (about 50 to 99.9 parts by weight) is put into a mixer having no crushing element such as a planetary mixer, and an adhesive such as polyvinyl alcohol and polyvinyl acetate (about 0. 9% by weight) is added.
(1 to 5 parts by weight) during the mixing operation. After uniformly distributing the solution of the adhesive such as polyvinyl alcohol and polyvinyl acetate on the surface of the fertilizer,
Cyanoacetic acid amide-based plant disease controlling compound (containing about 1 to 50% by weight of active ingredient) formulated in powder form in the mixer.
After about 10 to 30 minutes have passed, the mixture is dried at about 50 to 150 ° C. while operating the mixer to obtain a granular or bulky composition of the present invention. 2. A solution prepared by dissolving a cyanoacetamide-based plant disease controlling compound (containing about 0.01 to 20% by weight of an active ingredient) in a solvent such as acetone or xylene is granulated using a fluid coating apparatus or a mixer having no pulverizing element. Alternatively, the composition of the present invention is obtained by coating or impregnating a lump of fertilizer, followed by air drying or heat drying at about 50 to 150 ° C. 3. After mixing a cyanoacetamide-based plant disease controlling compound or a wettable powder or a powder thereof (containing about 0.01 to 5% by weight of an active ingredient) with a powdered fertilizer, granulation using a dish-type granulator or the like. The composition of the present invention is obtained by granulating using a machine. 4. A cyanoacetamide-based plant disease control compound (containing about 1 to 75% by weight of an active ingredient) formulated in a suspension or emulsion in water and a liquid fertilizer are placed in a mixing tank equipped with a stirrer, and then mixed. To obtain the composition of the present invention. When the composition of the present invention is granular or massive, the particle size is preferably in the range of about 1 to 10 mm from the viewpoint of handling. In the composition of the present invention, the fertilizer content is usually 99.999 to about 75% by weight, preferably 99.999 to about 95% by weight, and the content of the cyanoacetamide-based plant disease controlling compound is effective. The amount of the component is usually about 25 to 0.001% by weight, preferably about 2 to 0.01% by weight.

[0013] By applying the composition of the present invention thus produced to a paddy field at the time of transplanting seedlings or seeding of paddy, damage to blast can be controlled over the entire rice cultivation period. Compared with, it is possible to greatly reduce labor, achieve a more reliable control effect, and also exert a fertilizing effect.

The composition of the present invention is applied to a paddy field at the time of transplanting a seedling or at the time of sowing of paddy. The term "side application" as used herein is a method similar to a fertilization method generally called "side application", and the composition of the present invention is applied as a side application to a lower layer of soil. As an example, a line that is obtained by connecting the roots of rice seedlings that are transplanted in a row and the roots of the seedlings or the seeds that are sown in a row and the paddy is approximately parallel to each other, and about 2 lines in the horizontal direction from the line. ~ 1
A method of applying the composition of the present invention to a paddy soil 3-15 cm deep on a line 5 cm away can be shown. The application rate and application concentration of the composition of the present invention may vary depending on weather conditions and the like,
Usually, the application rate of the composition of the present invention is about 1 to 20000 g / a, preferably about 10 to 200 g / a in terms of the amount of fertilizer.
0 g / a, about 0.1 to 100 g / a, preferably about 0.5 to 10 g / a, based on the amount of the cyanoacetamide amide-based plant disease controlling compound as an active ingredient. Further, the composition of the present invention may be mixed with one or more kinds of other plant disease control agents, insecticides, acaricides, nematicides, herbicides, plant growth regulators, fertilizers and soil conditioners, if necessary. It can be applied at the same time or at the same time.

[0015]

EXAMPLES The present invention will be described in more detail with reference to production examples and test examples, but the present invention is not limited to these examples. Production Example 1 granular fertilizer (manufactured by Sumitomo Chemical Co., _{Ltd., N-P 2 O 5 -K} 2
O = 6% -20% -20%, particle size 1.4 mm to 2.6 m
m) 999.33 parts are placed in a mixer without grinding elements,
A particulate fertilizer is impregnated with 50 parts of an acetone solution containing 0.67 part of the compound A while rotating the mixer, and then the acetone is removed by air drying to obtain a pesticide-containing fertilizer composition (amount of the pesticide active ingredient: 0.1%). 067% by weight).

Test Example 1 75 parts of the pesticide-containing fertilizer composition prepared in Production Example 1 and 25 parts of urea coated with urethane resin (Sumitomo Chemical Co., Ltd .: N content 40%, particle size 1.4 to 2.6 mm) When rice seedlings (variety: Nipponbare) are transplanted to Honda, the rice plant is 3 cm wide and 5 cm deep using a side-row fertilizer planting machine.
The mixture is equivalent to 6 kg / a (3 g / a as an active ingredient of agrochemicals, 840 g / a as an N component, 840 g / a as a P component, and 840 g / a as a K component) in a paddy soil of cm. Was processed. In addition, resin-coated urea is 25 ° C.
Elute 80% of the nitrogen component in water for 20 days, 1
A mixture of 00 days and 140 days at a ratio of 20 parts: 40 parts: 40 parts was used. In the control plot, 75 parts of the above pesticide-containing fertilizer composition and urethane resin-coated urea 25
6 kg of a mixture of 75 parts of a pesticide-free fertilizer composition and 25 parts of urethane resin-coated urea instead of the mixture of
/ A (840 g / a as N component amount, 8 as P component amount)
40 g / a, equivalent to 840 g / a) as the K component amount was applied in the same manner as described above. Rice seedlings infected with blast were placed in the test plots on the 23rd and 79th days after transplantation, and were used as the source of infection for leaf blast and panicle blast, respectively. On the 48th day after the transplantation, the incidence of leaf blast was examined for 100 strains in the test plot, and on the 97th day after the transplantation, the incidence of panicle blast was examined. For leaf blast, no index: 0 No more than 10% of leaf area is affected: 1 to 25% of leaf area is affected: 2 26 to 50% of leaf area is affected: 4 51 to 100% of leaf area Was diseased: 8, and the total value obtained by multiplying this by the disease rate was defined as the disease severity. Here, the disease rate is expressed by the formula disease rate = 100 × (number of strains corresponding to each disease index / (8 ×
This is a value calculated by For panicle blast, no index: 0 Less than 1/3 of panicle: 1/3 to 2/3 of panicle: 2/3 or more of panicle: 3 Onset of neck blast: 4 The total value obtained by multiplying this by the disease rate was defined as the disease severity. In this case, the disease rate is given by the formula disease rate = 100 × (number of strains corresponding to each disease index / (4 ×
This is a value calculated by The test was performed in a test section of 163 m ² . Table 1 shows the results. As is clear from Table 1, in the group treated with the composition of the present invention, remarkable inhibition was observed in both leaf blast and panicle blast as compared with the control group.

[Table 1]

[0017]

Effect of the Invention By applying the composition of the present invention to a paddy field at the time of transplanting a seedling or sowing paddy, blast damage can be controlled over the entire rice cultivation period. It is possible to greatly reduce labor, achieve a more reliable control effect, and also exert a fertilizing effect.

Claims (5)

[Claims] [Claim 1] A general formula 1 as an agricultural chemical component (In the formula, X represents a hydrogen atom, a fluorine atom, a chlorine atom or a lower alkoxy group, and Y represents a chlorine atom, a bromine atom, a trifluoromethyl group or a lower fluoroalkoxy group.) An agricultural chemical-containing fertilizer composition for controlling rice disease, comprising a disease control compound and a fertilizer component. 2. The cyanoacetamide-based plant disease controlling compound according to claim 1, wherein in Formula 1, X is a chlorine atom and Y is a chlorine atom. Pesticide-containing fertilizer composition. 3. The pesticide-containing fertilizer composition according to claim 1, wherein the rice disease is blast. 4. A method for controlling rice plant diseases, comprising applying the fertilizer composition containing a pesticide for controlling rice plant diseases according to claim 1 or 2 to a paddy field at the time of transplanting seedlings or sowing rice seeds. 5. The control method according to claim 4, wherein the rice disease is blast.