JP2003095806A - Granular agrochemical composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice blast-controlling agent having both of rapid effect in treatment and long-term residual activity and capable of exhibiting high controlling effect for a long period from immediately after treatment with the controlling agent. SOLUTION: This granular agrochemical composition comprises (a) 0.5-20 wt.% rice blast controlling active component, (b) 3-10 wt.% bentonite, (c) 1-3 wt.% nonionic surfactant, (d) 2-4 wt.% nonionic water-soluble polymer and (e) 63-93.5 wt.% mineral-based carrier. This method for controlling the rice blast is also provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a granular pesticide composition.

[0002]

BACKGROUND OF THE INVENTION Rice blast has a combination of immediate effect and long-term residual effect at the time of treatment with a control agent because the occurrence of the disease is long from the seedling raising period to the heading period. Development of a rice blast control agent capable of exhibiting a high control effect for a long period of time immediately after treatment with the control agent is required.

[0003]

[Means for Solving the Problems] In view of such a situation,
As a result of intensive studies on the rice blast control agent, the present inventors have found that a granular composition containing a rice blast control active ingredient, bentonite, a nonionic surfactant, a nonionic water-soluble polymer and a mineral carrier in a specific range. The inventors have found that the composition exhibits a high control effect for a long period of time from immediately after the treatment to the residual effect, and completed the present invention. That is, the present invention comprises: a) 0.5 to 20% by weight of rice blast control active ingredient; b) 3 to 10% by weight of bentonite; c) 1
~ 3 wt% nonionic surfactant, d) 2-4 wt%
A nonionic water-soluble polymer and e) 63 to 93.5% by weight of a mineral carrier, and a granular pesticide composition (hereinafter referred to as the present composition) and the present composition. The present invention relates to a method for controlling rice blast, which is characterized by being treated in a nursery box.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The rice blast controlling active ingredient used in the present invention preferably has a water solubility of 100 mg / l or less at 25 ° C., and specific examples thereof include 2-cyano-N- (1- ( 2,4-dichlorophenyl) ethyl) -3,3-dimethylbutyramide, 2,2-
Dichloro-N- (1- (4-chlorophenyl) ethyl)
-1-Ethyl-3-methylcyclopropanecarboxamide, 1,2,3-benzothiadiazole-7-carbaothioic acid S-methyl ester, diisopropyl-1,
3-dithiolane-2-ylidene-malonate, methyl =
(E) -2- [2- {6- (2-cyanophenoxy) pyrimidin-4-yloxy} phenyl] -3-methoxy acrylate and the like can be mentioned, and these compounds have optical isomerism, geometric isomerism and the like. When it contains a plurality of isomers based on it, it may be an isomer having rice blast control activity alone or a mixture of two or more isomers including the isomer having the control activity.

Preferably, 2-cyano-N- (1-
(2,4-Dichlorophenyl) ethyl) -3,3-dimethylbutyramide and 2,2-dichloro-N- (1- (4
-Chlorophenyl) ethyl) -1-ethyl-3-methylcyclopropanecarboxamide may be mentioned.

The rice blast controlling active ingredient may be contained in the composition in one kind or in two or more kinds. The content of the rice blast controlling active ingredient in the present composition is 0.5 to 20% by weight, preferably 0.5 to 10% by weight.

Bentonite contained in the present composition is a clay mineral containing montmorillonite crystals as a main component, and preferably has a swelling degree of 3 to 5 (g / g). The content of bentonite in the present composition is 3 to 10% by weight, preferably 7 to 10% by weight. In addition, in the present specification, the degree of swelling refers to the standard test method “JBA of Japan Bentonite Industry Association”.
S-104-77 ".

As the bentonite, commercially available bentonite can be used. Specifically, for example, bentonite Hodaka, bentonite asama, bentonite Akagi, bentonite Fuji, bentonite Myogi, bentonite Haruna (Hojun), Kunigel V1 (Kunimine Industries Co., Ltd.) , Bent Farm (Bromhead & Denison Lt
d), Super Clay (Hojun) and the like. Particularly, when the degree of swelling is 3 to 5 (g / g), for example,
Bentonite Fuji and Bentonite Myogi are mentioned, and more preferably Bentonite Myogi (swelling degree, 3 to 4.5).
(G / g)). Examples of the nonionic surfactant in the present composition include polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene lanolin alcohol, polyoxyethylene alkylphenol formalin condensate, polyoxyethylene sorbitan fatty acid ester, and polyoxy. Ethylene glyceryl monofatty acid ester, polyoxypropylene glycol monofatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene castor oil derivative, polyoxyethylene fatty acid ester, higher fatty acid glycerin ester, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxy Ethylene polyoxypropylene block polymer, polyoxyethylene fatty acid amide, alkylol amide Polyoxyethylene alkyl amines, and the like. Among them, polyoxyethylene alkylaryl ethers such as polyoxyethylene styryl phenyl ether, polyoxyethylene distyryl phenyl ether, and polyoxyethylene tristyryl phenyl ether are preferably used. The content of the nonionic surfactant in the composition is
It is 1 to 3% by weight.

Examples of the nonionic water-soluble polymer in the present invention include polyvinyl alcohol, polyvinylpyrrolidone, vinyl acetate copolymer, polyacrylamide,
Vinyl-based polymers such as polyhydroxyethyl methacrylate can be mentioned, and polyvinyl alcohol is preferable. Among them, polyvinyl alcohol having a viscosity of 40 to 60 mPa · s at 20 ° C. in a 10% aqueous solution is particularly preferably used, and commercially available polyvinyl alcohol can be used. Examples of the commercially available product include Gohsenol GL-05S manufactured by Nippon Synthetic Chemical Industry, and Kuraray PVA217S manufactured by Kuraray.

The content of the nonionic water-soluble polymer in the composition is 2 to 4% by weight, preferably 2 to 3% by weight.

Examples of the mineral substance carrier in the present invention include kaolin minerals such as kaolinite, dickanite, nacrite and halosite, chrysotile, lizzite, anticolite, serpentine such as amethite, saponite, hectorite, sauconite, Smectites such as Hydelite, pyrophyllite, talc, sekiseki, muscovite, fengite, sericite, mica such as illite,
Cristobalite, silica such as quartz, attapulgite, hydrous magnesium silicate such as sepiolite, dolomite, calcium carbonate such as calcium carbonate fine powder, gypsum, sulfate minerals such as gypsum, zeolite, zeolite, tuff, vermiculite, laponite, pumice, Examples include diatomaceous earth, acid clay and activated clay. Among them, calcium carbonate is preferable in terms of elution and has an average particle size of 5 to 20.
Especially preferred is μm calcium carbonate, 10-20
More preferred is μm calcium carbonate. Such calcium carbonate is commercially available, for example, Nitto charcoal Cal N.
N200 (Nitto Koka Kogyo) and the like can be mentioned. The mineral carrier is contained in the composition in an amount of 63 to 93.5% by weight.

If necessary, the composition may contain a solvent, a binder, a stabilizer, a colorant and the like within a range that does not impair the effect.

Solvents that can be used in the present composition include, for example, saturated aliphatic hydrocarbons such as hexane, decane, tridecane, hexadecane, and octadecane, unsaturated hydrocarbons such as 1-undecene, 1-heneicocene, and Selechlor S45 ( Halogenated hydrocarbons such as ICI (trade name), ketones such as methyl ethyl ketone and cyclohexanone, alcohols such as ethanol, butanol and octanol, ethyl acetate, dimethyl phthalate, methyl laurate, ethyl palmitate, octyl acetate,
Esters such as dioctyl succinate and didecyl adipate, xylene, ethylbenzene, octadecylbenzene, Solvesso 100 (trade name manufactured by Exxon Chemical), dodecylnaphthalene, tridecylnaphthalene, Solvesso 2
Alkylnaphthalenes such as 00 (trade name manufactured by Exxon Chemical), phenylxylylethane, glycols such as ethylene glycol and diethylene glycol, propylene glycol monomethyl ether, glycol ethers such as ethylene glycol monoethyl ether, oleic acid, capric acid, Fatty acids such as enanthate, N, N
-Acid amides such as dimethylformamide, N, N-diethylformamide, olive oil, soybean oil, rapeseed oil, castor oil, linseed oil, cottonseed oil, palm oil, avocado oil, shark liver oil and other animal oils, machine oils and other mineral oils , Glycerin, glycerin derivatives such as glycerin fatty acid ester, and the like.

Examples of the binder that can be used in the present composition include lignin sulfonate, carboxymethyl cellulose, methyl cellulose, modified starch, degraded starch, dextrin and the like.

Examples of the stabilizer that can be used in the present composition include phenolic antioxidants, amine antioxidants, phosphorus antioxidants, sulfur antioxidants, ultraviolet absorbers, epoxidized soybean oil. , Epoxidized linseed oil, epoxidized vegetable oil such as epoxidized rapeseed oil, isopropyl acid phosphate, liquid paraffin, ethylene glycol and the like.

Examples of the colorant that can be used in the present composition include rhodamines such as rhodamine B and solar rhodamine, and dyes such as yellow No. 4, blue No. 1, red No. 2, and the like. For example, ethyl acetoacetate, ethyl enanthate, ethyl cinnamate, ester-based flavors such as isoamyl acetate, caproic acid, organic acid-based flavors such as cinnamic acid, cinnamic alcohol, geraniol, citral,
Alcohol-based flavors such as decyl alcohol, aldehydes such as vanillin, piperonal and perylaldehyde, maltitol, ketone-based flavors such as methyl β-naphthyl ketone,
Examples include menthol.

The present composition can be produced, for example, by the following method. Rice blast control active ingredient, bentonite,
A mixture is prepared by mixing a nonionic water-soluble polymer, a mineral carrier, and, if necessary, a solvent, a binder, a stabilizer, a colorant and the like. The rice blast control active ingredient is preferably crushed in advance in order to improve the uniformity in the mixture, and the average particle diameter of the crushed rice blast control active ingredient is a measured value using a Coulter counter, for example, It is 2.5 to 7 μm, preferably 3 to 5 μm.

Examples of the mixer used for preparing the mixture include a ribbon mixer, a Nauter mixer, a Shugi mixer, a Henschel mixer, and a Loedige mixer.

Next, an aqueous solution / dispersion in which a nonionic surfactant is dissolved / dispersed in advance is dropped, jetted or sprayed into the mixture and kneaded to prepare a kneaded product. Examples of the kneader used in this case include a Nauta mixer, a ribbon mixer, a Henschel mixer, and a kneader. The amount of water used at the time of kneading is usually 5 to 50% by weight, preferably 10 to 30% with respect to the mixture.
% By weight.

Next, the kneaded product is granulated using a granulator,
Prepare the granulate. Examples of the granulator used at this time include a basket type granulator, a screw type granulator,
Examples thereof include pelletizers, extrusion granulators such as Dome Gran, and the like. The obtained granulated product is dried, and if necessary, subjected to sizing and sieving treatment to obtain the present composition. Examples of the dryer include a fluidized bed dryer and a bed dryer. Examples of the sieving machine include a mulmerizer, pin mill, crusher and the like, and examples of the sieving machine include a gyro shifter and an electromagnetic vibration sieving machine.

The composition is usually an aggregate of cylindrical particles, and the diameter of the particles constituting the composition is usually 0.3 to 30.
mm, preferably 0.5 to 1.2 mm. The length of the grain is usually 0.3 to 80 mm, preferably 0.4 to
It is 5 mm. The number of particles per gram is usually 5 to
50,000 grains, preferably 20 to 30,000 grains,
More preferably, it is 200 to 800 grains. The apparent specific gravity of the particles is usually 0.3 to 1.8 g / ml, preferably 0.7 to 1.5 g / ml. The apparent specific gravity of particles can be measured by the whole farming method.

Examples of the application form of the present composition include surface application to paddy fields, application of nursery boxes, simultaneous application of rice planting, application of water mouth, application of mixture of soil, application of mixture with seeds, and particularly preferred application forms. Examples thereof include application of cultivated soil, application of nursery boxes, and application of seeds. In the case of applying a nursery box, the application amount is usually 0.05 to 40 g, preferably 1.25 to 20 g per one rice nursery box (usually an area of about 0.16 m ² ) converted into the amount of pesticide active ingredient. The application method at that time includes a method of applying directly by hand, a method of applying using a granulating machine for a nursery box, a method of using an automatic granulating device, and the like.

[0023]

EXAMPLES The present invention will be described in more detail with reference to formulation examples, comparative examples and test examples, but the present invention is not limited to the following examples. Formulation Example 1 (1) 2-Cyano-N- (1- (2,4-dichlorophenyl) ethyl) -3,3-dimethylbutyramide (3 parts by weight) and hydrous silicon dioxide (0.5 parts by weight) may be mixed in a juice mixer. After mixing, it was ground with a pin mill. The average particle size of the obtained pulverized product was 3.5 μm (measured value by Coulter counter TA-II). (2) 3.5 parts by weight of the pulverized product obtained in (1), 10 parts by weight of bentonite (trade name: bentonite Fuji, manufactured by Hojun), 2 parts by weight of polyvinyl alcohol, 1 part by weight of starch decomposition product and calcium carbonate fine powder ( 81.5 parts by weight of an average particle size of 15 microns was mixed well with a juice mixer to obtain a powder mixture. 14 parts by weight of a polyoxyethylene styryl phenyl ether aqueous solution (containing 2 parts by weight as polyoxyethylene styryl phenyl ether) was added to the powder mixture and kneaded well. The obtained kneaded product is granulated by a small-sized extrusion granulator with a screen of 0.9 mmφ, dried at 60 ° C. for 15 minutes, and then sized to have a particle size of 1
This composition 1 of 180-500 micrometers was obtained.

Formulation Example 2 3.5 parts by weight of the ground product obtained in Formulation Example 1 (1), 10 parts by weight of bentonite (trade name: bentonite Fuji, manufactured by Hojun), 2 parts by weight of polyvinyl alcohol and calcium carbonate fine powder (average) 81.5 parts by weight (particle size: 15 microns) were mixed well with a juice mixer to obtain a powder mixture. To the powder mixture, 15 parts by weight of a polyoxyethylene styryl phenyl ether aqueous solution (containing 2 parts by weight as polyoxyethylene styryl phenyl ether) was added and kneaded well. The obtained kneaded product is granulated by a small extrusion granulator with a screen of 0.9 mmφ, dried at 60 ° C. for 15 minutes, and then sized to obtain the present composition 2 having a particle size of 1180 to 500 μm.

Formulation Example 3 The present composition 3 is obtained in the same manner as in Production Example 2 except that the amount of bentonite is 5 parts by weight.

Formulation Example 4 The present composition 4 is obtained in the same manner as in Production Example 2 except that the amount of bentonite is 3 parts by weight.

Formulation Example 5 The present composition 5 is obtained in the same manner as in Production Example 2 except that bentonite (trade name: bentonite Fuji, manufactured by Hojun) is replaced with bentonite (trade name: bentonite Myogi, manufactured by Hojun). .

Formulation Example 6 The present composition 6 is obtained in the same manner as in Production Example 2 except that the amount of polyvinyl alcohol is 3 parts by weight.

Formulation Example 7 The present composition 7 is obtained in the same manner as in Formulation Example 2 except that the amount of polyvinyl alcohol is changed to 4 parts by weight.

Formulation Example 8 The present composition 8 is obtained in the same manner as in Formulation Example 2 except that kaolin clay is used instead of the calcium carbonate fine powder.

Formulation Example 9 The present composition 9 is obtained in the same manner as in Formulation Example 2 except that a small extrusion granulator with a screen of 1.2 mmφ is used in place of the small extrusion granulator with a screen of 0.9 mmφ. .

Formulation Example 10 The present composition 10 is obtained in the same manner as in Formulation Example 2 except that a small extrusion granulator with a screen of 1.2 mmφ is used in place of the small extrusion granulator with a screen of 0.9 mmφ. .

Formulation Example 11 2-Cyano-N- (1- (2,4-dichlorophenyl)
Ethyl) -3,3-dimethylbutyramide instead of 2,
The present composition 11 is obtained in the same manner as in Preparation Example 2 except that 2-dichloro-N- (1- (4-chlorophenyl) ethyl) -1-ethyl-3-methylcyclopropanecarboxamide was used.

Formulation Example 12 7 parts by weight of the pulverized product obtained in Formulation Example 1 (1), 10 parts by weight of bentonite (trade name: bentonite Fuji, manufactured by Hojun), 2 parts by weight of polyvinyl alcohol and calcium carbonate fine powder (average particle size) 78 parts by weight (15 micron) were mixed well with a juice mixer to obtain a powder mixture. 18 parts by weight of a polyoxyethylene styryl phenyl ether aqueous solution (containing 2 parts by weight as polyoxyethylene styryl phenyl ether) was added to the powder mixture and kneaded well. The obtained kneaded product is granulated by a small extrusion granulator with a screen of 0.9 mmφ, dried at 60 ° C. for 15 minutes, and then sized to obtain the present composition 12 having a particle size of 1180 to 500 μm.

Formulation Example 13 7 parts by weight of the pulverized product obtained in Formulation Example 1 (1), 10 parts by weight of bentonite (trade name: bentonite Fuji, manufactured by Hojun), 2 parts by weight of polyvinyl alcohol and calcium carbonate fine powder (average particle size) 78 parts by weight (15 micron) were mixed well with a juice mixer to obtain a powder mixture. 18 parts by weight of a polyoxyethylene styryl phenyl ether aqueous solution (containing 2 parts by weight as polyoxyethylene styryl phenyl ether) was added to the powder mixture and kneaded well. The obtained kneaded product is granulated by a small-sized extrusion granulator with a screen of 1.2 mmφ, dried at 60 ° C. for 15 minutes, and then sized to obtain the present composition 13 having a particle size of 1180 to 500 μm.

Comparative Example 1 3.5 parts by weight of the pulverized product obtained in Formulation Example 1 (1), 30 parts by weight of bentonite (trade name: bentonite Fuji, manufactured by Hojun), 2 parts by weight of polyvinyl alcohol, 1 part by weight of decomposed product of starch. And 61.5 parts by weight of calcium carbonate were mixed well with a juice mixer to obtain a powder mixture. Polyoxyethylene nonyl phenyl ether aqueous solution 3 in powder mixture
1 part by weight (containing 2 parts by weight as polyoxyethylene nonylphenyl ether) was added and kneaded well. The obtained kneaded product was granulated by a small extrusion granulator with a screen of 0.9 mmφ, dried at 60 ° C. for 15 minutes, and then sized to obtain Comparative Composition 1 having a particle size of 1180 to 500 μm.

Test Example 1 1 kg / 10 of the present composition 1 was added to rice at 2.5 leaf stage which was cultivated in a tray for plugs in a glass greenhouse at 18 ° C to 30 ° C.
An amount corresponding to R was treated and transplanted into a 100 cm ² wagnet pot. Three, seven, and 28 days after transplantation, diseased seedlings were placed around the pot as an inoculum source, and the lesion area of the upper two leaves excluding undeveloped leaves was investigated. In addition, the same test was carried out using rice that was not treated with this composition, and the lesion area in the untreated section was determined. From these results, the control value was calculated by the following formula. A similar test was conducted using Comparative Composition 1, and the control value was calculated in the same manner. The results are shown in Table 2.

Control value (%) = 100 (X−Y) / X X: Maximum lesion area in untreated area Y: Maximum lesion area in the drug treatment area

[0039]

[Table 1]

[0040]

EFFECTS OF THE INVENTION Since the present composition has an excellent immediate effect on rice blast during drug treatment and an excellent residual effect over a long period of time, it can effectively control rice blast for a long period immediately after drug treatment. it can.

Continued front page    (72) Inventor Hideo Kawanaka             4-2-1 Takashi, Takarazuka-shi, Hyogo Sumitomo             Gaku Kogyo Co., Ltd. F-term (reference) 4H011 AA01 AA03 BA05 BB06 BB15                       BC01 BC07 BC18 BC20 DA02

Claims (4)

[Claims] 1. A) 0.5 to 20% by weight of rice blast controlling active ingredient, b) 3 to 10% by weight of bentonite, c) 1 to 3% by weight of nonionic surfactant, and d) 2 to 2. A granular pesticide composition comprising 4% by weight of a nonionic water-soluble polymer and e) 63-93.5% by weight of a mineral carrier. 2. A rice blast control active ingredient is 2-cyano-N- (1- (2,4-dichlorophenyl) ethyl)-.
3,3-dimethylbutyramide or 2,2-dichloro-
The granular pesticide composition according to claim 1, which is N- (1- (4-chlorophenyl) ethyl) -1-ethyl-3-methylcyclopropanecarboxamide. 3. The granular pesticide composition according to claim 1, wherein the particles constituting the granular pesticide composition have a cylindrical shape, and the diameter of the cylinder is 0.3 to 30 mm. 4. A method for controlling rice blast, which comprises treating the granular pesticidal composition according to any one of claims 1 to 3 in a rice seed or a rice nursery box.