JPH1053503A - Formulation for throwing into paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare the subject formulation capable of controlling weeds in a paddy field or disease injuries of paddy rice according to a simple method without being influenced by weather by enclosing a specific active ingredient in a specified container. SOLUTION: This formulation for throwing into a paddy field is prepared by enclosing an agricultural application agent on water surface obtained by dissolving a hardly water-soluble or a water-insoluble herbicidally or a germicidally active ingredient in a water-insoluble high-boiling solvent in a water-soluble container (e.g. polyvinyl alcohol). Naproanilide, benthiocarb, pretilachlor and oxadiazon are cited as the herbicidally active ingredient used and fthalide, isoprothiolane, etc., are cited as the germicidally active ingredient. The formulation for throwing into the paddy field is preferably applied to the flooded paddy field so as to provide 1-100 containers based on 10 a and 50-300g total weight of the formulation for throwing into the paddy field.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the control of paddy field weeds or rice diseases, and more particularly to a preparation for controlling paddy field weeds or rice diseases.

[0002]

2. Description of the Related Art In recent years, paddy fields have been rapidly increased in size and mechanized in order to reduce the cost of rice cultivation. In response to this, various labor-saving formulations and sprayers have also been developed for spraying pesticides, and significant technological innovation has been made in the direction of labor saving. However, in practice, the spraying of pesticides in paddy fields still requires the use of a spreader or the like in which powders, granules, emulsions, wettable powders, flowables, etc., have been developed. It is an operation while entering and carrying a heavy spraying machine or the like. Therefore, while the time required for spraying pesticides is shorter than before, it is a serious task for elderly workers, which has been increasing in recent years, and the development of more labor-saving formulations and application methods is desired. ing.

[0003] One of the measures for reducing labor is airborne spraying using a helicopter. However, there are problems such as environmental pollution due to drift and influence on automobile painting, and the spread thereof is limited. In addition, many herbicides have been studied mainly for jumbo agents that only need to be thrown in several tens per paddy field 10a. However, there are problems such as effects and long-term storage properties, and there are only a few types that have been put into practical use. It is the current situation. In addition, a flowable agent has been developed as an application method that does not use a machine, and ridge treatment is also performed. However, it has a drawback that it cannot be sprayed unless it enters a paddy field on a steep slope or the like.

[0004]

SUMMARY OF THE INVENTION The present invention solves such problems and does not require a special chemical sprayer, is not affected by the weather, and is merely thrown from a ridge without entering a paddy field. It is an object of the present invention to provide a formulation suitable for controlling paddy weeds and paddy diseases by a simple treatment method.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to an agricultural water surface application in which a poorly water-soluble or water-insoluble herbicidal or germicidal active ingredient is dissolved in a water-insoluble high-boiling solvent having a specific gravity of 1 or less. A throw-in preparation for paddy fields, wherein the throw-in preparation for paddy fields comprises
1 to 100 pieces per a and the total weight of the throw-in preparation is 5
A method for controlling paddy weeds and paddy rice diseases, characterized by throwing into a flooded paddy field so as to be 0 to 3000 g, dissolving the container in water and dispersing the formulation in the surface water.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The water-soluble container referred to in the present invention is
This shows a bag made of a water-soluble film such as polyvinyl alcohol, water-soluble cellulose or gelatin, and a molded product obtained by molding the above-mentioned material. The shape of the water-soluble container does not greatly affect its medicinal properties, and is not particularly limited, and is not particularly limited, and is square or rectangular in a bag-making product, box-like in a molded product,
Examples thereof include a columnar shape, a spherical shape, a conical tetrahedron shape, a bottle shape, an elliptical spherical shape, and a rod shape, but are not limited thereto as long as a liquid surface application preparation can be included. The thickness of these containers is a major factor that determines the time required for the contained surface-applied preparation to flow out, but is also restricted by ease of molding, storage stability, and the like. In the case of a bag product, the thickness is preferably 0.01 to 1.0 mm, and in the case of a molded product, it is preferably 0.1 to 3 mm. The throw-in preparation according to the present invention, when applied to a flooded paddy field, floats on the surface of the water and dissolves in a water-soluble container upon contact with water, and the contained surface-application preparation spreads the water surface and diffuses in the water. And spread evenly throughout the paddy field.

The throwing agent according to the present invention is obtained by dissolving a herbicidal or fungicidal active ingredient that is hardly soluble or insoluble in water in a water-insoluble high-boiling solvent having a specific gravity of less than 1 and adding a surfactant. Become. The non-water-soluble high-boiling solvent referred to in the present invention includes fatty acid esters such as amyl laurate, butyl oleate, and diesters such as ethyl adipate, dioctyl adipate, di-2-ethylhexyl maleate, and alkylbenzene. , Diphenylmethanes, and phthalic esters such as di-n-octyl phthalate, diisooctyl phthalate, diisononyl phthalate, diisodecyl phthalate, and liquid paraffin. These solvents can be used alone or in combination of two or more, and are not limited to these as long as they have a high boiling point satisfying the above conditions. The surfactant used in the present invention spreads and diffuses the active ingredient dissolved in the high boiling point solvent throughout the paddy field. Examples thereof include fatty acid salts, higher alcohol sulfates, fatty oil sulfates, and aliphatic amines. Anionic surfactants such as sulfates of aliphatic amides, phosphates of aliphatic alcohols, sulfonates of dibasic fatty esters, aliphatic amidesulfonates, and naphthalenesulfonates of formalin condensation , Polyoxyethylene alkyl ether type, polyoxyethylene phenyl ether type,
Non-ionic surfactants such as polyoxyethylene alkyl ester, sorbitan alkyl ester, and polyoxyethylene sorbitan alkyl ester are exemplified. Surfactants can be used as one or two
It may be used as a mixture of more than two kinds, or as a mixture of an anionic surfactant and a nonionic surfactant.

[0008] The poorly soluble or water-insoluble herbicidal or fungicidal active ingredient of the present invention is not particularly limited.
The active ingredient is selected from the active ingredients used for controlling the disease of paddy weeds and rice, and examples thereof include the following compounds and their active isomers or mixtures thereof.

The following herbicidal active ingredients are listed. (1) α- (naphthoxy) propionanilide; naproanilide (2) s- (4-chlorobenzyl) -N, N-diethylthiocarbamate; benthiocarb (3) 2-chloro-2 ′, 6′-diethyl-N- (2-propoxyethyl) acetanilide; pretilachlor (4) (RS) -2-bromo-N- (α, α-dimethylbenzyl) 3,3-dimethylbutyramide; bromobutide (5) 2-benzothiazol-2-yloxy -N-methylacetanilide; mefenacet (6) 1- (α, α-dimethylbenzyl) -3- (paratolyl) urea; Daimulon (7) methyl = α- (4,6-dimethoxypyrimidine)-
2-ylcarbamoylsulfamoyl) -O-triate; bensfuronmethyl (8) ethyl = 5- (4,6-dimethoxypyrimidine-2
-Ylcarbamoylsulfamoyl) -1-methylpyrazole-4-carboxylate; pyrazosulfuronethyl (9) 1- (4,6-dimethoxypyrimidin-2-yl)
-3- (3-trifluoromethyl-2-pyridylsulfonyl) urea; furazasulfuron (10) 1- (2-chloroimidazo [1,2-α] pyridin-3-ylsulfonyl) -3- (4, 6-dimethoxypyrimidin-2-yl) urea; imazosulfuron (11) 2-methylthio-4,6-bis (ethylamino)
-S-triazine; simethrin (12) 2-methylthio-4-ethylamino-6- (1,
2-dimethylpropylamino) -s-triazine; dimethamethrin (13) 5-tert-butyl-3- (2,4-dichloro-5-isopropoxyphenyl) -1,3,4-oxadiazolin-2-one Oxadiazone (14) 4- (2,4-dichlorobenzoyl) -1,3-
Dimethyl-5-pyrazolyl-p-toluenesulfonate; pyrazolate (15) 2- [4- (2,4-dichlorobenzoyl)-
1,3-dimethyl-pyrazol-5-yloxy] acetophenone; pyrazoxifen (16) 2- [4- (2,4-dichloro-m-toluoyl) -1,3-dimethylpyrazol-5-yloxy]
4-methylacetophenone; benzophenap (17) S-benzyl = 1,2-dimethylpropyl (ethyl) thiocarbamate; esprocarb (18) S-ethylhexahydro-1H-azepine-1-
Carbothioate; Molinate (19) S-1-methyl-phenylethyl-piperidine-
1-carbothioate; dimepiperate (20) O-3-tertbutylphenyl = 6-methoxy-2-pyridyl (methyl) thiocarbamate; pyributicarb,

[0010] The following are examples of the fungicides. (1) 4,5,6,7-tetrachlorophthalide; fusalide (2) O, O-diisopropyl-s-benzylthiophosphate; IBP (3) O-ethyl-S, S-diphenyldithiophosphate; EDDP ( 4) 1,2-bis (3-methoxycarbonyl-2-thioureido) benzene; thiophanate methyl (5) 3- (3,5-dichlorophenyl) -N-isopropyl-2,4-dioxoimidazolidin-1-carboxamide; Iprodione (6) methyl-1- (butylcarbamoyl) -2-benzimidazole carbamate; benomyl (7) α, α, α-trifluoro-3′-isopropoxy-o-toluanilide; flutranil (8) 1- (4 -Chlorobenzyl) -1-cyclopentyl-3-phenylurea; pencyclone (9) 2,4-dichloro-6- (orthochloro Nirino)
-1,3,5-triazine; diclomedine (10) (Z) -2′-methylacetophenone = 4,6-
Dimethylpyrimidin-2-ylhydrazone; ferimzone (11) 3-allyloxy-1,2-benzisothiazole-1,1-dioxide; probenazole (12) diisopropyl = 1,3-dithiolan-2-ylidene-malonate; isoprothiolane ( 13) 5-Methyl-1,2,4-triazolo [3,4-
b] Benthiazole; Tricyclazole (14) 1,2,5,6-tetrahydropyrrolo [3,2
1-i] quinolin-4-one; pyroquinone

In the present invention, the concentration of the active ingredient in the water-applied preparation contained in the container is limited by the specific gravity of the whole water-applied preparation, although it depends on the kind of the component used. That is,
In order for the surface application preparation to spread and diffuse effectively, it is essential that the specific gravity of the preparation be less than 1, and it is necessary to adjust the specific gravity of the active ingredient, the specific gravity of the content and the solvent, and the content. In addition, the upper limit and the lower limit are set for the content of the active ingredient from the restrictions of spraying efficiency, product cost, and the like, and the preferable concentration is 0.5% to 50%, and more preferably 1 to 50%.
20%. The amount of the surfactant used in the preparation is usually 0.1 to 20%, preferably 1 to 10%.

In the present invention, the throwing agent is used in an amount of 1 to 100 per 10a and the total weight of the throwing agent is 50 to 3
000 g. Further preferred application methods include water-soluble container manufacturing methods, sizes, active ingredients,
Although it cannot be unconditionally specified by the difference in the type of high-boiling-point solvent and surfactant, and the mixing ratio, a water-containing preparation containing 20 to 200 g per water-soluble container is 1
Apply 1 to 20 per 0a. Thus, since the throwing agent of the present invention may be thrown into the paddy field from the ridge without entering the paddy field, the operation at the time of spraying is extremely simple, and the conventional granules,
It is labor-saving compared to dusts and the like, and is suitable for controlling weeds and diseases that occur in paddy fields.

[0013]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. Note that “parts” in the preparation examples represents parts by weight.

Example 1 88 parts of liquid paraffin, 2 parts of Neugen EA-70 [Daiichi Kogyo Seiyaku] and 10 parts by weight of oxadiazone were mixed to obtain an oil containing 10% oxadiazone. This 50
g was enclosed in an ampoule-type container (100 ml in content) obtained by blow molding a polyvinyl alcohol resin to obtain a casting agent.

Example 2 88 parts of dinormal octyl phthalate, Neugen EA-
70 [Daiichi Kogyo Pharmaceutical Co., Ltd.] 2 parts
0 parts by weight were mixed to obtain an oil containing 4% of pretilachlor. An ampoule-type container obtained by blow molding 50 g of this polyvinyl alcohol resin (content 100 m)
1) to obtain a casting agent.

Example 3 94 parts of dinormal octyl adipate, Neugen EA
2 parts of -70 [Daiichi Kogyo Seiyaku] and 4 parts by weight of benthiocarb were mixed to obtain an oil containing 4% of benthiocarb.
50 g of this was sealed in an ampoule-type container (content 100 ml) obtained by blow molding a polyvinyl alcohol resin to obtain a casting agent.

Example 4 88 parts of mixed xylene, 2 parts of Neugen EA-70 [Daiichi Kogyo Seiyaku] and 10 parts by weight of naproanilide were mixed.
An oil solution containing 10% of naproanilide was obtained. 50 g of this was sealed in an ampoule-type container (content 100 ml) obtained by blow molding a polyvinyl alcohol resin to obtain a casting agent.

Example 5 88 parts of dinormal octyl phthalate, Neugen EA-
70 [Daiichi Kogyo Seiyaku] was mixed with 10 parts by weight of IBP to obtain an oil containing 10% of IBP. 50 g of this was sealed in an ampoule-type container (content 100 ml) obtained by blow molding a polyvinyl alcohol resin to obtain a casting agent.

Example 6 88 parts of dinormal octyl phthalate, Neugen EA-
70 [Daiichi Kogyo Seiyaku] was mixed with 10 parts by weight of EDDP to obtain an oil containing 10% of EDDP. This 50g
Was sealed in an ampoule-type container (volume: 100 ml) obtained by blow molding a polyvinyl alcohol resin to obtain a casting agent.

Example 7 88 parts of dinormal octyl phthalate, Neugen EA-
70 [Daiichi Kogyo Seiyaku] 2 parts and isoprothiolane 10
The parts by weight were mixed to obtain an oil containing 10% of isoprothiolane. An ampoule-type container obtained by blow molding 50 g of this polyvinyl alcohol resin (content 100 m)
1) to obtain a casting agent.

Test Example 1 Test of Herbicidal Effect on Nobies A test plot of 5 m × 10 m was made in a paddy field seeded with Nobies after shaving, and kept at a water depth of 5 cm. Example 1-3 and a comparative agent prepared so that the herbicidal active ingredients had the same dosage were applied to the test plot on the fourth day after sowing of Nobies. Twenty days after the introduction, the herbicidal effect on the fly was investigated. The results are shown in Table 1 (Table 1). In the table, the degree of damage to nobies is indicated by the following criteria, as compared to the case of no treatment. Indication Growth rate (%) expressed by air dry weight vs. untreated area 50-54, 106-103, 11-40, 41-701, 71-90, 91-100

[0022]

[Table 1]

[0023] Test Example elapsed 4 weeks after control effect test planting for 2 blast, one partition 50 m ² of outdoor water paddy field flooding conditions leaves old rice grew to approximately 5 leaves, Example 5
The formulation shown in -7 and commercially available granules and emulsions in other sections were evenly applied so that the bactericidal active ingredient was the same amount as in the examples. The results are shown in Table 2 (Table 2).

[0024]

[Table 2]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication A01N 47/12 A01N 57/14 Z 57/14 43/82 101E (72) Inventor Masahiro Tokuma Mitsuru Chiba 1144 Togo, Mobara-shi Mitsui Toatsu Chemicals Co., Ltd. (72) Inventor Koichi Nagashima 1144 Togo, Togo, Mobara-shi, Chiba Pref. Chemical Co., Ltd.

Claims (5)

[Claims] 1. An agricultural water surface application in which a herbicidal or bactericidal active ingredient that is hardly soluble or insoluble in water is dissolved in a water-insoluble high-boiling solvent having a specific gravity of 1 or less, is enclosed in a water-soluble container. Characteristic throw-in preparation for paddy fields. 2. The throw-in preparation for paddy fields according to claim 1, wherein the material of the water-soluble container is polyvinyl alcohol. 3. The throw-in preparation for paddy field according to claim 1, wherein the herbicidal active ingredient is naproanilide, benthiocarb, pretilacool, or oxadiazone. 4. The throw-in preparation according to claim 1, wherein the fungicidal active ingredient is IBP, EDDP, or isoprothiolane. 5. An agricultural water surface application in which a herbicidal or germicidal active ingredient that is hardly soluble or insoluble in water is dissolved in a nonpolar high-boiling solvent having a specific gravity of 1 or less. A method for controlling a disease of a weed or a rice plant in a paddy field by applying the preparation to a flooded sewage paddy so that 1 to 100 per 10a and the total weight of the cast preparation is 50 to 3000 g.