JPH11246307A - Herbicide composition for paddy field and weeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition effective for killing weeds resistant to sulfonylurea herbicides, such as weeds belonging to the genus Lindernia, Vandellia angustifolia, Limnophila sessiliflora and Scirpus juncoides by compounding two kinds of specific compounds and a sulfonylurea compound. SOLUTION: This composition comprises (A) (RS)-2-(2,4-dichloro-m-tolyloxy) propionanilide in an amount of 30-90 pts.wt. per 100 pts.wt. of the composition, (B) a sulfonylurea compound [for example, methyl α-(4,6-dimethoxypyrimidin-2- ylcarbamoylsulfamoyl)-o-toluate] in an amount of 0.005-0.6 pts.wt. per pt.wt. of the component A, and (C) 2-[2-(3-chlorophenyl)-2,3-epoxypropyl)-2- ethylindane-1,3-dione in an amount of 0.1-1 pt.wt. per pt.wt. of the component A. The composition is preferably processed into an agricultural formulation and subsequently used at a dose of 0.01 g to 1 kg per 10 are as the active ingredient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel herbicidal composition for paddy fields and a method for herbicide, and more particularly to a herbicidal composition for paddy fields which is effective for sulfonylurea-resistant weeds.

[0002]

2. Description of the Related Art In recent years, as a herbicide for paddy fields, a herbicide containing a sulfonylurea compound as a long-lasting herbicide in paddy fields after transplanting rice seedlings has been used. It has been used in many areas to reduce the frequency.

[0003]

However, as the use thereof increases, weeds resistant to sulfonylurea herbicides, such as azenas, phytospermum, spiders, fireflies and mizuoi, appear, and the control of these has become a problem. Is coming.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, completed the present invention. The present invention relates to (RS) -2- (2,4-dichloro-m-tolyloxy) propionanilide (hereinafter referred to as compound A), a sulfonylurea compound and 2- [2
The present invention relates to a paddy field herbicide composition containing-(3-chlorophenyl) -2,3-epoxypropyl) -2-ethylindane-1,3-dione (hereinafter referred to as compound B) as an active ingredient. Compound A, which is an active ingredient of the present invention, is disclosed in JP-A-57-171904, and compound B is disclosed in JP-A-Hei.
It is a compound described in JP-A-304043, which has herbicidal activity. The compounding ratio of the compound A is selected from the range of 30 to 90 parts by weight in the paddy field herbicide composition with respect to 100 parts by weight of the paddy field herbicide composition of the present invention. According to the method, it may be formulated into granules, emulsions, flowables and the like.

As a sulfonylurea compound which is one of the active ingredients of the present invention, for example, methyl = α- (4,6
-Dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -o-toluate (generic name: bensulfuron-methyl), 1- (4,6-dimethoxy-1,3,5-
Triazin-2-yl) -3- [2- (2-methoxyethoxy) phenylsulfonyl] urea (generic name: sinosulfuron), ethyl 5- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -1 -Methylpyrazole-4-carboisylate (generic name: pyrazosulfuron-ethyl), 1- (2-chloroimidazo [1,2-a] pyridin-3-ylsulfonyl) -3-
(4,6-dimethoxypyrimidin-2-yl) urea (generic name: imazosulfuron), 1-{[cyclopropylcarbonyl) phenyl] sulfamoyl} -3-
(4,6-dimethoxypyrimidin-2-yl) urea (generic name: cyclosulfamuron), N-[(4,6-
Dimethoxypyrimidin-2-yl) aminocarbonyl-
1-methyl-4- (2-methyl-2H-tetrazole-
5-yl) -1H-pyrazole-5-sulfonamide (generic name: azimsulfuron), 3- (4,6-dimethoxypyrimidin-2-yl) -1- (2-ethoxyphenoxysulfonyl) urea (generic name: Ethoxysulfuron) and the like, and these can be used alone or in combination of two or more. The fact that these compounds have herbicidal activity is disclosed, for example, in JP-A-62-1656.
No. 7, JP-A-3-41007 and the like.

The proportion of the active ingredient in the paddy field herbicidal composition is 0.005 to 0.6 parts by weight of the sulfonylurea compound and 0.1 to 0.1 parts by weight of the compound B based on 1 part by weight of the compound A.
It may be appropriately selected from the range of 1 part by weight, blended, and formulated into granules, emulsions, flowables and the like in accordance with a conventional method for agricultural chemical formulations. When using the paddy field herbicide composition of the present invention,
The composition in the form of a preparation according to the purpose may be used as it is, or may be diluted with water or the like, and the amount used may vary depending on the size of the weeds to be controlled, the time of occurrence, etc. Usually, the treatment may be performed in the range of 0.01 g to 1 kg, preferably in the range of 0.1 g to 0.1 kg.

The present invention has a remarkable herbicidal effect on important weeds in paddy fields, for example, weeds such as Nobie, Tamayatsuri, pine tree, urikawa and firefly, and is a paddy field weed which is resistant to sulfonylurea herbicides. The expressed azena, zephyllum, spider, firefly, water mallow and the like also have a remarkable herbicidal effect.

[0008]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples. In the examples,
Parts are parts by weight. Embodiment 1 FIG. 2. Granules Compound A 7.0 parts Bensulfuron-methyl 0.6 parts Azimsulfuron 0.12 parts Compound B 3.0 parts Polyethylene powder 10.0 parts Potassium chloride 74.28 parts Surfynol 465 (Air Products) 0 parts Gohsenol GL-04 (Nippon Synthetic Chemical Company) 1.0 part Sodium polyacrylate 1.0 part ────────────────────────── ───────── Total 100.0 copies

Embodiment 2 Granules Compound A 3.5 parts Bensulfuron-methyl 0.7 parts Compound B 1.5 parts Bentonite 30.0 parts Calcium carbonate 59.8 parts Soda ash 0.5 parts Toxanone GR-31A (40% product, Sanyo Chemical) Industrial Co., Ltd.) 2.0 parts Newcol 565SNC (Nippon Emulsifier) 1.0 part Neocoll YSK (Daiichi Kogyo Pharmaceutical) 1.0 part ────────────────── ───────────────── Total 100.0 copies

Embodiment 3 Flowable formulation Compound A 7.0 parts Bensulfuron-methyl 1.4 parts Compound B 3.0 parts Hytenol N-08 (Daiichi Kogyo Seiyaku Co., Ltd.) 0.3 parts Demol T (Kao Corporation) 2.0 parts Propylene glycol 5.0 parts Silicon KM-73 (Shin-Etsu Chemical) 0.5 parts Proxel GXL (Zeneca) 0.1 parts Rhodopol 23 (Rhone Poulin) 0.2 parts Kunipia G (Kunimine Industries) 1.0 parts 79.5 parts of water ─────────────────────────────────── 100.0 parts in total

Test Example 1 The herbicidal effect of the sulfonylurea herbicide resistance on the firefly. The soil was filled in a 1/1000 are pot to form a paddy field, and seeds of a paddy field weed, a sulfonylurea herbicide sensitive and resistant, were grown to be in a flooded state and adjusted to 1.5 leaf stage. . This was treated with the herbicidal composition of the present invention as a spray solution having a predetermined concentration. Twenty-one days after the treatment, the herbicidal effect was investigated, and the herbicidal effect was calculated in comparison with the non-treatment. First result
It is shown in the table.

[0012]

[Table 1] In the table, ai indicates an active ingredient.

Claims (6)

[Claims] (1) (RS) -2- (2,4-dichloro-m
-Tolyloxy) propionanilide, a sulfonylurea compound and 2- [2- (3-chlorophenyl)-
2,3-epoxypropyl) -2-ethylindane-
A herbicidal composition for a paddy field, comprising 1,3-dione as an active ingredient. 2. The method according to claim 1, wherein the sulfonylurea compound is methyl =
α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -o-toluate, 1- (4
6-dimethoxy-1,3,5-triazin-2-yl)
-3- [2- (2-methoxyethoxy) phenylsulfonyl] urea, ethyl 5- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -1-
Methylpyrazole-4-carboxylate, 1- (2-
Chloroimidazo [1,2-a] pyridin-3-ylsulfonyl) -3- (4,6-dimethoxypyrimidine-2-
Yl) urea, 1-{[cyclopropylcarbonyl) phenyl] sulfamoyl} -3- (4,6-dimethoxypyrimidin-2-yl) urea, N-[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl -1-
Methyl-4- (2-methyl-2H-tetrazole-5
Yl) -1H-pyrazole-5-sulfonamide and 3
-(4,6-dimethoxypyrimidin-2-yl) -1-
The herbicidal composition for a paddy field according to claim 2, which is one or more compounds selected from (2-ethoxyphenoxysulfonyl) urea. 3. (RS) -2- (2,4-dichloro-m
-Tolyloxy) propionanilide to 1 part by weight, 0.005 to 0.6 parts by weight of a sulfonylurea compound and 2- [2- (3-chlorophenyl) -2,3-
The herbicidal composition for a paddy field according to claim 2, wherein the amount of (epoxypropyl) -2-ethylindane-1,3-dione is in the range of 0.1 to 1 part by weight. 4. (RS) -2- (2,4-dichloro-m
-Tolyloxy) propionanilide, a sulfonylurea compound and 2- [2- (3-chlorophenyl)-
2,3-epoxypropyl) -2-ethylindane-
A herbicidal method for a paddy field, comprising treating an effective amount of a paddy field herbicide composition containing 1,3-dione as an active ingredient. 5. The method according to claim 5, wherein the sulfonylurea compound is methyl =
α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -o-toluate, 1- (4
6-dimethoxy-1,3,5-triazin-2-yl)
-3- [2- (2-methoxyethoxy) phenylsulfonyl] urea, ethyl 5- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -1-
Methylpyrazole-4-carboxylate, 1- (2-
Chloroimidazo [1,2-a] pyridin-3-ylsulfonyl) -3- (4,6-dimethoxypyrimidine-2-
Yl) urea, 1-{[cyclopropylcarbonyl) phenyl] sulfamoyl} -3- (4,6-dimethoxypyrimidin-2-yl) urea, N-[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl -1-
Methyl-4- (2-methyl-2H-tetrazole-5
Yl) -1H-pyrazole-5-sulfonamide and 3
-(4,6-dimethoxypyrimidin-2-yl) -1-
The herbicidal method according to claim 4, which is one or two or more compounds selected from (2-ethoxyphenoxysulfonyl) urea. 6. An amount of an effective ingredient of 0.1 per 10 ares.
The weeding method according to claim 4, wherein the treatment is performed in a range of from 01 g to 1 kg.