JPH07112963B2 - Herbicide composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a herbicidal composition, particularly to a herbicidal composition that does not cause phytotoxicity even in an adverse environment.

[Prior Art] Herbicides utilize selective toxicity between closely related higher plants, and do not cause phytotoxicity to crops when used under normal use conditions. However, for example, under special conditions in rice cultivation, such as soil conditions, meteorological conditions, physiological conditions of paddy rice, spraying conditions of herbicides, and other adverse factors, phytotoxicity is often given. . When the application of immature organic matter such that a large amount of undecomposed organic matter remains after entering the Honda, impermeability of water and ventilation, deterioration, and abnormal temperature rise after entering the Honda, the rapid soiling of paddy soil occurs. In such a reduced state, the in-plant degradability is also weakened, and the herbicide may be sprayed in large amounts and unevenly distributed, which may cause phytotoxicity to paddy rice.

Currently, due to the diversification of paddy rice cultivation methods, labor shortage in agricultural work, outbreak of highly damaging weeds, mainly perennial weeds, etc.
Numerous admixtures mainly composed of S- (4-chlorobenzyl) N, N-diethylthiolcarbamate [hereinafter referred to as bench ocaborate], for example, 4-chloro-2-methylphenoxybutyric acid ethyl ester [hereinafter referred to as MCPB], 3 −
Isopropyl-1H-2,1,3-benzothiadiadinone-
(4) -3H-one-2,2-dioxide [hereinafter referred to as bentazone], 2,4,6-trichlorophenyl-4-nitrophenyl ether [hereinafter referred to as CNP], 4- (2,4-dichloro) Benzoyl) -1,3-dimethylpyrazole-5-
Il-p-toluenesulfonate [hereinafter referred to as pyrazolate], 2- (2-naphthoxy) -propionanilide [hereinafter referred to as naproanilide], 2-methylthio-
4,6-bisethylamino-s-triazine [hereinafter referred to as cimetrin], and methyl 2-[[[[[4,6-
A mixture with one or two dimethoxypyrimidin-2-yl) amino] carbonyl] amino] sulfonyl] methyl] benzoate [hereinafter referred to as bensulfuron-methyl] is used. These mixed herbicides may also damage rice under the above-mentioned adverse conditions.

Benzenesulfonyl compounds have been provided as substances that prevent the harmful effects of herbicides that occur under the aforementioned adverse conditions (for example, JP-A Nos. 58-105904 and 58-1164).
No. 03, No. 58-128305).

[Problems to be solved by the invention]

However, the composition containing the conventional benzenesulfonyl-based compound as described above is not always satisfactory from the viewpoint of preventing harmful effects of the herbicide, and a herbicide composition with less phytotoxicity is desired.

In order to develop a herbicide that does not cause phytotoxicity even in a bad environment, the present inventors have earnestly studied, and as a result, it is preferable to blend a specific chloromethanesulfonic acid-substituted phenyl ester derivative into a bench ocarb mixture. They have found and completed the present invention.

[Means for solving problems]

The present invention includes (i) S- (4-chlorobenzyl) N, N-diethylthiolcarbamate, and (ii) 4-chloro-2-methylphenoxybutyric acid ethyl ester, 3-isopropyl-1H-2,1,3. -Benzothiadiadinone- (4) -3H-one-2,2-dioxide, 2,
4,6-Trichlorophenyl-4-nitrophenyl ether, 4- (2,4-dichlorobenzoyl) -1,3-dimethylpyrazol-5-yl-p-toluenesulfonate, 2
-(2-naphthoxy) -propionanilide, 2-methylthio-4,6-bisethylamino-s-triazine, and methyl 2-[[[[[(4,6-dimethoxypyrimidin-2-yl) amino] carbonyl ] One or two selected from amino] sulfonyl] methyl] benzoate
The seeds and above are used as herbicidal active ingredients, and (iii) (Wherein X represents a hydroxyl group, an alkyl group, an alkoxy group or a benzoyloxy group), and one or more kinds selected from chloromethanesulfonic acid-substituted phenyl ester derivatives are contained. It is an agent composition.

The herbicidal active ingredient used in the present invention is (i) benchocarb which has been conventionally used, and (ii) one or two kinds selected from MCPB, bentazone, CNP, pyrazolate, naproanilide, cimetrin, and bensulfuron-methyl. The above is blended.

The chloromethanesulfonic acid-substituted phenyl ester derivative (iii) used in the present invention is represented by the above general formula (I), and examples of the compounds contained therein are as shown in Table 1. The compound numbers in Table 1 are referred to in the description below.

The herbicidal composition of the present invention may be composed of only the components (i) to (iii) described above, but a carrier, a surfactant, a dispersant, an auxiliary agent generally used for formulation of pesticides. Etc. can be blended and formulated into various forms such as granules, emulsions, wettable powders, powders and the like.

As the carrier used in the production, for example, Sieglite, talc, bentonite, clay, kaolin, diatomaceous earth, white carbon, vermiculite, slaked lime,
Examples thereof include solid carriers such as silica sand, ammonium sulfate and urea; liquid carriers such as isopropyl alcohol, xylene, cyclohexanone and methylnaphthalene.

Examples of the surfactant and dispersant include alcohol sulfate ester salt, alkylaryl sulfonate, lignin sulfonate, polyoxyethylene glycol ether, polyoxyethylene alkylaryl ether, polyoxyethylene sorbitan monoalkylate and the like. .

Examples of the auxiliary agent include carboxymethyl cellulose,
Examples thereof include polyethylene glycol and gum arabic.

The blending ratio of each component of the herbicide composition of the present invention, such as Benchocarb, is 7 to 10 parts of Benchocarb, and MC
0.1 to 10 for PB, bentazone, CNP, pyrazolate, naproanilide, cimetrin or bensulfuron-methyl
Parts, and the chloromethanesulfonic acid-substituted phenyl ester derivative is preferably in the range of 0.07 to 10 parts. Looking at the case of blending each component, the blending ratio of Benchocarb: CNP: Chloromethanesulfonic acid substituted phenyl ester derivative is 7: 6: 7 to 0.07 by weight ratio, and Benchiocarb: Pyrazolate: Chloromethanesulfonic acid substituted phenyl ester derivative Mixing ratio is 7: 7: 7 to 0.07 by weight, Benchocarb: Naproanilide: Chloromethanesulfonic acid substituted phenylester derivative is 7: 10: 7 to 0.07 by weight, Benchocarb: Cimetrin: Chloromethanesulfonic acid substituted The compounding ratio of the phenyl ester derivative is 7: 1.5: 7 to 0.07 by weight,
Bench-o-curve: Cimetrin: MCPB: Chloromethanesulfonic acid-substituted phenyl ester derivative in a weight ratio of 1
0: 1.5: 0.8: 10 to 0.1, Benchocarb: Cimetrin: Bentazone: Chloromethanesulfonic acid substituted phenyl ester derivative in a weight ratio of 7: 1.5: 7: 7 to 0.07, Benchocarb: Bensulfuron-methyl: Chloromethanesulfone The weight ratio of the acid-substituted phenyl ester derivative is 7:
It is particularly preferable that it is in the range of 0.25 to 0.17: 7 to 0.07.

The herbicidal composition of the present invention is obtained by mixing the above-mentioned components (i) to (iii) and other components to be blended as necessary, and when used, it is diluted to an appropriate concentration and sprayed. Apply or apply directly.

The herbicidal composition of the present invention can be applied from the germination of rice to the 5th to 6th leaf stage, and can be used for direct seeding cultivation, seedling transplant cultivation, adult seedling transplant cultivation and the like.

When the herbicidal composition of the present invention is applied, the compound represented by the general formula (I) is a special paddy field in which the paddy field is in a strongly reduced state due to large-scale application of immature organic substances and other abnormal environmental factors. Can prevent the harmful effects that can be exerted on rice by the Bento curve. Compounds of general formula (I) are disclosed in JP-A-58-105904,
Compared with known adverse effect inhibitors such as JP-A-58-116403 and JP-A-58-128305, the adverse effect can be prevented with an extremely low dose. This is also useful in that it has a smaller impact on the environment. In addition, soil adsorbability is also improved, so even if runoff of paddy water occurs due to rainfall after treatment or overflow,
It has the advantage that the effect of preventing the adverse effects of Bench-O-Curves is stable. Furthermore, since the compound represented by the general formula (I) is rapidly decomposed in soil and has very little effect on soil microorganisms, it is a safe substance without any influence on the environment of soil microorganisms.

〔The invention's effect〕

As described above, since the herbicidal composition of the present invention contains a specific compound in a specific active ingredient, it is possible to prevent phytotoxicity in a bad environment with a small amount of a drug, and to obtain effects such as safety and sustainability. is there.

〔Example〕

Next, the effect of the herbicidal composition of the present invention will be described with reference to Examples. In each example, parts are parts by weight.

Example 1 40 parts of bentonite, 52.8 parts of clay, 0.5 parts of sodium alkylbenzene sulfonate, and 6.7 parts of CNP were mixed and pulverized, then water was added and kneaded, and the mixture was passed through a 0.6 mm screen by an extrusion granulation method and dried. A granular carrier is obtained. While mixing 92.93 parts of the granular carrier containing this CNP in a mixer,
Add 7 parts of Bench-O-Curve and 0.07 parts of compound (1) to the solution for adsorption.

Example 2 Bentonite 20 parts, talc 59.2 parts, diatomaceous earth 10 parts, sodium alkylbenzene sulfonate 3 parts, pyrazolate 7.
After mixing and pulverizing 8 parts, water is added and kneaded, passed through a 0.7 mm screen by an extrusion granulation method, and dried to obtain a granular carrier. While 92.93 parts of this pyrazolate-containing granular carrier was put into a mixer and mixed, 7 parts of Benchocarb and 0.07 parts of compound (1) as a mixed dissolution stock solution were added and adsorbed.

Example 3 The talc in Example 2 was changed from 59.2 parts to 55.9 parts, and pyrazolate was used.
By setting 7.8 parts to Anaproanilide 11.1 parts, Bench-O-Curve, Naproanilide, which has the target compounding ratio,
A mixture of compound (1) is prepared.

Example 4 Bentonite 40 parts, Talc 54.5 parts, White carbon 5
Part, and 0.5 part of sodium alkylbenzene sulfonate are mixed, then water is added and kneaded, and 0.8 mm by extrusion granulation method
It is passed through a screen and dried to obtain a granular carrier. While mixing 90.8 parts of the granular carrier in a mixer and mixing, a mixed solution of 7 parts of Benchocarb, 1.5 parts of cimetrin, and 0.07 part of the compound (1) is added and adsorbed.

Example 5 77.7 parts of the granular carrier obtained according to Example 4 was put in a mixer and mixed, while mixing 10 parts of bench ocarb and 1.
A mixed solution of 5 parts, 0.8 part of MCPB and 10 parts of compound (3) is added and adsorbed.

Example 6 Bentonite (30 parts), clay (48.7 parts), diatomaceous earth (10 parts), sodium alkylbenzene sulfonate (0.5 parts), sodium ligninsulfonate (3 parts) and bentazone (7.8 parts) were mixed and pulverized, and then water was added to the mixture for extrusion granulation. Through a 0.8 mm screen and dry to obtain a granular carrier. 90.8 parts of this granular carrier containing bentazone is put into a mixer and mixed, and a mixed solution of 7 parts of bench ocarb, 1.5 parts of cimetrin and 0.7 parts of compound (4) is added and adsorbed.

Example 7 Bentonite 20 parts, calcium carbonate 64.2 parts, diatomaceous earth 10
Parts, 3 parts of sodium alkylbenzene sulfonate and 2.8 parts of bensulfuron-methyl are mixed and pulverized, then water is added and kneaded, and the mixture is extruded through a 0.8 mm screen and dried to obtain a granular carrier. While mixing 92.3 parts of the granular carrier in a mixer, a mixed solution of 7 parts of Benchocarb and 0.7 part of the compound (4) is added and adsorbed.

Example 8 35 parts of bench ocarb, 7.5 parts of cimetrin, compound (1)
0.35 parts, alkylaryl sulphate (surfactant)
5 parts, polyoxyethylene alkyl aryl ether 5
And 47.15 parts of xylene are mixed and dissolved to prepare an emulsion.

Example 9 Bench O'curve 21 parts, white carbon 15 parts, CNP18
Parts, compound (4) 21 parts, sodium alkylbenzene sulfonate 1 part, and clay 24 parts are added and mixed and pulverized to prepare a wettable powder.

Test Example 1 (Drug damage reduction test of paddy rice) Soil collected from a paddy field of sandy loam soil was filled in a 1/5000 Earl Wagner pot, and 24 g of shredded rice straw was mixed into the pot, and then water was admixed and scavenged. On the 3rd day after substituting, one paddy rice plant of 2 leaf stage (quality: Kinnanfeng) was used, and 2 plants per pot.
Each plant was transplanted. Compounds listed in Table 2 5 days after rice transplantation, and compounds listed in Table 3 15 days after rice transplantation,
The granules prepared according to the above Examples 1 to 7 were treated with the submerged water. The pots were treated twice for each treatment, and after the treatment, they were managed in a glass greenhouse at 20 to 22 ° C at night and 29 to 31 ° C during the day. In the survey, paddy rice plant height was measured 40 days after the treatment.

The results are shown in Tables 2 and 3.

Test Example 2 (Herbicidal effect test) Soil collected from a paddy field of sandy loam soil was filled in a 1/5000 Earl Wagner pot, and water was admitted and scraped. After substituting, the surface water was discarded the next day, and seeds of Taenia cinerea, firefly and eel were sown when the soil surface was exposed.
The pot was allowed to stand in the greenhouse for 5 days, and after weed germination, water was refilled to a depth of 3 cm. When the weeds reached the 1-2 leaf stage, the herbicide composition of the present invention described in Test Example 1 prepared into granules according to Examples 1 to 7 at the same dropping dose and under flooding. Processed. The investigation was conducted on the degree of inhibition of weed growth per pot 30 days after the chemical treatment.

As a result, the addition of the chloromethanesulfonic acid-substituted phenyl ester derivative did not affect the herbicidal effect at all, and the herbicidal composition of the present invention showed a sufficient herbicidal effect.

From the above results, it can be seen that by adding the chloromethanesulfonic acid-substituted phenyl ester derivative, it is possible to stably prevent phytotoxicity against rice without inhibiting the herbicidal effect.

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Claims (8)

[Claims] 1. (i) S- (4-chlorobenzyl) N, N
-Diethylthiolcarbamate, and (ii) 4-chloro-2-methylphenoxybutyric acid ethyl ester, 3-isopropyl-1H-2,1,3-benzothiadiadinone- (4) -3H-one-2,2- Dioxide, 2,
4,6-Trichlorophenyl-4-nitrophenyl ether, 4- (2,4-dichlorobenzoyl) -1,3-dimethylpyrazol-5-yl-p-toluenesulfonate, 2
-(2-naphthoxy) -propionanilide, 2-methylthio-4,6-bisethylamino-s-triazine, and methyl 2-[[[[[(4,6-dimethoxypyrimidin-2-yl) amino] carbonyl ] One or two selected from amino] sulfonyl] methyl] benzoate
The seeds and above are used as herbicidal active ingredients, and (iii) (Wherein X represents a hydroxyl group, an alkyl group, an alkoxy group or a benzoyloxy group), and one or more kinds selected from chloromethanesulfonic acid-substituted phenyl ester derivatives are contained. Agent composition. 2. S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: 2,4,6-trichlorophenyl-
The compounding ratio of 4-nitrophenyl ether: chloromethanesulfonic acid-substituted phenyl ester derivative is 7: 6: 7 by weight.
The herbicidal composition according to claim 1, which is in the range of 0.07 to 0.07. 3. S- (4-Chlorobenzyl) N, N-diethylthiolcarbamate: 4- (2,4-dichlorobenzoyl) -1,3-dimethylpyrazol-5-yl-p-toluenesulfonate: chloro The herbicidal composition according to claim 1, wherein the mixing ratio of the methanesulfonic acid-substituted phenyl ester derivative is in the range of 7: 7: 7 to 0.07 by weight. 4. A compounding ratio of S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: 2- (2-naphthoxy) propionanilide: chloromethanesulfonic acid-substituted phenyl ester derivative in a weight ratio of 7:10 :. The herbicidal composition according to claim 1, which is in the range of 7 to 0.07. 5. A compounding ratio of S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: 2-methylthio-4,6-bisethylamino-s-triazine: chloromethanesulfonic acid-substituted phenyl ester derivative is by weight. Ratio 7: 1.5:
The herbicidal composition according to claim 1, which is in the range of 7 to 0.07. 6. S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: 2-methylthio-4,6-bisethylamino-s-triazine: 4-chloro-2-methylphenoxybutyric acid ethyl ester: chloro The mixing ratio of the methanesulfonic acid-substituted phenyl ester derivative is 10: 1 by weight.
The herbicidal composition according to claim 1, which is in the range of 5: 0.8: 10 to 0.1. 7. S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: 2-methylthio-4,6-bisethylamino-s-triazine: 3-isopropyl-1H-2,
1,3-benzothiadiadinone- (4) -3H-one-2,2-
The herbicidal composition according to claim 1, wherein the blending ratio of the dioxide: chloromethanesulfonic acid-substituted phenyl ester derivative is in the range of 7: 1.5: 7: 7 to 0.07 by weight. 8. S- (4-chlorobenzyl) N, N-diethylthiolcarbamate: methyl 2-[[[[[(4,6
-Dimethoxypyrimidin-2-yl) amino] carbonyl] amino] sulfonyl] methyl] benzoate: Chloromethanesulfonic acid-substituted phenyl ester derivative in a weight ratio of 7: 0.25 to 0.17: 7 to 0.07. The herbicidal composition according to claim 1, which is characterized by the above-mentioned.