JPS58116403A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition, prepared by incorporating a mixed benthiocarb formulation with a specific benzenesulfonyl compound or naphthylsulfonyl compound in a specific proportion, and having high herbicidal effects without causing phytotoxicity to rice plants even in a bad environment. CONSTITUTION:A herbicidal composition prepared by incorporating a herbicidal active component containing S-(4-chlorobenzyl)N,N-diethylthiolcarbamate (benthiocarb) and ethyl 4-chloro-2-methylphenoxybutyrate, 3-isopropyl-1H-2,1,3-benzothiadiazinone-(4)-3H-one-2,2-dioxide, 2,4,6-trichlorophenyl-4'-nitrophenyl ether, etc. with a benzenesulfonyl compound expressed by formulaI(X is H, Cl or Br) or a naphthylsulfonyl compound expressed by formula II. The mixing weight ratio is as follows: 7-10pts.wt. benthiocarb, 0.8-10pts.wt. other herbicidal active component and 0.7-10pts.wt. compound expressed by formulaI or II.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a herbicide composition, and an object thereof is to provide a herbicide having high selectivity between weeds and crops.

Herbicides are used selectively among near-green higher plants, and when used under normal usage conditions, they do not cause any phytotoxicity to crops. However, for example, in rice cultivation, there are special conditions such as soil conditions, weather conditions, and water. Application of immature organic matter that leaves a large amount of undecomposed organic matter after watering Honda, poor water permeability and aeration, aging, abnormal temperature rise after watering Honda, and other factors will cause strong reduction of paddy soil. In such a reduced state, the decomposition ability within the plant is also weakened.

Currently, due to the diversification of rice cultivation methods, labor shortages in agricultural work, and the outbreak of harmful weeds mainly perennial weeds,
A number of admixtures based on -(4-chlorobenzyl)N,N-diethylthiolcarbame) (hereinafter referred to as hentiocarb) have been used or tested. For example, 4-chloro-2-methylphenoxybutyric acid ethyl ester (hereinafter referred to as MCPB), 5-ingrobyl-IH
-2,1j-benzothiadiazinone-(4) -5-one-2,2-dioxide (hereinafter referred to as basagran),
2,4.6-)9/lorphenyl 4-nitrophenyl ether (hereinafter referred to as NO-338), 4-(2,4-
dichlorobenzoyl)-1,5-dimethylpyrazol-5-yl-p-toluenesulfone) (hereinafter referred to as ilvirazolate), 2-(2-su78xy)-propionanilide (hereinafter referred to as MT-101). ) and 2-methylthio-4,6-pisethylamino-8-)riazine (hereinafter referred to as simetrine), ), etc., and mixtures with 01 type or 2NA are known. These mixed herbicides may also cause chemical damage to rice under the aforementioned adverse conditions.

In order to develop a mixed herbicide that does not suffer from chemical damage even in these adverse environments, the present inventors conducted intensive research and identified a certain percentage of benzenesulfonyl compounds or naphthylsulfonyl compounds in the bentiocarb mixture. It has been found that it is preferable to mix in the ratio of

The herbicide composition of the present invention comprises benchocarb and MCPB,
Basagran, MO-338, Virazolate, MT-10
1, and one or more types of cymetrine as herbicidal active ingredients, and one type of phthylsulfonyl compound (formula %), and these compounds can be used as clay, talc, bentonite, and emulsifiers. is added to form granules or powders. Depending on the usage situation and purpose, it can also be made into wettable powders or emulsions using general formulation techniques.

It is a benzenesulfonyl compound or 7-tylsulfonyl compound according to the present invention. Compound numbers are referenced in the following description.

Table 1 The compounding ratio of each compound in the herbicide composition of the present invention is 7 to 10 parts by weight of bentiocarb and MCPB.

Basagran, MO-338, Virazolate, MT-10
1. 0.8 to 10 parts of cymetrine etc., 0.07 parts of benzenesulfonyl compound or naphthylsulfonyl compound
It is within the range of 10 parts.

The herbicide composition of the urine invention can be applied to rice from the time of rice germination to the 5th to 6th Qin stage, and can be used for direct sowing cultivation, seedling transplant cultivation, adult seedling transplant cultivation, etc.

The herbicidal composition of the present invention prevents the harmful effects of the bentiocarb mixture on rice plants even under adverse conditions, and improves the herbicidal effect.

Next, the effects of the herbicide of the present invention will be explained by giving test examples.

Test Example 1 (Paddy rice phytotoxicity reduction test) Soil collected from a sandy loam paddy field was filled into Wagner pots with a capacity of 15,000 are. Shredded rice straw was mixed in and water was poured into the water, followed by plowing.

The next day after plowing, grow 2 paddy rice (variety: Zennanfu) seedlings at 2nd stage.
Two plants were transplanted per pot.

The compounds listed in Table 2 were sprayed on 58 ridges of paddy rice transplants while still being flooded. The pot was replicated twice per treatment. Treatment
Ie was maintained in a greenhouse at 18°C at night and 28°C during the day. The investigation was conducted on the plant height and number of plants per 1κ plant 50 days after transplantation.

, the guide strips are shown in Table 2.

Table 2 Test Example 2 (Herbicidal effect test) Using the same method and scale as Test Example 1, soil was placed in a Wagner pot and plowed for one generation, and the next day after plowing, the water in the surface layer was discarded to expose the soil surface. Approximately 20 seeds of firefly and Nagi were sown per pot. These seeds were collected in autumn and stored in a refrigerator under humid, low temperature conditions to break dormancy. The pot was left in a greenhouse for 5 days, and when the weed seeds had germinated, it was re-filled with water to a depth of 300 million ml. The pot was left in the greenhouse for another 5 days until the weeds reached the 1-2 leaf stage. At that time, the compounds listed in Table 5 were treated as they were in the water. The investigation was conducted by measuring the number of 1κ weeds remaining per pot after 50 days of treatment.

The results are shown in Table 3.

Table 3 Test example 3 (paddy rice phytotoxicity reduction test) Shredded rice straw from No. 1 was mixed in and water was poured into the water, followed by plowing.

The compounds listed in Table 4 were sprayed on the 58th edge of the plow while the water was still submerged. The next day after processing! Two paddy rice (variety: Zennanfaze) seedlings at the /c3-leaf stage were transplanted into each pot, with two seedlings per pot. The pot was replicated twice per treatment.

Treatment He was kept in a greenhouse at 18°C at night and 28°C during the day.

The survey was carried out on 50 rota transplants and the plant height and number of stems per plant.

The results are shown in Table 4.

Table 4 Test Example 4 (Herbicidal effect test) Soil was put into a Wagner pot and plowed using the same method and scale as Test Example 3, and the next day after plowing, the surface layer water was discarded to expose the soil surface, and the soil surface was exposed to grasshoppers. Approximately 20 Hotarui seeds per pot and 10 Urikawa tubers.
The seeds were sown one by one. These seeds were collected in autumn and stored in a refrigerator under a humid, low-vortex environment to break dormancy.

The plants were left in the greenhouse for 5 days, and when the weed seeds had germinated, they were re-filled with water at a depth of 5aII. They were left in the greenhouse for another 5 days, and when the weeds had reached the 1-2 leaf stage. The compounds listed in Table 5 were treated as they were in water. The number of weeds remaining per pot was measured on the 30th day of treatment.

The results are shown in Table 5.

Test Example 5 (Paddy Rice Harm Reduction Test) Rice plants were transplanted into Wagner pots using the same method and scale as in Test Example 1, and 15 days after transplantation, the compounds listed in Table 6 were sprayed while still in water. The pot contained two seeds per treatment. After treatment, the plants were kept in a greenhouse at 15°C at night and 25°C during the day. The investigation was conducted in the same manner as Test Example 1.

The results are shown in Table 6.

Table 6 Test@d (Herbicidal effect test) Using the same method and scale as Test Example 1, soil was placed in a Wagner pot and plowed for one generation, and the next day after plowing, the water in the surface layer was discarded to expose the soil surface. Approximately 20 seeds of firefly and Nagi were sown per pot. These seeds were collected in autumn and stored in a cold, humid room at low temperatures to break dormancy. Leave it in the greenhouse for 5 days, and check if weed seedlings have germinated, then re-water the wound to the depth of the wound and leave it for another 15 days, until the weeds have sprouted.
When the four-leaf stage was reached, the plants were treated with the compounds listed in Table 7 while still submerged in water. The investigation was conducted by measuring the number of weeds remaining per pot on day 30 of treatment.

The results are shown in Table 7.

Table 7 Soil was placed in a Wagner pot using the same method and scale as in Test Example 1, and the next day after the first generation, the water in the surface layer was discarded to expose the soil surface. 20 grains, 10 Kurikawa tubers
The seeds were sown one by one.

These seeds were collected in autumn and stored in a refrigerator under humid, low temperature conditions to break dormancy. On the 5th, I checked the area where the weed seeds had germinated due to discharge in the greenhouse.
Re-enter the water to a depth of 1, leave it for another 15 days, and the weeds will grow! 1~
When the four-leaf stage was reached, the plants were treated with the compounds listed in Table 8 while still being flooded. In the investigation, the number of 0k weeds remaining per pot was measured 30 days after treatment.

The results are shown in Table 8.

Table 8 The following is a formulation example of the herbicidal composition of the Kt invention.

Example 1 (Granules) 40 parts of bentonite, 52.8 parts of clay, sodium alkylbenzenesulfonate α511S, MO-1584
After mixing and pulverizing 7 parts, water was added, kneaded, and extrusion granulation was carried out [through a 1 ml LISml screen and dried to obtain a granular carrier.

92.93 parts of this granular carrier containing MO-358 was placed in a mixer and while mixing, 7 parts of bentiocarb was added.

A mixed solution stock solution of α07 parts of compound (1) is added and adsorbed.

Example 2 (Granules) 20 parts of bentonite, 5 parts of talc, 7 parts, diatom ±1
After mixing and pulverizing 0 parts of sodium alkylbenzenesulfonate, 3 parts of sodium alkylbenzene sulfonate, and 8 parts of Bilasiredo, water was added, kneaded, and dried through a tOW screen in an extrusion granulation method to obtain a granular carrier.

92.95 parts of this virazolate-containing granular carrier is placed in a mixer, and while mixing, a mixed stock solution of 7 parts of bentiocarb and 07 parts of compound (1) α is added and adsorbed.

Example 3. (Granules) 8 parts of Birashiredoa in the composition of Example 2 was added to MT-10.
Benthiocarb, MT which has the target blending ratio by setting 1111 parts and 58.7 parts of talc to 55.4 parts.
A mixture of -101 and compound (1) can be prepared.

Example 4. (Granules) 40 parts of bentonite, 54.5 parts of Merck, 5 parts of white carbon, sodium alkylbenzenesulfonate α5
After mixing the parts, water is added, kneaded, and dried through a tOR11 screen using an extrusion granulation method to obtain a granular carrier.

Put 918 parts of this granular carrier into a mixer and while mixing, add 7 parts of Bentocarb, 5 parts of IJ, and 2 parts of compound (2 parts).
) Add and adsorb 7 parts of the mixed solution.

Example 5. (Granules) Put 77.7 parts of the granular carrier obtained according to Example 4 into a mixer, and while mixing, add 10 parts of Benthiocarb, 15 parts of Tumetrif, 8 parts of MCPB α, and a mixed solution of 3110 parts of the compound. Adsorb.

Examples & (Granules) 50 parts of bentonite, 7 parts of clay 4a, 10 parts of diatomaceous earth
parts, sodium alkylbenzenesulfonate α5 parts, sodium ligninsulfonate 3 parts.

After mixing and pulverizing 7.8 parts of Basagutsun, water is added and kneaded, followed by drying through a tOwII screen using an extrusion granulation method to obtain a granular carrier.

90.8 parts of this granular carrier was placed in a mixer, and while mixing, 7 parts of Benthiocarb, 15 parts of Shiftrin, and Compound (4) α
Add and adsorb 7 parts of the mixed solution.

Example 2 (Granules) 30 parts of bentonite, 3 & 4 parts of clay, diatom ±20
7 parts of sodium alkylbenzenesulfonate, 5 parts of sodium ligninsulfonate.

A granular carrier is obtained by mixing and pulverizing 19 parts of Basagutun, adding water, kneading, extruding, and drying the mixture through an iQm screen.

75!2 parts of this granular carrier was placed in a mixer, and while mixing, 10 parts of Benthiocarb and 0.8 parts of MCPB were added.

A mixed solution of the compound (111Q parts) is added and adsorbed to obtain a product.

Similarly, a herbicidal composition having a desired compounding ratio can be obtained by changing the amount of Examples 1 to 7 and the ratio of active ingredients as required.

Example 8. (Emulsion) Benthiocarb 35 parts, shift 9 fufu, 5 parts, compound +
11 An emulsion is prepared by mixing and dissolving 65 parts of α, 5 parts of alkyl alisulfate (surfactant), 5 parts of polyoxyethylene alkyl allyl ether, and 4115 parts of xylene.

Example 9 (Wettable powder) 21 parts of Benthiocarb was mixed with 15 parts of white carbon, and this was mixed with K MO-5s e 1. Part a, compound (4
) Add 21 parts. Furthermore, as a wetting agent, clay 22 was added as a wetting agent (1 part 5 parts sodium alkylbenzenesulfonate).
1 part, mix and grind to obtain a powder.

Example 1α (Powder) 35 parts of penthiocarb was mixed with 2 parts of white carbon, and 15 parts of MT-10, 55 parts of the compound (31cL,
40 parts of clay and 5,115 parts of Merck were added, mixed, and ground to obtain a powder.

Claims (1)

[Claims] (IIS-(4-chlorobenzyl) N,N-diethylthiol carbamate and 4-chloro-2-methylphenoxybutyric acid ethyl ester, 5-isoglobyl-IH-2
, 1,5-benzothiadiazinone-(4)-5H-one-2,2-dioxide, 4.6- )dichlorophenyl-41-nitrophenyl ether, 4-(2,4-
dichlorobenzoyl)-1,3-dimethylpyrazole-
5-yl-P-)luenesulfonate, 2-(2-su7
Toxy)-propionanilide and 2-methylthio-4
, 6-bisethylamino-S-triazine or two
1. A herbicidal composition characterized by containing at least one herbicidal active ingredient, and one type of benzenesulfonyl compound or s7tylsulfonyl compound represented by the general formula. The blending ratio of (218-(4-chlorobenzyl)N,N-diethylthiol carbamate, 2.4.6-)dichlorophenyl-4-nitrophenyl ether, and benzenesulfonyl compound or naphthylsulfonyl compound is 7 by weight. The herbicidal composition according to claim 1, characterized in that the herbicidal composition is in the range of :6:7 to a.07. (3) 8-(4-chlorobenzylon N,N-diethylthiol carbamate and 4-(2,4-dichlorobenzoyl)1j?dimethylhyyy-ru-5-yl-P-
The blending ratio of toluene sulfonate and hibenzenesulfonyl compound or 7-tylsulfonyl compound is 7:
7:7°n' (4) 8-(4-chlorobenzyl)N,N-diethylthiyl carbamate and 2-(2-7toxy)-propionanilide and benzenesulfonyl compound or 7
2. The herbicidal composition according to claim 1, wherein the blending ratio with the tyrsulfonyl compound is within the range of 7:10 to α07 by weight. The blending ratio of (518-(4-chlorobenzyl) N,N-diethylthiol carbamate and 2-methylthio-4,6-pisethylamino-8-)riazine and benzenesulfonyl compound or naphthylsulfonyl compound is 7 by weight. : 15:(6)8-(4-chlorobenzyl)
N,N-diethylthiol carbamate, 2-methylthio-4,6-pisethylamino-S-F riazine and 4
-Herbicide composition based on chloro-2-methylphenoxybutyric acid. (7) 8-(4-chlorobenzyl)N,N-diethylthiol carbamate, 2-methylthio-4,6-bisethylamino-S-)riazine, and 3-isopropyl-
I H-2,1,3-benzothiazinone-(4) -5
Claim 1, characterized in that the blending ratio of H-one-2,2-dioxide and the benzenesulfonyl compound or the 7-tylsulfonyl compound is in the range of 7:t5 to α07 by weight. herbicide composition. (8) 8-(4-chlorobenzyl)N,N-diethylthiol car-(mate and 4-chloro-2-methylphenoxybutyric acid ethyl ester and 5-isopropyl-I H-
2,1,5-Benzothiadiazinone-(4)-5H-
The blending ratio of 1-2,2-dioxide and a benzenesulfonyl compound or a 7-tylsulfonyl compound is by weight,