KR800000648B1 - Herbicidal composition - Google Patents

Abstract

Herbicidal compd. contg. S-benzyl-N, N-dialkylthiol carbamate≮I; R = alkyl, X = halogen, methyl≉andphenoxy conpd., salt, ester of 2-methylthio-4,6-bisalkylamino-s- triazine of II was prepd. Thus, mixt. of s-(p-bromobenzyl)-N-N-dimethylthiol carbamate 5 % 2-(2-methyl-4,-chlorophenoxy)propionicacid aryl ester 1 %, 2-methylthio-4 ,6-bis-ethylamino-s-triazine 1 %, lognin sodium sulfonate 2 %, white carbon 5 % and bentonite 86 % knead with water, dried and granulated to give title compd. of 14-32 mesh.

Description

Herbicide composition

The present invention relates to S-benzyl-N, N-dialkylthiol carbamate of the general formula (I) and a phenoxy compound of the general formula (II), salts or esters thereof, and 2-methylthio-4, A herbicidal composition comprising a mixture with 6-bisalkylamino-S-triazine as an active ingredient.

Where

R is an alkyl group,

R ′ is an alkylene group,

X is a halogen atom or a methyl group,

X 'represents a chlorine atom or a methyl group.

An object of the present invention is to control various perennial weeds such as wild grasses, etc. that occur in paddy fields, yearly weeds such as ox bone, perennial weeds such as snares and geumbangdongi, without causing harm to rice fields. It can be applied to the control of perennial weeds such as wild grasses such as wild grass, barley, weed, broadleaf weeds such as estuaries, and mallow wine, and Geumbangsanyi. The present invention provides a safe herbicide composition that does not harm useful crops. Therefore, the herbicide composition of the present invention is to control almost all herbaceous plants of annual weeds, and is effective against perennial weeds and enhances stability against useful crops.

In rice fields, weeds occur at the beginning of development, that is, about two weeks after planting at the time of harvesting, and this time is the agricultural season, which is out of reach of weed control. In addition, various herbicides currently on the market are effective in the early stages of weed development, but after 10 days of weeding, the herbicidal effect is poor and almost no purpose of weeding can be achieved.

Carbamate-based compounds, urea-based compounds, triazine-based compounds and the like are used for weed control in the field. However, weeds in the field may be removed due to problems such as moisture in the soil, types of weeds, types of crops, and the like. It was impossible to control completely.

As such, there is no known herbicide to meet this need. In addition, because of labor shortage in agriculture and reasonable labor distribution at the time of planting, we control of weed which occurs at all time as one treatment, that is, wide range of processing period and herbicide to control weed of field correctly An appearance is desired.

However, the herbicide composition of the present invention is one that can sufficiently satisfy these requirements.

S-benzylthiolcarbamate used in the present invention is excellent in the control effect against pollen and weeds, such as wild grass, chaff bone. In other words, when used at the beginning of the development, the use of 500g or more per 10 are used to control the hulls and cow bones, but among the annual grass species, especially perennials such as broadleaf or jinbangdong, such as larvae, myeongju, hair agar The effect on weeds is weak.

In addition, when you use it for a field, you must use a considerable quantity of medicine. On the other hand, the phenoxy clock compound having a plant hormone action is absorbed from all parts of the plant, such as the roots, stems and leaves of the weeds and exhibits a herbicide action. That is, by spraying the stem or leaves with a concentration of 100-1,000 ppm to the weeds that have already been generated, after 1 week of spraying, the cells are killed with acrosis (cell death). In the former case, the treatment of weeds can be completely suppressed by treating 50 g or more as an active ingredient per 10 ares on the surface of the suspended soil, but the selectivity between weeds and useful plants is narrow and always weak. In addition, 2-methylthio-4,6-bisalkylamino-S-triazine is a well absorbed herbicide and kills weeds or inhibits germination by photosynthesis inhibition. In addition, the width of the treatment bandit observed by weed leaf age shows a high effect at the beginning of the first stage of germination during germination, but weak herbicidal effect after the third leaf stage, and at high temperatures. Sometimes rice planted in rice fields and rice planted in fields There are times when it is harmful to useful crops such as etc. In addition, in the field, a very large amount must be treated at more than 200 g per 10 ares.

In addition, the present inventors have conducted various studies to overcome the drawbacks of S-benzylthiolcarbamate, and as a result, herbicide composition S-benzylthiol by mixing S-benzylthiolcarbamate and a phenoxy compound The herbicide composition by mixing carbamate and 2-methylthio-4,6-bisalkylamino-S-triazine was clarified, but the former was changed by the effect of S-benzylthiol carbamate and phenoxy compound. It is now possible to control all herbaceous plants of broad-leaved, broadleaf, and perennial weeds, but in rice fields, the prevailing Olme is less effective, and there are times when the rice germinates.

Even in the latter case, all herbaceous flowers, broadleaf, and perennial weeds can be controlled. However, as in the former, the effect is weak against thick-leaved weeds such as snares, and at high temperatures, weaknesses may occur.

As a result of various studies in consideration of the above, it is possible to overcome the above-mentioned shortcomings, to control almost all rice weeds, and to prolong the treatment time significantly, and to prevent the control of Olme, which was difficult to control in the past. Enabling is very significant. In addition, in the field, it has been found that herbicide compositions that can significantly reduce the amount of the drug, and that the beta-banging property controls the perfume, and are advantageous economically. Examples of the S-benzyl thiol carbamate-based compound include S- (P-bromobenzyl) -NN-dimethylthiolcarbamate (hereinafter referred to as BMC) and S- (P-chlorobenzyl) -N, N-dimethylthiol Carbamate (hereinafter referred to as CBEC) and S- (P-methylbenzyl) -N, N-diisopropylthiolcarbamate (hereinafter referred to as MBIC). The phenoxy compound is 2,4-dichlorophenoxy. Acetic acid (hereinafter referred to as 2,4-D), 2- (2-methyl-4-chlorophenoxy) propionic acid (hereinafter referred to as MCPP), 2-methyl-4-chlorophenoxy butyric acid (hereinafter referred to as MCPB), etc. Salts or esters of 2-methylthiol-4,6-bisalkylamino-S-triazine, 2-methylthio-4,6-bis-ethylamino-S-triazine (hereinafter referred to as MES), 2-methylthio-4, 6-bis isopropylamino-S-triazine (henceforth MIS) is mentioned.

S-benzyl thiol carbamate, phenoxy-compound and triazine-based compound of the active ingredient of the present invention is not to mention that the mixed dose is significantly reduced than when used in each step, the most preferred mixing range The ratio of S-benzylthiolcarbamate: phenoxy compound: triazine compound is 1: 0.01-0.3: 0.01-0.5 by weight ratio, and the amount of 10-argase varies depending on the field or crop condition to be controlled. If you use a mixture of 50-300g: 10-60g: 10-70g and about 100-500g: 20-120g: 20-140g in the field, you can get good results.

나 헬리콥터 등을 사용하여 균일하게 산포하여 사용한다. 수화제일 때에는 규조토 등의 담체, 알킬 벤젠설폰산나트륨 등의 활성제를 배합하여 수화제를 제조하고, 물, 모래 등으로 희석하고 살포한다. 또, 유제일 때에는 톨루엔, 키실렌, 메틸나프탈렌, 알코올류, 시클로헥사논, DMF, DMSo 등의 용제, 폴리옥시에틸렌 등의 알킬아릴에테르, 디나프틸메탄 디설폰산칼슘 등의 활성제를 배합하여 유제를 제조하고, 물로 희석하여 살포한다. 물론, 필요하다면 다른 살충제, 살균제 또는 제초제와 혼합할 수도 있다.When the composition of the present invention is used in rice fields, it is most effective to formulate granules. That is, it is expanded using bentonite, clay, talc, limestone, and the like, added with a binder such as sodium alkylbenzenesulfonate, polyvinyl alcohol, sodium lignin sulfonate, kneaded with water, extruded and dried, and dimethylformamide Granular diatomaceous earth, permercite or mineral fine powders such as bentonite, talc, diatomaceous earth, clay, limestone, etc., dissolved or not dissolved in a suitable solvent, such as sodium alkylbenzenesulfonate, polyvinyl alcohol, sodium lignin sulfonate, etc. The binder is added, kneaded with water, extruded, dried, and evenly adsorbed to the desired particle size. The granulation is carried out by hand or granulator.

Use it evenly by using a helicopter or the like. In the case of a wetting agent, a carrier such as diatomaceous earth and an activator such as sodium alkyl benzene sulfonate are blended to prepare a wetting agent, diluted with water, sand and the like and sprayed. In the case of an emulsion, an oil agent is prepared by blending an active agent such as toluene, xylene, methylnaphthalene, alcohols, solvents such as cyclohexanone, DMF, DMSo, alkylaryl ethers such as polyoxyethylene, and dinaphthylmethane disulfonate. Prepared, diluted with water and sprayed. Of course, it can also be mixed with other pesticides, fungicides or herbicides if necessary.

Next, an Example is given and demonstrated about compounding. Where% represents weight percentage.

Example 1: granulation

BMC 5%, MCPP aryl ester 1%, MES 1%, sodium lignin sulfonate 2%, white carbon 5%, bentonite 86% was mixed and ground uniformly, kneaded with water and assembled in an extruder, It is dried, it is made into 14-32 mesh, and it is granulated.

Example 2: Granulation

CMES 5%, MCPB ethyl ester 0.8%, MIS 1.3%, bentonite 48%, clay 44.4%, sodium alkylbenzenesulfonate 1%, polyvinyl alcohol 0.5% uniformly mixed and pulverized, kneaded with water and extruded granulator The granules were then granulated, dried, sieved to 14-32 mesh, and granulated.

Example 3: Granulation

MBIC 7%, 2,4-D-sodium salt 1.5%, MES 1%, bentonite 40%, clay 46%, alkylbenzenesulfonate 2%, sodium lignin sulfonate uniformly mixed and ground, It is added, kneaded, granulated as an extruded granulator, dried, and granulated to 14-32 mesh.

Example 4 granulation

BMC 7%, MCPB 1%, MES 2%, calcium bicarbonate 40%, clay 46.5%, sodium alkylbenzenesulfonate 1.5%, sodium lignin sulfonate 2% uniformly mixed, kneaded with water and kneaded The granules were then granulated, dried and sieved to 14-32 mesh to form granules.

Example 5 granulation

CBEC 7%, MCPP amine salt 1%, MIS 1.5%, clay 40%, alkyl benzene sulfonate calcium 1.5%, bentonite 48.5%, polyvinyl alcohol 0.5%, mixed with a mixture of water and kneading, as an extruder granulator After granulation, it is dried, it is made to be 14-32 mesh, and it is granulated.

Example 6 granulation

5% of MCPB ethyl ester dissolved in 5 times (weight ratio) DMF, 5% of MBIC, and 1% of MES were mixed and dissolved, and then uniformly dissolved into 8-32 mesh of granular diatomaceous earth ± 90%. Absorb it into granules.

Example 7 Hydration

MBIC 40%, 2,4-D ethyl ester 10%, MIS 10%, sodium alkylbenzenesulfonate 2%, sodium lignin sulfonate 2%, white carbon 10%, diatomaceous earth 26%, and mixed with a hydrating agent do.

Example 8 Emulsion

CBEC 30%, MCPB ethyl ester 6%, MIS 10%, xylene 39%, polyoxyethylene alkylaryl ether 12%, and calcium disnaphthyl methane disulfonate 3% are mixed and dissolved to obtain an emulsion.

Example 9 Powder

BMC 7%, MCPB 1%, MES 1.5%, and 90.5% of an even mixture of diatomaceous earth and clay are mixed and ground to obtain a powder. Next, the effects of the present invention will be described in detail with reference to experimental examples.

[Experimental Example (1): Soil Treatment Test Before Germination in Field]

Fill a 800 cm ² polyethylene pot with a field soil (Alluvial Soil), and sow seeds of various publicly available weeds. Then, the soil was subjected to light earthquake suppression, and the hydrating agent prepared according to Example 7 was diluted with water to a predetermined concentration, and sprayed at a rate of 100 liters per 10 liters. After treatment, they were placed in a greenhouse and the pot was always kept in the state of a bar and examined by observation 30 days after the treatment. The results are shown in the first table.

However, 5 in the table is a complete test, 4 is more than 80% killing power.

3 shows 50-80% killing power.

2 represents 20-50% killing power.

1 indicates less than 20% killing power.

0 indicates no effect.

[Table 1]

[Experiment (2): Herbicide test in vegetable garden]

The vegetable garden was plowed and raised on May 20, and divided into 4 m ² per stop, and it was implemented as a double flame retardant.

Thereafter, the starting material was seeded to a length of 2-3 cm, and the hydrous prepared immediately according to Example 7 was diluted with water to a predetermined concentration, and the drug was treated at a rate of 100 ml per 10 parts.

The investigation was carried out according to the indication of the effect of Experimental Example 1 by observation on June 20.

The results are shown in the second table.

[Table 2]

Experimental Example (3): Herbicide Test in Transplanted Rice Fields

Rice seedlings were harvested on June 10, and the rice paddies were divided into 1 piece 5m ² and tested in fresh water with 1 drug diuretic. After transplantation, the prescribed dose of granules prepared according to Example 3 was treated on June 25, and the herbicidal effect was investigated on July 25 after the treatment. According to the display of the test example (1) of the result, it displays in a 3rd table | surface.

[Table 3]

[Experimental Example (4): Effect on the tadpoles of the tadpole advanced

Rice seedlings were harvested on June 11 in paddy fields where tadpoles had higher priority, and the rice paddies were divided into 5 m ² per plot and tested in two-drug, fresh water. After transplantation, a predetermined amount of granules irradiated in accordance with Examples was treated on June 26, and the herbicidal effect was examined on July 26 after treatment. The indication of the result follows the indication of 1 in the experiment, and the result is shown in the fourth table.

[Table 4]

[Experiment (5): Lame control test by late treatment]

The rice field, which has a high number of snares, was selected, and mechanically transplanted the three-leaf ricefield active hairs on June 5 after harrowing was stopped. After transplanting, the rice paddies were partitioned into 1 sphere 5m ² , and the granules were treated with fresh water as a single drug retardant. The treatment was carried out on June 27, 22 days after transplantation, and the drug was prepared in granules according to the examples together with each mouth, and a predetermined amount was added thereto.

The snare at the time of treatment reached 6-7 leaf stage. The herbicidal effect was compared to the remaining amount of the herb after extracting a snare in 50 × 50 cm of the center of each test zone on September 6, 40 days after the treatment.

The results are shown in Table 5.

[Table 5]

Claims (1)

S-benzyl-N, N-dialkylthiol carbamate of the following general formula (I), a phenoxy compound of the following general formula (II), a salt thereof and 2-methylthio-4,6-bisalkylamino-S -The herbicide composition which comprised the triazine compound in the ratio of 1: 0.01-0.3: 0.01-0.5.

Wherein R is an alkyl group, R 'is an alkylene group, X is a halogen atom or a methyl group, X' is a chlorine atom or a methyl group.