JPS61233604A - Herbicide composition - Google Patents

Abstract

PURPOSE:To provide the titled composition containing a pyrazolesulfonylurea dericative and S-benzyl-N-ethyl-N-(1,2-dimethylpropyl)-thiolcarbamate, etc., having synergistic activity and capable of selectively and completely controlling the objective weeds at a low rate of application. CONSTITUTION:The objective herbicide composition contains (A) a pyrazolesulfonylurea derivative of formula (A is alkyl; B is H, alkyl, halogen or alkoxy; R is alkyl; X and Y are alkyl or alkoxy; Z is CH or N) and (B) S-benzyl-N-ethyl-N-(1,2-dimethylpropyl)-thiolcarbamate or S-benzyl-N-di-n- propyltiolcarbamate. The amount of the compound of formula is preferably 0.001-50 pts. wt., especially 0.001-10 pts. wt. per 1 pt. wt. of the compound B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the general formula (I): [In the formula, A represents a lower alkyl group. B represents a hydrogen atom, a lower alkyl group, a halogen atom, or a lower alkoxy group. P represents a lower alkyl group. X and Y each independently represent a lower alkyl group or a lower alkoxy group. 2 represents a C11 group or a nitrogen atom. ] pyrazolesulfonylurea derivative and S-hensyl-N
-ethyl-N-(1,2-dimethylpropyl)-thiol carbamate (hereinafter referred to as compound A) or S-benzyl-N-di-n-propylthiol carbamate (
The present invention relates to a herbicidal composition containing any one of the following (hereinafter referred to as compound B) as an active ingredient.

A wide variety of herbicide research and development over many years /r
As herbicides have been put into practical use, these herbicides have focused on the 5KI (labor saving in weed control work and productivity of agricultural and horticultural crops).Even today, there is a demand for the development of new herbicides with better weed control properties. , especially as a G remover for agriculture and horticulture, 4:I:
, i, 'j, It is desirable that the target Xf grass can be selectively controlled with the herbal medicine M, as it is unlikely to cause phytotoxicity to cultivated crops, but existing drugs do not necessarily meet this requirement 1. It wasn't a joke.

-・General r (The compound represented by (1) is used as a conventional debt relief agent.
tL has a weeding effect of 1y at a low dose (J, and has a high safety level of 1.1 in rice plants. It also shows a small effect on 11 miscellaneous ηl of -year-old rice and -year-old broad-leaved weeds. It also shows strong efficacy against perennial JFT grass, and its usefulness is number 1.

The compound △J-Yuyo and the compound BLJ Nohie are used at a higher drug dose than the compound represented by the general formula (1) against annual weeds, but as a result, these drugs can be used to control rice fields.
This has led to an increase in perennial jiff, 47j, and improvements are desired.

The present inventor, En, conducted research to increase the herbicidal effect of the compound represented by the general formula (1), and found that the compound represented by the general formula (1)
The present invention was completed by discovering that when Compound A or Compound B is blended with the compound represented by the formula, not only the respective agronomic effects are obtained additively, but also a synergistic herbicidal effect appears. This synergistic effect is large, and the composition of the present invention does not cause any phytotoxicity to rice;
- The present invention is extremely useful as it can completely control both annual and perennial weeds. In particular, the synergistic herbicidal effect on barnyard grass is extremely useful.

Furthermore, the herbicidal composition of the present invention is effective even when treated before and after weed germination, and high effects can be obtained even when treated with soil or when treated with grass and soil. It is also useful for various grains other than rice, and can also be used to control various weeds in agricultural and horticultural fields such as fields and orchards, as well as in non-agricultural areas such as playgrounds, vacant lots, forest areas, tank yards, and railway edges. applicable,
Shows great economic effect in weed control.

Compositions according to the invention also have the relative activity of each component, J.
or - Generally, the compound represented by the general formula (1) is added to 0.001 to 50 parts by weight of compound A or compound (131 parts by weight).
It contains 0.001 to 10 parts by weight, preferably 0.001 to 10 parts by weight.

However, the amount of the mixture depends on a number of factors, such as the type of plant to be filled and the amount of time the growth should be adjusted. Appropriate. A person skilled in the art can easily determine an appropriate usage rate using a standardized ordinary test I without performing a large number of experiments.

Preferably, the active ingredient is used in the form of a composition in which the active ingredient is mixed with a carrier consisting of a solid or liquid diluent. Preferably, the composition further comprises a surfactant.

Next, Table 1 shows representative examples of the compounds represented by the general formula (1) according to the present invention. The following compounds have general formula (I)
Is it included in the compound represented by -fr?
The compounds represented by formula (1) are not limited to these.

Table 1 Medimethyl)l;:[:t:Ethyl group Individual active compounds 31 In many cases, their herbicidal activity shows some drawbacks, but in such cases, two types of active compounds are combined. The elimination activity in case of blindness is 11 of the activity of each of the two types of compounds.
1. When the pure aguchi (3! JI retained activity), [, Reno) increases, this is called synergism. The expected activity of a specific combination of two herbicides/U can be calculated as follows.

(Colby S, R, 51 Calculations of Synergistic and Antagonistic Reactions of Herbicide Combinations-U Weed,, I Vol. 15, 20
~22, 1967) (χ: aKg of herbicide A)
1/11 control rate β when treated at an amount of /ha: Suppression rate E when treated with herbicide B at an amount of bKg/ha: aKg/ha of herbicide A, bkg/ha of herbicide B
If the inhibition rate maintained by 101 when treated with an amount of 101, that is, the actual inhibition rate is greater than the calculated value of −1−, then it can be said that the activity by the combination exhibits a synergistic effect.

Hereinafter, the present invention will be explained in more detail with reference to Examples.
The compounds, dosage amounts, dosage forms, etc. in the present invention are not limited to the examples.

In addition, all "parts" mean parts by weight.

Example 5 - Granules Compound Na1 --- 0.07 parts Compound A --- 7 parts Hentonite
--- 50 parts of talc --- 42.93 parts or more are mixed uniformly) After crushing, add a small amount of water, mix and knead, granulate with an extrusion type granulator, and dry to form granules. Make it.

Osamu Mata/Example-? - Granule Compound Moving Tooth 2 -------0.05 parts Compound A ----10 parts Hetonite
~ --50 parts of talc 39.95 parts or more are uniformly mixed and pulverized, then a small amount of water is added, stirred and kneaded, granulated with an extrusion granulator, and dried to form granules. .

Example of sacrilege? - Granule Compound No. 3 - (1,03 parts Compound A'---11-6 parts Hentonite
----- Medium-43,97 parts talc
--1=-, 50 parts or more are uniformly mixed) After crushing, a small amount of water is added, stirred and kneaded, granulated with an extrusion type granulator, and dried to form granules.

Promotion example - 4 - Granule compound moving tooth 4 =--~------0,] parts association substance --- 8 parts hentonaite --- 41,9 parts talc 50 parts uniformly
■L ↑ 5) Crush, add ice of raw h↓, stir, mix and knead, crush with extrusion type crusher (roller), and dry to make granules.

Example: 1 ton of RL agent compound, 5 0.07 parts Compound A - 9 parts Night - 50 parts Talc
After 40.93 parts or more are uniformly mixed and pulverized, a small amount of water is added and the mixture is stirred and mixed to 1p, granulated using an extrusion granulator, and dried to form granules.

Cylinder "1 example" G Granule Compound No. 6 --- 0.05 part Compound B
-6 parts Hentonai 1~--28.95 parts Talc
- (Mix 15 parts or more evenly) Crush and add a small amount of water) Stir gently to soften, extrusion method) do.

O Combination Example Yu li:L 11 Compound No., 7 0.03 part fj
Item B 5 parts-\Toni 1.
, , , , , , - , , 25 parts talc --, 69,97 parts or more are mixed and crushed uniformly, then a small amount of water is added and stirred ↑ 1: Mix and soften, press 7
It is granulated using a dispensing type granulator, dried and made into granules.

Blend In II, Ej-Grain Compound No. 8 ----0.07 part Compound I
3 ---- 7 parts hentai 1 ----------20 parts talc
--- 72.93 parts or more''-- is crushed, then a small amount of water is added, stirred and kneaded, granulated using a push-out granulator, and dried to form granules. Make it.

Formulation - Example - 9 - Granule compound moving teeth! 1 -- 0, 1 part compound r3
-111---Part 7 Hentai l
−−−−−20 parts talc −−−−−−
---After uniformly mixing and pulverizing 12.9 parts or more, adding a small amount of water, stirring and kneading, and granulating with an extrusion granulator,
Dry and make into granules.

Treatment - (YuCi granule compound 1tio, 10 ------- 0
．． Part 05 Compound B ----------------------8
part hentonite --------50 parts talc
------- 41.95 parts or more are uniformly mixed and pulverized, then a small amount of water is added, stirred and kneaded, granulated with an extrusion granulator, and dried to form granules.

Distribution H Masuzuki 1 Granule compound moving tooth 15 --------- 0.2 parts Compound B --- 8 parts Hen I/Nyl --- 40 parts Talc =--
---After uniformly mixing and pulverizing 51.8 parts or more, adding a small amount of water, stirring and kneading, and granulating with an extrusion type granulator,
Dry and make into granules.

Formulation Example 12 Granule Compound No. 17 - 0.15 parts Compound ■ 3 - - 1 - - 6 parts /\n 1 Lee] - - 50 parts Talc - 1 - - 43.85 parts or more - were uniformly mixed and pulverized. After that, add a small amount of water and stir for 1n.
Then, it is made into granules using an extrusion granulator and dried.

Test Examples, 1- Weeding effect test under flooded conditions After putting alluvial soil in a 115,000 are Wagner Bosoto, water is added and mixed to create a freshwater condition with a water depth of 2 cm. Japanese millet, broad-leaved weeds (Japanese azalea, azalea, kikasig!
)) Seeds of each species of firefly were mixedly sown in the bots described above, and tubers of urikawa, cypress, and black bream were also placed on the bed. Furthermore, I2Ki at the 2.5-leaf stage was transplanted.

Grow plants in pots in a greenhouse at 25 to 30°C,
Ten days after sowing, when the Japanese millet was at the 1.5-leaf stage, a diluted solution of the drug was dropped onto the water surface using a volumetric pipette in a predetermined amount. Three weeks after dropping the chemical solution, the herbicidal effect on various weeds was investigated according to the following criteria.

The results are shown in Tables 2 and 3.

Judgment Criteria 5- Weed killing rate 90% or more (almost complete death) 4-
Weed killing rate 70-89% 3- Weed killing rate 40-69% 2- Weed killing rate 20-39% ■ - Weed killing rate 5-19% 〇 - Weed killing rate 5% or less (hardly effective) However,
The above-mentioned weed killing rate was determined by measuring the weight of above-ground grass in the chemically treated plot and the weight of bipartite grass in the non-treated plot using the following formula.

Table 2 Table 3 (continued) Table 3 (continued) Table 3 (continued) Table 3 (continued) Table 3 (continued) Table 3 (continued) Example of canter -? - Synergistic effect test on barnyard millet A polyethylene container with an inner diameter of 8 cm was filled with water ITI soil, and the common millet was grown in a paddy field. I did.The bot is 25~
The barnyard grass was grown under control in a greenhouse at 30°C, and the residual weight of millet plants was measured for 30 days after treatment.The weight of some fresh grass and the growth of above-ground parts in the untreated area were measured. It was calculated and judged according to the following criteria. The results are shown in Tables 4 and 5.

Score Weed killing rate 0 0-9% 1 10-19% 2 20-29% 3 30-39% 4 40-49% 5 50-59% 6 60-69% 7 70-79% 8 80-89% 9 90 ~99% 10 100% Margin below Table 4 Table 4 (continued) Table 4 (continued) Margin below Table 5 Table 5 (continued) Table 5 (continued) Table 5 (continued) Table 5 ( (Continued) Table 5 (Continued) In the table, the calculated values indicate the expected values obtained from the Colby equation.

Z As is clear from the above table, the composition of the present invention exhibits not only the simple sum of the activities of the compound represented by general formula (1) and the conventionally known herbicides, but also a greater synergistic herbicidal activity. Furthermore, target weeds can be selectively and completely controlled with a low dose.

Claims (1)

[Claims] General formula (I): ▲There are numerical formulas, chemical formulas, tables, etc.▼(I) [In the formula, A represents a lower alkyl group. B represents a hydrogen atom, a lower alkyl group, a halogen atom, or a lower alkoxy group. R represents a lower alkyl group. X and Y each independently represent a lower alkyl group or a lower alkoxy group. Z represents a CH group or a nitrogen atom. ] A pyrazolesulfonylurea derivative represented by and either S-benzyl-N-ethyl-N-(1,2-dimethylpropyl)-thiol carbamate or S-benzyl-N-di-n-propylthiol carbamate as active ingredients. A herbicide composition comprising: