JPS61218503A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition, containing a specific pyrazolesulfonylurea derivative and one of glyphosate, glufosinate or bialaphos in combination and capable of completely controlling various weeds in a small amount of chemicals by the synergistic effect thereof. CONSTITUTION:A herbicidal composition containing a pyrazolesulfonylurea derivative expressed by the formula (A is lower alkyl; B is H or lower alkyl; R is lower alkyl; X and Y are lower alkyl or lower alkoxy) and one of N- phosphonomethylglycine (abbreviated to glyphosate), ammonium (3- aminocarboxypropyl)-methyl phosphinate (abbreviated to glufosinate) or (2- amino-4-methylphosphinobutyl)alanylalanine (abbreviated to bialaphos) as active constituents. Preferably, 0.001-10pts.wt., based on 1pt.wt. latter, compound expressed by the formula is incorporated in the composition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the general formula (■): The middle angle in the formula C represents a lower alkyl group. B represents a hydrogen atom or a lower alkyl group. R represents a lower alkyl group. X
and Y each independently represent a lower alkyl group or a lower alkoxy group. ] Pyrazolesulfonylurea derivative represented by and N-phosphonomethylglycine (hereinafter referred to as glyphosate).
, ammonium-(3-aminocarboxyprobyl)-
Methylphosphinate (hereinafter referred to as glufosinate).

) or (2-amino-4-methylphosphinobutyryl)alanylalanine (hereinafter referred to as bialafuos) as an active ingredient.

As a result of many years of research and development into herbicides, a wide variety of herbicides have been put into practical use, and these herbicides have contributed to labor-saving weed control operations and improved productivity of agricultural and horticultural crops. Even today, there is a demand for the development of new drugs with better herbicidal properties.

The compound represented by the general formula (1) has excellent herbicidal effects at a very low dose compared to conventional herbicides, but the present inventors
As a result of conducting research to increase the herbicidal effect of the compound represented by the general formula (1), it was found that when the compound represented by the general formula (1) is blended with the conventionally used herbicide,
The present invention was completed by discovering that the herbicidal effects of each species are not only additive, but also synergistic.

This synergistic effect is great, and the composition of the present invention can completely control both annual and perennial weeds with a low dose, making the present invention extremely useful.

The herbicide composition of the present invention is effective even when treated before and after weed germination, and is highly effective when treated in soil or in foliage and soil treatment. It can also be applied to control various weeds in agricultural and horticultural fields such as fields and orchards, as well as non-agricultural lands such as playgrounds, vacant lots, forest areas, tank yards, and railway edges, and shows great economic effects in weed control.

The composition according to the present invention generally contains 0% of the compound represented by the general formula (1) per part by weight of glyphosate, glufosinate or pialaf ox, depending on the relative activity of each component.
．． 0001 to 50 parts by weight, preferably 0.001 to 10 parts by weight. In many cases, the greatest advantage of the combined herbicides of the invention is when the proportion of compounds of formula (I) is relatively low compared to other herbicides, e.g. The compound represented by 1) is 0.001 to 0.1
Obtained when parts by weight.

The amount of mixture to be applied will depend on a number of factors, such as the particular species of target plant to be inhibited, but in general amounts from 0.00 to 10 Kg/ha are usually suitable. Those skilled in the art can readily determine appropriate usage rates by routine, standardized tests without the need for extensive experimentation.

The compositions of the invention are preferably 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 (I) in the present invention. Although the following compounds are included in the compounds represented by the general formula (1), they are also included in the compounds represented by the general formula (1).
The compounds represented by I) are not limited to these.

In many cases, the individual active compounds shown in Table 1 exhibit drawbacks in their herbicidal activity, but in such cases, the herbicidal activity of the combination of two active compounds is simply When the total activity is greater than the expected activity, this is called synergism. The expected activity of a particular combination of two herbicides can be calculated as follows.

(Colby S, R, Calculation of synergistic and antagonistic responses of herbicide combinations rWeedJ vol. 15, pp. 20-22, 1
967) α: Inhibition rate when herbicide A is treated at a Kg/ha amount β: Suppression rate when herbicide B is treated at bKg/ha amount E: Herbicide A is aKg/ha , herbicide B bKg/ha
If the expected inhibition rate, that is, the actual inhibition rate when treated with the above amount, is greater than the above calculation, it can be said that the combined activity 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.

Father Kanemasu Flowable Compound Volume 3 5 parts Glyphosate -・-・・・・−20 parts Ageliseal B −710-1 −−・・−10 parts (Nonionic surfactant: Kao Atlas ■Product name) Lunox 100
OC・---1---- 0.5 parts (anionic surfactant: Toho Chemical ■trade name) 1% rhodopol water
・---20 parts (thickener: Lone Boulin product name) Water ----44
, 5 parts or more are mixed uniformly to form a flowable agent.

y Gold spot main Flowable compound 8 ----------0.5 parts Glyphosate 25 parts Agelisil B-710--9.5 parts (non-ionic Surfactant: Kao Atlas ■Product name) Lunosox 1000
．． C-・・・・・・・・・0.5 parts (anionic surfactant: Toho Chemical ■trade name) 1% rhodobol water ・-・
-・-20 parts (thickener: Lone Boulin product name) water -11111・44.5
Mix uniformly at least 10 parts to make a flowable agent.

Kukinsho 1 Flowable Compound N[L6 1 part Glyphosate ・-・・-・-25 parts Ageliseal B-71
0・-・-・10 parts (Nonionic surfactant: Kao Atlas ■Product name) Lunosox 1000 C------
~-・-0.5 parts (anionic surfactant: Toho Chemical ■
Product name) 1% Rhodopol water ---------・2
0 parts (thickener: Lone Boulin product name) water
・Music - 43.5 parts ゛Mix the above ingredients uniformly to make a flowable agent.

y Kakumasuto Flowable compound! 113 2 parts glufosinate -------・-・・-23 parts Ageliseal B
-710・−・−10 parts (Nonionic surfactant: Kao Atlas ■Product name) Lunosox 1000C−・・−−
---0.5 parts (anionic surfactant: Toho Chemical ■
Product name) 1% rhodobol water ・・・−・・・ 2
0 parts (thickener: Lone Boulin product name) water
-Mix 44, 5 parts or more uniformly to make a flowable agent.

y Metal wheel 1 Flowable compound 4 1 part Glufosinate -------18 parts Agelisil B -710--10 parts (Nonionic surfactant: Kao Atlas ■Product name ) Runosox toooc...---0.5 parts (Anionic surfactant: Toho Chemical ■Product name) 1% Rhodobol water ---20 parts (Thickener: Lone Boulin product) noun) water
-・---～・Mix 50.5 parts or more uniformly to make a flowable agent.

Formulation Example 6 Flowable Compound Demon 8 2 parts Glufosinate ---23 parts Agelisil B-710 ---10 parts (Nonionic surfactant: Kao Atlas (411 brand name) Lunox 100
0 C-・-・・・・・0.5 part (anionic surfactant: Toho Chemical (product name: Co., Ltd.) 1% Rhodobol water
−・・−20 parts (thickener: Lone Boulin product name) Water ・−−−−−44,
Mix 5 parts or more evenly to make a flowable agent.

Kukitarae Flowable Compound 11h1 1 part Bialafosu - 35 parts Ageli Seal B
-710-...-5 parts, (Nonionic surfactant: Kao Atlas ■Product name) Lunox 1000 C----
−−・−・−・0.5 part (anionic surfactant: Toho Chemical brand name) 1% Rhodopol water −・−・−
14 parts (thickener: Lone Boulin product name) water
----------- 44. Mix 5 parts or more uniformly to make a flowable agent.

Sponsor: Flowable Compound Fish 7 5 parts Bealaf Male -------25 parts Ageliseal B-710--5 parts (Non-ionic surfactant: Kao Atlas ■Product name) Lunox 100OC・
−・−・・−−−−−0.5 parts (anionic surfactant: Toho Chemical ■trade name) 1% Rhodobol water −・−・
20 parts (thickener: Lone Boulin product name) water
---44.5 parts or more are mixed uniformly to make a flowable agent.

Test box for herbicidal effect by foliage treatment Put sterilized diluvial soil in a plastic box measuring 15 cm wide, 22 cm wide, and 6 cm deep, and sow seeds of wild grass, Japanese knotweed, foxtail grass, Japanese knotweed, Japanese knotweed, and morning glory in spots. The soil was covered with approximately 1.5 cm of soil. When each plant reached the 2-3 leaf stage, the active ingredient was uniformly sprayed on the stems and leaves so that the amount of the active ingredient was a predetermined amount. The chemical solution used for spraying was the flowable agent of the formulation example described above diluted with water and sprayed over the entire surface of the stems and leaves of various weeds using a small sprayer. Four weeks after spraying the chemical solution, the herbicidal effect on various weeds was investigated according to the following criteria. The investigation was conducted according to the following criteria. The results are shown in Tables 2 and 3.

Judgment Criteria Weed killing rate 0 0-9% However, the above weed killing rate was determined by the following formula by measuring the weight of above-ground plants in the chemically treated area and the weight of above-ground plants in the untreated area.

tt in untreated area! ! Table 2, Table 2, Table 2 - Continued In the blank table below, the calculated values indicate the expected values obtained from the Colby equation.

As is clear from the above table, the composition of the present invention has greater synergistic herbicidal activity than the simple sum of the activities of the compound represented by general formula (1) and the conventionally known herbicides. Furthermore, target weeds can be 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 or a lower alkyl group. R represents a lower alkyl group. X
and Y each independently represent a lower alkyl group or a lower alkoxy group. ] Pyrazolesulfonylurea derivative represented by N-phosphonomethylglycine, ammonium-(3-aminocarboxypropyl)-methylphosphinate or (2
-A herbicidal composition characterized by containing one kind of alanylalanine (amino-4-methylphosphinobutyryl) as an active ingredient.