CN101971804B - Fomesafen and clethodim weedicide for soybean fields - Google Patents

Abstract

The invention relates to the technical field of weedicide for soybean fields, in particular to a fomesafen and clethodim weedicide for soybean fields, which comprises the following raw materials in percentages by weight: 10-15% of fomesafen, 10-15% of clethodim, 15-20% of dimethylformamide, 5-10% of stabilizer N-methyl diethanolamin, 5-10% of emulsifier and the balance of water. The fomesafen and clethodim weedicide is prepared by the following steps of: mixing the fomesafen and the dimethylformamide together; mixing the mixture with the clethodim and the N-methyl diethanolamin; mixing the water and the emulsifier together and stirring uniformly, and finally mixing with other raw materials and stirring uniformly. The invention has the advantages of improving the stability of the clethodim and avoiding the degradation of the clethodim, eradicating weeds in soybean fields completely at one time, having better prevention and control effect on single-cotyledon weeds and preventing killed weeds from regrowing; in addition, the invention also has the advantages of labor saving, time saving, money saving, low cost, simple process, farmer burden reduction, no harm to seedlings and no influence on yield.

Description

Fomesafen and clethodim soybean field herbicide

Technical field

The present invention relates to the soybean field herbicide technical field, particularly a kind of fomesafen and clethodim soybean field herbicide.

Background technology

According to " the use current situation and potential of northeast soybean field herbicidal "--" Shandong agricultural chemicals information " 07 phase in 2007, because the weed killer herbicide that uses at Soybean Field in recent years is mainly fomesafen, (essence) quizalofop-ethyl, Acetochlor, isopropyl methoxalamine, sethoxydim, chlorimuronethyl, clomazone, propisochlor etc., all be to prevent and treat grassy weed or control broad leaved weed, do not occur that product is double controls the whole weeds of Soybean Field, simultaneously because different weeds are different to the resistance ability of weed killer herbicide, field in for many years continuous chemical weeding, variation has occured in ruderal species population density and composition, such as spring soybean producing region acalypha copperleaf, dayflower, fiddleheads etc. rise to the difficult controlling weeds of main weeds, cause the cost of peasant's controlling weeds to rise year by year.

Fomesafen has preferably control efficiency to broad leaved weed, clethodim has preferably control efficiency to grassy weed, both are made up, enlarged the herbicide spectrum, prevent and kill off the grass family section weeds of Soybean Field and broad leaved weed, fiddlehead, perennial weed etc. comprehensively, can reach preferably herbicidal effect.

But after fomesafen and clethodim made missible oil or aqueous emulsion, clethodim can fast degradation, and under 36 ℃ of conditions, degradation rate 6% per month, had a strong impact on the result of use of intermixture.

Summary of the invention

The present invention by adding a certain amount of stabilizing agent, reduces the degradation rate of clethodim in order to overcome the deficiency of above technical elements greatly, makes fomesafen of the present invention and clethodim soybean field herbicide have wide spectrum, efficient advantage.

The present invention realizes by following measures:

A kind of fomesafen and clethodim soybean field herbicide is characterized in that being made by raw material and the step of following percentage by weight:

Fomesafen 10-15wt%,

Clethodim 10-15wt%,

Dimethyl formamide 15-20wt%,

Stabilizing agent N methyldiethanol amine 5-10wt%,

Emulsifier 5-10wt%,

Surplus is water;

Preparation process is as follows:

(1) fomesafen is mixed with dimethyl formamide, stir, fomesafen is dissolved fully, get compound A;

(2) compound A is mixed with clethodim and N methyldiethanol amine, stir, mix, get compound B;

(3) water and emulsifier are mixed, stir, add compound B, stir evenly, make aqueous emulsion.

Described fomesafen and clethodim soybean field herbicide is characterized in that: described emulsifier is Tween 80.

The invention has the beneficial effects as follows:

(1) improves the stability of clethodim, avoided the degraded of clethodim, by adding a certain amount of N methyldiethanol amine, improved the stability of clethodim.

(2) this patent is once rooted out soybean weeds comprehensively, and 24 hours take effect, and the strong monocotyledon weed of drug resistance is had preferably control efficiency, kills weeds and does not rebound, and a dispenser of peasant solves soybean weeds harm comprehensively, the saving of labor, saves time, saves money.

(3) this patent can be prevented and treated unifacial leaf and the broadleaf weed of Soybean Field by with after two kinds of composition processing combinations comprehensively, and particularly remarkable to the fiddlehead effect, herbicide speed is obviously faster than present weed killer herbicide.

(4) this product is owing to adopt aqueous emulsion, and it is low to have a cost, and technique is simple, reduces farmer's burdens.

(5) soybean safety, no seedling injury obviously alleviates the injury to large bean seedlings, and the suitable medicine phase is long, and all energy medications of 2 true leaf to 3 compound leaves of soybean do not affect output.

Embodiment:

Embodiment 1

Preparation 100kg fomesafen and clethodim soybean field herbicide

Fomesafen 12kg,

Clethodim 13kg,

Dimethyl formamide 17kg,

Stabilizing agent N methyldiethanol amine 8kg,

Tween 80 7.5kg,

Surplus is water;

Preparation process is as follows:

(1) the 13kg fomesafen is mixed with the 17kg dimethyl formamide, stir, fomesafen is dissolved fully, get compound A;

(2) compound A is mixed with 13kg clethodim and 8kgN-methyl diethanolamine, stir, mix, get compound B;

(3) 42.5kg water and 7.5kg emulsifier are mixed, stir, compound B is added, stir evenly, make aqueous emulsion.

Carry out product content after production is finished and detect, carry out the packing of product after qualified.

Embodiment 2

Preparation 100kg fomesafen and clethodim soybean field herbicide

Fomesafen 15kg,

Clethodim 15kg,

Dimethyl formamide 20kg,

Stabilizing agent N methyldiethanol amine 10kg,

Tween 80 10kg,

Surplus is water;

Preparation process is as follows:

(1) the 15kg fomesafen is mixed with the 20kg dimethyl formamide, stir, fomesafen is dissolved fully, get compound A;

(2) compound A is mixed with 15kg clethodim and 10kgN-methyl diethanolamine, stir, get compound B;

(3) 30kg water and 10kg emulsifier are mixed, stir, compound B is added, stir evenly, make aqueous emulsion.

Carry out product content after production is finished and detect, carry out the packing of product after qualified.

Embodiment 3

Preparation 100kg fomesafen and clethodim soybean field herbicide

Fomesafen 10kg,

Clethodim 10kg,

Dimethyl formamide 15kg,

Stabilizing agent N methyldiethanol amine 5kg,

Tween 80 5kg,

Surplus is water;

Preparation process is as follows:

(1) the 10kg fomesafen is mixed with the 15kg dimethyl formamide, stir, fomesafen is dissolved fully, get compound A;

(2) compound A is mixed with 10kg clethodim and 5kg N methyldiethanol amine, stir, get compound B;

(3) 55kg water and 5kg emulsifier are mixed, stir, compound B is poured into, stir evenly, make aqueous emulsion.

Carry out product content after production is finished and detect, carry out the packing of product after qualified.

The herbicidal effect contrast experiment:

Soybean field herbicide and the present single dose weed killer herbicide herbicidal effect that uses of Soybean Field of getting embodiment 3 preparations compare experiment, and it is as shown in table 1 that the result adds up.

Table 1 soybean field herbicide of the present invention and single dose weed killer herbicide herbicidal effect contrast table

Can find out by upper table, the usage amount of two kinds of active ingredients of soybean field herbicide of the present invention is obviously saved a lot, when effective ingredient consumption is 90 g/has, clethodim and fomesafen respectively are 45 g/has, the compare missible oil that contains 12% clethodim and contain 63 g/has and 300 g/has of the usage amounts of the missible oil of 15% fomesafen, usage amount has significantly saves, but the control efficiency aspect is well a lot of on the contrary, and visible weed killer herbicide of the present invention has greatly improved than single dose weed killer herbicide.

The stability test experiment:

Under 36 ℃ of conditions, the aqueous emulsion of embodiment 1-3 is carried out stability test, the degradation rate of clethodim is as shown in table 2 below.

Clethodim degradation rate table in table 2 weed killer herbicide of the present invention

As seen, the degradation rate of clethodim is lower much than generally per month degradation rate 6% in the weed killer herbicide of the present invention, and six months degradation rate does not also reach the words drug effect of using afterwards in 5%, a year and do not have clearly reduction yet, and stability is better.

Claims (1)

1. a fomesafen and clethodim soybean field herbicide is characterized in that being made by raw material and the step of following percentage by weight:

Fomesafen 10-15wt%,

Clethodim 10-15 wt%,

Dimethyl formamide 15-20 wt%,

Stabilizing agent N methyldiethanol amine 5-10 wt %,

Emulsifier 5-10 wt%,

Surplus is water;

Preparation process is as follows:

(1) fomesafen is mixed with dimethyl formamide, stir, fomesafen is dissolved fully, get compound A;

(2) compound A is mixed with clethodim and N methyldiethanol amine, stir, mix, get compound B;

(3) water and emulsifier are mixed, stir, add compound B, stir evenly, make aqueous emulsion;

Described emulsifier is Tween 80.