CN103960267B

CN103960267B - A kind of containing thifensulfuronmethyl with the Herbicidal combinations of pyroxsulam

Info

Publication number: CN103960267B
Application number: CN201410138239.5A
Authority: CN
Inventors: 吴泽伟; 陈佛祥; 朱刚; 王礼文; 张志伟
Original assignee: Guangdong Zhongxun Agri Science Corp
Current assignee: Guangdong Zhongxun Agri Science Corp
Priority date: 2014-04-08
Filing date: 2014-04-08
Publication date: 2016-09-07
Anticipated expiration: 2034-04-08
Also published as: CN103960267A

Abstract

The invention discloses a kind of containing thifensulfuronmethyl with the Herbicidal combinations of pyroxsulam, it includes active ingredient thifensulfuronmethyl and pyroxsulam, remaining is insecticides adjuvant, the mass fraction of thifensulfuronmethyl and pyroxsulam is 3%～80% than for 1:5～5:1, thifensulfuronmethyl and pyroxsulam quality summation mass percent in Herbicidal combinations.According to application needs, the present invention can be prepared as dispersibling the one in oil-suspending agent, suspending agent, wettable powder, water dispersible granules, is used for preventing and kill off winter wheat field annual gramineae and broad leaved weed.Said composition prevent and kill off winter wheat field annual gramineae and broad leaved weed effect is substantially better than each single dose, reduce dosage, delay herbicide resistance.

Description

A kind of containing thifensulfuronmethyl with the Herbicidal combinations of pyroxsulam

Technical field

The present invention relates to a kind of containing thifensulfuronmethyl with the compositions of pyroxsulam, be with thifensulfuronmethyl with Pyroxsulam is effective ingredient, is used for preventing and treating winter wheat field annual gramineae and broad leaved weed.

Background technology

Chemical method weeding is agriculturally one of Main Means controlling weeds.In recent years, due to some Herbicide kind large area is used alone, and already leads to a lot of weeds and develops immunity to drugs.Meanwhile, weeds Grass during generation is mutually complicated, grassy weed, broad leaved weed, the mixed life of dried tuber multiclass weeds, single product Plant herbicide use and can not solve farmland weed, all can show defect in a certain respect and limitation. Variety classes herbicide mixture, have that herbicidal spectrum is wide, promote actual effect, delay herbicide resistance, The advantages such as time and labour saving.

Thifensulfuronmethyl belongs to selective herbicide after inner sucting conduction type Seedling, is branched-chain amino acid synthetic inhibitor, The biosynthesis of valine, leucine, isoleucine can be suppressed, stop cell division, make sensitive work Thing stops growing.Be mainly used in preventing and kill off cereal crop Semen Tritici aestivi, Fructus Hordei Vulgaris, Herba bromi japonici, Semen Maydis field wealthy Leaf weeds, as Amaranthus retroflexus, Herba Galii Teneri, descurainia sophia (l.) webb ex prantl, Herba Capsellae, Herba Salsolae Collinae, Herba Galii Teneri, Herba veronicae, Cattle Herba stellariae mediae etc..

Pyroxsulam is sulfonamides inner sucting conduction type, selectivity wheat paddock herbicide after seedling.By weeds Blade, sheath portion, stem or root absorption, accumulate at growing point, suppresses acetolactate synthestase, nothing Method synthesis branched-chain amino acid, and then affect the synthesis of protein, cause weeds to stop growing, yellow, Then dead.

Variety classes herbicide mixture, has that herbicidal spectrum is wide, promote actual effect, delay weeds drug resistance Property, time and labour saving advantage.Screened by formulation of pesticide, actual prevention effect can be effectively improved, reduce Dosage, reduces cost, delays disease, worm, the drug-fast generation of crop smothering, is that agricultural synthesis is administered Important means.The recipe determination of thifensulfuronmethyl and pyroxsulam is conducted in-depth research by the present inventor, Find that thifensulfuronmethyl and pyroxsulam carry out mixture, in certain mixed ratio scope to winter wheat field one Year gives birth to grass family and broad leaved weed has potentiation or summation action, after further study, completes the present invention.

Summary of the invention

It is an object of the invention to solve in prior art to develop immunity to drugs farmland weed problem and reality Prevention effect is poor, it is provided that one is efficiently, low toxicity, quick-acting are good and the lasting period is long, beneficially farmland The Herbicidal combinations of weeds comprehensive control.

It is another object of the present invention to be used for preventing and kill off farmland weed by this Herbicidal combinations, be particularly useful for the winter little Wheatland annual gramineae and broad leaved weed etc..

Technical solution of the present invention: for achieving the above object, the invention provides a kind of containing thifensulfuronmethyl and The Herbicidal combinations of pyroxsulam, it comprises effective ingredient thifensulfuronmethyl and pyroxsulam, thifensulfuronmethyl With the mass fraction of pyroxsulam than for 1:5～5:1, thifensulfuronmethyl and pyroxsulam at Herbicidal combination Total mass fraction percentage composition in thing is 3%～80%, and remaining is for allowing in pesticide to use and can accept Auxiliary element.

Herbicidal combinations those skilled in the art of the present invention can select suitable pesticide according to known methods Preparation auxiliary element, makes and dispersibles oil-suspending agent, suspending agent, wettable powder, water dispersible granules Deng agriculturally conventional dosage form.

The present invention provide Herbicidal combinations in use auxiliary agent include solvent, emulsifying agent, wetting agent, Stabilizer, dispersant, safener, thickening agent, pH adjusting agent, defoamer, antifreezing agent, deionization Water, filler etc. are all various auxiliary agents conventional in Pesticide formulation, concrete composition and consumption according to Recipe requirements, is determined through simple test.

The production technology of the various application forms of Herbicidal combinations that the present invention provides all belongs to existing known skill Art, does not repeats them here.

The Herbicidal combinations that the present invention provides, uses stem and leaf spray method to use in the weeds 3～4 leaf phase, Other use technology agriculturally applied can also be used as required.

The Herbicidal combinations that the present invention provides has the advantages that:

1, the Herbicidal combinations that the present invention provides, shows obvious potentiation in certain ratio range and makees With, the prevention effect of compositions is significantly improved than single dose, reduces the using dosage of pesticide, subtracts Lack times for spraying, reduced drug cost, decrease the pesticide adverse effect to ecological environment.

2, the Herbicidal combinations that the present invention provides, the combination of two kinds of effective ingredient, expand herbicidal spectrum, A drug can solve weed problem, compensate for defect when single dose uses and limitation.

3, the Herbicidal combinations that the present invention provides, two kinds of effective ingredient mechanism of action are different, permissible Overcome long-term single use easily to produce the shortcoming of resistance, extend the service life of medicament, weeds are resisted The comprehensive control important in inhibiting of property.

4, the Herbicidal combinations that the present invention provides, drug effect plays rapidly, and the lasting period is long, and use cost is low, Easy to use, time saving and energy saving, its popularization and application have huge economic benefit and social benefit.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage more short and sweet, the present invention is with following Specific embodiment illustrates, but the present invention is only limitted to absolutely not these examples.The following stated is only this Bright preferable embodiment, is used only for describing the present invention, it is impossible to be interpreted as limitation of the scope of the invention. It should be pointed out that, all made within the spirit and principles in the present invention any amendment, equivalent With improvement etc., should be included within the scope of the present invention.

In these embodiments, unless otherwise indicated, all percentage ratios are all weight percentage.

Assays Example one: synergy measures.

For further appreciating that thifensulfuronmethyl and the synergy to weeds of the pyroxsulam mixture, the present inventor Thifensulfuronmethyl and pyroxsulam mixture have been carried out formulation screening test:

Test material:

Herba Galii Teneri [Galium aparine L.Var.tenerum] (field collection seed).

Amur foxtail [Alopecurus aequalis Sobol] (field collection seed).

Test apparatus:

Controlled illumination box；POTTER precision laboratory spray tower；Electronic balance (sensibility reciprocal 0.1mg)； Micropipette rifle etc..

Test method:

The purity first weighing certain mass is the 95% former medicine of thifensulfuronmethyl, the 96.5% former medicine of pyroxsulam, adds Enter and dilute with the Tween 80 aqueous solution of 0.1% after acetone fully dissolves, be configured to single dose mother solution, root respectively Arranging series proportioning according to mixture purpose, each proportioning arranges 5～7 Concentraton gradient.According to single dose herbicide Spectrum selects representative susceptible weeds seed, cultivates standby to 2 leaf 1 hearts.Numbering will be selected After weeds stem and leaf processes, it is placed on incubated at room temperature 20 days in illumination box, calculates prevention effect (fresh weight Preventive effect or strain preventive effect), then calculate dense EC50(95% confidence limit in suppression with method of least square), then Co-toxicity coefficient (CTC) is calculated by the abundant method of Sun Yun.

Co-toxicity coefficient (CTC) >=120 shows as potentiation；Co-toxicity coefficient (CTC)≤80 shows For antagonism；80 ＜ co-toxicity coefficient (CTC) ＜ 120 show as summation action.

Actual measurement toxicity index (ATI)=(standard agent EC₅₀/ reagent agent EC₅₀)×100。

Theoretical toxicity index (TTI)=(percentage composition of A in the toxicity index × mixture of the A)+(virulence of B The percentage composition of B in index × mixture).

Co-toxicity coefficient (CTC)=[mixture actual measurement toxicity index (ATI)/mixture theory toxicity index (TTI)] ×100。

Measurement result shows, thifensulfuronmethyl and pyroxsulam, between mixed ratio 1:5～5:1, have There are obvious potentiation or summation action.The mixed ratio of thifensulfuronmethyl and pyroxsulam respectively at 3:1 and During 1:1, the potentiation to Herba Galii Teneri and amur foxtail is obvious, and co-toxicity coefficient respectively reaches 135.46 Hes 159.10。

The synergy of Herba Galii Teneri is measured by table 1, different ratio thifensulfuronmethyl with pyroxsulam.

The synergy of amur foxtail is measured by table 2, different ratio thifensulfuronmethyl with pyroxsulam.

Example of formulations one: (30% thifensulfuronmethyl pyroxsulam wettable powder).

Mix homogeneously in blender will be entered after the coarse pulverization in proportion of above-mentioned formula, then after comminution by gas stream I.e. it is mixed to prepare 30% thifensulfuronmethyl pyroxsulam wettable powder.

Example of formulations two: (15% thifensulfuronmethyl pyroxsulam dispersibles oil-suspending agent).

Above-mentioned formula Central Plains medicine, solvent, emulsifying agent are dissolved into homogeneous oil phase；Under high velocity agitation, It is mixed to prepare 15% thifensulfuronmethyl pyroxsulam and dispersibles oil-suspending agent.

Example of formulations three: (33% thifensulfuronmethyl pyroxsulam suspending agent).

Above-mentioned formula is pulverized the most in advance, adds in sand mill and grind, mix through high shear After conjunction, allotment prepares 33% thifensulfuronmethyl pyroxsulam suspending agent.

Example of formulations four: (35% thifensulfuronmethyl pyroxsulam water dispersible granules).

By above-mentioned formula dry pulverization process in proportion, pelletize, dry, the prepared 35% thifensulfuronmethyl pyridine of screening Sulphur grass aqueous amine dispersive granule.

Field control effectiveness test embodiment one: to winter wheat field annual gramineae and the field of broad leaved weed The test of pesticide effectiveness.

Reagent agent and dispenser dosage:

(1) 30% thifensulfuronmethyl pyroxsulam wettable powder (15% thifensulfuronmethyl 15% pyroxsulam), Mu 18.6 grams of preparation (1#).

(2) 15% thifensulfuronmethyl pyroxsulam dispersible oil-suspending agent (7.5% thifensulfuronmethyl 7.5% pyridine Sulphur grass amine), mu 37.4 grams of preparation (2#).

(3) 33% thifensulfuronmethyl pyroxsulam suspending agents (22% thifensulfuronmethyl 11% pyroxsulam), mu With 16.4 grams of preparation (3#).

(4) 35% thifensulfuronmethyl pyroxsulam water dispersible granules (20% thifensulfuronmethyl 15% pyroxsulam), Mu 15.3 grams of preparation (4#).

(5) 15% thifensulfuronmethyl wettable powders, mu 13.3 grams of preparation (5#).

(6) 7.5% pyroxsulam water dispersible granules, mu 10.7 grams of preparation (6#).

Dispenser period: the weeds 3～4 leaf phase, be watered even spraying.

Prevent and kill off object: Herba Galii Teneri, amur foxtail, wild oat, Herba veronicae.

Result of the test is shown in Table 3.As can be seen from the test results: after medicine 15 days, the Herbicidal combination of the present invention Thing is at least up to more than 81.4% to the average preventive effect of winter wheat field annual gramineae and broad leaved weed.This Invention Herbicidal combinations, significantly better than the single dose of comparison, expands weed control spectrum, and potentiation is notable, quick-acting Property and lasting period are substantially better than single dose.

Table 3, preventing and treating winter wheat field annual gramineae and broad leaved weed field control effectiveness test result.

Claims

1. one kind contains thifensulfuronmethyl and the Herbicidal combinations of pyroxsulam, it is characterized in that: effective ingredient is thifensulfuronmethyl and pyroxsulam, the mass fraction ratio of thifensulfuronmethyl and pyroxsulam be 1:5～5:1, thifensulfuronmethyl and the pyroxsulam total mass fraction percentage composition in Herbicidal combinations be 3%～80%.

It is the most according to claim 1 a kind of containing thifensulfuronmethyl with the Herbicidal combinations of pyroxsulam, it is characterised in that: the dosage form of described Herbicidal combinations is to dispersible the one in oil-suspending agent, suspending agent, wettable powder or water dispersible granules.

3.RightRequire that a kind of Herbicidal combinations containing thifensulfuronmethyl and pyroxsulam described in 1 is applied in preventing and kill off winter wheat field annual gramineae and broad leaved weed.