CN109769819A - Ternary weeding composition and application thereof - Google Patents

Abstract

The invention discloses a kind of ternary weeding compositions, contain tri- kinds of active components of A, B, C, A is mesotrione, B is Acetochlor, C is S-metolachlor, mass ratio A:B:C is 0.25~10:1~30:1~29, can be configured to suspoemulsion, suspending agent, granule, wettable powder, water dispersible granules etc..Of the invention has apparent Herbicidal synergistic effect, improves preventive effect and herbicidal spectrum, reduces Pesticide use amount, is particularly suitable for Control Weeds in Maize Field, and promoting and applying has biggish economic benefit.

Description

Ternary weeding composition and application thereof

Technical field

The present invention relates to a kind of farm weeding compositions.

Background technique

Mesotrione (mesotrione), chemical name: 2-(4- mesyl) -2- nitrobenzene formyl) hexamethylene -1,3- Diketone, No. CAS: 104206-82-8.

Mesotrione is a kind of novel three ketones herbicide, both can with list processing native before seedling, can also after seedling cauline leaf Spraying, while quick, residual life, is short in the soil for mesotrione, to succession crop safety.Meanwhile bioactivity is super 10 times of sulphur humulone or more are crossed, there is potentiality to be exploited and competitiveness.Since its is environmentally friendly, pass through U.S. environment protection within 2001 The approval of office was sold in 2002 in EU countries and the U.S..But it is to broadleaf weeds common in corn field such as Siberian cocklebur, japanese bearbind Deng preventive effect be not very ideal.

Acetochlor (acetochlor), chemical name: -6 methyl of 2- ethyl -- N- ethoxyl methyl-alpha-chloro acetyl replace benzene Amine, No. CAS: 34256-82-1.

Acetochlor is a kind of widely applied herbicide.It is mesh since Monsanto Chemicals succeeded in developing in 1971 One of most important herbicide kind on former world, and one of maximum herbicide of China's usage amount at present.It is selectivity Bud pre-treatment herbicide conducts upwards after mainly being absorbed by monocotyledonous plumule or dicotyledon hypocotyl, main Stop weed bud, young root growth, and then dead by hindering protein synthesis that cell is inhibited to grow.Grass family is miscellaneous Ability after grass absorption Acetochlor is stronger than broadleaf weeds, so preventing and kill off the effect of gramineae weed better than broadleaf weeds.To herba digitariae, The annual gramineous weeds such as herba setariae viridis, herba eleusines indicae, barnyard grass, semen euphorbiae, amur foxtail, wild avena sativa, annual bluegrass, hard grass, herba eragrostidis pilosae There is special efficacy, also has certain preventive effect to broadleaf weeds such as Chenopodiaceae, Amaranthaceae, polygonaceae, the numerous beach wormwood of ox, Semen Cuscutaes.

S-metolachlor (s-metolachlor), chemical name: the chloro- N-(2- ethyl -6- aminomethyl phenyl of (S) -2-) - N-(2- methoxyl group -1- Methylethyl) acetamide and the chloro- N-(2- ethyl -6- aminomethyl phenyl of (R) -2-)-N-(2- methoxyl group -1- Methylethyl) acetamide mixture, No. CAS: 178961-20-1.

S-metolachlor belongs to selective preemergence herbicide, is mainly used for corn and soybean, peanut, sugarcane, it is also possible to In the crops such as the cotton of non-sand loam soil, rape, potato and onion, capsicum, wild cabbage, annual grassy weeds and certain broad-leaveds are prevented and treated Weeds make native surface treatment before budding.

Herbicide kind containing single active ingredient haves the defects that different degrees of in agriculture weeding process: continuously making With drug resistance is easy to produce, herbicidal spectrum is not wide enough, can only prevent and kill off monocotyledon weed or broadleaf weed, or can only prevent and kill off emergence Weeds or the weeds that do not emerge, cannot and it is anti-.By the compounding of two or more active component, preventive effect can be improved, The usage amount of effective component is reduced, cost is prevented and kill off in saving, delays the generation of herbicide resistance, extends medicament service life, and subtract Few pollution to environment.

Summary of the invention

Goal of the invention: efficient one kind, low toxicity, ternary weeding composition pesticide of low cost and application thereof are provided.

Technical solution:

The ternary weeding composition that the present invention mentions, containing tri- kinds of active constituents of A, B, C, component A is mesotrione, B is second grass Amine, C are S-metolachlor.It measures in mass ratio, the total content of A, B and C account for the 5%-60% of ternary weeding composition, wherein A It accounts for 0.25%~10%, B and accounts for 1~30%, C and account for 1~29%.

It is preferred that A:B:C=100~150:900:600~900, at this point, the synergistic effect for preventing and kill off herba setariae viridis is best.

Auxiliary agent is added in the Herbicidal combinations and excipients (separately contain surfactant, dispersing agent, wetting agent, emulsification One of agent, disintegrating agent, stabilizer, thickener or adhesive are a variety of), the production known according to those skilled in the art Technique, is prepared into any one dosage form for being suitble to agriculturally use, and relatively good dosage form has suspoemulsion, granule, wettable powder Agent, water dispersible granules etc. are especially suitable for making dispersible oil-suspending agent, microcapsule suspending agent.

The auxiliary agent and excipients include surfactant, dispersing agent, wetting agent, emulsifier, disintegrating agent, stabilizer, Thickener, adhesive etc. and other be beneficial to effective component it is stable in the formulation and play drug effect known substance, be all pesticide Ingredient commonly used or allowed to use, is not particularly limited in preparation, and specific ingredient and dosage are true by test according to recipe requirements Recognize.

The beneficial effects of the present invention are:

1) pesticide main component in the different mesotrione of the mechanism of action, Acetochlor and S-metolachlor three is subjected to mixture, The synergistic function generated using mixture, three kinds of ingredients are compounded using suitable ratio, have apparent synergistic effect, are improved The effect of management of weeds.

2) cross resistance is not present in mechanism of action uniqueness, Pesticide use amount is reduced, to reduce costs and reduce Pollution to environment is conducive to delay Weed Resistance, and popularization and application have huge economic benefit and social benefit；Corn has Good safety.In addition, the lasting period is long, a drug can control entire breeding time Weed infestation, effectively reduce application time Several and dispenser cost.

3) compared with conventional mesotrione, Acetochlor, atrazine ternary built product in the market, to succession crop without shadow It rings, has evaded atrazine to polluted source, the negative effect to ecological environments such as frog breedings.

4) S-metolachlor and Acetochlor are to close herbicide before dry land bud.S-metolachlor safety is obviously high In Acetochlor, and Acetochlor activity of weeding is higher than S-metolachlor.The two collaboration, it is ensured that under the premise of safety, improve weeding Preventive effect reduces use cost, increases economic efficiency.

Specific embodiment

The contents of the present invention are described in further detail below with reference to embodiment, the content mentioned in embodiment is not to this The restriction of invention, material prescription selection can adaptation to local conditions and to result without substantive influence.In these embodiments, except as otherwise Outside illustrating, so percentage is weight percentage.

The present invention compounds the indoor synergy to weeds by indoor pot experiment, to herbicidal activity component A, B and C It is measured, specifies synergy of the composition to weeds.

Weeds cultural method: quantitative weed seed herba setariae viridis is planted in respectively in the dixie cup equipped with Nutrition Soil of 7 ㎝, Broadcast hot-house culture again after rear earthing, suppression, water drenching.It is long to 1-3 leaf phase, broad-leaved in gramineae weed using stem and leaf treatment after seedling The weeds 2-4 leaf phase is handled；Test sets 3 repetitions.To medical fluid natural air drying after processing, it is put in room temperature and conventionally manages Reason 30 days after processing, carries out range estimation preventive effect investigation according to the suppressed or dead situation of weeds.

E₀ The practical preventive effect of composite weedicide one by one；

E individually uses the simple superposition preventive effect of herbicide one by one.

E₀- E > 10% is synergistic effect；E₀- E < -10% is antagonism；E₀- E value is addition between ± 10%.

The synergy to weeds mixed with S-metolachlor of 1 mesotrione of table, Acetochlor

Example of formulations 1:5.5% nitre second S-metolachlor granule

Mesotrione 0.5%,

Acetochlor 2.5%,

S-metolachlor 2.5%

Emulsifier 2%,

Dispersing agent 3%,

Methyl oleate 10%

Attapulgite particle supplement.

The preparation method comprises the following steps: mesotrione, Acetochlor, S-metolachlor, emulsifier, dispersing agent and methyl oleate are distinguished It is put into sand mill to be processed into after metering and oil-suspending agent can be dispersed containing mesotrione, Acetochlor, S-metolachlor, it is spare. The liquid is added in attapulgite particulate vector, it is stirring while adding, adsorbed, dry to get.

Example of formulations 2:45% nitre second S-metolachlor suspoemulsion

Mesotrione 5%,

Acetochlor 20%,

S-metolachlor 20%

Wetting dispersing agent 4%,

Emulsifier 6%,

Citric acid 10%,

Ethylene glycol 3%,

Xanthan gum 0.12%,

Sodium benzoate 0.2%,

Defoaming agent 0.2%,

Deionized water complements to 100%.

The preparation method comprises the following steps: each component is weighed according to formula, by auxiliary agents such as solid mesotrione raw medicine, dispersing agent, wetting agents And part water bulk pruning cut after put into sand mill in be directly sanded, obtain suspending agent；By liquid active compound Acetochlor, smart isopropyl first The auxiliary agents such as careless amine and emulsifier and part water put into the shearing of high-shear emulsifying kettle high speed, obtain aqueous emulsion；By suspending agent with Aqueous emulsion obtains 45% nitre according to a certain percentage and after thickener, preservative, antifreezing agent, defoaming agent being added etc. and being uniformly mixed Second S-metolachlor suspoemulsion.

Oil-suspending agent can be dispersed in example of formulations 3:35% nitre second S-metolachlor

Mesotrione 5%,

Acetochlor 20%,

S-metolachlor 10%,

Emulsifier triphenyl vinyl phenol polyoxyethylene ether 5%,

Emulsifier butene dioic acid dibutyl ester sulfoacid calcium 3%,

Sodium methylene bis-naphthalene sulfonate 5%,

Xanthan gum 0.15%,

Organobentonite 2%,

Sodium benzoate 0.2%,

Organic silicon defoamer 0.2%,

Methyl oleate complements to 100%.

The preparation method comprises the following steps: by active constituent mesotrione, Acetochlor, S-metolachlor, wetting agent, dispersing agent, thickening Agent, preservative, defoaming agent, methyl oleate are put into stirred tank, are sufficiently stirred, and material suction sand mill is sufficiently sanded, Oil-suspending agent product can be dispersed to get 35% nitre second S-metolachlor after the completion of sand milling.

Example of formulations 4:45% nitre second S-metolachlor microcapsule suspending agent

Mesotrione 5%,

Acetochlor 20%,

S-metolachlor 20%,

Oil-soluble capsule material 1.8%,

Water-soluble capsule material 0.3%,

Polycarboxylate salt dispersant 2%,

Block polyether class surfactant 7%

Xanthan gum 0.15%,

Aluminium-magnesium silicate 1%,

Sodium benzoate 0.2%,

Organic silicon defoamer 0.2%,

Water complements to 100%.

The preparation method comprises the following steps: by the Acetochlor measured, S-metolachlor, oil-soluble capsule material, water-soluble capsule material, dispersion Agent, emulsifier, xanthan gum, sodium benzoate, defoaming agent and water process 40% second S-metolachlor using interfacial polymerization Micro-capsule suspension, it is spare；Mesotrione, dispersing agent, aluminium-magnesium silicate, xanthan gum, sodium benzoate, defoaming agent and water are used into sand Grinding machine prepares 20% mesotrione suspending agent, spare.By prepared 40% second S-metolachlor micro-capsule suspension and 20% Mesotrione suspending agent is mixed according to a certain percentage to get 45% nitre second S-metolachlor microcapsule suspension-suspendinagent agent.

Above-described embodiment is selected to carry out the field control effectiveness test of Control Weeds in Maize Field, to determine that formula is prevented and kill off in corn field The preventive effect of annual gramineous weed and broadleaf weeds is embodied as follows:

Field corn is 5 leaf phases, gramineae weed 1-3 leaf phase, broadleaf weeds 2-4 leaf phase.Test reagent is prepared according to example, Test totally four processing, three repetitions of each processing, cell random alignment, plot area are 100 ㎡.Carry out a cauline leaf spray Mist 15 days and observes the strain preventive effect of each medicament for 30 days after medicine respectively.

Respondent is two kinds of weeds of field barnyard grass and Amaranthus retroflexus, visual test reagent.Preventive effect calculates according to the following equation:

Preventive effect (%)=×100

2 embodiment field demonstration of table tests pharmacodynamic results

Show after mesotrione, Acetochlor, S-metolachlor ternary built, there is notable synergistic to make from above-mentioned data result Extended with, lasting effect, prevent and kill off spectrum and expand.Wherein, embodiment 3,4 is more preferable.

Claims (4)

1. a kind of ternary weeding composition contains tri- kinds of active components of A, B, C, it is characterised in that: A is mesotrione, and B is second grass Amine, C are S-metolachlor；It measures in mass ratio, the total content of A, B and C account for the 5%-60% of ternary weeding composition, wherein A It accounts for 0.25%~10%, B and accounts for 1~30%, C and account for 1~29%；Separately contain surfactant, dispersing agent, wetting agent, emulsifier, disintegration One of agent, stabilizer, thickener or adhesive are a variety of.

2. according to ternary weeding composition described in claims 1, it is characterised in that: be made into dosage form be dispersible oil-suspending agent or Person's microcapsule suspending agent.

3. a kind of application of ternary weeding composition, it is characterised in that: using ternary weeding group described in claims 1 or 2 Object is closed, for preventing and kill off gramineae weed, broadleaf weeds and nutgrass flatsedge.

4. the application of ternary weeding composition as claimed in claim 3, it is characterised in that: be made into dispersible oil-suspending agent or Microcapsule suspending agent, for preventing and kill off corn field barnyard grass and Amaranthus retroflexus.