CN107396928A

CN107396928A - A kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne

Info

Publication number: CN107396928A
Application number: CN201710668588.1A
Authority: CN
Inventors: 李冰清; 李玉洁
Original assignee: Anhui Saint Fung Biochemical Co Ltd
Current assignee: Anhui Saint Fung Biochemical Co Ltd
Priority date: 2017-08-07
Filing date: 2017-08-07
Publication date: 2017-11-28

Abstract

The invention discloses a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne.Quality accounting of the three in herbicidal composition is (1%~45%)：(1%~22.5%)：(1%~22.5%), preferably (2%~22.5%)：(2%~11%)：(2%~11%).The mass accumulation of three is the 3%~90% of the composition gross mass, preferably 6%~33.5%.Component in the present invention is reasonable, the composition of three has enhancing property of medicine effect, activity when preventive effect is administered alone better than each component, reduce the spraying times in transplanting rice field, reduce cost accounting, slow down the generation of the Weed Resistance in transplanting rice field, it is good to rice crop security, meet the security requirement of pesticidal preparations.All there is preferable preventive effect to most of transplanting rice field weed such as transplanting rice field barnyard grass, moleplant seed, difformed galingale herb and to Security of rice height.

Description

A kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne

Technical field

The present invention relates to a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne, and in particular to a kind of For preventing and treating the herbicide of transplanting rice field annual grassy weeds and barnyard grass, it is by butachlor, Oxyfluorfen and symetryne For the ternary herbicidal composition of activity composition.

Background technology

From or so nineteen fifty large-area applications 2,4-drop, since the chlorine of 2 first 4 prevents and kill off rice terrace broad leaved weed, rice terrace is with removing Careless agent kind is developed rapidly, and kind is updated, and has successively emerged in large numbers diphenyl ether, thiocarbamates, amide-type, quinoline The herbicides such as carboxylic acids, sulfonylurea, the more perfect Chemical Weeding System for being adapted to rice different planting is formd, As indispensable, highly important well stimulation in Rice Production.

But as numerous herbicide kinds persistently use in rice terrace large area, also produce the problem of many：1. weeds Resistance protrudes, wherein it is more prominent to the resistance of propanil, Oxyfluorfen, Oxyfluorfen, benthiocarb with barnyard grass, recently, thousand The common weeds such as Cyperaceae, Pontederiaceae, the Alismataceaes such as gold, firefly Lin, angustifolia arrowhead herb, Monochoria korsakowii, different in nature nutgrass flatsedge grass are to sulfonylureas Class herbicide generates resistance, makes weeding problem more complicated.2. perennial weeds harm turns into major issue, particularly Cyperaceae Perennial weeds is more prominent.3. advanced age barnyard grass and the problem of preventing and kill off of moleplant seed need to solve.4. the herbicide controlling spectrum of herbicide kind has Wait to expand, and extend the lasting phase that soil prevents and kill off medicament.5. for wide spectrum, selectivity herbicide kind strong, easy to use Demand is more urgent.

Butachlor is amide-type selectivity Uptake and translocation herbicide.Sterling is pale yellow oily liquid, has micro- fragranced. Water is insoluble in, is soluble in a variety of organic solvents.Chemical property is stable under normal temperature and neutrality, weak basic condition.Under strong acid condition Its decomposition can be accelerated, can be degraded in soil.To people and animals' low toxicity, there is stimulation to skin, eyes, to fish high poison.Fourth Careless amine is mainly absorbed by the young shoot of weeds, is then conducted complete stool and is worked.It can be used with seedling stage before bud.Plant absorption fourth After careless amine, suppress in vivo and destroy protease, influence the formation of protein, suppress weed bud and young root normal growth hair Educate, so that weeds are dead.Being used on the higher soil of clay loam and the content of organic matter, medicament can be absorbed by soil colloid, It is not easy to be leached, the special efficacy phase was up to 1-2 months.

Oxyfluorfen is the fluorine-containing benzene ether-derivative herbicides succeeded in developing by Rhom and Hass of the U.S. in 1975, its weeding Activity improves 5-10 times than corresponding nitrofen, is 16.32 times of benthiocarb.Use range is wide, broad weed-killing spectrum, lasting period length, Mu dosage is few, and activity is high, can be used with a variety of mixture of herbicides, expands herbicide controlling spectrum, and raising drug effect is easy to use, both can be before bud Processing, again can bud post processing, toxicity is low.

Symetryne prevents and kill off the weeds such as barnyard grass, fescue, bog pondweed, rhizoma alismatis, angustifolia arrowhead herb, Brittle Falsepimpernel Herb, S. potamogetifolia suitable for rice field, With the herbicide mixture such as benthiocarb, butachlor, molinate, herbicide controlling spectrum can be expanded.Also can be used for corn and soybean, wheat, peanut, The crop fields weeding such as cotton.

In actual use, when butachlor, Oxyfluorfen and symetryne are used alone, to the barnyard grass of transplanting rice field The drug effect of grass, moleplant seed, difformed galingale herb, eleusine indica etc. is not very notable.Therefore, inventor is careless by butachlor, ethoxy fluorine Ether and symetryne carry out rational mixture, and discovery has notable synergy, expand control of weeds spectrum, transplanting rice field is prevented and kill off in a dispenser Draft grass family, Cyperaceae, spraying times are reduced, reduce the effect of cost accounting.

The content of the invention

It is an object of the invention to provide a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne, carry Reasonable for a kind of component, herbicidal spectrum is wide, and preventive effect is good, and drug cost is low, is not likely to produce drug-fast a kind of containing butachlor, ethoxy fluorine The herbicidal composition of careless ether and symetryne.

Another object of the present invention is to provide above-mentioned composition to be used to prevent and kill off transplanting rice field and rice seedling bed and throwing Purposes in seedling rice field draft grass family, sedge weed.

The defects of in order to overcome existing unitary agent, skill scheme of the invention so solve：

The present invention is a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne, contains active component Butachlor, the Oxyfluorfen containing active component and the symetryne containing active component, three is in herbicidal composition Quality accounting is (1%~45%)：(1%~22.5%)：(1%~22.5%)；Butachlor, Oxyfluorfen and symetryne three Quality accounting of the person in herbicidal composition is (2%~22.5%)：(2%~11%)：(2%~11%).Butachlor, second The mass accumulation of oxygen AKH7088 and symetryne is the 3%~90% of the composition gross mass；Butachlor, Oxyfluorfen and west The net mass accumulation of grass is the 6%~33.5% of the composition gross mass.

According to method known in those skilled in the art, present invention one kind contains butachlor, Oxyfluorfen and symetryne Herbicidal composition practical application when can be configured to any formulation for agriculturally allowing, preparation formulation is that emulsifiable concentrate, moisture dissipate Granula, wettable powder, pulvis, granule, suspending agent, dispersible oil-suspending agent.

To suspending agent, workable auxiliary agent has：Dispersant be selected from polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, TERSPERSE 2425 (Huntsman Corporation of the U.S. produces, alkyl naphthalene sulfonic acid salt)；Emulsifying agent such as Nongru-700 # (common names：Alkane Base fluosite APEO), agriculture breast 2201, this disk -60# (common names：Sorbitan monostearate), emulsifying agent T-60 (common names：Sorbitan monostearate APEO), agriculture breast 1601# (common names：Phenethyl phenol polyoxy second Alkene polyethenoxy ether), TERSPERSE 4894 (Huntsman Corporation of U.S. product)；Wetting agent is selected from alkylphenol-polyethenoxy base ether Formaldehyde condensation products sulfate, alkylphenol-polyethenoxy base ether phosphate, phenethyl phenol polyoxyethylene groups ether phosphate, alkylsurfuric acid Salt, alkylsulfonate, naphthalene sulfonate, TERSPSE2500 (Huntsman Corporation of U.S. product)；Thickener is selected from xanthans, poly- second Enol, bentonite, aluminium-magnesium silicate；Preservative is selected from formaldehyde, benzoic acid, sodium benzoate；Defoamer is organic silicon defoamer；It is anti- Freeze agent and be selected from ethylene glycol, propane diols, glycerine, urea, inorganic salts (such as sodium chloride).

To dispersible oil-suspending agent, workable auxiliary agent has：Dispersant is selected from polycarboxylate, lignosulfonates, alkyl Naphthalene sulfonate, TERSPERSE 2425；Emulsifying agent is selected from BY series emulsifying agent (BY-110, BY-125, BY-140), agriculture breast 700#, agriculture breast 2201, this disk -60#, Tween-60 #, agriculture breast 1601#, TERSPERSE 4894；Wetting agent is selected from alkyl phenol polyoxy Vinyl ethers formaldehyde condensation products sulfate, alkylphenol-polyethenoxy base ether phosphate, phenethyl phenol polyoxyethylene groups ether phosphate, Alkyl sulfate, alkylsulfonate, naphthalene sulfonate, TERSPERSE 2500；Thickener is selected from white carbon, polyvinyl alcohol, swelling Soil, aluminium-magnesium silicate；Antifreezing agent is selected from ethylene glycol, propane diols, glycerine, urea, inorganic salts (such as sodium chloride)；Stabilizer is selected from ring Oxygen soybean oil, epoxychloropropane, triphenyl phosphate；Decentralized medium is selected from soybean oil, rapeseed oil, corn oil, methyl oleate, bavin Oil, machine oil, mineral oil.

Further, herbicidal composition containing butachlor, Oxyfluorfen and symetryne prevent and kill off transplanting rice field with And the application in rice seedling bed and rice transplanting rice field annual grassy weeds.

Further, it is that grassy weed, broad leaved weed and Cyperaceae are miscellaneous applied to transplanting rice field annual grassy weeds Grass.

The invention has the advantages that：

1st, the component in the present invention is reasonable, and the composition of three has enhancing property of medicine effect, and it is independent that preventive effect is better than each component Using when activity, while expand control of weeds spectrum, the grassy weed in transplanting rice field is prevented and kill off in a dispenser, broad leaved weed and Sedge weed, the spraying times in transplanting rice field are reduced, reduce cost accounting, slow down the production of the Weed Resistance in transplanting rice field It is raw, it is good to rice crop security, meet the security requirement of pesticidal preparations.

2nd, it is of the invention to most of transplanting rice field weed such as transplanting rice field barnyard grass, moleplant seed, difformed galingale herb all With preferable preventive effect and to Security of rice height.

Certainly, any product for implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.

Embodiment

Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention Embodiment, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of protection of the invention.

In order to prevent and treat rice terrace broad leaved weed, grassy weed and the sedge weed in agricultural production, inventor is with fourth Careless amine, Oxyfluorfen and symetryne have carried out Toxicity Determination research, and specific method is that indoor pot method is carried out at cauline leaf Reason, test reference《The part of farm-chemical indoor determination test rule herbicide the 9th》.

1.1 reagent agent

95% butachlor active compound；95% Oxyfluorfen active compound；95% symetryne active compound.

1.2 for examination weeds

Difformed galingale herb (category Cyperaceae)

Moleplant seed (category grass family Sprangletop)

Barnyard grass (category grass family Echinochloa)

1.3 experimental design

The experiment sets 14 processing altogether, and wherein butachlor, Oxyfluorfen and symetryne sets 1.0,3.0 gram/ha 2 respectively Individual dosage processing, butachlor, Oxyfluorfen are mixed with symetryne three to be set up separately：

1.0+1.0+1.0,1.0+1.0+3.0,3.0+1.0+1.0,3.0+1.0+3.0 gram/ha；

1.0+3.0+1.0,1.0+3.0+3.0,3.0+3.0+1.0,3.0+3.0+3.0 gram/ha；

14 dosage ratio processing, 1 auxiliary agent control is separately set, 15 processing is set altogether, is repeated four times.

1.4 test method

Medicament is using now with the current, after active compound uses dmso solution, adds the emulsifying agent of tween 82, it is female to prepare 10% Liquid.According to medicament characteristic, 3 dosage from high to low is set.

The culture of target weeds uses potted plant cultivation, with 11 × 12cm plastic tubs, the rice field of herbicide will be not used In the soil adopted back air-dry, fill basin after sieving, in basin at dry ground quantitative 4/5, soil pH value 7.0, the content of organic matter 1.2%.Will Each about 30 uniform program requests are in soil surface, blinding after difformed galingale herb, moleplant seed, the barnyard grass seed of last year field collection soak It is placed in greenhouse and cultivates after 2.5cm~1cm, 28~32 DEG C/18~25 DEG C of indoor temperature (d/n), after planting keeps ground moistening. Spray in spray tower (ASS-1 type pesticide spraying systems, DG8203 sprays are put in weeds difformed galingale herb, moleplant seed, barnyard grass 3-5 leaves Head, atomisation pressure 2.75MPA, spouting liquid 40kg/ mus), dispenser preserves 3cm water layers after one day, is placed in greenhouse and cultivates observation.

1.5 weedy rices and analysis method

Growth conditions, poisoning symptom and the poisoning degree of periodical visual inspection observation weeds, record symptom of chemical damage, after medicine after dispenser 14 days reasonability matched with 21 days type of action using the mixed medicament of Colby method evaluations, further discussion.

1.5.1 ocular estimate

After dispenser 14 days with ocular estimate investigation records activity of weeding, investigated using following grade scale：

1 grade：It is all dead；

2 grades：Equivalent to the 0-2.5% of blank district；

3 grades：Equivalent to the 2.6-5% of blank district；

4 grades：Equivalent to the 5.1-10% of blank district；

5 grades：Equivalent to the 10.1-15% of blank district；

6 grades：Equivalent to the 15.1-25% of blank district；

7 grades：Equivalent to the 25.1-35% of blank district；

8 grades：Equivalent to the 35.1-67.5% of blank district；

9 grades：Equivalent to the 67.6-100% of blank district；

1.5.2 growth inhibition assay

Clip respectively handles ground chlorenchyma at 21 days, using scales/electronic balance weighing, actual survival rate E is calculated, using public affairs Formula (2) calculates theoretical survival rate E0, is examined with Colby methods, the mixed synergy type to weeds of evaluation three.

The check plot weeds fresh weight (1) of actual survival rate E (%)=treatment region weeds fresh weight × 100/

Theoretical survival rate E0=XYZ/100 (n-1)

X represents that herbicide 1 is the Weed-control effect of butachlor

Y represents that herbicide 2 is the Weed-control effect of Oxyfluorfen

Z represents that herbicide 3 is the Weed-control effect of symetryne

N represents that mixture herbicide kind is total (2)

As E-E0 ＞ 10%, illustrate to produce synergistic effect, as E-E0 ＜ -10%, illustrate to produce antagonism, work as E- E0 between ± 10% when, illustrate produce addition.

2 results and analysis

2.1 weeds death conditions

5 days after dispenser, the barnyard grass growth handled using butachlor single dose is slowed down, and difformed galingale herb, moleplant seed start Huang occur Change symptom to wither therewith until dead；The barnyard grass terminal bud of 7 days Oxyfluorfens of dispenser processing reddens, start it is dead, it is moleplant seed, different Type nutgrass flatsedge terminal bud has the different degrees of symptom that reddens；The barnyard grass terminal bud of dispenser symetryne processing in 8 days reddens, and beginning is dead, and thousand Gold, difformed galingale herb terminal bud have the different degrees of symptom that reddens.

14 days visual observations after 2.2 medicines

14 days after medicine, range estimation investigation is carried out to each-reason area weeds, it is as a result as follows：

The butachlor Oxyfluorfen symetryne of table 1 uses the visual observation (level) of 14 days difformed galingale herbs after medicine with

Butachlor Oxyfluorfen symetryne	Ai.g/ha
		1.0+1.0+1.0	9
1.0+1.0+3.0	7
		3.0+1.0+1.0	6
3.0+1.0+3.0	5
		1.0+3.0+1.0	5
1.0+3.0+3.0	3
		3.0+3.0+1.0	3
3.0+3.0+3.0	1

The butachlor Oxyfluorfen symetryne of table 2 uses the visual observation (level) of 14 days moleplant seeds after medicine with

The butachlor Oxyfluorfen symetryne of table 3 uses the visual observation (level) of 14 days barnyard grasses after medicine with

Butachlor Oxyfluorfen symetryne	Ai.g/ha
		1.0+1.0+1.0	9
1.0+1.0+3.0	7
		3.0+1.0+1.0	6
3.0+1.0+3.0	5
		1.0+3.0+1.0	4
1.0+3.0+3.0	2
		3.0+3.0+1.0	2
3.0+3.0+3.0	1

21 days investigation results after 2.3 medicines

The butachlor Oxyfluorfen symetryne of table 3 is mixed to the actual survival rate of difformed galingale herb and theoretical survival rate

The mixed virulence to difformed galingale herb of butachlor, Oxyfluorfen, symetryne：Butachlor to the preventive effect of difformed galingale herb compared with It is good, it is the sensitive medicaments of weeds, Oxyfluorfen is general to the preventive effect of difformed galingale herb, preventive effect one of the symetryne to difformed galingale herb As, with the increase of butachlor, Oxyfluorfen, symetryne dosage, the preventive effect of difformed galingale herb is improved after using with.From table 3 Actual preventive effect difference is generally higher than 10% after going out to use with, is in synergistic effect to the preventive effect of difformed galingale herb after three is mixed.

The mixed actual survival rate to moleplant seed of the butachlor Oxyfluorfen symetryne of table 4 and theoretical survival rate

The mixed virulence to moleplant seed of butachlor, Oxyfluorfen symetryne：Butachlor, Oxyfluorfen, symetryne It is general to the preventive effect of moleplant seed, with the increase of butachlor, Oxyfluorfen, symetryne dosage, moleplant seed is prevented after mixed Effect greatly improves.Actual preventive effect difference after using with as seen from Table 4 is generally higher than 10%, to the preventive effect of moleplant seed after three is mixed In synergistic effect.

The mixed actual inhibiting rate to barnyard grass of the butachlor Oxyfluorfen symetryne of table 5 and theoretical inhibiting rate

The mixed virulence to barnyard grass of butachlor, Oxyfluorfen, symetryne：Butachlor is excellent to the preventive effect of barnyard grass, is medicine The susceptible weeds of agent, Oxyfluorfen have stronger inhibitory action to barnyard grass, and symetryne has stronger inhibitory action to barnyard grass, with The increase of butachlor, Oxyfluorfen, symetryne dosage, the preventive effect of barnyard grass is greatly improved after using with.Use with as seen from Table 5 Actual preventive effect difference afterwards is more than 10%, is in synergistic effect to the preventive effect of barnyard grass after three is mixed.

As can be seen from the above test results, butachlor, Oxyfluorfen, symetryne are used with, to difformed galingale herb, a thousand pieces of gold Son, barnyard grass are in synergistic effect, mixed to expand herbicide controlling spectrum, delay Weed Resistance, reduce butachlor and Oxyfluorfen, west grass The two net single dose content, improves total preventive effect, reduces application cost, safer to crop, and the two, which is used with, in production one Fixed feasibility.

Example of formulations 1

Weigh 3% Oxyfluorfen, 3% butachlor, 3% symetryne, 1.5%NNO, 1%TERSPERSE 2500,2% Emulsifying agent T-60,3% Nongru-700 #, 0.1% xanthans, the 5% the third ethanol, 2.5% formaldehyde, 0.3% organic silicon defoamers, go from Sub- water adds to 100% parts by weight.Above-mentioned raw materials are blended, and high speed shear disperses 30min, and 9% fourth is made after being sanded with sand mill Careless amine Oxyfluorfen symetryne suspending agent.

Example of formulations 2

Weigh 15% Oxyfluorfen, 8% butachlor, 7% symetryne, 3% Nongru-700 #, 2% agriculture breast 1601#, 1.5% TERSPERSE 2500,2.5%TERSPERSE 2425,0.2% xanthans, 3% white carbon, 5% ethylene glycol, 0.3% benzene first Acid, 2.5% organic silicon defoamer, deionized water add to 100% parts by weight.Above-mentioned raw materials are blended, and high speed shear is disperseed 30min, 30% butachlor Oxyfluorfen symetryne suspending agent is made after being sanded with sand mill.

Example of formulations 3

Weigh 2% Oxyfluorfen, 2% butachlor, 2% symetryne, 2% dispersing agent NNO, 9% agriculture breast 2201#, 2% The aluminium-magnesium silicate of BY-110,1%TERSPERSE 2500,1%, 3% propane diols, 15% epoxidized soybean oil, soybean oil add to 100% Parts by weight.Above-mentioned raw materials are blended, are input into reactor 30min, and 6% butachlor Oxyfluorfen symetryne is then made and answers With emulsifiable concentrate.

Biological examples：Prevent and kill off transplanting rice weeds field control effectiveness test

Inventor has carried out 6% butachlor ethoxy fluorine grass on June 6th, 2011 in Jiaxing City, Zhejiang Province transplanted rice field Experiment of ether symetryne (2%+2%+2%) the compounded cream agent to paddy field weed.Field main weeds have Eclipta prostrata, rain long Flower, difformed galingale herb, difformed galingale herb and moleplant seed, weed size is in the 2-4 leaf phases.Test medicine and dosage are 6% butachlor second Oxygen AKH7088 symetryne compounded cream agent 20g/ mus, 40g/ mus, the 25g/ liter dispersible oil suspending agent 60ml/ mus of butachlor, 10% Oxyfluorfen wettable powder 20g/ mus, 10% symetryne wettable powder 20g/ mus.Using conventional spray-on process.

The dispersible oil-suspending agent of butachlor Oxyfluorfen symetryne of table 6 6% is imitated to transplanted rice field weed control Fruit

The dispersible oil-suspending agent of butachlor Oxyfluorfen symetryne of table 7 6% is imitated to transplanted rice field weed control Fruit

The dispersible oil suspending agent of butachlor Oxyfluorfen symetryne of table 8 6% is to transplanted rice field weed control efficacy

Result of the test shows：After 6% butachlor Oxyfluorfen symetryne compounded cream agent 40g/ mu medicines 30 days it is right Monochoria korsakowii, difformed galingale herb, Eclipta prostrata, moleplant seed, average the strain preventive effect and fresh weight preventive effect of barnyard grass are all remarkably higher than comparison medicament 25g/ Rise the dispersible oil suspending agent 60ml/ mus of butachlor, 10% Oxyfluorfen wettable powder 20g/ mus, 10% symetryne wettable powder Agent 20g/ mus, 10% symetryne wettable powder 20g/ mus, illustrate there is obvious synergy in crop field after three medicament mixtures Effect, while drug cost has been saved, expand control of weeds spectrum.

In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means At least one implementation of the present invention is contained in reference to specific features, structure, material or the feature that the embodiment or example describe In example or example.In this manual, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term. Moreover, specific features, structure, material or the feature of description can close in any one or more embodiments or example Suitable mode combines.

Present invention disclosed above preferred embodiment is only intended to help and illustrates the present invention.Preferred embodiment is not detailed All details are described, it is only described embodiment also not limit the invention.Obviously, according to the content of this specification, It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is to preferably explain the present invention Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only Limited by claims and its four corner and equivalent.

Claims

1. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne, it is characterised in that contain active component Butachlor, the Oxyfluorfen containing active component and the symetryne containing active component, three is in herbicidal composition Quality accounting is (1%~45%)：(1%~22.5%)：(1%~22.5%).

2. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 1, its feature Be, the quality accounting of the butachlor, Oxyfluorfen and symetryne three in herbicidal composition for (2%~ 22.5%)：(2%~11%)：(2%~11%).

3. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 1 or 2, its Be characterised by, the mass accumulation of the butachlor, Oxyfluorfen and symetryne for the composition gross mass 3%~ 90%.

4. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 3, its feature It is, the mass accumulation of the butachlor, Oxyfluorfen and symetryne is the 6%~33.5% of the composition gross mass.

5. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 1, its feature It is, the combination dosage form includes missible oil, water dispersible granules, wettable powder, pulvis, granule, suspending agent and dispersible Oil-suspending agent.

6. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 1, its feature It is, described herbicidal composition is in transplanting rice field and rice seedling bed and rice transplanting rice field annual grassy weeds is prevented and kill off Application.

7. a kind of herbicidal composition containing butachlor, Oxyfluorfen and symetryne according to claim 6, its feature It is, it is grassy weed, broad leaved weed and Sha that described herbicidal composition, which is applied to transplanting rice field annual grassy weeds, Careless section weeds.