CN107372562A - A kind of herbicidal composition of pendimethalin, clomazones and pyrazosulfuron - Google Patents

Abstract

The invention discloses a kind of pendimethalin, clomazones and the herbicidal composition of pyrazosulfuron, are related to the herbicide for preventing and treating direct seading rice field annual grassy weeds and barnyard grass.Three's weight ratio is (1~88)：(1~88)：(1~88), preferred weight ratio are (30~60)：(10~20)：(2~4)；The cumulant of pendimethalin, clomazones and pyrazosulfuron is the 1%~88% of composition total weight, and preferable accounting is 7%~42%.The present invention to the component of pendimethalin, clomazones and pyrazosulfuron in herbicidal composition by carrying out rational proportion, make the effect enhancing of the herbicidal composition property of medicine, it is more preferable to the preventive effect of direct sowing rice weed, expand the control of weeds spectrum of direct sowing rice field simultaneously, reduce direct sowing rice field spraying times, reduce cost accounting, reduce the Weed Resistance risk of direct sowing rice field, the pollution to environment is reduced, it is good to crop safety, meet the security requirement of pesticidal preparations.

Description

A kind of herbicidal composition of pendimethalin, clomazones and pyrazosulfuron

Technical field

The present invention relates to a kind of pendimethalin, clomazones and the herbicidal composition of pyrazosulfuron, and in particular to a kind of For preventing and treating the herbicide of direct seading rice field annual grassy weeds and barnyard grass, it is by pendimethalin, clomazones and the phonetic sulphur of pyrrole The grand ternary herbicidal composition for 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, clomazone, clomazones, benthiocarb with barnyard grass, recently, moleplant seed, The common weeds such as Cyperaceae, Pontederiaceae, the Alismataceaes such as firefly Lin, angustifolia arrowhead herb, Monochoria korsakowii, different in nature nutgrass flatsedge grass are to sulfonylurea herbicide Agent generates resistance, makes weeding problem more complicated.2. perennial weeds harm turns into major issue, particularly Cyperaceae is perennial Weeds are 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 needs to be expanded, And extend the lasting phase that soil prevents and kill off medicament.5. for wide spectrum, selectivity herbicide kind strong, easy to use demand more Urgently.

Pendimethalin, English name：Pendimethalin.Pendimethalin is dry land herbicide after bud before selective bud.It is miscellaneous Grass absorbs medicament by young shoot, stem and root.Pendimethalin is effective to most of dry lands 1 year raw grass family and broad leaved weed, to more Year, raw weeds effect was poor.The pendimethalin scope of application is applied to a variety of dry crops such as corn and soybean, wheat, peanut, cotton and prevented Except 1 year raw grass family and broad leaved weed such as lady's-grass, barnyard grass, green bristlegrass, setaria glauca, purslane, lamb's-quarters.

Clomazone, physicochemical property：Water white transparency is to light brown thick liquid, 25 DEG C of fusing point, 275.4 DEG C of boiling point, density 1.129 (20 DEG C), vapour pressure 19.2mPa (25 DEG C), solubility 1.1g/l in water (25 DEG C of) , clomazones can with acetone, acetonitrile, Chloroform, cyclohexanone, dichloromethane, methanol, toluene etc. mutually mix.Stored under clomazone normal temperature at least 2 years, 50 DEG C can preserve 3 Month, prevent and kill off grass family and broad leaved weed for legume.

Pyrazosulfuron fusing point：181~182 DEG C, vapour pressure (25 DEG C)：0.0147mPa, solubility (mg/L, 20 DEG C)：Water 4.5, acetone 3.17 × 10, chloroform 2.34 × 10, ethane 0.2 × 10, methanol 0.7 × 10.Pyrazosulfuron stability：In 50 DEG C of bars It can stablize half a year under part, it is stable to light.Pyrazosulfuron belongs to sulfonylurea herbicide, is selective inner-adsorption conduction-type herbicide, Mainly absorbed by root system, shifted rapidly in weeds plant body, suppress growth, weeds are gradually dead.Rice can decompose this Medicament, paddy growth is had little to no effect.

In actual use, when pendimethalin, clomazones and pyrazosulfuron are used alone, to the duck of direct sowing rice field The drug effect of tongue grass, moleplant seed, lady's-grass, eleusine indica etc. is not very notable.Therefore, inventor is by pendimethalin, clomazones Rational mixture is carried out with pyrazosulfuron, discovery has notable synergy, expands control of weeds spectrum, direct seading rice field is prevented and kill off in a dispenser Grass family, Cyperaceae and broad leaved weed, spraying times are reduced, reduce the effect of cost accounting.

The content of the invention

It is right it is an object of the invention to provide a kind of pendimethalin, clomazones and the herbicidal composition of pyrazosulfuron Three's component carries out rational proportion, makes the effect enhancing of the herbicidal composition property of medicine, more preferable to the preventive effect of direct sowing rice weed, It is not likely to produce the resistance to the action of a drug.

Another object of the present invention is to provide above-mentioned composition to be used to prevent and kill off direct seading rice field and rice seedling bed, rice transplanting Purposes in rice terrace and transplanting rice field grassy weed, broad leaved weed and 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 pendimethalin, clomazones and the herbicidal composition of pyrazosulfuron, contains active component Pendimethalin, the pyrazosulfuron containing active component clomazones and containing active component, three's weight ratio are (1~88)： (1~88)：(1~88)；Further, the weight of pendimethalin, clomazones and pyrazosulfuron three ratio are (30~60)： (10~20)：(2~4).

The cumulant of the active component of pendimethalin, clomazones and pyrazosulfuron is the 1% of the composition total weight ~88%；Further, the cumulant of the active component of pendimethalin, clomazones and pyrazosulfuron is the composition gross weight The 7%~42% of amount.

According to method known in those skilled in the art, a kind of pendimethalin, clomazones of the present invention and pyrazosulfuron Herbicidal composition practical application when can be configured to any formulation for agriculturally allowing, preparation formulation is microcapsule suspending agent, water Dispersible granule, wettable powder, pulvis, granule, suspending agent, dispersible oil-suspending agent.

For suspending agent and dispersible oil-suspending agent, those skilled in the art are very familiar with completing using corresponding auxiliary agent The present invention.

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, TERSPSE 2500 (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.

To microcapsule suspending agent, can be prepared using interfacial polymerization.Interfacial polymerization is that cyst wall film formation reaction occurs On immiscible oil-water two-phase interfaces, reaction can be carried out at normal temperatures.The basic process of this method is, first by film formation reaction Oil-soluble high polymer monomer used, it is dissolved in agricultural chemicals crude oil and forms so-called organic phase (if agricultural chemicals is not oily liquids But solid, then should first dissolve it in in the immiscible organic solvent of water).Then, this organic is added to emulsifying agent, water Under the conditions of high speed shear, oil-in-water emulsion is formed.Again into this emulsion, water miscible high polymer monomer is added.Then, It can occur in normal temperature condition at the oil-water interface in emulsion particle, generate the polymerisation of cyst membrane, polymeric membrane is by agricultural chemicals Composition and water segregation.Reaction finishes, after adding appropriate appropriate auxiliary agent modulation, you can final preparation is made.

Further, herbicidal composition is preventing and kill off direct seading rice field and rice seedling bed, rice transplanting rice terrace and transplanting water Application between rice field in annual grassy weeds.

Further, it is that grassy weed, broad-leaved are miscellaneous that herbicidal composition, which is applied to direct seading rice field annual grassy weeds, Grass and sedge weed.

The invention has the advantages that：

1st, the present invention to the component of pendimethalin, clomazones and pyrazosulfuron in herbicidal composition by closing Reason proportioning, make the effect enhancing of the herbicidal composition property of medicine, it is more preferable to the preventive effect of direct sowing rice weed, while expand Direct-seeding Rice The control of weeds spectrum in field, reduces direct sowing rice field spraying times, reduces cost accounting, reduce the Weed Resistance wind of direct sowing rice field Danger, reduces the pollution to environment, good to crop safety, meets the security requirement of pesticidal preparations.

2nd, it is of the invention to most of live water such as direct seading rice field Monochoria vaginalis, moleplant seed, lady's-grass, eleusine indica, barnyard grass Weeds in paddy field all has 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 two The clever, clomazones of first penta and pyrazosulfuron have carried out Toxicity Determination research, and specific method is that indoor pot method carries out cauline leaf Processing, test reference《The part of farm-chemical indoor determination test rule herbicide the 9th》.

1.1 reagent agent

95% pendimethalin active compound；95% clomazone active compound；95% pyrazosulfuron active compound.

1.2 for examination weeds

Monochoria vaginalis (category Pontederiaceae)

Moleplant seed (category grass family Sprangletop)

Barnyard grass (category grass family Echinochloa)

1.3 experimental design

The experiment sets 14 processing altogether, and wherein pendimethalin, clomazones and pyrazosulfuron sets 2.0,4.0 grams/public affairs respectively Just 2 dosage processing, pendimethalin, clomazones are mixed with pyrazosulfuron three to be set up separately：

2.0+2.0+2.0,2.0+2.0+4.0,4.0+2.0+2.0,4.0+2.0+4.0 gram/ha；

2.0+4.0+2.0,2.0+4.0+4.0,4.0+4.0+2.0,4.0+4.0+4.0 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 the Monochoria vaginalis of last year field collection, moleplant seed, the immersion of barnyard grass seed 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. Put in weeds Monochoria vaginalis, moleplant seed, barnyard grass 3-5 leaves in spray tower spray (ASS-1 type pesticide spraying systems, DG8203 shower nozzles, Atomisation pressure 2.75MPA, spouting liquid 40kg/ mu), 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 pendimethalin

Y represents the Weed-control effect of the Ji clomazones of herbicide 2

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

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 pendimethalin single dose is slowed down, and Monochoria vaginalis, moleplant seed start Huang occur Change symptom to wither therewith until dead；The barnyard grass terminal bud of the Tian clomazones of dispenser 7 processing reddens, and starts dead, moleplant seed, duck tongue Careless terminal bud has the different degrees of symptom that reddens；The barnyard grass terminal bud of dispenser pyrazosulfuron processing in 8 days reddens, and starts dead, a thousand pieces of gold Son, Monochoria vaginalis 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 pendimethalin clomazone pyrazosulfuron of table 1 uses the visual observation (level) of 14 days Monochoria vaginalis after medicine with

Pendimethalin clomazone pyrazosulfuron	Ai.g/ha
		2.0+2.0+2.0	9
2.0+2.0+4.0	6
		4.0+2.0+2.0	5
4.0+2.0+4.0	5
		2.0+4.0+2.0	5
2.0+4.0+4.0	3
		4.0+4.0+2.0	2
4.0+4.0+4.0	1

The pendimethalin clomazone pyrazosulfuron of table 2 uses the visual observation (level) of 14 days moleplant seeds after medicine with

Pendimethalin clomazone pyrazosulfuron	Ai.g/ha
		2.0+2.0+2.0	9
2.0+2.0+4.0	6
		4.0+2.0+2.0	5
4.0+2.0+4.0	5
		2.0+4.0+2.0	5
2.0+4.0+4.0	3
		4.0+4.0+2.0	2
4.0+4.0+4.0	1

The pendimethalin clomazone pyrazosulfuron of table 3 uses the visual observation (level) of 14 days barnyard grasses after medicine with

Pendimethalin clomazone pyrazosulfuron	Ai.g/ha
		2.0+2.0+2.0	9
2.0+2.0+4.0	6
		4.0+2.0+2.0	5
4.0+2.0+4.0	5
		2.0+4.0+2.0	5
2.0+4.0+4.0	3
		4.0+4.0+2.0	2
4.0+4.0+4.0	1

21 days investigation results after 2.3 medicines

The pendimethalin clomazone pyrazosulfuron of table 3 is mixed to the actual survival rate of Monochoria vaginalis and theoretical survival rate

The mixed virulence to Monochoria vaginalis of pendimethalin, clomazones, pyrazosulfuron：Pendimethalin to the preventive effect of Monochoria vaginalis compared with It is good, it is that the sensitive medicaments , clomazones of weeds are general to the preventive effect of Monochoria vaginalis, pyrazosulfuron is general to the preventive effect of Monochoria vaginalis, with The increase of pendimethalin, clomazone, pyrazosulfuron dosage, the preventive effect of Monochoria vaginalis is improved after using with.Use with as seen from Table 3 Actual preventive effect difference is generally higher than 10% afterwards, is in synergistic effect to the preventive effect of Monochoria vaginalis after three is mixed.

The mixed actual survival rate to moleplant seed of the pendimethalin clomazone pyrazosulfuron of table 4 and theoretical survival rate

The mixed virulence to moleplant seed of pendimethalin, clomazones pyrazosulfuron：Pendimethalin, clomazones, pyrrole are phonetic The grand preventive effect to moleplant seed of sulphur is general, with the increase of pendimethalin, clomazone, pyrazosulfuron dosage, to a thousand pieces of gold after using with The preventive effect of son greatly improves.Actual preventive effect difference after using with as seen from Table 4 is generally higher than 10%, to moleplant seed after three is mixed Preventive effect be in synergistic effect.

The mixed actual inhibiting rate to barnyard grass of the pendimethalin clomazone pyrazosulfuron of table 5 and theoretical inhibiting rate

The mixed virulence to barnyard grass of pendimethalin, clomazones, pyrazosulfuron：Pendimethalin is excellent to the preventive effect of barnyard grass, There is stronger inhibitory action to barnyard grass for the susceptible weeds , clomazones of medicament, pyrazosulfuron has stronger suppression to make to barnyard grass With with the increase of pendimethalin, clomazone, pyrazosulfuron dosage, being greatly improved after mixed to the preventive effect of barnyard grass.From table 5 Find out that the actual preventive effect difference after using with is more than 10%, be in synergistic effect to the preventive effect of barnyard grass after three is mixed.

As can be seen from the above test results, pendimethalin, clomazones, pyrazosulfuron are used with, to Monochoria vaginalis, a thousand pieces of gold Son, barnyard grass are in synergistic effect, mixed to expand herbicide controlling spectrum, delay Weed Resistance, reduce pendimethalin Yu clomazone, pyrrole are phonetic The two grand single dose content of sulphur, improves total preventive effect, reduces application cost, and safer to crop, the two is used with and had in production Certain feasibility.

Example of formulations 1

Weigh 3% clomazone, 3% pendimethalin, 3% pyrazosulfuron, 1.5%NNO, 1%TERSPERSE2500,2% 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% 2 is made after being sanded with sand mill The Ling clomazone pyrazosulfuron suspending agents of first penta.

Example of formulations 2

Weigh 3% clomazone, 3% pendimethalin, 3% pyrazosulfuron, 1.5% xanthans, 5% ethylene glycol, 2.5% benzene Formic acid, 2.5% organic silicon defoamer, water disperse 30min in high speed shear, form oil-in-water emulsion.Again into this emulsion, Add 20% polyvinyl alcohol.Cyst membrane can be generated at the oil-water interface in emulsion particle in normal temperature condition, and polymeric membrane is by agriculture Medicine composition and water segregation.Reaction finishes, and 9% pendimethalin clomazone is made after adding appropriate appropriate auxiliary agent modulation Pyrazosulfuron microcapsule suspending agent.

Example of formulations 3

Weigh 3% clomazone, 3% pendimethalin, 3% pyrazosulfuron, 2% dispersing agent NNO, 3% agriculture breast 2201#, 8% 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, and high speed shear disperses 30min, and 9% pendimethalin Yi Evil grass is made after being sanded with sand mill The loose dispersible oil-suspending agent of pyrazosulfuron.

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

Inventor has carried out the different Evil grass of 9% pendimethalin on June 6th, 2011 in Jiaxing City, Zhejiang Province rice direct seeding field Experiment of loose pyrazosulfuron (3%+3%+3%) microcapsule suspending agent to paddy field weed.Field main weeds have Eclipta prostrata, rain long Flower, Monochoria vaginalis, difformed galingale herb and moleplant seed, weed size is in the 2-4 leaf phases.Test medicine and dosage are that 9% pendimethalin is different The loose pyrazosulfuron microcapsule suspending agent 25g/ mus of Evil grass, 50g/ mus, 25g/ rise the dispersible oil suspending agent 60ml/ mus of pendimethalin, 10% clomazone wettable powder 25g/ mus, 10% pyrazosulfuron wettable powder 25g/ mus.Using conventional spray-on process.

The dispersible oil-suspending agent of pendimethalin clomazone pyrazosulfuron of table 6 9% is to rice direct seeding field weed control Effect

The dispersible oil-suspending agent of pendimethalin clomazone pyrazosulfuron of table 7 9% is to rice direct seeding field weed control Effect

The dispersible oil suspending agent of pendimethalin clomazone pyrazosulfuron of table 8 9% is imitated to rice direct seeding field weed control Fruit

Result of the test shows：30 after the dispersible oil suspending agent 50g/ mu medicines of 9% pendimethalin clomazone pyrazosulfuron Its average strain preventive effect and fresh weight preventive effect to Monochoria korsakowii, Monochoria vaginalis, Eclipta prostrata, moleplant seed, barnyard grass is all remarkably higher than comparison medicament 25g/ rises the dispersible oil suspending agent 60ml/ mus of pendimethalin, 10% clomazone wettable powder 25g/ mus, 10% pyrazosulfuron can WP 25g/ mus, 10% pyrazosulfuron wettable powder 25g/ mus, illustrate in crop field in have after three medicament mixtures bright Aobvious synergistic 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 (7)

1. the herbicidal composition of a kind of pendimethalin, clomazones and pyrazosulfuron, it is characterised in that contain active component Pendimethalin, the pyrazosulfuron containing active component clomazones and containing active component, three's weight ratio are (1~88)： (1~88)：(1~88).

2. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 1 and pyrazosulfuron, its feature It is, the weight ratio of the pendimethalin, clomazones and pyrazosulfuron three are (30~60)：(10~20)：(2~4).

3. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 1 or 2 and pyrazosulfuron, its It is characterised by, the cumulant of the active component of the pendimethalin, clomazones and pyrazosulfuron is the composition total weight 1%~88%.

4. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 3 and pyrazosulfuron, its feature It is, the cumulant of the active component of the pendimethalin, clomazones and pyrazosulfuron is the 7% of the composition total weight ~42%.

5. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 1 and pyrazosulfuron, its feature It is, the combination dosage form includes microcapsule suspending agent, dispersible oil-suspending agent and water dispersible granules, wettable powder, powder Agent and granule.

6. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 1 and pyrazosulfuron, its feature It is, described herbicidal composition is preventing and kill off direct seading rice field and rice seedling bed, rice transplanting rice terrace and transplanting rice field Application in annual grassy weeds.

7. the herbicidal composition of a kind of pendimethalin, clomazones according to claim 6 and pyrazosulfuron, its feature It is, described herbicidal composition is grassy weed, broad leaved weed and Sha applied to direct seading rice field annual grassy weeds Careless section weeds.