CN101642123B - Herbicide composition for paddy fields - Google Patents

Herbicide composition for paddy fields Download PDF

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Publication number
CN101642123B
CN101642123B CN 200910023665 CN200910023665A CN101642123B CN 101642123 B CN101642123 B CN 101642123B CN 200910023665 CN200910023665 CN 200910023665 CN 200910023665 A CN200910023665 A CN 200910023665A CN 101642123 B CN101642123 B CN 101642123B
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China
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weeds
bensulfuron
methyl
penoxsuam
preventing
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CN 200910023665
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Chinese (zh)
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CN101642123A (en
Inventor
郑敬敏
何爱华
冯建雄
时晓磊
张武
张崇斌
孙瑞
赵海军
梅红玉
乌小瑜
段莹
苏蓓
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陕西上格之路生物科学有限公司
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Abstract

The invention relates to a herbicide composition for preventing and removing weeds in farmlands and an application, in particular to a herbicide used for preventing and removing gramineous weeds, broadleaf weeds and sedge weeds in paddy fields. The herbicide composition is a binary herbicide mixed agent taking penoxsulam and bensulfuron methyl as active components. The weight ratio of the penoxsulam to the bensulfuron methyl in the composition is 1.6:1-1:40, preferably 1.6:1-1:10. The compound herbicide can be prepared into water dispersed granules, a suspending agent, an oil suspending agent and wettable powder. The invention is used for preventing and removing the weeds in the paddy fields, has reasonable components and better preventing effect in comparison with the activity of the components when being applied independently, expands the preventing and removing spectra of the weeds, lowers the preventing and removing cost, delays the generation of the resistibility of the weeds, has good safety to crops and conforms to the safety requirement of pesticide preparations. The invention has the fresh-weight average preventing and treating effect of 87.35-98.01% to the gramineous weeds, the broadleaf weeds and the sedge weeds in the paddy fields after being applied for thirty days.

Description

A kind of herbicide composition for paddy fields

Technical field

The present invention relates to a kind of herbicide composition for paddy fields, be specifically related to a kind of for control rice field grassy weed, broad leaved weed and sedge weed weed killer herbicide, it is to be the binary herbicidal composition of Active components by penoxsuam, bensulfuron-methyl.

Background technology

Large-area applications 2 from about the nineteen fifty, 4-drips, since 2 first 4 chlorine are prevented and kill off the paddy field broad leaved weed, paddy field develops rapidly with the weed killer herbicide kind, kind updates, perfect, successively emerge in large numbers the weed killer herbicides such as diphenyl ether, thiocarbamates, amide-type, quinoline carboxylic acid, sulfonylurea, formed the comparatively perfect Chemical Weeding System that is adapted to the paddy rice different planting, become well stimulation indispensable, very important in world's Rice Production.

But, along with numerous weed killer herbicide kinds continue to use in the paddy field large tracts of land, also produce many problems: 1. Weed Resistance is outstanding, wherein comparatively outstanding to the resistance of Stam F-34, dichloro quinolinic acid, butachlor, benthiocarb with barnyard grass, recently, the common weeds such as sedge family, Pontederiaceae, Alismataceae such as difformed galingale herb, firefly Lin, arrowhead, Monochoria korsakowii, Monochoria vaginalis have produced resistance to sulfonylurea herbicide, make the weeding problem more complicated.2. perennial weed harm becomes major issue, and particularly the sedge family perennial weed is more outstanding.3. advanced age barnyard grass and moleplant seed the problem of preventing and kill off need solve; 4. the herbicide of weed killer herbicide kind spectrum remains to be enlarged, and extends the lasting phase that soil is prevented and kill off medicament.5. more urgent for the demand of wide spectrum, selectivity weed killer herbicide kind strong, easy to use.

Use weed killer herbicide after the seedling that penoxsuam system is developed by U.S. Tao Nongke company (Dow AgroSciences), it causes effect by inhibition acetolactate synthestase (ALS).On September 24th, 2004 is in U.S. EPA official register registration, applies in southern US rice district, registers in China in 2008 in 2005.this medicament can very effectively be prevented and kill off barnyard grass and (comprise Stam F-34, the barnyard grass of dichloro quinolinic acid and anti-acetyl-CoA carboxylase tool resistance), moleplant seed and annual sedge weed, simultaneously, it also can prevent and kill off anti-bensulfuron-methyl weeds in paddy field, and many broad-leaveds and sedge weed and barnyard grass etc. had residual activity, for present paddy field is composed the widest kind with herbicide in weed killer herbicide, but use cost is high, limiting its spread uses, therefore penoxsuam and another kind of combinations of herbicides is composite, improve drug effect, enlarge the control of weeds spectrum, reduce usage amount, enlarging using of this medicament is present urgent problem.

The English common name penoxsulam of penoxsuam, chemical name 2-(2,2-difluoro ethoxy)-N-(5,8-dimethoxy (1,2,4) triazole-(1,5-C) pyrimidine-2-base)-6-trifluoromethyl-benzene sulfanilamide (SN).Penoxsuam is a kind of triazolopyrimidine sulfonamide weed killer herbicide, works by suppressing the acetyl-lactic acid ester synzyme, and medicine conducts to meristematic tissue via grass cutting blade, sheath section or root absorption, causes weed growth to stop, and yellow is then dead.Be used for preventing and kill off the paddy field annual weed, to the barnyard grass special efficacy, but to the anti-heterodyne of part grassy weed, nutgrass flatsedge and broad leaved weed.The action target of this medicament is acetolactate synthestase (ALS), according to the hodgepodge of the anti-sulfonylurea herbicide of reported literature to the cross resistance level of triazolopyrimidine sulfonamides herbicide significantly lower than to other sulfonylurea medicaments, and the activity of weeding of penoxsuam and other ALS inhibitor have obvious difference.Therefore penoxsuam is the comparatively ideal weed killer herbicide of control paddy field weed.

The English common name bensulfuron-methyl of bensulfuron-methyl, molecular formula C 14H 13NO 7S, chemical name α-{ [(4,6-dimethoxypyridin-α-yl) amino carbonyl amino] sulfonyl methyl } methyl benzoate.Bensulfuron-methyl is a kind of selectivity inner-adsorption conduction-type herbicide.Active ingredient can be in water diffusion rapidly, for weeds root and blade absorb weeds each one of transferring to, the biosynthesis of hindered aminoacid, lysine, isoleucine stops division and the growth of cell.The susceptible weeds GF is obstructed, and tender tissue turns to be yellow too early and suppresses the growth of leaf section, hinders root growth and necrosis.It is harmless inertia chemicals that active ingredient enters the interior metabolism rapidly of paddy rice body, to rice safety.be mainly used in the direct seading rice field, the rice seedling bed, the transplanting rice field, the rice transplanting paddy field is prevented and kill off annual and perennial broadleaf weed and nutgrass flatsedge, especially good to mexicana and needle spikesedge herb texts spy, under high dose, the grassy weeds such as barnyard grass there is strong inhibition growth, to working as a stubble rice safety, without pedo relict, also very safe to succession crop, as the outstanding kind in a herbicide for paddy field single dose, advantage is a lot, but blemish in an otherwise perfect thing is without killing action to grassy weed such as barnyard grass, the Weed Resistance that causes after using for many years rises year by year, use cost is higher.

In actual use, the barnyard grass special efficacy of penoxsuam to rice field, but not satisfactory to part broad leaved weed, nutgrass flatsedge preventive effect; Bensulfuron-methyl has preventive effect preferably as a kind of herbicide for paddy field commonly used to broad leaved weed, nutgrass flatsedge, but because the resistance problem usage amount increases year by year, and to grassy weed such as barnyard grass without killing action.Therefore, penoxsuam, bensulfuron-methyl are carried out rational mixture, have the control of weeds of expansion spectrum, reduce spraying times, reduce the effect of cost accounting, to rice safety.

Summary of the invention

The object of the present invention is to provide a kind of component reasonable, drug cost is low, the herbicide composition for paddy fields that is difficult for developing immunity to drugs.

Another object of the present invention is to provide above-mentioned composition to be used for preventing and kill off the purposes of rice seedling bed, direct seading rice field, rice transplanting paddy field and transplanting rice field grassy weed and broad leaved weed, sedge weed.

In order to overcome the defective of existing unitary agent, technical scheme of the present invention is to solve like this:

The present invention contains active component penoxsuam, bensulfuron-methyl, and wherein penoxsuam and the bensulfuron-methyl weight ratio between both is 1.6: 1~1: 40, preferably 1.6: 1~1: 10.The cumulant of penoxsuam, bensulfuron-methyl is 0.1%~80% of described composition total weight, is preferably 2%~20%.

According to method known in those skilled in the art, can be mixed with the upper any formulation that allows of agricultural during herbicide composition for paddy fields practical application of the present invention, preparation formulation is water dispersible granules, suspending agent, oil-suspending agent or wetting powder.

For water dispersible granules, those skilled in the art are familiar with the corresponding auxiliary agent of use and complete the present invention very much.In dispersant such as polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate one or more; In wetting agent such as alkyl sulfate, alkylsulfonate, naphthalene sulfonate one or more; In disintegrant such as ammonium sulfate, urea, sucrose, glucose one or more; One or more in binding agent such as diatomite, corn starch, PVA, carboxymethyl (ethyl) cellulose family; Filler such as diatomite, kaolin, white carbon, fine particle calcium carbonate, talcum powder, attapulgite, potter's clay one or more.

To suspending agent, spendable auxiliary agent has: in dispersant such as polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate (dispersing agent NNO), TERSPERSE 2425 (U.S. Huntsman Corporation produces, the alkyl naphthalene sulfonic acid salt) one or more; Alkyl phenol formaldehyde resin polyoxyethylene ether), agriculture breast 2201, this dish-60# (common name: Span60), Tween-60 # (common name: the polyoxyethylene sorbitan stearate), agriculture breast 1601# (common name: triphen ethyl-phenol polyoxyethylene polyoxypropylene block polymer), one or more in TERSPERSE 4894 (U.S. Huntsman Corporation product) emulsifier such as Nongru-700 # (common name:; In wetting agent such as alkylphenol-polyethenoxy base ether formaldehyde condensation products sulphate, alkylphenol-polyethenoxy base ether phosphate, phenethyl phenol polyethenoxy base ether phosphate, alkyl sulfate, alkylsulfonate, naphthalene sulfonate, TERSPERSE 2500 (U.S. Huntsman Corporation product) one or more; In thickener such as xanthans, polyvinyl alcohol, bentonite, aluminium-magnesium silicate one or more; In preservative such as formaldehyde, benzoic acid, Sodium Benzoate one or more; Defoamer such as organic silicon defoamer; In antifreezing agent such as ethylene glycol, propane diols, glycerine, urea, inorganic salts such as sodium chloride one or more.

To oil-suspending agent, spendable auxiliary agent has: in dispersant such as polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, TERSPERSE 2425 (U.S. Huntsman Corporation produces, the alkyl naphthalene sulfonic acid salt) one or more; emulsifier such as Nongru-700 # (common name: alkyl phenol formaldehyde resin polyoxyethylene ether, agriculture breast 2201, this dish-60# (common name sorbitan monostearate), Tween-60 # (common name: the sorbitan fatty acid ester APEO), agriculture breast 1601# (common name: triphen ethyl-phenol polyoxyethylene polyoxypropylene block polymer), one or more in TERSPERSE 4894 (U.S. Huntsman Corporation product) TERSPERSE 2500 (U.S. Huntsman Corporation product), in wetting agent such as alkylphenol-polyethenoxy base ether formaldehyde condensation products sulphate, alkylphenol polyoxyethylene phosphate, phenethyl phenol polyethenoxy base ether phosphate, alkyl sulfate, alkylsulfonate, naphthalene sulfonate, TERSPERSE 2500 (U.S. Huntsman Corporation product) one or more, in thickener such as white carbon, polyvinyl alcohol, bentonite, aluminium-magnesium silicate one or more, in antifreezing agent such as ethylene glycol, propane diols, glycerine, urea, inorganic salts such as sodium chloride one or more, in dispersion medium such as soybean oil, rapeseed oil, corn oil, methyl oleate, castor oil one or more.

To wetting powder, spendable auxiliary agent has: in dispersant such as polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate one or more; In wetting agent such as alkyl sulfate, alkylsulfonate, naphthalene sulfonate one or more; Filler such as ammonium sulfate, urea, sucrose, glucose, diatomite, kaolin, white carbon, fine particle calcium carbonate, talcum powder, attapulgite, potter's clay one or more.

Component of the present invention is reasonable, and the activity that preventive effect is better than each component when using separately has synergistic effect, enlarge the control of weeds spectrum, reduce spraying times, reduce cost accounting, the generation that slows down Weed Resistance, good to crop safety, meet the security requirement of pesticidal preparations.The present invention had 87.35%~98.01% the average control efficiency of fresh weight in 30 days after to rice field grassy weed broad leaved weed and sedge weed medicine.

Embodiment

Below in conjunction with embodiment, content of the present invention is described further.

FORMULATION EXAMPLE 1:

Take 5% penoxsuam, 5% bensulfuron-methyl, 3%TERSPERSE 2700 (polycarboxylate, U.S. Huntsman Corporation produces), 2% dispersing agent NNO (alkylnaphthalene sulfonate formaldehyde condensation products), 3% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 3% White Carbon black, 5% sulphur ammonium, diatomite adds to 100% weight portion.The method of the frequent regulation of above-mentioned raw materials water intaking dispersible granule is namely mixed, ultra micro air-flow crushing, mixing, granulation step are produced 10% penoxsuam bensulfuron-methyl water dispersible granules.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 10%, form new embodiment.

FORMULATION EXAMPLE 2

Take 1.5% penoxsuam, 60% bensulfuron-methyl, 5%TERSPERSE 2700 (polycarboxylate, U.S. Huntsman Corporation produces), 3% dispersing agent NNO (alkylnaphthalene sulfonate formaldehyde condensation products), 4% Nekal BX (nekal), 4%K-12 (lauryl sodium sulfate), 3% White Carbon black, 5% sulphur ammonium, diatomite adds to 100% weight portion.The method of the frequent regulation of above-mentioned raw materials water intaking dispersible granule is namely mixed, ultra micro air-flow crushing, mixing, granulation step are produced 61.5% penoxsuam bensulfuron-methyl water dispersible granules.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 61.5%, form new embodiment.

FORMULATION EXAMPLE 3:

Take 16% penoxsuam, 10% bensulfuron-methyl, 5%TERSPERSE 2700 (polycarboxylate, U.S. Huntsman Corporation produces), 2% dispersing agent NNO (alkylnaphthalene sulfonate formaldehyde condensation products), 2% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 3% White Carbon black, 5% sulphur ammonium, diatomite adds to 100% weight portion.The method of the frequent regulation of above-mentioned raw materials water intaking dispersible granule is namely mixed, ultra micro air-flow crushing, mixing, granulation step are produced 26% penoxsuam bensulfuron-methyl water dispersible granules.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 26%, form new embodiment.

FORMULATION EXAMPLE 4

Take 2.5% penoxsuam, 5% bensulfuron-methyl, 3%TERSPERSE 4894 (U.S. Huntsman Corporation product), 2%TERSPERSE 2500 (U.S. Huntsman Corporation product), 3%TERSPERSE2425 (U.S. Huntsman Corporation product), 3% white carbon, 5% ethylene glycol, soybean oil adds to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with making 7.5% penoxsuam bensulfuron-methyl oil-suspending agent after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 7.5%, form new embodiment.

FORMULATION EXAMPLE 5

Take 3% penoxsuam, 2% bensulfuron-methyl, 3%TERSPERSE 4894 (U.S. Huntsman Corporation product), 2%TERSPERSE 2500 (U.S. Huntsman Corporation product), 3%TERSPERSE2425 (U.S. Huntsman Corporation product), 3% bentonite, 5% glycerine, methyl oleate and add to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with making 5% penoxsuam bensulfuron-methyl oil-suspending agent after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 5%, form new embodiment.

FORMULATION EXAMPLE 6

Take 0.3% penoxsuam, 10% bensulfuron-methyl, 4%TERSPERSE 4894 (U.S. Huntsman Corporation product), 3%TERSPERSE 2500 (U.S. Huntsman Corporation product), 3%TERSPERSE 2425 (U.S. Huntsman Corporation product), 3% white carbon, 5% glycerine, castor oil and add to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with making 10.3% penoxsuam bensulfuron-methyl oil-suspending agent after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 10.3%, form new embodiment.

FORMULATION EXAMPLE 7

Take 10% penoxsuam, 70% bensulfuron-methyl, 5% calcium lignosulfonate, 2% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 5% White Carbon black, kaolin and add to 100% weight portion.Above-mentioned raw materials makes 80% penoxsuam bensulfuron-methyl wetting powder through mixing after air-flow crushing.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 80%, form new embodiment.

FORMULATION EXAMPLE 8

Take 2% penoxsuam, 13% bensulfuron-methyl, 4% calcium lignosulfonate, 3%TERSPERSE2700 (polycarboxylate, U.S. Huntsman Corporation produces), 2% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 3% White Carbon black, kaolin adds to 100% weight portion.Above-mentioned raw materials makes 15% penoxsuam bensulfuron-methyl wetting powder through mixing after air-flow crushing.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 15%, form new embodiment.

FORMULATION EXAMPLE 9

Take 1% penoxsuam, 1% bensulfuron-methyl, 5% calcium lignosulfonate, 5% dispersing agent NNO (alkylnaphthalene sulfonate formaldehyde condensation products), 2% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 5% White Carbon black, attapulgite and add to 100% weight portion.Above-mentioned raw materials makes 2% penoxsuam bensulfuron-methyl wetting powder through mixing after air-flow crushing.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 2%, form new embodiment.

FORMULATION EXAMPLE 10

Take 6% penoxsuam, 14% bensulfuron-methyl, 5% calcium lignosulfonate, 5% dispersing agent NNO (alkylnaphthalene sulfonate formaldehyde condensation products), 2% Nekal BX (nekal), 2%K-12 (lauryl sodium sulfate), 5% White Carbon black, attapulgite and add to 100% weight portion.Above-mentioned raw materials makes 20% penoxsuam bensulfuron-methyl wetting powder through mixing after air-flow crushing.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 20%, form new embodiment.

FORMULATION EXAMPLE 11

Take 0.04% penoxsuam, 0.06% bensulfuron-methyl, 5% calcium lignosulfonate, 2% Nekal BX (nekal), 3%K-12 (lauryl sodium sulfate), 5% White Carbon black, kaolin and add to 100% weight portion.Above-mentioned raw materials makes 0.1% penoxsuam bensulfuron-methyl wetting powder through mixing after air-flow crushing.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 0.1%, form new embodiment.

FORMULATION EXAMPLE 12

Take 1.5% penoxsuam, 2% bensulfuron-methyl, 3%TERSPERSE 4894 (U.S. Huntsman Corporation product), 1%TERSPERSE 2500 (U.S. Huntsman Corporation product), 2% dispersing agent NNO, 0.3% xanthans, 5% propane diols, 0.5% benzoic acid, 0.5% silicone defoaming agent (trade name: s-29 Nanjing "four news" (new ideas applied chemistry product company produces), deionized water adds to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with the penoxsuam bensulfuron-methyl suspending agent that makes 3.5% after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 3.5%, form new embodiment.

FORMULATION EXAMPLE 13

Take 6% penoxsuam, 4% bensulfuron-methyl, 4%TERSPERSE 4894 (U.S. Huntsman Corporation product), 1.5%TERSPERSE 2500 (U.S. Huntsman Corporation product), 2%TERSPERSE2425 (U.S. Huntsman Corporation product), 0.2% aluminium-magnesium silicate, 5% ethylene glycol, 0.5% formaldehyde, 0.5% silicone defoaming agent (trade name: s-29 Nanjing "four news" (new ideas applied chemistry product company produces), deionized water adds to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with the penoxsuam bensulfuron-methyl suspending agent that makes 10% after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 10%, form new embodiment.

FORMULATION EXAMPLE 14

Take 20% penoxsuam, 25% bensulfuron-methyl, 5%TERSPERSE 4894 (U.S. Huntsman Corporation product), 2%TERSPERSE 2500 (U.S. Huntsman Corporation product), 3%TERSPERSE2425 (U.S. Huntsman Corporation product), 0.2% xanthans, 5% propane diols, 0.5% benzoic acid, 0.5% silicone defoaming agent (trade name: s-29 Nanjing "four news" (new ideas applied chemistry product company produces), deionized water adds to 100% weight portion.Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with the penoxsuam bensulfuron-methyl suspending agent that makes 45% after the sand mill sand milling.

In the present embodiment, the part by weight of penoxsuam and bensulfuron-methyl can change between 1.6: 1~1: 40, and both total weight items are still 45%, form new embodiment.

Biological Examples 1 is prevented and kill off paddy field weed toxicity determination experiment

Indoor measurement to barnyard grass and Eclipta prostrata activity: the former medicinal acetone of penoxsuam and bensulfuron-methyl is dissolved into respectively the 2000ug/ml mother liquor, and add Tween-80 (making emulsifier and spreader), use simultaneously the sample of penoxsuam and bensulfuron-methyl different proportion, in sample, the ratio of penoxsuam and bensulfuron-methyl was respectively 0.1: 1,0.2: 1,1.6: 1,1: 1.25,1: 2.5,1: 5,1: 10,1: 20,1: 40; After adopting seedling, spray-on process is to measure penoxsuam and bensulfuron-methyl and composite sample thereof to the activity of paddy field barnyard grass, to soak with clear water the barnyard grass of 24 hours, seed is sowed in test basin alms bowl by 50 seeds of every alms bowl, by the time barnyard grass 3 leaves fixed 40 strains of every alms bowl during the phase, the medicament that dilution is good evenly is sprayed onto on the barnyard grass plant with laryngeal spray, to decide 20 strains by every alms bowl with the Eclipta prostrata seed that clear water soaked 24 hours simultaneously, the medicament that dilution is good evenly is sprayed onto on the Eclipta prostrata plant with laryngeal spray, evenly thoughtfully to be as the criterion, test repeats 4 times.

The strain number of with medicament processing and control treatment calculates the control efficiency of medicament.

Theoretical preventive effect % (E 0)=X+Y-(X * Y)/100)

The synergy that is mixed: adopt the Gowing method to estimate penoxsuam and the synergy type of bensulfuron-methyl mixture and the reasonability of proportioning.

In formula: the actual preventive effect after X-weed killer herbicide A and weed killer herbicide B are mixed in proportion.

The weeds preventive effect of Y-weed killer herbicide B consumption when Q.

Actual preventive effect after mixture actual measurement preventive effect % (E)=weed killer herbicide A and weed killer herbicide B are mixed in proportion.

E-E 0>10% is synergistic effect; E-E 0<-10% is antagonism; E-E 0Value is summation action between ± 10%.

Table 1: penoxsuam and bensulfuron-methyl and mixture thereof the herbicide effect to barnyard grass

Table 2 penoxsuam and bensulfuron-methyl and mixture thereof the herbicide effect to Eclipta prostrata

Table 1 and table 2 data show: penoxsuam and bensulfuron-methyl were mixed to barnyard grass and Eclipta prostrata E-E0 value all between ± 10% in 1.6: 1~1: 40 o'clock, illustrated that penoxsuam and bensulfuron-methyl are mixed and have summation action.

Biological example 2 is prevented and kill off the paddy field weed field control effectiveness test

The inventor has carried out the test of 7.5% penoxsuam bensulfuron-methyl (2.5%+5%) oil suspending agent to paddy field weed on June 10th, 2008 at the Jiaxing City, Zhejiang Province rice direct seeding field.The field main weeds has Eclipta prostrata, Monochoria korsakowii, Procumbent Falsepimpernel, barnyard grass and difformed galingale herb, and weed size is in 2~4 leaf phases.Test medicine and dosage are 7.5% penoxsuam bensulfuron-methyl oil suspending agent 20ml/ mu, 30ml/ mu, 40ml/ mu, and 25g/ rises penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu.Adopt conventional spray-on process.

Table 3 7.5% penoxsuam bensulfuron-methyl oil suspending agent is to the rice direct seeding field weed control efficacy

Table 4 7.5% penoxsuam bensulfuron-methyl oil suspending agent is to the rice direct seeding field weed control efficacy

Table 5 7.5% penoxsuam bensulfuron-methyl oil suspending agent is to the rice direct seeding field weed control efficacy

Table 4,5 biological Case Experiments On A results show: Monochoria korsakowii, Procumbent Falsepimpernel, Eclipta prostrata, difformed galingale herb, barnyard grass were all had significant preventive effect in 30 days after 7.5% penoxsuam bensulfuron-methyl oil suspending agent medicine, average strain preventive effect and the fresh weight preventive effect of its 20ml/ mu, 30ml/ mu, 40ml/ mu are respectively 85.56% and 87.35%, 89.40% and 90.86%, 95.14% and 97.19%; After contrast medicament 2.5% penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu medicine, strain preventive effect and the fresh weight preventive effect of 30 days are respectively 87.28% and 90.01%, 85.89% and 88.14%.

Result of the test shows: after 7.5% penoxsuam bensulfuron-methyl oil suspending agent 30ml/ mu, 40ml/ mu medicine 30 days to the average strain preventive effect of Monochoria korsakowii, Procumbent Falsepimpernel, Eclipta prostrata, difformed galingale herb, barnyard grass and fresh weight preventive effect all higher than contrast medicament 2.5% penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu, illustrating after two medicaments are mixed has obvious synergistic effect in use in the land for growing field crops, saved simultaneously drug cost.

Biological example 3

The inventor has carried out the test of 15% penoxsuam bensulfuron-methyl (2%+13%) WP on Rice field weed at the Xianju County in Zhejiang Province transplanted rice field on June 25th, 2008.The field main weeds has Eclipta prostrata, Monochoria korsakowii, Procumbent Falsepimpernel, barnyard grass and difformed galingale herb, and weed size is in 2~4 leaf phases.Test medicine and dosage are 15% penoxsuam bensulfuron-methyl wetting powder 10g/ mu, 15g/ mu, 20g/ mu, and 25g/ rises penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu.Adopt conventional spray-on process.

Table 6 15% penoxsuam bensulfuron-methyl WP on Rice transplant field weed control efficacy

Table 7 15% penoxsuam bensulfuron-methyl WP on Rice transplant field weed control efficacy

Table 8 15% penoxsuam bensulfuron-methyl WP on Rice transplant field weed control efficacy

Table 7,8 biological Case Experiments On A results show: Monochoria korsakowii, Procumbent Falsepimpernel, Eclipta prostrata, difformed galingale herb, barnyard grass were all had significant preventive effect in 30 days after 15% penoxsuam bensulfuron-methyl wetting powder medicine, average strain preventive effect and the fresh weight preventive effect of its 10g/ mu, 15g/ mu, 20g/ mu are respectively 87.36% and 87.66%, 91.37% and 93.17%, 96.66% and 98.01%; After contrast medicament 2.5% penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu medicine, strain preventive effect and the fresh weight preventive effect of 30 days are respectively 87.96% and 89.15%, 86.37% and 88.66%.

Result of the test shows: after 15% penoxsuam bensulfuron-methyl wetting powder 15g/ mu, 20g/ mu medicine 30 days to the average strain preventive effect of Monochoria korsakowii, Procumbent Falsepimpernel, Eclipta prostrata, difformed galingale herb, barnyard grass and fresh weight preventive effect all higher than contrast medicament 2.5% penoxsuam oil suspending agent 45ml/ mu, 10% bensulfuron-methyl wetting powder 30g/ mu, illustrating after two medicaments are mixed has obvious synergistic effect in use in the land for growing field crops, saved simultaneously drug cost.

Comprehensively above-mentioned, component of the present invention is reasonable, the activity that preventive effect is better than each component when using separately, field control effectiveness test verifies that its combination has synergistic effect, enlarge the control of weeds spectrum, reduce spraying times, reduce cost accounting, the generation that slows down Weed Resistance, good to crop safety, meet the security requirement of pesticidal preparations.

Claims (2)

1. herbicide composition for paddy fields, it is characterized in that said composition takes following method to prepare: take 2.5% penoxsuam, 5% bensulfuron-methyl, the TERSPERSE 4894 that 3% U.S. Huntsman Corporation produces, the TERSPERSE 2500 that 2% U.S. Huntsman Corporation produces, TERSPERSE 2425,3% white carbon, 5% ethylene glycol that 3% U.S. Huntsman Corporation produces, soybean oil adds to 100% weight portion; Above-mentioned raw materials is through mixing, and high speed shear is disperseed 30min, with making 7.5% penoxsuam bensulfuron-methyl oil-suspending agent after the sand mill sand milling.
2. the application of herbicidal composition claimed in claim 1 in preventing and kill off rice seedling bed, direct seading rice field, rice transplanting paddy field and transplanting rice field grassy weed, broad leaved weed and sedge weed.
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CN101897339B (en) * 2010-08-20 2013-09-11 陕西上格之路生物科学有限公司 Herbicide composition containing cinosulfuron and penoxsulam
CN101911948B (en) * 2010-08-20 2013-07-31 陕西上格之路生物科学有限公司 Cinosulfuron-containing herbicide composition
CN102217627B (en) * 2011-05-06 2013-11-27 浙江泰达作物科技有限公司 Penoxsulam and ethoxysulfuron compound herbicide suspension and preparation method thereof
CN103371161B (en) * 2012-04-28 2016-08-03 陕西韦尔奇作物保护有限公司 A kind of Herbicidal combinations containing AC322140
CN103098812B (en) * 2013-01-27 2014-12-31 广东中迅农科股份有限公司 Penoxsulam and triflusulfuron-methyl weeding composition
CN103113154B (en) * 2013-02-02 2016-05-18 广东中迅农科股份有限公司 A kind of fertilizer granules of preventing and kill off paddy field weed and preparation method thereof
CN103202309B (en) * 2013-04-28 2015-01-28 江苏龙灯化学有限公司 Compound herbicide composition
CN103444707A (en) * 2013-08-01 2013-12-18 广东中迅农科股份有限公司 Environment-friendly type wettable powder capable of being directly applied to rice field
GB2534230B (en) * 2015-01-19 2019-06-12 Rotam Agrochem Int Co Ltd A herbicidal composition and method of controlling plant growth
CN104719316A (en) * 2015-03-09 2015-06-24 新疆天业(集团)有限公司 Compound and mixed herbicide special for paddy rice under drip irrigation with mulch
CN105340920A (en) * 2015-10-27 2016-02-24 北京燕化永乐生物科技股份有限公司 Herbicidal composition

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