CN105638684A - Weeding composition - Google Patents

Abstract

The invention relates to the technical field of pesticide compounding, in particular to a weeding composition, which is especially used for controlling annual weeds of paddy dry-raising fields. The weeding composition comprises the following effective ingredients of oxadiargyl and pyribenzoxim according to the weight ratio of 15:1 to 1: 15, preferably 5:1 to 1:3; the sum of weight percentages of oxadiargyl and pyribenzoxim in the pesticide composition is 0.1-85%. The weeding composition has the advantages that the synergistic interaction function is realized; compared with single use of single agents, the weeding effect is obviously improved, the weeding spectrum is broadened, the usage amount of pesticide is reduced, the pollution to environment is decreased, the production of drug resistance of weeds is prolonged, and the weeding composition is mainly applied to prevention and control of the annual weeds of the paddy dry-raising fields.

Description

A kind of Herbicidal combinations

Technical field

The present invention relates to technical field of pesticide combination, particularly relate to a kind of Herbicidal combinations, in particular for preventing and kill off arid rice nursery annual grassy weeds.

Background technology

Oxadiargyl (Oxadiargyl) belongs to diazole type herbicides, and the mechanism of action is the inhibitor of proporphyrinogen oxidase. Can effectively prevent and kill off rice terrace annual gramineous weed, broad-leaved, sedge weed and the water such as firefly Lin, barnyard grass, wild Corm Eleocharitis, cyperus iria, Herba Cyperi Difformis, Herba Eleocharitis acicularis, mexicana, little najas marina, Semen Euphorbiae, Herba Caricis Phacotae, Herba monochoriae vaginalis, Monochoria korsakowii, Rhizoma Alismatis, short Rhizoma sagittariae sagittifoliae, Rhizoma sagittariae sagittifoliae, Herba Bidentis Tripartitae, Herba potamogetonis distincti continuous.

Pyribenzoxim (Pyribenzoxim) is pyrimidinylthiobenzoate herbicides, Oryza sativa L., common wheat, Korea lawn grass are had activity of weeding after selectivity ultra high efficiency bud, without activity of weeding before bud, distinguished for preventing and kill off the various grassy weeds such as barnyard grass, big fringe amur foxtail, Herba polygoni hydropiperis and broad leaved weed effect, to Oryza sativa L., common wheat safety.

When Oxadiargyl is used alone on Oryza sativa L. the safety of Oryza sativa L. is poor, and use scope is only limitted to transplanted rice field, and application mode is relatively single and only has bottle at present and gets rid of method. Pyribenzoxim is Oryza sativa L. broad spectrum weeding agent, and current application mode is only limitted to stem and leaf spraying, and drug effect is relatively slow.

Summary of the invention

It is an object of the invention to provide a kind of have synergistic function, expand herbicide spectrum, use cost is low, prevention effect is good containing the Herbicidal composition for rice field that effective ingredient is Oxadiargyl and pyribenzoxim.

The technical scheme realizing the object of the invention is: Herbicidal combinations of the present invention is with Oxadiargyl and pyribenzoxim for effective ingredient, and the weight ratio of Oxadiargyl and pyribenzoxim is 15:1��1:15, and more ratio of greater inequality is 5:1��1:3. Oxadiargyl and pyribenzoxim weight summation percentage by weight in composition pesticide are 0.1%��85%, and all the other are allow in pesticide to use and acceptable auxiliary element.

Herbicidal combinations of the present invention can according to well known to a person skilled in the art method, it is possible to be processed in the applicable agricultural productions such as oil-suspending agent, granule, wettable powder, water dispersible granules, effervescent tablet, aqueous emulsion and film-spreading oil solution use application forms.

Described oil-suspending agent dosage form weight percent consists of: Oxadiargyl 1��40%, pyribenzoxim 1��40%, dispersant 5��15%, wetting agent 5��15%, thickening agent 0.1��2%, liquid-carrier complements to 100%. Concrete production stage is: by effective ingredient and the mixing of other auxiliary agent, after sand milling in high speed shear dispersion, sand mill, form high dispersive, stable suspension system, prepare oil-suspending agent in non-water-medium.

Described dosage form of water dispersible granule weight percent consists of: Oxadiargyl 1��60%, pyribenzoxim 1��60%, dispersant 5��15%, wetting agent 5��10%, disintegrating agent 1��10%, solid carrier complements to 100%. Concrete production stage is: by effective ingredient and other auxiliary agent mix homogeneously, pulverizes with micro jet, through mediating, is subsequently adding in fluidized-bed granulation dryer and carries out pelletize, dry, screening, prepare water dispersible granules.

Described wettable powder formulation weight percent consists of: Oxadiargyl 1��60%, pyribenzoxim 1��60%, dispersant 5��15%, wetting agent 5��15%, solid carrier complements to 100%. Concrete production stage is: by effective ingredient and the mixing of other auxiliary agent, then through comminution by gas stream after mechanical activation comminution, and mix homogeneously prepares wettable powder.

Described granule dosage form weight percent consists of: Oxadiargyl 0.1��10%, pyribenzoxim 0.1��10%, binding agent 10��30%, dispersant 5��15%, wetting agent 5��10%, solid carrier complements to 100%. Concrete production stage is: by effective ingredient and the blended kneading that adds water of other auxiliary agent, uses pinch-out granulator pinch out and shape, and afterwards by granule fluid bed drying, screening, prepares granule.

Described effervescent tablet dosage form weight percent consists of: Oxadiargyl 0.1��30%, pyribenzoxim 0.1��30%, dispersant 5��15%, wetting agent 5��10%, solid acid 10��30%, carbonate 10��30%, binding agent 1��10%, flowing regulator 1��10%, solid carrier complements to 100%. Effective ingredient, wetting agent, dispersant, solid acid, carbonate, flowing regulator and filler are sufficiently mixed uniformly, then it is crushed to 0.3��5 ��m with superfine comminution at low temperature machine, it is subsequently added into the binding agent of water furnishing pasty state, tablet machine film-making is used after stirring, last drying, granulate, detect, pack after, prepare effervescent tablet.

Described aqueous emulsion agent weight percent consists of: Oxadiargyl 1��40%, pyribenzoxim 1��40%, emulsifying agent 5��30%, solvent 5��15%, antifreezing agent 2��5%, defoamer 0.1��5%, thickening agent 0.1��2%, deionized water complements to 100%. First effective ingredient, solvent, emulsifying agent are mixed, dissolve and become uniform oil phase. Again part water and other auxiliary agents are mixed, dissolve and become uniform aqueous phase. Then aqueous phase is added oil phase while high-speed stirred in a kettle., slowly add water to and reach phase inversion point, carry out high speed shear afterwards, and add remaining water, shear about 30min, prepare aqueous emulsion.

Described film-spreading oil solution dosage form weight percent consists of: Oxadiargyl 1��40%, pyribenzoxim 1��40%, solvent 1��20%, film former 1��20%, dispersant 1��15%, liquid-carrier complements to 100%. After fully being dissolved by effective ingredient solvent, it is initially charged dispersant, is eventually adding film former, be sufficiently stirred for mix homogeneously to transparent, prepare film-spreading oil solution.

Described solvent can be one or more in methanol, ethanol, butanol, propylene glycol, glycerol, Polyethylene Glycol, Ketohexamethylene, ketopyrrolidine, machine oil, solvent naphtha, trimethylbenzene, dimethylbenzene, dimethylformamide, N-methyl ketopyrrolidine, fatty acid distribution of coconut oil methyl ester, methyl oleate, methylated vegetable oil, ethyl acetate, dimethyl phthalate, dibutyl phthalate etc.

Described emulsifying agent can be alkylphenol polyoxyethylene, alkylphenol-polyethenoxy polyethenoxy ether, Ben-zylphenol Polyoxyethyl Ether, polyoxyethylene fatty acid ester, polyoxyethylene aliphatic alcohol ether, polyoxyethylene fatty amine, alkyl phenol polyglycol ether, Span series (sorbitan monostearate), TWEEN Series (sorbitan fatty acid ester polyoxyethylene ether), AEO series (fat alcohol polyoxyethylenated alcohol), OP series phosphate ester (thermally coupled distillation columns), OP series (NPE), one or more in By series (castor oil polyoxyethylene ether) etc. described film former can be one or more in Lauryl Alcohol ester, methyl laurate, octadecanol, propylene glycol phenylate and monobutyl ether acetate etc.

Described defoamer can be one or more in silicone compound, epoxy soybean oil, methanol, silicone oil etc.

Described antifreezing agent can be one or more in glycerol, propylene glycol, diethylene glycol, carbamide etc.

Described wetting agent can be one or more in sodium lauryl sulphate, dodecylbenzene sodium sulfonate, sodium butylnaphthalenesulfonate, sodium alkyl sulfonate, tea seed cake powder, spaonin powder, Fructus Sapindi Mukouossi powder etc.

Described dispersant can be alkylphenol polyoxyethylene formaldehyde condensation products, naphthalenesulfonate formaldehyde condensation compound, to one or more in methoxyl group fatty acyl anilinesulfonic acid, lignosulfonates, polycarboxylate, alkylphenol polyoxyethylene sulfate, alkyl benzene sulfonate calcium salt, fatty acid ester sulfate, alkylphenol polyoxyethylene, fatty alcohol-polyoxyethylene ether etc.

Described disintegrating agent can be one or more in carboxymethyl starch sodium, low-substituted hydroxypropyl cellulose, cross-linking sodium carboxymethyl cellulose, polyvinylpolypyrrolidone, chitosan, sodium alginate sodium bicarbonate, magnesium chloride, aluminum chloride, sodium chloride, carbamide, ammonium sulfate, bentonite etc.

Described thickening agent can be one or more in polyvinyl acetate, xanthan gum, gelatin, Radix Acaciae senegalis, aluminium-magnesium silicate, phenolic resin, hydroxymethyl cellulose, sodium alginate etc.

Described solid carrier can be one or more in precipitated calcium carbonate, potter's clay, Kaolin, kieselguhr, bentonite, white carbon, clay, attapulgite, Pulvis Talci, quartz sand etc.

Described liquid-carrier can be one or more in refined soybean oil, Semen Maydis oil, Oleum Brassicae campestris, Oleum Terebinthinae, methyl oleate, Oleum Cocois, Petiolus Trachycarpi wet goods.

Described binding agent can be one or more in sucrose, polyvinyl alcohol, Polyethylene Glycol, sodium carboxymethyl cellulose, carboxymethylcellulose calcium, carboxy-propyl cellulose, dextrin, amylodextrin, polyvinylpyrrolidone, viscosity Kaolin, paraffin, Colophonium etc.

Described solid acid can be one or more in citric acid, succinic acid, maleic acid, fumaric acid, tartaric acid, oxalic acid, malonic acid, malic acid, succinic acid, adipic acid, boric acid, phosphoric acid, benzoic acid, sulfamic acid, salicylic acid, glutamic acid, phenylacetic acid, nicotinic acid or sorbic acid etc.Described carbonate can be one or more in sodium carbonate, potassium carbonate, ammonium carbonate, calcium carbonate, lithium carbonate, sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, sodium sesquicarbonate, bicarbonate tripotassium or bicarbonate three ammonium etc.

Described flowing regulator can be one or more in calcium stearate, magnesium stearate, barium stearate, titanium dioxide, Pulvis Talci, Stepanol MG, polysorbate, Semen Tritici aestivi starch or sodium benzoate etc.

The frequency of administration of the present composition and amount of application have small variations with crops, weeds, weather condition change, it is possible to by using suitable dosage to reach the purpose of effectively preventing and treating.

Compared with prior art, it is an advantage of the current invention that:

1, Oxadiargyl and pyribenzoxim composite have synergistic function, are used alone than single dose and significantly improve the prevention effect to paddy field weed, expand herbicide spectrum.

2, Oxadiargyl and two kinds of effective ingredient of pyribenzoxim are composite, decrease Pesticide use amount, reduce resistance risk, decrease use cost, Environmental compatibility good.

Detailed description of the invention

The detailed description of the invention of form by the following examples, is described in further detail the foregoing of the present invention, but this should not being interpreted as, the scope of the above-mentioned theme of the present invention is only limitted to Examples below. All technology realized based on foregoing of the present invention belong to the scope of the present invention. First pass through Toxicity Determination, be tentatively combined the screening of composition formula, according to the abundant method of Sun Yun, calculate the co-toxicity coefficient (CTC) of mixture, if CTC < 80, for antagonism; 80��CTC��120, for summation action; CTC > 120, for potentiation; CTC > 170, for notable potentiation. On this basis, after filtering out the composite formula that synergistic effect is best, carry out corresponding field control effectiveness test checking.

1, the Toxicity Determination test of the present composition

Indoor bioassay test includes a kind of suspending agent containing Oxadiargyl and pyribenzoxim virulence to barnyard grass, Herba monochoriae vaginalis and dried tuber.

Assays Example one: the Toxicity Determination of barnyard grass (Echinochloacrusgalli) is tested by a kind of suspending agent containing Oxadiargyl and pyribenzoxim.

Table 1 Oxadiargyl and pyribenzoxim and the built agent Toxicity Determination to barnyard grass thereof

As can be seen from Table 1: when Oxadiargyl and pyribenzoxim are composite in the scope of 15:1��1:15, co-toxicity coefficient CTC is all higher than 120, according to the abundant method of Sun Yun, illustrate composite after the indoor virulence of barnyard grass is shown as potentiation, when wherein ratio is 5:1,1:1 and 1:3, CTC both is greater than 170, illustrate when these ratios, barnyard grass is shown as significant potentiation by said composition, and when ratio is 1:1, synergistic effect is the most notable.

Assays Example two: Herba monochoriae vaginalis (Monochoriavaginalis) Toxicity Determination is tested by a kind of suspending agent containing Oxadiargyl and pyribenzoxim.

As can be seen from Table 2: when Oxadiargyl and pyribenzoxim are composite within the scope of 10:1��1:5, co-toxicity coefficient is all higher than 120, namely the indoor virulence of Herba monochoriae vaginalis is shown as potentiation; When ratio reaches 5:1,1:1 and 1:3, CTC is all higher than 170, shows as significant potentiation, and wherein the synergistic effect when the ratio of 5:1 is the most notable.

Table 2 Oxadiargyl and pyribenzoxim and the built agent Toxicity Determination to Herba monochoriae vaginalis thereof

Assays Example three: dried tuber (Cyperusdifformis) Toxicity Determination is tested by a kind of suspending agent containing Oxadiargyl and pyribenzoxim.

As can be seen from Table 3: when Oxadiargyl and pyribenzoxim are composite within the scope of 15:1��1:15, the indoor virulence of dried tuber is all shown as notable potentiation by said composition. Secondly wherein, when ratio is 5:1, CTC is maximum, and when being 1:1 ratio, and when two ratios, CTC is all higher than 170, illustrates dried tuber is shown as significant potentiation, and ratio to be synergistic effect when 5:1 the most notable.

Table 3 Oxadiargyl and pyribenzoxim and the built agent Toxicity Determination to dried tuber thereof

In sum, when Oxadiargyl and pyribenzoxim are when 5:1 and 1:1 ratio, to barnyard grass, Herba monochoriae vaginalis, dried tuber indoor virulence synergistic effect best, therefore the two ratio is selected to make mixture preparation under certain condition, carry out field efficacy checking test, to evaluate actual field control effect further.

(1) Formulation Example

In following examples, effective ingredient adopts the 96% former medicine of Oxadiargyl and the former medicine of 98% pyribenzoxim, and each component percentages is weight percentage.

Embodiment 1:65% Oxadiargyl pyribenzoxim water dispersible granules

Oxadiargyl 40%, pyribenzoxim 25%, sodium lauryl sulphate 5%, to methoxyl group fatty acyl anilinesulfonic acid 8%, ammonium sulfate 2%, Kaolin supplies 100%. By above-mentioned effective ingredient, dispersant, wetting agent, disintegrating agent and solid carrier mix homogeneously, pulverize with micro jet, through mediating, it is subsequently adding in fluidized-bed granulation dryer and carries out pelletize, dry, screening, can be prepared by 65% Oxadiargyl pyribenzoxim water dispersible granules.

Under this kind of compound mode, on Oryza sativa L., stem and leaf spraying is higher to Security of rice, analyze from plant fresh weight control rate, Herba monochoriae vaginalis is prevented and treated efficiency relative better than barnyard grass, dried tuber by this kind of compound mode, after medicine, 15 days Herba monochoriae vaginalis control rates are 91.2%, barnyard grass, dried tuber respectively 86.9% and 88.1%, after medicine, 30 days Herba monochoriae vaginaliss are prevented and treated efficiency and are reached 93.7%, and barnyard grass is 88.5%, dried tuber is 91.4%.

Embodiment 2:70% Oxadiargyl pyribenzoxim wettable powder

Oxadiargyl 40%, pyribenzoxim 30%, sodium butylnaphthalenesulfonate 6%, fatty acid ester sulfate 8%, kieselguhr supplies 100%. By above-mentioned, effective ingredient, dispersant, wetting agent and solid carrier are mixed, then through comminution by gas stream after mechanical activation comminution, mix homogeneously, can be prepared by 70% Oxadiargyl pyribenzoxim wettable powder.

This kind of compound mode stem and leaf on Oryza sativa L. is sprayed to rice safety, after medicine, continuous observation is best to the prevention effect of Herba monochoriae vaginalis, when the 15th day, Herba monochoriae vaginalis fresh weight control rate is 96.3%, barnyard grass fresh weight control rate is 92.4%, and dried tuber control rate is 89.4%, when the 30th day, Herba monochoriae vaginalis is all dead, control rate is 100%, and barnyard grass control rate is 98.4%, and dried tuber control rate is 94.3%.

Embodiment 3:20% Oxadiargyl pyribenzoxim oil-suspending agent

Oxadiargyl 12%, pyribenzoxim 8%, polycarboxylate 10%, dodecylbenzene sodium sulfonate 10%, sodium alginate 1.5%, methyl oleate supplies 100%. Above-mentioned effective ingredient and auxiliary agent are disperseed through high speed shear, in sand mill after sand milling, the high dispersive formed in non-water-medium, stable suspension system, can be prepared by 20% Oxadiargyl pyribenzoxim oil-suspending agent.

Stem and leaf spraying is to rice safety on Oryza sativa L. for this kind of compound mode, and the prevention effect of barnyard grass is relatively better, after medicine 15 days, and barnyard grass fresh weight control rate is 91.8%, is secondly Herba monochoriae vaginalis, dried tuber, and respectively 88.4%, 83.7%;After medicine 30 days, three kinds of weeds fresh weight control rates slightly rose, and respectively 93.0%, 90.7%, 85.9%.

Embodiment 4:1% Oxadiargyl pyribenzoxim granule

Oxadiargyl 0.7%, pyribenzoxim 0.3%, sodium butylnaphthalenesulfonate 10%, lignosulfonates 10%, polyvinyl alcohol 20%, clay complements to 100%. Blended to above-mentioned effective ingredient and auxiliary agent adding water is mediated, uses pinch-out granulator pinch out and shape, afterwards by granule fluid bed drying, screening, can be prepared by 1% Oxadiargyl pyribenzoxim granule.

This kind of compound mode stem and leaf on Oryza sativa L. is sprayed to rice safety, to barnyard grass, Herba monochoriae vaginalis, dried tuber to prevent and treat efficiency lower slightly, 15 days three kinds of control of weeds efficiency respectively 85.7%, 81.9%, 78.1% after medicine, after medicine, 30 days control of weeds efficiency is substantially without significant change, and respectively 86.6%, 83.7%, 79.5%.

Embodiment 5:35% Oxadiargyl pyribenzoxim effervescent tablet

Oxadiargyl 20%, pyribenzoxim 15%, sodium lauryl sulphate 5%, fatty alcohol-polyoxyethylene ether 5%, tartaric acid 15%, potassium bicarbonate 15%, dextrin 2%, magnesium stearate 5%, Kaolin complements to 100%. Above-mentioned effective ingredient and other auxiliary agent (except binding agent) are sufficiently mixed uniformly, then it is crushed to 0.3��5 ��m with superfine comminution at low temperature machine, it is subsequently added into the binding agent of water furnishing pasty state, tablet machine film-making is used after stirring, last drying, granulate, detect, pack after, can be prepared by 35% Oxadiargyl pyribenzoxim effervescent tablet.

This kind of compound mode stem and leaf on Oryza sativa L. is sprayed to rice safety, it is 90.2% that barnyard grass fresh weight is prevented and treated effect, slightly above Herba monochoriae vaginalis, dried tuber, it prevents and treats efficiency for respectively 86.6%, 83.5%, 30 days three kinds of weeds fresh weight control rates respectively 92.8%, 88.4%, 85.7% after medicine.

Embodiment 6:36% Oxadiargyl pyribenzoxim aqueous emulsion

Oxadiargyl 30%, pyribenzoxim 6%, castor oil polyoxyethylene ether 20%, Ketohexamethylene 10%, propylene glycol 2%, silicone oil 0.5%, xanthan gum 0.2%, deionized water complements to 100%. First effective ingredient, solvent, emulsifying agent are mixed, dissolve and become uniform oil phase. Again part water and other auxiliary agents are mixed, dissolve and become uniform aqueous phase. Then aqueous phase is added oil phase while high-speed stirred in a kettle., slowly add water to and reach phase inversion point, carry out high speed shear afterwards, and add remaining water, shear about 30min, can be prepared by 40% Oxadiargyl pyribenzoxim aqueous emulsion.

This kind of compound mode stem and leaf spraying on Oryza sativa L. is the highest to Security of rice, the investigation of plant fresh weight control rate to barnyard grass, Herba monochoriae vaginalis, that dried tuber prevents and treats efficiency is all relatively best, after medicine 15 days, barnyard grass, Herba monochoriae vaginalis, dried tuber fresh weight control rate respectively 95.2%, 96.4%, 91.6%, after medicine 30 days, three kinds of grass are most dead, control rate respectively 98.4%, 99.6%, 96.3%.

Embodiment 7:10% Oxadiargyl pyribenzoxim film-spreading oil solution

Oxadiargyl 5%, pyribenzoxim 5%, Ketohexamethylene 5%, Lauryl Alcohol ester 10%, alkylphenol polyoxyethylene 5%, NPE 10%, ethyl acetate complements to 100%. After fully being dissolved by effective ingredient solvent, it is initially charged dispersant, is eventually adding film former, be sufficiently stirred for mix homogeneously to transparent, can be prepared by 10% Oxadiargyl pyribenzoxim film-spreading oil solution.

This kind of compound mode stem and leaf spraying on Oryza sativa L. is higher to Security of rice, to barnyard grass, Herba monochoriae vaginalis, dried tuber prevent and treat efficiency all more than 92%, wherein barnyard grass prevented and treated efficiency up to 96.5%, Herba monochoriae vaginalis, dried tuber respectively 93.8%, 92.6%, after medicine 30 days, weeds are dead further, its three kinds of weeds fresh weight control rates respectively 97.9%, 95.3%, 94.4%.

Land for growing field crops drug effect confirmatory experiment

Therefore, compositions according to Oxadiargyl-pyribenzoxim is to barnyard grass, Herba monochoriae vaginalis, the indoor bioassay of dried tuber and the checking test of land for growing field crops drug effect, show that barnyard grass, Herba monochoriae vaginalis, dried tuber have different proportionings to barnyard grass, Herba monochoriae vaginalis, dried tuber potentiation under different dosage form, and Security of rice is high, it is the herbicide composition preventing and kill off rice terrace annual grassy weeds. Dosing of the present invention is the dosing for 0.07 hectare.

Claims (6)

1. a Herbicidal combinations, it is characterised in that: described Herbicidal combinations includes effective ingredient and auxiliary element, and wherein effective ingredient is Oxadiargyl and pyribenzoxim, and effective ingredient percetage by weight in Herbicidal combinations is 0.1%��85%.

2. a kind of Herbicidal combinations according to claim 1, it is characterised in that: the weight ratio of described Oxadiargyl and pyribenzoxim is 15:1��1:15.

3. a kind of Herbicidal combinations according to claim 1, it is characterised in that: the weight ratio of described Oxadiargyl and pyribenzoxim is 5:1��1:3.

4. a kind of Herbicidal combinations according to claim 1, it is characterised in that: the dosage form of described Herbicidal combinations is the one in oil-suspending agent, granule, wettable powder, water dispersible granules, effervescent tablet, aqueous emulsion or film-spreading oil solution.

5. a kind of Herbicidal combinations according to claim 1, it is characterised in that: the described auxiliary element in Herbicidal combinations is selected from one or more in emulsifying agent or solvent or dispersant or wetting agent or disintegrating agent or thickening agent or stabilizer or defoamer or filler.

6. a kind of Herbicidal combinations according to claim 1, it is characterised in that: this Herbicidal combinations is used for preventing and treating rice terrace annual grassy weeds.