CN105432630A - Compound herbicide composition for corn field - Google Patents
Compound herbicide composition for corn field Download PDFInfo
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- CN105432630A CN105432630A CN201510834500.XA CN201510834500A CN105432630A CN 105432630 A CN105432630 A CN 105432630A CN 201510834500 A CN201510834500 A CN 201510834500A CN 105432630 A CN105432630 A CN 105432630A
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- atrazine
- tolpyralate
- bentazone
- corn
- weeds
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Abstract
The invention relates to herbicide composition for the corn field. The composition comprises three active ingredients including Tolpyralate, atrazine and bentazone, and the active ingredients have good synergistic interaction function when compounded in the weight ratio being (0.75-12): (22.5-360): (20-320), the weeding effect of the composition obtained after mixing of the active ingredients is remarkably better than that of a single agent, the use dosage is reduced, and the adverse effect of herbicide to the ecological environment is reduced while the herbicide use cost of farmers is reduced. The herbicide composition has a remarkable weeding effect, is safe to corn, doesn't affect succession crops and meets the safety requirements of a pesticide preparation.
Description
[technical field]
The invention belongs to technical field of pesticide, be specifically related to a kind of herbicidal composition containing Tolpyralate, for Control Weeds in Maize Field.
[background technology]
Corn is one of main cereal crops of China, and corn field weed occurs very serious, and China's corn variety is of a great variety, and various places varieties of plant differs greatly, and weed killer herbicide receives the concern of people day by day to the safety of different corn variety.The weed killer herbicide used after current domestic corn field seedling mainly contains: nicosulfuron, rimsulfuron, mesotrione, dicamba, thifensulfuron methyl, Brominal etc., mixture preparation has nicosulfuron and atrazine, dicamba and atrazine, nicosulfuron and piperazine humulone etc., but these weed killer herbicides still can not prevent and kill off some malignant weeds completely effectively, as the rhizome of nutgrass flatsedge, dayflower, piemarker etc.Research shows, corn field herbicide nicosulfuron, rimsulfuron are lower to sweet corn, waxy corn safety, even also can produce comparatively serious poisoning to some general planting kinds.Therefore, from the viewpoint of weed control and to corn safety two, China's corn field herbicide after seedling system also imperfection, needs to find other weed killer herbicide and supplements.
Tolpyralate; chemical name: 1-(1-ethyl-4-(3-(2-methoxy ethoxy)-2-methyl-4-(methyl sulphonyl) benzoyl)-1H-pyrazoles-5-base oxygen) ethyl methyl carbonate, structural formula is:
Tolpyralate belongs to benzoylpyrazole class selective herbicide, is HPPD inhibitor, is the novel corn field herbicide after seedling being originated in industry discovery by Japanese stone, can effectively prevents and kill off most of broad-leaved and grassy weed, to corn safety.The herbicidal effect of Tolpyralate is higher than mesotrione, benzene azoles humulone or ring sulphur ketone, and weak point is the preventive effect of part broad leaved weed undesirable, invalid to sedge weed.
Atrazine (Atrazine), other titles: atrazine, grass purify, chemical name: the chloro-N of 6-
2-ethyl-N
4isopropyl-1,3,5-triazines-2,4-diamines, structural formula is:
Atrazine belongs to triazines selectivity inner-adsorption conduction-type herbicide, and based on Root Absorption, cauline leaf absorbs seldom, conducts to plant meristematic tissue and leaf portion after medicament is absorbed very soon, suppresses the photosynthesis of weeds, makes it withered.Atrazine is resolved into innocuous substance by corn ketolase in the resistance crop bodies such as corn, thus to crop safety, be applicable to the dry crops such as corn, Chinese sorghum, sugarcane, fruit tree, nursery, forest land and prevent and kill off multiple annual gramineae and broad leaved weed, also certain inhibitory action is had to some perennial weed, but it is undesirable to the preventive effect of sedge family and part grassy weed, and the atrazine lasting period is long, coming into operation for many years, defines the pollution to the natural medium such as soil, water body.
Bentazone (Bentazone), other titles: Bentazon, Lysimachia sikokiana pellet, bentazon etc., chemical name: 3-isopropyl-1H-benzo-2,1,3-thiadiazine-4 (3H)-one 2,2-dioxide, structural formula is:
Weed eradication Pinus benzothiadiazine ketone selectivity contact killing type herbicide after seedling, for cauline leaf process in seedling stage, work mainly through blade contact, through blade face, infiltration conducts in chloroplast, electron transmission in inhibited photosynthesis process, after dispenser, 2 hours carton dioxide assimilation processes start suppressed, all stop by 11 hours, and blade is wilted and turned yellow, finally cause death, part crop can metabolism bentazone, makes it the material that fast degradation is non-activity, to crop safety.Be mainly used in the crop fields such as soybean, corn, paddy rice, peanut, wheat and prevent and kill off broad-leaved and sedge weed, invalid to grassy weed.
Have and report that Tolpyralate and Common Herbicides glyphosate, careless ammonium phosphine and dicamba are that fabulous bucket mixes partner; Find that existing patent document is disclosed the Herbicidal combinations containing Tolpyralate or bentazone by retrieval; such as patent CN200980149775.2 contains the Herbicidal combinations of benzoyl-pyrazoles; disclose Tolpyralate can respectively with bentazone or atrazine; but compositely between two still have part weeds not prevent and kill off; Tolpyralate and bentazone is composite prevents and kill off most of weeds; but it is invalid to part broad leaved weed; Tolpyralate and atrazine can effectively prevent and kill off broad-leaved and grassy weed, but invalid to sedge weed.
Patent CN201310190806.7 ternary weeding composition for corn field, disclose a kind of herbicidal composition by halosulfuronmethyl, bentazone and atrazine, but the preventive effect of said composition to part grassy weed is poor.
In order to make up above each single dose and report the deficiency that complex preparation exists in actual application, the present inventor furthers investigate, unexpected discovery on the basis of the screening of a large amount of formula indoors and field control effectiveness test, Tolpyralate, atrazine and bentazone composite in certain ratio range, to corn field weed, there is excellent control efficiency, the preventive effect shown and activity level exceed the superposition of each component, there is unforeseeable synergistic function, solve that weed killer herbicide is alone to be composed in herbicide, the limitation that preventive effect and safety exist, reach and expand herbicide spectrum, improve preventive effect, improve the object of safety.
[summary of the invention]
The object of the invention is to the present situation according to current corn field herbicide, and corn field weed a situation arises, provide that a kind of broad weed-killing spectrum, herbicidal effect are good, use safety, be conducive to the herbicidal composition of the corn field weed comprehensive regulation.
Present invention employs following technical scheme: a kind of corn field herbicide composition, containing A, B and C tri-kinds of active components, wherein active components A is Tolpyralate, and active component B is atrazine, and active component C is bentazone.
Concrete, in described herbicidal composition, the weight ratio of active components A, B and C is: (0.75-12): (22.5-360): (20-320), be preferably: (0.75-6): (22.5-180): (20-160), more preferably: (1.5-4.5): (50-140): (46-129), further be preferably: (2-4): (65-125): (59-114), optimum weight ratio is: 3:95:84.
Present invention also offers the preparation containing above-mentioned composition, in described preparation, the weight percentage of active ingredient is 5-90%.
Described preparation is any one formulation agriculturally allowed, and is preferably wetting powder, water dispersible granules, aqueous suspension agent, dry suspending agent or dispersibles the various formulations of the applicable agricultural uses such as oil-suspending agent, being more preferably wetting powder.
In described preparation, also containing auxiliary agent, be specially one or more in dispersant, wetting agent, disintegrant, adhesive or carrier.
When being mixed with wetting powder, adjuvant usedly to comprise:
Dispersant be selected from lignosulfonates, polycarboxylate, alkylnaphthalene sulfonate, neopelex, alkyl polyoxyethylene ether sulfonate or alkylphenol-polyethenoxy base ether formaldehyde condensation products etc. one or more;
Wetting agent be selected from lauryl sodium sulfate, Teepol, fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether or sorbitan fatty acid ester APEO etc. one or more;
Carrier be selected from kaolin, diatomite, attapulgite, bentonite or white carbon etc. one or more.
When being mixed with water dispersible granules, adjuvant usedly to comprise:
Dispersant be selected from polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene or alkylphenol polyoxyethylene sulfonate etc. one or more;
Wetting agent be selected from naphthalene sulfonate, aliphatic alcohol sulfate, dodecyl benzene sulfonate, lauryl sodium sulfate, fatty alcohol-polyoxyethylene ether or alkylsulfonate etc. one or more;
Disintegrant be selected from ammonium sulfate, urea, corn starch and derivative thereof, low-substituted hydroxypropyl cellulose, polyvinylpyrrolidone or sodium alginate etc. one or more;
Adhesive be selected from hydroxyethylcellulose, soluble starch, polyethylene glycol, methylcellulose, dextrin, fructose or polyvinyl alcohol etc. one or more;
Carrier be selected from white carbon, kaolin, bentonite, diatomite, precipitated calcium carbonate, gypsum, attapulgite, urea or sucrose etc. one or more.
When being mixed with aqueous suspension agent, adjuvant usedly to comprise:
Dispersant be selected from polycarboxylate, lignosulfonates, alkylnaphthalene sulfonate, TERSPERSE2425, alkylphenol polyoxyethylene etc. one or more;
Wetting agent be selected from alkylsulfonate, TERSPERSE2500, alkylphenol-polyethenoxy base ether phosphate, phenethyl phenol polyethenoxy base ether phosphate, alkyl sulfate, naphthalene sulfonate etc. one or more;
Thickener be selected from xanthans, polyvinyl alcohol, carboxymethyl cellulose, Sodium Polyacrylate, bentonite, aluminium-magnesium silicate etc. one or more;
Antifreezing agent be selected from ethylene glycol, propane diols, glycerine, urea etc. one or more;
Preservative be selected from formaldehyde, sorbic acid, Sodium Benzoate etc. one or more;
Defoamer is selected from silicone based defoamer.
When being mixed with dry suspending agent, adjuvant usedly to comprise:
Dispersant be selected from sodium lignin sulfonate, calcium lignosulfonate, polycarboxylate, alkylphenol polyoxyethylene formaldehyde condensation products, fatty alcohol polyoxyethylene ether sulfate, alkylphenol polyoxyethylene succinate sulfonate etc. one or more;
Wetting agent be selected from lauryl sodium sulfate, neopelex, Negel, Negel formaldehyde condensation products and alkylphenol-polyethenoxy base ether etc. one or more;
Disintegrant be selected from urea, sodium chloride, sulphate, carbonate and sodium carboxymethylcellulose etc. one or more;
Adhesive be selected from gelatin, gum Arabic, polyvinyl alcohol, polyethylene glycol and starch etc. one or more;
Carrier be selected from white carbon, kaolin, bentonite, diatomite, precipitated calcium carbonate, gypsum, attapulgite, urea or sucrose etc. one or more.
When be mixed with dispersible oil-suspending agent time, adjuvant usedly to comprise:
Dispersant be selected from methyl naphthalene sulfonic acid salt formaldehyde condensation products, polycarboxylate, lignosulfonates, TERSPERSE2425, alkylnaphthalene sulfonate etc. one or more;
Wetting agent be selected from alkylphenol polyoxyethylene formaldehyde condensation products sulphate, alkylphenol polyoxyethylene phosphate, alkyl sulfate, alkylsulfonate, naphthalene sulfonate etc. one or more;
Emulsifier be selected from ethoxylated castor oil, Nongru-700 #, agriculture breast 2201, TERSPERSE4894, anhydrous sorbitol single-hard ester acid ester APEO etc. one or more;
Thickener be selected from bentonite, polyvinyl alcohol, xanthans, aluminium-magnesium silicate etc. one or more;
Defoamer can be silicone based defoamer;
Cosolvent be selected from methyl alcohol, ethanol, dimethyl sulfoxide (DMSO) etc. one or more;
Dispersion medium be selected from corn oil, soybean oil, rapeseed oil, methyl oleate etc. one or more.
Salt described in above-mentioned auxiliary agent such as lignosulfonates, polycarboxylate etc. are sodium salt or calcium salt.
Herbicidal composition provided by the invention is mainly used in corn field management of weeds, and compared with prior art, the present invention possesses following beneficial effect:
1, activity of weeding is high, and the present invention's three kinds of active components have the different mechanism of action, and can improve the herbicidal effect of Herbicidal combinations to greatest extent, synergistic effect is obvious.
2, broad weed-killing spectrum, the present invention's three kinds of active components are composite can expand control of weeds spectrum, and a drug just can all weeds in control of maize field, comprise grass family, broad-leaved and sedge weed.
3, safety, Herbicidal combinations of the present invention, to crop safety, can kill corn field main weeds under the prerequisite not injuring crop.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, the following specific embodiment of the present invention is described, but is only limitted to this absolutely not.The following stated is the good embodiment of the present invention; only for describing the present invention; can not limitation of the present invention be interpreted as, it should be noted that any amendment done within the spirit and principles in the present invention, equivalent replacement and improve, all should be included within protection scope of the present invention.
Example of formulations 1:45%Tolpyralate atrazine bentazone wetting powder
After being mixed by formula rate by above-mentioned raw materials, frequent regulation is for the method for wetting powder, i.e. forward slip value, air-flow crushing, rear mixing, obtains 45%Tolpyralate atrazine bentazone wetting powder.
Example of formulations 2:60%Tolpyralate atrazine bentazone wetting powder
After being mixed by formula rate by above-mentioned raw materials, frequent regulation is for the method for wetting powder, i.e. forward slip value, air-flow crushing, rear mixing, obtains 60%Tolpyralate atrazine bentazone wetting powder.
Example of formulations 3:26%Tolpyralate atrazine bentazone water dispersible granules
After being mixed by formula rate by above-mentioned raw materials, frequent regulation is for the method for water dispersible granules, i.e. forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains 26%Tolpyralate atrazine bentazone water dispersible granules.
Example of formulations 4:75%Tolpyralate atrazine bentazone water dispersible granules
After being mixed by formula rate by above-mentioned raw materials, frequent regulation is for the method for water dispersible granules, i.e. forward slip value, air-flow crushing, rear mixing, add water kneading, granulation, screening, obtains 75%Tolpyralate atrazine bentazone water dispersible granules.
Example of formulations 5:16%Tolpyralate atrazine bentazone aqueous suspension agent
After being mixed by formula rate by above-mentioned raw materials, frequent regulation, for the method for aqueous suspension agent and high speed shear dispersion 30min, is used sand mill sand milling, is obtained described 16%Tolpyralate atrazine bentazone aqueous suspension agent.
Example of formulations 6:39%Tolpyralate atrazine bentazone aqueous suspension agent
After being mixed by formula rate by above-mentioned raw materials, frequent regulation, for the method for aqueous suspension agent and high speed shear dispersion 30min, is used sand mill sand milling, is obtained described 39%Tolpyralate atrazine bentazone aqueous suspension agent.
Example of formulations 7:53%Tolpyralate atrazine bentazone dry suspending agent
After being mixed by formula rate by above-mentioned raw materials, through sand milling, spraying dry, obtain described 53%Tolpyralate atrazine bentazone dry suspending agent.
Example of formulations 8:31%Tolpyralate atrazine bentazone dry suspending agent
After being mixed by formula rate by above-mentioned raw materials, through sand milling, spraying dry, obtain described 31%Tolpyralate atrazine bentazone dry suspending agent.
Example of formulations 9:9%Tolpyralate atrazine bentazone dispersibles oil-suspending agent
After above-mentioned raw materials is mixed by formula rate, through grinding or high speed shear dispersion, obtain described 9%Tolpyralate atrazine bentazone and dispersible oil-suspending agent.
Example of formulations 10:22%Tolpyralate atrazine bentazone dispersibles oil-suspending agent
After above-mentioned raw materials is mixed by formula rate, through grinding or high speed shear dispersion, obtain described 22%Tolpyralate atrazine bentazone and dispersible oil-suspending agent.
Raw survey embodiment 1
The composite synergy mensuration of Tolpyralate, atrazine and bentazone and Herbicidal test
In order to prevent and kill off the corn field weed in agricultural production, inventors performed the mutually composite synergy of Tolpyralate, atrazine and bentazone to study, adopt indoor pot method to carry out cauline leaf process, test is with reference to " People's Republic of China (PRC) agricultural industry criteria NY/T1155.7-2006 farm-chemical indoor determination test rule-weed killer herbicide " the 7th part: the Colby method of instruction in the synergy mensuration of mixture.
1, reagent agent
The former medicine of 98%Tolpyralate
The former medicine of 98% atrazine
98% bentazone raw pesticide
2, for examination weeds
Green foxtail, Amaranthus retroflexus, the rhizome of nutgrass flatsedge
Cultivation for examination weeds adopts potted plant cultivation, by 11 × 12cm plastic basin, puts in shallow-water tank, by air-dry for the soil adopted back in the farmland not using weed killer herbicide, after sieving, fill basin, dry ground quantitatively to 4/5 place in basin, P in soil H value 7.0, the content of organic matter 1.2%.After making soil completely moistening by infiltrating irrigation mode bottom basin alms bowl, quantitatively broadcast sowing pretreated in soil surface for examination weed seed, according to seed size earthing 0.5cm-1.0cm, indoor temperature 28-32 DEG C/18-25 DEG C (d/n), relative moisture 75% ± 15%.Adopt infiltrating irrigation mode moisturizing bottom basin alms bowl in incubation, keep soil fully moistening.After weeds emerge, green foxtail is decided to be 10 strains, Amaranthus retroflexus and the rhizome of nutgrass flatsedge are decided to be 5 strains.
3, experimental scheme
41 process are established in test altogether, wherein Tolpyralate establishes 0.75, 1.5, 3, 6, 5 the dosage process of 12ga.i./mu, atrazine establishes 22.5, 45, 90, 180, 5 the dosage process of 360ga.i./mu, bentazone establishes 20, 40, 80, 160, 5 the dosage process of 320ga.i./mu, Tolpyralate+ atrazine+bentazone three is mixed sets up 0.75+22.5+20 separately, 0.75+45+40, 0.75+90+80, 0.75+180+160, 0.75+360+320, 1.5+22.5+40, 1.5+45+80, 1.5+90+160, 1.5+180+320, 1.5+360+20, 3+22.5+80, 3+45+160, 3+90+320, 3+180+20, 3+360+40, 6+22.5+160, 6+45+320, 6+90+20, 6+180+40, 6+360+80, 12+22.5+320, 12+45+20, 12+90+40, 12+180+80, 12+360+160ga.i. 25 the dosage ratio process of/mu, separately establish an auxiliary agent contrast, amount to 41 process, repeat 4 times.
4, test method
Be placed in spray tower when grass family and sedge weed 2-4 leaf phase, broad leaved weed 3-5 leaf and spray medicine (ASS-4 type pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPa, spouting liquid 30Kg/ mu), treat that natural air drying is placed in greenhouse to cultivate and observe.
5, weedy rices and analytical method
After dispenser, the growth conditions of routine observation weeds, poisoning symptom and poisoning degree, record symptom of chemical damage, within after medicine 21 days, weigh acrial part fresh weight, calculate weeds survival rate E, and adopt the evaluation of Colby method to use the type of action of medicament with, inquire into the reasonability of proportioning further.
Check plot, E=treatment region weeds fresh weight × 100/ weeds fresh weight ... (1)
Colby method computing formula:
The weeds survival rate of weed killer herbicide A when X---consumption is P;
The weeds survival rate of weed killer herbicide B when Y---consumption is Q;
The weeds survival rate of weed killer herbicide C when Z---consumption is W;
E
0---the theoretical weeds survival rate of weed killer herbicide (A+B+C) when consumption is (P+Q+W);
E
0-E > 10% is synergistic effect; E
0-E <-10% is antagonism; E
0-E value is summation action between ± 10%.
6, results and analysis is in Table 1-3
Table 1Tolpyralate, atrazine and bentazone mixture are to the actual measurement survival rate of green foxtail and theoretical survival rate
Tolpyralate, atrazine co-toxicity to green foxtail mixed with bentazone: Tolpyralate and atrazine all effective to green foxtail, the preventive effect of Tolpyralate to green foxtail is better, atrazine is slightly poor to the preventive effect of green foxtail, bentazone to green foxtail to no effect, along with the increase of Tolpyralate and atrazine consumption, after mixed, the preventive effect of green foxtail is improved.
Table 2Tolpyralate, atrazine and bentazone mixture are to the actual measurement survival rate of Amaranthus retroflexus and theoretical survival rate
Tolpyralate, atrazine co-toxicity to Amaranthus retroflexus mixed with bentazone: three kinds of active components are all effective to Amaranthus retroflexus, the preventive effect of atrazine to Amaranthus retroflexus is better, Tolpyralate is relative poor with the preventive effect of bentazone to Amaranthus retroflexus, along with the increase of atrazine consumption, after mixed, the preventive effect of Amaranthus retroflexus is improved.
Table 3Tolpyralate, atrazine and bentazone mixture are to the actual measurement survival rate of the rhizome of nutgrass flatsedge and theoretical survival rate
Tolpyralate, atrazine co-toxicity to the rhizome of nutgrass flatsedge mixed with bentazone: the preventive effect of bentazone to the rhizome of nutgrass flatsedge is better, Tolpyralate is relative poor with the preventive effect of atrazine to the rhizome of nutgrass flatsedge, along with the increase of bentazone consumption, after mixed, the preventive effect of the rhizome of nutgrass flatsedge is improved.
Toxicity Determination result shows, Tolpyralate, atrazine and bentazone are at weight ratio (0.75-12): (22.5-360): in the scope of (20-320), mixed showing as weeds is added or synergistic effect, at weight ratio (0.75-6): (22.5-180): mixed in the scope of (20-160) have obvious synergistic effect, expand control of weeds spectrum, reach the object of simultaneously preventing and kill off corn field main weeds.
Raw survey embodiment 2:
The composite safety testing to corn of Tolpyralate, atrazine and bentazone
In order to study the mutually composite safety of Tolpyralate, atrazine and bentazone, inventor has done following test, and test is with reference to " People's Republic of China (PRC) agricultural industry criteria NY/T1155.8-2007 farm-chemical indoor determination experiment criterion-weed killer herbicide " the 8th part: the safety testing cauline leaf spray-on process of crop.
1, reagent agent
The former medicine of 98%Tolpyralate
The former medicine of 98% atrazine
98% bentazone raw pesticide
2, for studying thing
Corn
Adopt greenhouse pot culture method for the cultivation studying thing, by 11 × 12cm plastic basin, put in shallow-water tank, by air-dry for the soil adopted back in the farmland not using weed killer herbicide, after sieving, fill basin, dry ground quantitatively to 4/5 place in basin, P in soil H value 7.0, the content of organic matter 1.2%.After making soil completely moistening from top-watered, corn seed is quantitatively broadcasted sowing in soil surface, according to seed size earthing 0.5cm-2.0cm, indoor temperature 28-32 DEG C/18-25 DEG C (d/n), relative moisture 75% ± 15%.Adopt infiltrating irrigation mode moisturizing bottom basin alms bowl in incubation, keep soil fully moistening.After emergence of corn, corn is decided to be 10 strains.
3, for examination weeds
Green foxtail, lady's-grass, kitchen garden, Amaranthus retroflexus, the rhizome of nutgrass flatsedge
Cultivation for examination weeds adopts greenhouse pot culture method, by 11 × 12cm plastic basin, puts in shallow-water tank, by air-dry for the soil adopted back in the farmland not using weed killer herbicide, after sieving, fill basin, dry ground quantitatively to 4/5 place in basin, P in soil H value 7.0, the content of organic matter 1.2%.After making soil completely moistening by infiltrating irrigation mode bottom basin alms bowl, quantitatively broadcast sowing pretreated in soil surface for examination weed seed, according to seed size earthing 0.5cm-1.0cm, indoor temperature 28-32 DEG C/18-25 DEG C (d/n), relative moisture 75% ± 15%.Adopt infiltrating irrigation mode moisturizing bottom basin alms bowl in incubation, keep soil fully moistening.After weeds emerge, green foxtail, lady's-grass are decided to be 10 strains, kitchen garden, Amaranthus retroflexus, the rhizome of nutgrass flatsedge are decided to be 5 strains.
4, experimental scheme
41 process are established in test altogether, wherein Tolpyralate establishes 1, 2, 4, 8, 5 the dosage process of 16ga.i./mu, atrazine establishes 30, 60, 120, 240, 5 the dosage process of 480ga.i./mu, bentazone establishes 30, 60, 120, 240, 5 the dosage process of 480ga.i./mu, Tolpyralate+ atrazine+bentazone three is mixed sets up 0.75+22.5+20 separately, 0.75+45+40, 0.75+90+80, 0.75+180+160, 0.75+360+320, 1.5+22.5+40, 1.5+45+80, 1.5+90+160, 1.5+180+320, 1.5+360+20, 3+22.5+80, 3+45+160, 3+90+320, 3+180+20, 3+360+40, 6+22.5+160, 6+45+320, 6+90+20, 6+180+40, 6+360+80, 12+22.5+320, 12+45+20, 12+90+40, 12+180+80, 12+360+160ga.i. 25 the dosage ratio process of/mu, separately establish an auxiliary agent contrast, amount to 41 process, repeat 4 times.
5, test method
Spray medicine (ASS-4 type pesticide spraying system in spray tower is placed in during the leaf phase until corn 3-5 leaf phase, grass family and sedge weed 2-4 leaf phase, broad leaved weed 3-5, DG8003 shower nozzle, atomisation pressure 2.75MPa, spouting liquid 30Kg/ mu), treat after dispenser that natural air drying is placed in greenhouse to cultivate and observe.
6, crop investigation
After dispenser, investigate each process corn with or without symptom of chemical damage, if having, record symptom of chemical damage, grade in detail, within after medicine 21 days, measure each process corn fresh weight, calculate fresh weight inhibition, with the safety of clear and definite test medicine to corn.
Table 4 poisoning evaluation index
| Poisoning classification | Poisoning degree (%) | Result describes |
| 0 | 0 | Safety, without poisoning |
| 1 | 1-10 | Without obvious poisoning |
| 2 | 11-30 | Slight poisoning |
| 3 | 31-50 | Moderate poisoning |
| 4 | ＞50 | Serious poisoning |
7, weedy rices
After dispenser, periodical visual inspection observes the growth conditions of weeds, poisoning symptom and poisoning degree, record symptom of chemical damage.The fresh weight preventive effect adopting growth inhibition assay to calculate each process in after medicine 21 days.
Growth inhibition assay computing formula:
In formula:
E-fresh weight preventive effect, unit is percentage (%);
T
0-contrast weeds acrial part fresh weight, unit is gram;
T
1-process weeds acrial part fresh weight, unit is gram.
8, results and analysis:
Table 5 respectively processes the preventive effect to weeds and the poisoning classification to corn
Can find out that Tolpyralate atrazine bentazone mixture is compared with single dose by table 5, at weight ratio (0.75-12): (22.5-360): in (20-320) scope, preventive effect to corn field main weeds and the safety to corn all higher than single dose, to corn safety.
In sum, Tolpyralate atrazine bentazone is composite within the specific limits significant synergistic effect, and to crop safety, complex preparation is not only corn field and provides a kind of safe, practical weed killer herbicide, and greatly reduces the cost of enterprise and peasant household.
Raw survey embodiment 5
Control Weeds in Maize Field field control effectiveness test I:
1, test process
14 process are established in test, repeat for 4 times, totally 56 process communities, and often process plot area 20 square metres, random district group arranges.(1)-(11) 45%Tolpyralate atrazine bentazone wetting powder is reagent agent, and (12)-(14) 60%Tolpyralate wetting powder, 48% atrazine wetting powder, 48% bentazone aqua are contrast medicament.Every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds has green foxtail, lady's-grass, kitchen garden, Amaranthus retroflexus, lamb's-quarters, the rhizome of nutgrass flatsedge etc.
2, pilot project and method
(1) safety: after dispenser, the situation of growing of investigation corn, evaluates reagent agent to the safety of corn.
(2) herbicidal effect: every community gets 4 points at random, investigates 1/4 square metre at often, and after dispenser, 30 days investigation weed control efficacies, record weeds kind and strain number respectively, calculate weeds strain preventive effect.
(3) result of the test
Safety: dispenser " Invest, Then Investigate ", chemicals treatment district corn plant height, Ye Se and blank district are basically identical, show that reagent agent (1)-(11) 45%Tolpyralate atrazine bentazone wetting powder is all to corn safety.
Herbicidal effect, in table 6:
Table 645%Tolpyralate atrazine bentazone wetting powder is to the preventive effect of corn field weed
Note: (1) 45%Tolpyralate atrazine bentazone wetting powder (0.75:180:20)
(2) 45%Tolpyralate atrazine bentazone wetting powder (1:160:33)
(3) 45%Tolpyralate atrazine bentazone wetting powder (1.5:140:46)
(4) 45%Tolpyralate atrazine bentazone wetting powder (2:125:59)
(5) 45%Tolpyralate atrazine bentazone wetting powder (2.5:110:72)
(6) 45%Tolpyralate atrazine bentazone wetting powder (3:95:84)
(7) 45%Tolpyralate atrazine bentazone wetting powder (3.5:80:99)
(8) 45%Tolpyralate atrazine bentazone wetting powder (4:65:114)
(9) 45%Tolpyralate atrazine bentazone wetting powder (4.5:50:129)
(10) 45%Tolpyralate atrazine bentazone wetting powder (5:35:144)
(11) 45%Tolpyralate atrazine bentazone wetting powder (6:22.5:160)
(12) 60%Tolpyralate wetting powder
(13) 48% atrazine wetting powders
(14) 48% bentazone aquas
(15) blank
As shown in Table 6, the 45%Tolpyralate atrazine bentazone wetting powder of different ratio between 85.67% ~ 96.91%, is all better than contrast medicament 60%Tolpyralate wetting powder, 48% atrazine wetting powder, 48% bentazone aqua (weeds strain preventive effect is respectively 61.58%, 65.46% and 46.66%) to common weed strain preventive effect.Wherein Tolpyralate, atrazine and bentazone weight ratio are (0.75-6): (22.5-180): have obvious preventive effect to corn field common weed time (20-160), and weeds strain preventive effect is all more than 85%; Tolpyralate, atrazine and bentazone weight ratio are (1.5-4.5): (50-140): better to corn field common weed preventive effect time (46-129), weeds strain preventive effect is all more than 90%; And Tolpyralate, atrazine and bentazone weight ratio when being 3:95:84 preventive effect especially up to 96.91%.Illustrate thus, Tolpyralate, atrazine and bentazone are at weight ratio (0.75-6): (22.5-180): in (20-160) scope, the weeds common to corn field have preventive effect, and this herbicidal composition is to corn safety.
Control Weeds in Maize Field field control effectiveness test II:
1, test process
(1) 10%Tolpyralate atrazine bentazone wetting powder (3:95:84) 900g/ mu
(2) 45%Tolpyralate atrazine bentazone wetting powder (3:95:84) 200g/ mu
(3) 90%Tolpyralate atrazine bentazone wetting powder (3:95:84) 100g/ mu
3 process are established in test, repeat for 4 times, totally 12 process communities, and often process plot area 20 square metres, random district group arranges.(1)-(3) Tolpyralate atrazine bentazone wetting powder is reagent agent, and every mu is watered 30 kilograms, adopts 552 third type sprayers (0.7mm aperture) even spraying.Field main weeds green foxtail, lady's-grass, kitchen garden, Amaranthus retroflexus, lamb's-quarters, the rhizome of nutgrass flatsedge etc.
2, pilot project and method
Herbicidal effect: every community gets 4 points at random, investigates 1/4 square metre at often, and after dispenser, 30 days investigation weed control efficacies, record weeds kind and strain number respectively, calculate weeds strain preventive effect.
3, result of the test: herbicidal effect is in table 7
After table 7 medicine, 30 days Tolpyralate atrazine bentazones are to the preventive effect of various weeds
Note: (1) 10%Tolpyralate atrazine bentazone wetting powder (3:95:84)
(2) 45%Tolpyralate atrazine bentazone wetting powder (3:95:84)
(3) 90%Tolpyralate atrazine bentazone wetting powder (3:95:84)
As shown in Table 7, when the weight ratio of Tolpyralate, atrazine and bentazone is 3:95:84, the Tolpyralate atrazine bentazone wetting powder of different content to common weed strain preventive effect all more than 96%, when showing that Tolpyralate, atrazine and bentazone weight ratio are optimal proportion, the herbicidal composition of different activities component content all has significant preventive effect to weeds.
In sum, instant component is reasonable, and preventive effect is better than activity when each component is used separately, all there is good preventive effect to grass family, broad-leaved and sedge weed, expand control of weeds spectrum, delayed the generation of herbicide resistance, to crop safety, meet the security requirement of pesticidal preparations.
Claims (9)
1. a herbicidal composition, it is characterized in that, said composition is made up of A, B and C tri-kinds of active components, wherein active components A is Tolpyralate, active component B is atrazine, active component C is bentazone, and the weight ratio of described active components A, B and C is: (0.75-12): (22.5-360): (20-320).
2. herbicidal composition according to claim 1, is characterized in that, the weight ratio of active components A, B and C is: (0.75-6): (22.5-180): (20-160).
3. herbicidal composition according to claim 2, is characterized in that, the weight ratio of active components A, B and C is: (1.5-4.5): (50-140): (46-129).
4. herbicidal composition according to claim 3, is characterized in that, the weight ratio of active components A, B and C is: (2-4): (65-125): (59-114).
5. herbicidal composition according to claim 4, is characterized in that, the weight ratio of active components A, B and C is: 3:95:84.
6. the herbicidal composition according to any one of claim 1-5, is characterized in that, the weight percentage of active component in herbicidal composition is 5-90%.
7. herbicidal composition according to claim 1, is characterized in that, described composition can be mixed with any one formulation agriculturally allowed.
8. herbicidal composition according to claim 7, is characterized in that, described combination dosage form is wetting powder, water dispersible granules, aqueous suspension agent, dry suspending agent or dispersibles oil-suspending agent.
9. herbicidal composition according to claim 1, the application in Control Weeds in Maize Field.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245029A (en) * | 2008-12-11 | 2011-11-16 | 石原产业株式会社 | Herbicidal compositions containing benzoylpyrazole compounds |
| CN102265867A (en) * | 2010-06-03 | 2011-12-07 | 南京华洲药业有限公司 | Mixed herbicide containing bentazone, mesotrione and atrazine and application thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245029A (en) * | 2008-12-11 | 2011-11-16 | 石原产业株式会社 | Herbicidal compositions containing benzoylpyrazole compounds |
| CN102265867A (en) * | 2010-06-03 | 2011-12-07 | 南京华洲药业有限公司 | Mixed herbicide containing bentazone, mesotrione and atrazine and application thereof |
Non-Patent Citations (1)
| Title |
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| 冯巨忠等: "灭草松玉米田除草试验", 《农药》 * |
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