CN103609581A - Herbicide composition containing pyrazosulfuron-ethyl, pyribenzoxim and S-metolachlor - Google Patents
Herbicide composition containing pyrazosulfuron-ethyl, pyribenzoxim and S-metolachlor Download PDFInfo
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- CN103609581A CN103609581A CN201310563977.XA CN201310563977A CN103609581A CN 103609581 A CN103609581 A CN 103609581A CN 201310563977 A CN201310563977 A CN 201310563977A CN 103609581 A CN103609581 A CN 103609581A
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- CN
- China
- Prior art keywords
- metolachlor
- pyribenzoxim
- pyrazosulfuron
- herbicide
- weeds
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- WVQBLGZPHOPPFO-LBPRGKRZSA-N (S)-metolachlor Chemical compound CCC1=CC=CC(C)=C1N([C@@H](C)COC)C(=O)CCl WVQBLGZPHOPPFO-LBPRGKRZSA-N 0.000 title claims abstract description 69
- 239000005617 S-Metolachlor Substances 0.000 title claims abstract description 69
- OVXMBIVWNJDDSM-UHFFFAOYSA-N (benzhydrylideneamino) 2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoate Chemical compound COC1=CC(OC)=NC(OC=2C(=C(OC=3N=C(OC)C=C(OC)N=3)C=CC=2)C(=O)ON=C(C=2C=CC=CC=2)C=2C=CC=CC=2)=N1 OVXMBIVWNJDDSM-UHFFFAOYSA-N 0.000 title claims abstract description 66
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- BGNQYGRXEXDAIQ-UHFFFAOYSA-N Pyrazosulfuron-ethyl Chemical group C1=NN(C)C(S(=O)(=O)NC(=O)NC=2N=C(OC)C=C(OC)N=2)=C1C(=O)OCC BGNQYGRXEXDAIQ-UHFFFAOYSA-N 0.000 title abstract 3
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Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention belongs to the technical field of insecticides and provides a compounded herbicide for paddy fields. The compounded herbicide contains three active ingredients, namely pyrazosulfuron-ethyl, pyribenzoxim and S-metolachlor, wherein the weight ratio of the three active ingredients is (0.3-1.5): (0.6-3): (20-100), and the mass percentage of the three active ingredients is 1-50% of the compounded herbicide. According to the herbicide composition disclosed by the invention, pyrazosulfuron-ethyl, pyribenzoxim and S-metolachlor are compounded, are used for preventing and eliminating the weeds of the grass family, sedge family and broad-leaved class and cooperate with one another to synergize, so that the weeding activity is increased, the herbicide controlling spectrum is enlarged, and the generation of the drug resistance of the weeds is delayed; the herbicide composition is safe to paddy and after-reap crops and is an ideal herbicide.
Description
[technical field]
The invention belongs to pesticide herbicide field, relate to a kind of ternary built herbicidal composition and application thereof being formed by pyrazosulfuron, pyribenzoxim, S-metolachlor.
[background technology]
China is large agricultural country, and paddy rice is one of crops of China's cultivated area maximum, and in order to guarantee high yield, the stable yields of paddy rice, country has carried out the input of each side, and especially science and technology applies.But, weeds in paddy field is a key factor that affects output always, according to statistics, rice field crop smothering area of (2～5 grades) more than medium in the whole nation reaches 1546.7 ten thousand hectares, account for the more than 40% of total cultivated area, wherein serious harm (4～5 grades) area reaches 3,800,000 hectares, accounts for the more than 11.5% of Monitoring of Paddy Rice Plant Area.Maximum with barnyard grass generation hazard area in these weeds, in addition also have the hazard areas such as difformed galingale herb, Monochoria vaginalis, moleplant seed, pondweed, Monochoria korsakowii and the order of severity to take second place, water silk floss, duckweed, firefly Lin, carp intestines, Herba Cyperi Glomerati, water three-coloured amaranth, water pepper etc. in addition that various places are common.Paddy field weeding is a great problem on producing, and chemical method weeding is the Main Means of controlling weeds.Herbicide for paddy field in the market mostly exists herbicide and composes narrow defect, use separately a kind of weed killer herbicide can not control completely effectively the generation of paddy field weed, and weed killer herbicide consumption is excessive or dispenser is uneven is easy to cause the residual hazard to this season crop or succession crop, therefore need the agent for removing grass in paddy field pharmaceutical preparations of efficient, low toxicity, economy, safety badly.
Pyrazosulfuron belongs to sulfonylurea selectivity inner-adsorption conduction-type herbicide, is inhibitor of acetolactate synthetase, suppresses the synthetic of side chain amino acid, makes the growth that stops growing very soon of the roots of weeds and bud, and whole strain is withered subsequently.Better to broad leaved weed, sedge weed control efficiency, can prevent and treat rice direct seeding field, transplant field, seedling throwing field weeds as Monochoria vaginalis, mexicana, Procumbent Falsepimpernel, fescue, difformed galingale herb, angustifolia arrowhead herb, pondweed, blue or green duckweed, carp intestines etc.But the part grassy weeds such as barnyard grass are only had to inhibitory action, preventive effect is poor, and use continuously easily paddy rice and succession crop are produced to poisoning for a long time, to pyrazosulfuron, there is resistance in various degree in the rice field main weeds such as difformed galingale herb, firefly Lin, arrowhead, Monochoria korsakowii.
Pyribenzoxim is pyrimidine salicylic acid inner-adsorption conduction-type herbicide, is acetolactate synthestase (ALS) inhibitor.Paddy rice, common wheat, Korea lawn grass etc. are had to activity of weeding after selectivity super-high-efficient bud, and without activity of weeding before bud, for preventing and kill off multiple grassy weed and the broad leaved weeds such as barnyard grass, large fringe amur foxtail, polygonum flaccidum, herbicidal effect is remarkable.But bad to the perennial sedge weed preventive effect of part, use continuously for many years rear section perennial weed to cause harm seriously as flat stalk Fischer grass, needle spikesedge herb, Japanese Fischer grass etc.
S-metolachlor is a kind of chloroamides class weed killer herbicide, mainly by the synthetic growth that suppresses cell of impede protein matter.Be mainly used in the weed control of the dry crops such as corn, peanut, soybean, sugarcane.Discovered in recent years, S-metolachlor can effectively be prevented and kill off the annual gramineous weed of paddy field and part sedge weed as barnyard grass, difformed galingale herb, needle spikesedge herb etc., but poor to the control efficiency of broad leaved weed.
By pertinent literature, retrieve existing and pyrazosulfuron, pyribenzoxim, relevant patent and the report of S-metolachlor.The patent that is CN103271061A such as publication number discloses pyrazosulfuron and the composite herbicidal composition of pyribenzoxim, although two combination of components have expanded herbicide spectrum to a certain extent, but the sedge weed that part has produced resistance to pyrazosulfuron is difficult for preventing and kill off as difformed galingale herb, Procumbent Falsepimpernel, arrowhead etc., and not high enough to the safety of crop, need to add safener to improve safety; CN1286912A discloses S-metolachlor and the composite herbicidal composition of pyrazosulfuron, and this two active components combination still has part grassy weed can not prevent and kill off as rice Li Shi standing grain, polygonum flaccidum, moleplant seed etc., and two components are mixed pyrazosulfuron and easily decomposed; CN103271068A discloses the composite herbicidal composition of pyribenzoxim, azoles humulone and pyrazosulfuron, and this three combination of components is dangerous to crop, need to add equally safener to reach the object to rice safety.In sum, above-mentioned disclosed complex composition is the defect of various degrees all, in order to make up above each weeding single dose and complex preparation deficiency in use, the present invention is by the use that is mixed of pyrazosulfuron, pyribenzoxim and S-metolachlor, be surprised to find that the new compositions that obtains obtained unexpected effect on control paddy field weed, a dispenser can be prevented and kill off various grass family, sedge family and the broad leaved weed in paddy field, reduce cost accounting, greatly improved the safety to paddy rice.And had not yet to see related documents and recorded the composite composition of pyrazosulfuron, pyribenzoxim and S-metolachlor.
[summary of the invention]
Technical problem to be solved by this invention is to provide that a kind of herbicidal effect is good, broad weed-killing spectrum, the herbicide composition for paddy fields that safe, cost accounting is low.
The present invention has adopted following technical scheme: a kind of herbicidal composition, the compound that comprises effective dose (A), compound (B) and three kinds of active components of compound (C).Wherein, compound (A) is pyrazosulfuron (Pyrazosulfuron-methyl); other titles: go out star, careless prestige, Tadalafil, Mercury, Han Lexing, one gram of careless jinx, grass is clean; chemical name: 5-(4; 6-dimethoxypyridin-2-base amino carbonyl amino sulfonyl)-1-methylpyrazole-4-carboxylic acid, ethyl ester, its structural formula is:
Compound (B) is pyribenzoxim (Pyribenzoxim), chemical name: O-[2, two [(4, the 6-dimethoxy-2-pyrimidine radicals) oxygen base] benzoyls of 6-] diphenyl-ketoxime, its structural formula is:
Compound (C) is S-metolachlor (S-metolachlor), other titles: Jin Douer, and chemical name: the chloro-6 '-ethyl-N-of (α RS, 1S)-2-(2-methoxyl group-1-Methylethyl) acetyl ortho-aminotoluene, its structural formula is:
Described weed killer herbicide active ingredient weight ratio is (A) pyrazosulfuron: (B) pyribenzoxim: (C) S-metolachlor=(0.3～1.5): (0.6～3): (20～100), preferred weight ratio is (A) pyrazosulfuron: (B) pyribenzoxim: (C) S-metolachlor=(0.3～1.5): (0.6～1.2): (20～40), the weight percentage in herbicidal composition is 1～50%.
Herbicidal composition of the present invention except the pyrazosulfuron that comprises active ingredient, pyribenzoxim, S-metolachlor, also contains carrier, solvent, emulsifier, dispersant, wetting agent, thickener, defoamer, antifreezing agent etc. and other is of value to the known substance that active ingredient is stablized in preparation and drug effect is brought into play.According to different uses, need or applying environment, herbicidal composition of the present invention can be prepared into by the pesticide producing mode of current routine any formulation allowing in multi-form agricultural, preferred dosage form is oil-suspending agent, wetting powder, water dispersible granules etc., is more preferably oil-suspending agent.
When being mixed with oil suspending agent, its active constituent content is 1～40%, adjuvant used comprising:
Wetting agent can be selected from alkylphenol polyoxyethylene formaldehyde condensation products sulphate, alkylphenol polyoxyethylene phosphate, alkyl sulfate, naphthalene sulfonate etc., and consumption is 0.2～8% of preparation total amount;
Dispersant can be selected from methyl naphthalene sulfonic acid salt formaldehyde condensation products, polycarboxylate, lignosulfonates, TERSPERSE2425, alkylnaphthalene sulfonate etc., and consumption is 0.1～10% of preparation total amount;
Emulsifier can be selected from ethoxylated castor oil, Nongru-700 #, TERSPERSE2500, sorbitan fatty acid ester APEO etc., and consumption is 0～5% of preparation total amount;
Thickener can be selected from bentonite, polyvinyl alcohol, xanthans, aluminium-magnesium silicate etc., and consumption is 0.2～5% of preparation total amount;
Defoamer can be silicone based, and consumption is 0.2～4% of preparation total amount;
Cosolvent is selected from methyl alcohol, ethanol, dimethyl sulfoxide (DMSO) etc., and consumption is 1～6% of preparation total amount;
Surplus is carrier, can be selected from corn oil, soybean oil, rapeseed oil, methyl oleate etc.
When being mixed with wetting powder, active constituent content is 10～50%, adjuvant used comprising:
Wetting agent can be selected from lauryl sodium sulfate, calcium dodecyl benzene sulfonate, naphthalene sulfonate, alkyl phenol formaldehyde resin polyoxyethylene ether, aliphatic alcohol sulfate etc., and consumption is 1～10% of preparation total amount;
Dispersant can be selected from polycarboxylate, lignosulfonates, alkylphenol polyoxyethylene phosphate, carboxymethyl cellulose, polyvinyl alcohol, alkylnaphthalene sulfonate etc., and consumption is 1～20% of preparation total amount;
All the other are filler, can be selected from ammonium sulfate, urea, white carbon, sucrose, diatomite, kaolin etc.
When being mixed with water dispersible granules, its active constituent content is 5～40%, and auxiliary agent comprises:
Wetting agent is selected from alkyl sulfate, alkylsulfonate, naphthalene sulfonate, sodium lignin sulfonate, sorbitan fatty acid ester polyoxyethylene ether, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene etc., and consumption is 1～20% of preparation total amount;
Dispersant is selected from polycarboxylate, NNO, TERSPERSE2700, lignosulfonates, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene, EO/PO block polyether etc., and consumption is 1～15% of preparation total amount;
Spreader-sticker can be selected from polyvinyl alcohol, alkyl diphenyl ether disulphonic acid sodium etc., consumption be preparation total amount be 1～15%;
Bleeding agent can be selected from sorbitan fatty acid ester APEO, aliphatic alcohol polyethenoxy base ether etc., and consumption is 1～10% of preparation total amount;
All the other are carrier, are selected from diatomite, kaolin, white carbon, attapulgite, potter's clay, urea etc.
Herbicidal composition of the present invention is mainly used in paddy field controlling weeds, compared with prior art has following beneficial effect:
1, the present composition adopts the use that is mixed of pyrazosulfuron, pyribenzoxim, S-metolachlor, herbicide spectrum difference and the Synergistic of this three component, greatly improve the removing activity of weed killer herbicide, made the herbicide spectrum of mixture preparation wider, the lasting period is longer.
2, the present composition adopts uses that be mixed of pyrazosulfuron, pyribenzoxim, S-metolachlor, utilizes three kinds of active component herbicide effects mechanism different, adopts the different mechanism of action to kill weeds, makes the Speed Reduction of herbicide resistance generation.
3, the present composition, for paddy field management of weeds, all has reliable safety to paddy rice and succession crop.
4, a dispenser can prevent and treat the paddy rice crop smothering in whole vegetative period, saves time, saving of labor, laborsaving, greatly reduces cost accounting.
[embodiment]
Product of the present invention and application are described by following specific embodiment, but should not be construed as limitation of the present invention.Without departing from the spirit and substance of the case in the present invention, the modification of the inventive method, step or condition etc. being made or replacement all belong to scope of the present invention.
FORMULATION EXAMPLE 1:7% pyrazosulfuron pyribenzoxim S-metolachlor oil suspending agent
Active component, wetting agent, dispersant, each component of soybean wet goods are mixed according to the ratio of formula, after grinding or high speed shear dispersion, obtain described 7% pyrazosulfuron pyribenzoxim S-metolachlor oil suspending agent.
FORMULATION EXAMPLE 2:10.5% pyrazosulfuron pyribenzoxim S-metolachlor oil suspending agent
After above-mentioned raw materials is mixed in proportion, through high speed shear, disperse 30min, with obtaining described 15% pyrazosulfuron pyribenzoxim S-metolachlor oil suspending agent after sand mill sand milling.
FORMULATION EXAMPLE 3:30% pyrazosulfuron pyribenzoxim S-metolachlor wetting powder
First use white carbon after S-metolachlor absorption evenly, then above-mentioned raw materials is prepared routinely to the i.e. front mixing of method, air-flow crushing, the rear mixing of wetting powder, obtain described 30% pyrazosulfuron pyribenzoxim S-metolachlor wetting powder.
FORMULATION EXAMPLE 4:44% pyrazosulfuron pyribenzoxim S-metolachlor wetting powder
After first S-metolachlor being adsorbed evenly with white carbon, then mix and after ultra-fine pulverizer disintegrating, obtain described 44% pyrazosulfuron pyribenzoxim S-metolachlor wetting powder in the ratio of formula with other component.
FORMULATION EXAMPLE 5:24% pyrazosulfuron pyribenzoxim S-metolachlor water dispersible granules
First S-metolachlor is adsorbed with white carbon, the method that mixes in the ratio of formula with above-mentioned raw materials after evenly again and prepare routinely water dispersible granules mixes, ultra micro air-flow crushing, mixing, granulation, obtains described 24% pyrazosulfuron pyribenzoxim S-metolachlor water dispersible granules.
FORMULATION EXAMPLE 6:21% pyrazosulfuron pyribenzoxim S-metolachlor water dispersible granules
First with white carbon S-metolachlor absorption evenly, mix by formula rate with above-mentioned raw materials again, through ultra micro air-flow crushing, become wetting powder, then add a certain amount of water mixing extruder grain, after drying screening, obtain 21% pyrazosulfuron pyribenzoxim S-metolachlor water dispersible granules.
The raw embodiment 1 that surveys:
The composite synergy mensuration of pyrazosulfuron, pyribenzoxim and S-metolachlor and Herbicidal test
In order to prevent and kill off the paddy field weed in agricultural production, inventor has carried out pyrazosulfuron, pyribenzoxim, the mutual composite synergy research of S-metolachlor, indoor pot method is carried out cauline leaf processing, test is tested criterion-weed killer herbicide with reference to the agricultural industry criteria NY/T1155.7-2006 of People's Republic of China (PRC) farm-chemical indoor determination, the 7th part: the Colby method that the synergy of mixture is instructed in measuring.
1, reagent agent
The former medicine of 98% pyrazosulfuron
The former medicine of 95% pyribenzoxim
The former medicine of 96% S-metolachlor
2, for examination weeds
Barnyard grass, moleplant seed, carp intestines, Monochoria vaginalis, difformed galingale herb
Cultivation for examination weeds adopts potted plant cultivation, by 11 * 12cm plastic basin, puts in shallow-water tank, and by using, the soil of adopting back in the farmland of weed killer herbicide was not air-dry, after sieving, filled basin, quantitative 4/5 place of dry ground in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, after making soil completely moistening, by pretreated, for examination weed seed, quantitatively broadcast sowing in soil surface, according to seed size earthing 0.5cm～2.0cm, 28～32 ℃/18～25 ℃ of indoor temperatures (d/n), relative moisture 75% ± 15%.With the moisturizing of basin alms bowl bottom infiltrating irrigation mode, keep soil fully moistening.After weeds emerge by barnyard grass, moleplant seed, be decided to be 10 strains, carp intestines, Monochoria vaginalis, difformed galingale herb are decided to be 5 strains.
3, experimental scheme
41 processing are established in this test altogether, wherein pyrazosulfuron establishes 0.3, 0.6, 0.9, 1.2, 5 dosage of 1.5g/ mu are processed, pyribenzoxim establishes 0.6, 1.2, 1.8, 2.4, 5 dosage of 3g/ mu are processed, S-metolachlor establishes 20, 40, 60, 80, 5 dosage of 100g/ mu are processed, the mixed 0.3+0.6+20 that sets up separately of pyrazosulfuron+pyribenzoxim+S-metolachlor three, 0.3+1.2+40, 0.3+1.8+60, 0.3+2.4+80, 0.3+3+100, 0.6+0.6+40, 0.6+1.2+60, 0.6+1.8+80, 0.6+2.4+100, 0.6+3+20, 0.9+0.6+60, 0.9+1.2+80, 0.9+1.8+100, 0.9+2.4+20, 0.9+3+40, 1.2+0.6+80, 1.2+1.2+100, 1.2+1.8+20, 1.2+2.4+40, 1.2+3+60, 1.5+0.6+100, 1.5+1.2+20, 1.5+1.8+40, 1.5+2.4+60, 1.5+3+80g/ 25 dosage ratios of mu are processed, separately establish an auxiliary agent contrast, amount to 41 processing, repeat 4 times.
4, test method
When grass family and 2～4 leaf phases of sedge weed, broad leaved weed 3～5 leaf, be placed in and in spray tower, spray medicine (ASS-4 type pesticide spraying system, DG8003 shower nozzle, atomisation pressure 2.75MPa, spouting liquid 30Kg/ mu), after dispenser, after natural air drying, put in greenhouse and cultivate and observe.
5, weeds investigation 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, adopts the type of action of the mixed medicament of Colby method evaluation, further inquires into the reasonability of proportioning.
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 when consumption is (P+Q+W) (A+B+C);
E---the actual weeds survival rate that each is processed;
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
Table 1 pyrazosulfuron pyribenzoxim S-metolachlor is composite to the actual measurement survival rate of barnyard grass and theoretical survival rate
The mixed co-toxicity to barnyard grass of pyrazosulfuron, pyribenzoxim and S-metolachlor: pyribenzoxim, S-metolachlor have good preventive effect to barnyard grass, pyrazosulfuron is relatively poor to the preventive effect of barnyard grass, along with the increase of pyribenzoxim and S-metolachlor consumption, after using with, the preventive effect of barnyard grass is improved.
Table 2 pyrazosulfuron pyribenzoxim S-metolachlor is composite to the actual measurement survival rate of moleplant seed and theoretical survival rate
The mixed co-toxicity to moleplant seed of pyrazosulfuron, pyribenzoxim and S-metolachlor: pyribenzoxim, S-metolachlor have good preventive effect to moleplant seed, pyrazosulfuron is relatively poor to the preventive effect of moleplant seed, along with the increase of pyribenzoxim and S-metolachlor consumption, after using with, the preventive effect of moleplant seed is improved.
Table 3 pyrazosulfuron pyribenzoxim S-metolachlor is composite to the actual measurement survival rate of carp intestines and theoretical survival rate
The mixed co-toxicity to carp intestines of pyrazosulfuron, pyribenzoxim and S-metolachlor: pyrazosulfuron, pyribenzoxim are better to the preventive effect of carp intestines, S-metolachlor is relatively poor to the preventive effect of carp intestines, along with the increase of pyrazosulfuron, pyribenzoxim consumption, after using with, the preventive effect of carp intestines is improved.
Table 4 pyrazosulfuron pyribenzoxim S-metolachlor is composite to the actual measurement survival rate of Monochoria vaginalis and theoretical survival rate
The mixed co-toxicity to Monochoria vaginalis of pyrazosulfuron, pyribenzoxim and S-metolachlor: pyrazosulfuron, pyribenzoxim are better to the preventive effect of Monochoria vaginalis, S-metolachlor is relatively poor to the preventive effect of Monochoria vaginalis, along with the increase of pyrazosulfuron, pyribenzoxim consumption, after using with, the preventive effect of Monochoria vaginalis is improved.
Table 5 pyrazosulfuron pyribenzoxim S-metolachlor is composite to the actual measurement survival rate of difformed galingale herb and theoretical survival rate
The mixed co-toxicity to difformed galingale herb of pyrazosulfuron, pyribenzoxim and S-metolachlor: pyrazosulfuron, S-metolachlor are better to the preventive effect of difformed galingale herb, pyribenzoxim is relatively poor to the preventive effect of difformed galingale herb, along with the increase of pyrazosulfuron, S-metolachlor consumption, after using with, the preventive effect of difformed galingale herb is improved.
Toxicity Determination result shows, pyrazosulfuron, pyribenzoxim and S-metolachlor are mixed, the triangular weight ratio of pyrazosulfuron, pyribenzoxim and S-metolachlor is (0.3～1.5): (0.6～3): when (20～100), the preventive effect of weeds is belonged to synergy or summation action, in weight ratio, be (0.3～1.5): (0.6～1.2): when (20～40), preventive effect to weeds belongs to synergistic effect, has improved total preventive effect, has expanded herbicide spectrum.
The raw embodiment 2 that surveys:
The composite safety testing to paddy rice of pyrazosulfuron, pyribenzoxim and S-metolachlor
1, test objective
In order to study pyrazosulfuron, pyribenzoxim, S-metolachlor composite safety mutually, inventor has done following test, test is with reference to the agricultural industry criteria NY/T1155.8-2007 of People's Republic of China (PRC) farm-chemical indoor determination experiment criterion-weed killer herbicide, the 8th part: the safety testing cauline leaf spray-on process of crop.
2, reagent agent
The former medicine of 98% pyrazosulfuron
The former medicine of 95% pyribenzoxim
The former medicine of 96% S-metolachlor
3, for studying thing
Paddy rice of fish agriculture
For the cultivation that studies thing, adopt greenhouse pot culture method, by 11 * 12cm plastic basin, put in shallow-water tank, by using, the soil of adopting back in the farmland of weed killer herbicide was not air-dry, after sieving, filled basin, quantitative 4/5 place of dry ground in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, after making soil completely moistening, rice paddy seed is quantitatively broadcasted sowing in soil surface, according to seed size earthing 0.5cm～2.0cm, 28～32 ℃/18～25 ℃ of indoor temperatures (d/n), relative moisture 75% ± 15%.With the moisturizing of basin alms bowl bottom infiltrating irrigation mode, keep soil fully moistening.
4, for examination weeds
Barnyard grass, moleplant seed, carp intestines, Monochoria vaginalis, difformed galingale herb
Cultivation for examination weeds adopts greenhouse pot culture method, by 11 * 12cm plastic basin, puts in shallow-water tank, and by using, the soil of adopting back in the farmland of weed killer herbicide was not air-dry, after sieving, filled basin, quantitative 4/5 place of dry ground in basin, P in soil H value 7.0, the content of organic matter 1.2%.Adopt basin alms bowl bottom infiltrating irrigation mode, after making soil completely moistening, by pretreated, for examination weed seed, quantitatively broadcast sowing in soil surface, according to seed size earthing 0.5cm～2.0cm, 28～32 ℃/18～25 ℃ of indoor temperatures (d/n), relative moisture 75% ± 15%.With the moisturizing of basin alms bowl bottom infiltrating irrigation mode, keep soil fully moistening.After weeds emerge by barnyard grass, moleplant seed, be decided to be 10 strains, carp intestines, Monochoria vaginalis, difformed galingale herb are decided to be 5 strains.
5, experimental scheme
41 processing are established in this test altogether, wherein pyrazosulfuron establishes 0.25, 0.5, 1, 2, 5 dosage of 4g/ mu are processed, pyribenzoxim establishes 0.5, 1, 2, 4, 5 dosage of 8g/ mu are processed, S-metolachlor establishes 15, 30, 60, 120, 5 dosage of 240g/ mu are processed, the mixed 0.3+0.6+20 that sets up separately of pyrazosulfuron+pyribenzoxim+S-metolachlor three, 0.3+1.2+40, 0.3+1.8+60, 0.3+2.4+80, 0.3+3+100, 0.6+0.6+40, 0.6+1.2+60, 0.6+1.8+80, 0.6+2.4+100, 0.6+3+20, 0.9+0.6+60, 0.9+1.2+80, 0.9+1.8+100, 0.9+2.4+20, 0.9+3+40, 1.2+0.6+80, 1.2+1.2+100, 1.2+1.8+20, 1.2+2.4+40, 1.2+3+60, 1.5+0.6+100, 1.5+1.2+20, 1.5+1.8+40, 1.5+2.4+60, 1.5+3+80g/ 25 dosage ratios of mu are processed, separately establish an auxiliary agent contrast, amount to 41 processing, repeat 4 times.
6, test method
Until 3 leaf phases of paddy rice, grass family and 2～4 leaf phases of sedge weed, broad leaved weed 3～5 leaves, during the phase, put spray medicine (ASS-4 type pesticide spraying system in spray tower, DG8003 shower nozzle, atomisation pressure 2.75MPa, spouting liquid 30Kg/ mu), after dispenser, treat that natural air drying is placed on cultivation in greenhouse and observes.
7, crop investigation
After dispenser, investigation is respectively processed paddy rice and is had or not symptom of chemical damage, if having, records in detail symptom of chemical damage, grade, within after medicine 21 days, measures and respectively processes paddy rice fresh weight, calculates fresh weight inhibiting rate, the safety with clear and definite test medicine to paddy rice.
Table 6 poisoning evaluation index
| Poisoning classification | Poisoning degree (%) | Result is described |
| 0 | 0 | Safety, without poisoning |
| 1 | 1～10 | Without obviously poisoning |
| 2 | 11～30 | Slight poisoning |
| 3 | 31～50 | Moderate poisoning |
| 4 | ＞50 | Serious poisoning |
8, weeds investigation
After dispenser, periodical visual inspection is observed growth conditions, poisoning symptom and the poisoning degree of weeds, records symptom of chemical damage.Within after medicine 21 days, adopt growth inhibition assay to calculate the fresh weight preventive effect that each is processed.
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-processing weeds acrial part fresh weight, unit is gram.
9, results and analysis
Each processes table 7 preventive effect of weeds and the poisoning classification to paddy rice
By table 7, can find out that pyrazosulfuron pyribenzoxim S-metolachlor mixture compares in the situation that preventive effect is identical than single dose safety with single dose.
In sum, pyrazosulfuron pyribenzoxim S-metolachlor is composite significant synergistic effect, and to crop safety, complex preparation not only provides a kind of safe, practical weed killer herbicide for rice field, and greatly reduces the drug cost of enterprise and peasant household.
Claims (6)
1. a herbicidal composition, is characterized in that this herbicidal composition comprises (A) pyrazosulfuron, (B) pyribenzoxim and (C) three kinds of active components of S-metolachlor.
2. herbicidal composition according to claim 1, is characterized in that active component weight ratio is for (A) pyrazosulfuron: (B) pyribenzoxim: (C) S-metolachlor=(0.3-1.5): (0.6-3): (20-100).
3. herbicidal composition according to claim 2, is characterized in that active component weight ratio is for (A) pyrazosulfuron: (B) pyribenzoxim: (C) S-metolachlor=(0.3-1.5): (0.6-1.2): (20-40).
4. according to the herbicidal composition described in claim 1-3 any one, it is characterized in that the mass percent of active component in herbicidal composition is 1-50%.
5. herbicidal composition according to claim 1, is characterized in that this herbicidal composition can be the upper any formulation allowing of agricultural.
6. herbicidal composition according to claim 1, is characterized in that this herbicidal composition is for preventing and kill off paddy field grass family, sedge family and broad leaved weed.
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| CN1725952A (en) * | 2002-11-21 | 2006-01-25 | 辛根塔参与股份公司 | Herbicidal composition |
| EP1961304A1 (en) * | 2007-02-23 | 2008-08-27 | Isagro Ricerca S.r.l. | High efficiency formulation with a reduced environmental impact |
| CN103271061A (en) * | 2013-06-05 | 2013-09-04 | 江苏龙灯化学有限公司 | Synergistic weeding composition |
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