CN102379302A - Postemergence compound herbicide for wheat - Google Patents
Postemergence compound herbicide for wheat Download PDFInfo
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- CN102379302A CN102379302A CN2011104211385A CN201110421138A CN102379302A CN 102379302 A CN102379302 A CN 102379302A CN 2011104211385 A CN2011104211385 A CN 2011104211385A CN 201110421138 A CN201110421138 A CN 201110421138A CN 102379302 A CN102379302 A CN 102379302A
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- florasulam
- methyl
- wheat
- sulphurs
- grand
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- 241000209140 Triticum Species 0.000 title claims abstract description 59
- 235000021307 Triticum Nutrition 0.000 title claims abstract description 59
- 239000004009 herbicide Substances 0.000 title claims abstract description 32
- 230000002363 herbicidal effect Effects 0.000 title claims abstract description 26
- 150000001875 compounds Chemical class 0.000 title abstract description 7
- 239000005529 Florasulam Substances 0.000 claims abstract description 66
- QZXATCCPQKOEIH-UHFFFAOYSA-N Florasulam Chemical compound N=1N2C(OC)=NC=C(F)C2=NC=1S(=O)(=O)NC1=C(F)C=CC=C1F QZXATCCPQKOEIH-UHFFFAOYSA-N 0.000 claims abstract description 66
- 241000255964 Pieridae Species 0.000 claims description 61
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 61
- 239000000375 suspending agent Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 239000004562 water dispersible granule Substances 0.000 claims description 5
- 241000196324 Embryophyta Species 0.000 abstract description 57
- 230000002195 synergetic effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004480 active ingredient Substances 0.000 abstract description 3
- 238000009333 weeding Methods 0.000 abstract description 2
- NIFKBBMCXCMCAO-UHFFFAOYSA-N methyl 2-[(4,6-dimethoxypyrimidin-2-yl)carbamoylsulfamoyl]-4-(methanesulfonamidomethyl)benzoate Chemical group COC(=O)C1=CC=C(CNS(C)(=O)=O)C=C1S(=O)(=O)NC(=O)NC1=NC(OC)=CC(OC)=N1 NIFKBBMCXCMCAO-UHFFFAOYSA-N 0.000 abstract 3
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- 239000003814 drug Substances 0.000 description 31
- 238000012360 testing method Methods 0.000 description 24
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- 239000003153 chemical reaction reagent Substances 0.000 description 7
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- 238000002474 experimental method Methods 0.000 description 6
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- 238000011835 investigation Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 241000209761 Avena Species 0.000 description 2
- 235000005781 Avena Nutrition 0.000 description 2
- 235000007320 Avena fatua Nutrition 0.000 description 2
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- 241001101998 Galium Species 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 2
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- 238000000889 atomisation Methods 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 238000000205 computational method Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
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- 238000001228 spectrum Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- MPPOHAUSNPTFAJ-UHFFFAOYSA-N 2-[4-[(6-chloro-1,3-benzoxazol-2-yl)oxy]phenoxy]propanoic acid Chemical compound C1=CC(OC(C)C(O)=O)=CC=C1OC1=NC2=CC=C(Cl)C=C2O1 MPPOHAUSNPTFAJ-UHFFFAOYSA-N 0.000 description 1
- 108010000700 Acetolactate synthase Proteins 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 244000157790 Buglossoides arvense Species 0.000 description 1
- 235000004256 Buglossoides arvense Nutrition 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 241001233914 Chelidonium majus Species 0.000 description 1
- 239000005504 Dicamba Substances 0.000 description 1
- 239000005558 Fluroxypyr Substances 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 241001582888 Lobus Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000005584 Metsulfuron-methyl Substances 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229940100389 Sulfonylurea Drugs 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000005623 Thifensulfuron-methyl Substances 0.000 description 1
- WHDHEVMINMZADQ-UHFFFAOYSA-N [F].N1C=CC=C1 Chemical class [F].N1C=CC=C1 WHDHEVMINMZADQ-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- IWEDIXLBFLAXBO-UHFFFAOYSA-N dicamba Chemical compound COC1=C(Cl)C=CC(Cl)=C1C(O)=O IWEDIXLBFLAXBO-UHFFFAOYSA-N 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- MEFQWPUMEMWTJP-UHFFFAOYSA-N fluroxypyr Chemical compound NC1=C(Cl)C(F)=NC(OCC(O)=O)=C1Cl MEFQWPUMEMWTJP-UHFFFAOYSA-N 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000004459 forage Substances 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000009036 growth inhibition Effects 0.000 description 1
- 208000006278 hypochromic anemia Diseases 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- PUIYMUZLKQOUOZ-UHFFFAOYSA-N isoproturon Chemical compound CC(C)C1=CC=C(NC(=O)N(C)C)C=C1 PUIYMUZLKQOUOZ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- RSMUVYRMZCOLBH-UHFFFAOYSA-N metsulfuron methyl Chemical group COC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)NC1=NC(C)=NC(OC)=N1 RSMUVYRMZCOLBH-UHFFFAOYSA-N 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical class CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000007226 seed germination Effects 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- YROXIXLRRCOBKF-UHFFFAOYSA-N sulfonylurea Chemical class OC(=N)N=S(=O)=O YROXIXLRRCOBKF-UHFFFAOYSA-N 0.000 description 1
- AHTPATJNIAFOLR-UHFFFAOYSA-N thifensulfuron-methyl Chemical group S1C=CC(S(=O)(=O)NC(=O)NC=2N=C(OC)N=C(C)N=2)=C1C(=O)OC AHTPATJNIAFOLR-UHFFFAOYSA-N 0.000 description 1
- -1 triazolopyrimidine sulfonamides Chemical class 0.000 description 1
- YMXOXAPKZDWXLY-QWRGUYRKSA-N tribenuron methyl Chemical group COC(=O)[C@H]1CCCC[C@@H]1S(=O)(=O)NC(=O)N(C)C1=NC(C)=NC(OC)=N1 YMXOXAPKZDWXLY-QWRGUYRKSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to the technical field of herbicides, and discloses a postemergence compound herbicide for wheat. The postemergence compound herbicide for wheat contains two types of active ingredients, namely, mesosulfuron-methyl and florasulam, wherein the weight ratio of the mesosulfuron-methyl to the florasulam is (2-4):1, and preferably, the weight percentage of the mesosulfuron-methyl and the florasulam is 0.1-85% of the compound herbicide. The compound herbicide disclosed by the invention both can be used for preventing and killing off annual grass weeds and broadleaf weeds in wheat lands, and has a significant weeding effect, a remarkable synergistic effect, and no effect on after-reap crops, therefore, the compound herbicide is an ideal herbicide.
Description
Technical field
The present invention relates to technical field of pesticide, be specifically related to a kind of mixed herbicide of wheat after seedling.
Background technology
Wheat is one of staple food crop of northern China, also is important forage crop, and the long-term cultivated area of China is only second to the paddy rice cultivated area at more than 3,000 ten thousand hectares.Wheatland crop smothering area accounts for more than 30% of total cultivated area, and wherein serious injured area is more than 8%, and the general underproduction can be had no harvest when serious more than 15%.Therefore, the usage ratio of domestic wheat paddock weed killer herbicide almost reaches 100%, and its dosage is very big.At present; Behind the domestic wheat paddock seedling there be the main medicament of weed killer herbicide of management of weeds: fenoxaprop, methyl two sulphurs are grand, fluorine azoles sulphur is grand, tribenuron-methyl, fluroxypyr, dicamba, metsulfuron-methyl, thifensulfuron methyl, isoproturon etc.; But because of using for many years, many weeds have produced pesticide resistance, cause its consumption to strengthen; Make wheat produce recessive poisoning and the underproduction easily, and also not too safe to succession crop.In addition, because the use of chemical herbicide for many years, variation has taken place in the weed control of China, and originally the north is that main, south is to act the leading role to become that the South and the North is grass family and broad leaved weed coexists with the broad leaved weed with the grassy weed.So just press for and can prevent and kill off the wheat paddock grassy weed, can prevent and kill off broad leaved weed again, neither influence the safety of succession crop, friendly to environment again weed killer herbicide, and this type of weed killer herbicide of China is seldom seen at present.
Methyl two sulphurs are grand to be selective herbicide behind the sulfonylurea inner sucting conduction type seedling, is the inhibitor of acetolactate synthase.Grass cutting blade promptly stops growing after absorbing medicament, withered gradually.The longevity of residure of this medicine in soil is short, does not influence the second stubble crop growth.Be mainly used in wheat, naked barley etc. remove grassy weed and some broad leaved weed.
Florasulam is a triazolopyrimidine sulfonamides super-high-efficient weed killer herbicide, and florasulam is the inner sucting conduction type weed killer herbicide, can conduct to the weeds complete stool, thereby kills grass thoroughly, can not recur.Efficacy stability at low temperatures, even in the time of 2 ℃, still can guarantee to stablize drug effect, this point is that other weed killer herbicides are incomparable.Be used for wheat paddock and prevent and kill off broad leaved weed.The florasulam broad weed-killing spectrum can be prevented and kill off the most of broad leaved weeds of wheatland, comprises difficult anti-weeds such as clearvers, corn gromwell, and the most difficult wartwort of preventing and kill off in the wheatland is had extraordinary inhibitory action.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can prevent and kill off grassy weed, can prevent and kill off broad leaved weed again, and respond well mixed herbicide of wheat after seedling.。
In order to realize the foregoing invention purpose, the present invention provides following technical scheme:
A kind of mixed herbicide of wheat after seedling comprises the grand and florasulam of methyl two sulphurs, and the grand weight ratio with florasulam of methyl two sulphurs is 2～4: 1.
More preferably, the grand weight ratio with florasulam of methyl two sulphurs is 3: 1 in the complex weedicide according to the invention.
On the other hand, the grand quality percentage composition with florasulam of methyl two sulphurs in the said complex weedicide is provided is 0.1～85% of said complex weedicide in the present invention.As preferably, in the complex weedicide according to the invention, methyl two sulphurs grand with two kinds of active components of florasulam according to above-mentioned weight ratio composite after, process oil-suspending agent, suspending agent, wetting powder, water dispersible granules (dry suspending agent).
Synergy after being mixed with the co-toxicity coefficient method evaluation of Sun Yunpei; The result shows that methyl two sulphurs are grand, florasulam is in 2～4: the composite co-toxicity coefficient of 1 ratio is obviously greater than 120; Reach remarkable synergistic effect, explain that methyl two sulphurs are grand, florasulam is in 2～4: 1 ratio is mixed all has synergistic effect, wherein; Methyl two sulphurs are grand, florasulam is maximum by the effect of 3: 1 effect compound synergics, and annual single broadleaf weed is had significant synergies.
Safety determination test to wheat shows that the composite cauline leaf of the grand florasulam of methyl two sulphurs is handled, and suppresses the ED of wheat growth 10%
10=633.5774, the ED of inhibition weed growth 90%
90=147.8637, selectivity factor is 633.5774/147.8637=4.28＞2, thinks that this medicament has obvious selectivity, and the grand florasulam of methyl two sulphurs has good safety to wheat.
Complex weedicide according to the invention shows through the field control effectiveness test in 2 years, arrives period of seedling establishment in the 3 leaf phases of wheat, and weeds 1-5 leaf does not wait the phase, and wheat is not seen symptom of chemical damage from the dispenser to the maturing stage, to wheat safety.The preventive effect of weeds reached more than 80% in 20 days, reached more than 90% in 60 days, along with the increase of dosage; Preventive effect obviously strengthens, and a dispenser can be controlled the weeds in the crop whole growth phase, and not only herbicidal effect is remarkable; And environmentally friendly, second stubble crop there is not influence.
Compared with prior art, complex weedicide according to the invention can be prevented and kill off grassy weed, can prevent and kill off broad leaved weed again, to wheat safety, and succession crop is not had influence, has a good application prospect.
Embodiment
The invention discloses a kind of grand mixed herbicide of wheat after seedling with two kinds of active components of florasulam of methyl two sulphurs that comprises, those skilled in the art can use for reference this paper content, suitably improve technological parameter and realize.Special needs to be pointed out is that all similarly replace and change apparent to those skilled in the art, they all are regarded as and are included in the present invention.Product of the present invention and application are described through preferred embodiment; The related personnel obviously can change or suitably change and combination methods and applications as herein described in not breaking away from content of the present invention, spirit and scope, realizes and use technology of the present invention.
Below in conjunction with embodiment, further set forth the present invention:
Embodiment 1: (methyl two sulphurs are grand: florasulam=2: 1) to prepare the oil-suspending agent of complex weedicide according to the invention
6% methyl, two sulphurs swell the florasulam oil-suspending agent, and 6% is meant that methyl two sulphurs are grand accounts for the percentage of gross weight with two kinds of active components of florasulam.It is grand to get 4kg methyl two sulphurs, the 2kg florasulam, and 8kg Pluronic125, the 5kg propane diols, the 0.5kg xanthans, the 1kg methylated vegetable oil, water complements to 100kg.Pass through abundant mixing preparation, ball mill grinding, adjust, be packaged to be oil-suspending agent.
Embodiment 2: (methyl two sulphurs are grand: florasulam=3: 1) to prepare the wetting powder of complex weedicide according to the invention
28% methyl, two sulphurs swell the florasulam wetting powder, and 28% is meant that methyl two sulphurs are grand accounts for the percentage of gross weight with two kinds of active components of florasulam.It is grand to get 21kg methyl two sulphurs, the 7kg florasulam, and 4kg dispersant NNO, 3kg wetting agent K12, the white carbon black of 4kg, precipitated calcium carbonate complements to 100kg.Through fully mixing, comminution by gas stream, mixing, obtain wetting powder.
Embodiment 3: (methyl two sulphurs are grand: florasulam=4: 1) to prepare the water dispersible granules of complex weedicide according to the invention
50% methyl, two sulphurs swell the florasulam water dispersible granules, and 50% is meant that methyl two sulphurs are grand accounts for the percentage of gross weight with two kinds of active components of florasulam.It is grand to get 40kg methyl two sulphurs, the 10kg florasulam, and 7kg D-425,5kgEFW, 5kg ammonium sulfate, the 2kg polyethylene glycol, kaolin supplies 100%, obtains water dispersible granules through fully mixing, comminution by gas stream, mixing, granulation, drying and screening.
Embodiment 4: methyl two sulphurs are grand handles the indoor determination of activity of synergy with the florasulam cauline leaf
1, test objective
Under greenhouse experiment; Adopt the pot experiment method; Research methyl two sulphurs are grand, the herbicidal effect of florasulam binary built; And the synergy type after using with the two different proportion of co-toxicity coefficient method evaluation of Sun Yunpei, with rationally being mixed of florasulam scientific basis is provided for methyl two sulphurs are grand.
2, experimental condition
2.1 supply to study the thing wheat breed: Anhui wheat 33
2.2 for the test weed Sophia (Descurainia? Sophia (L.) Schur), cleavers (Galium? Aparine? L.), Wang grass (Beckmannia? Syzigachne (Steud.) Fern), wild oat (Avena ? fatua? L.) seeds harvested field last year, the germination rate above 85%).
2.3 the cultivation of experimental condition and examination material
In the illumination cultivation chamber, the make an experiment cultivation of material, temperature 15-20 ℃.Choosing diameter is 15cm, highly is the vinyon basin alms bowl of 15cm, and the permeable hole of 1cm diameter is beaten in the bottom of basin alms bowl.Permeable hole covers with double-deck filter paper, and soil is soaked into clear water from the bottom in the high 10cm of loam to the alms bowl place that the preparation in advance of packing in the alms bowl was sterilized.During test, every kind of weed seed 30-40 grain is evenly put into basin, earthing 0.5cm should replenish the required moisture of growth between the weeds culture period.
2.4 other condition
With the regular moisturizing of mode (not watering in 2 days behind the medicine) of bottom infiltration, keep soil moisture.
3 experimental scheme
3.1 medicament
3.1.1 supply the reagent agent
93% methyl, two sulphurs swell former medicine (Bayer crop science company);
The former medicine of 97% florasulam (The Dow Agrosciences, LLC.).
3.1.2 supply the preparation of reagent agent soup
Take by weighing quantitative former medicine with electronic balance, add an amount of emulsifier, use acetone solution, with 0.1% soil temperature 80 aqueous solution above-mentioned former medicine is diluted to desired concn at last.
3.1.3 experimental scheme
3.1.3.1 methyl two sulphurs are grand and the synergy of florasulam
Methyl two sulphurs are grand, florasulam list agent and 5 methyl two sulphurs are grand establishes 5 dosage respectively with the florasulam mixture preparation, and said ratio is the grand active component weight ratios with florasulam of methyl two sulphurs.Other establishes blank, and repetition 4 times is handled in each test.Handle drug dose and see table 1 for details.
Table 1 test is handled and test level (concentration ga.i./mu)
3.2 application method
3.2.1 application method
Handle in 3 leaf phases of wheat, the spraying of weeds 2-4 leaf phase cauline leaf.The spray medicine adopts the indoor overhead traveling crane formula spray testing device of adjustable speed, the conventional spray method in simulation field.Shower nozzle is a Fan spray head, and model is the Teejer8002E type, 40 kilograms/mu of spray values.0.5 meter of spray height, 0.7 meter of spraying swath, leg speed 0.224 meter per second.Atomisation pressure 2.0 MPas, 697 liters/minute of flows.
3.2.2 spraying time and number of times
Tested in the wheat 3-5 leaf phase and carry out reagent spray processing, dispenser 1 time.
4 investigation methods
The symptom of being injured of detail record wheat and weeds after the dispenser, 20d behind the medicine carries out fresh weight and measures, and compares with control treatment, calculates the fresh weight preventive effect.
4.1 synergy assay method
Synergy type after result of the test is used with the co-toxicity coefficient method evaluation of Sun Yunpei.
According to SUN, Y-P (Sun Yunpei) method is calculated its actual toxicity index, the theoretical toxicity index of mixture, co-toxicity coefficient.With the concentration logarithm is X, and damage by disease and insect preventive effect probit value is Y, asks regression equation.
Actual toxicity index=standard medicament LD
50The LD of/mixture
50* 100
Theoretical toxicity index=∑ (supplying the toxicity index * percentage of this medicament active ingredient in mixture of reagent agent)
The actual toxicity index of co-toxicity coefficient=mixture/theoretical toxicity index * 100
Be the standard medicament with the florasulam in the test.
Criterion: co-toxicity coefficient＜80 are antagonism, are summation action between 80-120, and＞120 are synergistic effect.
5 results and analysis
5.1 methyl two sulphurs are grand and the synergy of florasulam
Be mixed to the fresh weight preventive effect of weeds with florasulam 5.1.1 methyl two sulphurs are grand, the result sees table 2.
Table 2 methyl two sulphurs are grand to be mixed behind the medicine 20d to the fresh weight preventive effect of weeds with florasulam
Control efficiency is the mean value of four data in the table.
Be mixed to the synergy of weeds with florasulam 5.1.2 methyl two sulphurs are grand
Can be known by table 2: medicament is to toxic action situation and the preventive effect of weeds.Calculate its virulence regression equation, LD separately through formula
50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.List in table 3.
Table 3: methyl two sulphurs are grand to be mixed to the synergy of weeds with florasulam
Can know that by test the co-toxicity coefficient of handling C, D, E, F, G is respectively: 95.81,130.76,227.34,141.51,93.03, wherein, the co-toxicity coefficient of C, G is addition greater than 80, less than 120; The co-toxicity coefficient of D, E, F reaches remarkable synergistic effect all obviously greater than 120, and the co-toxicity coefficient of wherein handling E is maximum.
5.1.3 conclusion (of pressure testing)
Can know that through test methyl two sulphurs are grand, florasulam is mixed in 2: 1～4: 1 ratios all has synergistic effect, wherein, it is comparatively suitable that methyl two sulphurs are grand, florasulam was mixed by about 3: 1, and annual dicotyledonous weeds is had significant synergies.
6 overall merits
Measure the result by above synergy and show, methyl two sulphurs are grand, and the two is better with the composite effect of 2: 1～4: 1 ratio with florasulam, wherein with 3: 1 composite best results of left and right sides ratio.
Embodiment 5: the composite cauline leaf of the grand florasulam of methyl two sulphurs is handled the safety determination test to wheat
1, test objective:
Under greenhouse experiment, adopt the pot experiment method, research methyl two sulphurs are grand, florasulam binary built cauline leaf is handled the safety to wheat, with rationally being mixed of florasulam scientific basis are provided for methyl two sulphurs are grand.
2, experimental condition
2.1 supply to study the thing wheat breed: Anhui wheat 33
2.2 for the test weeds sophia (Descurainia? Sophia (L.) Schur), cleavers (Galium? Aparine? L.), Wang grass (Beckmannia? Syzigachne (Steud.) Fern), wild oat (Avena? Fatua ? L.) (previous year field harvest seed germination rate above 85%).
2.3 the cultivation of experimental condition and examination material
In the illumination cultivation chamber, the make an experiment cultivation of material, temperature 15-25 ℃.Choosing diameter is 15cm, highly is the vinyon basin alms bowl of 15cm, and the permeable hole of 1cm diameter is beaten in the bottom of basin alms bowl.Permeable hole covers with double-deck filter paper, and soil is soaked into clear water from the bottom in the high 10cm of loam to the alms bowl place that the preparation in advance of packing in the alms bowl was sterilized.During test, 20, every kind weed seed 30-40 of wheat seed grain is evenly put into basin earthing 0.5cm, put into the greenhouse and cultivate (15-25 ℃), should replenish the required moisture of growth between wheat seedling and weeds culture period.Stay the healthy and strong seedling of 10 strains after all sprouting, treat that wheat seedling length to 3～4 leaves and weeds grow to handle to dispenser in 3～5 o'clock.
2.4 other condition
With the regular moisturizing of mode (not watering in 2 days behind the medicine) of bottom infiltration, keep soil moisture.
3 experimental scheme
3.1 medicament
3.1.1 supply the reagent agent
93% methyl, two sulphurs swell former medicine (Bayer crop science company);
The former medicine of 95% florasulam (The Dow Agrosciences, LLC.).
3.1.2 supply the preparation of reagent agent soup
Take by weighing quantitative former medicine with electronic balance, add an amount of emulsifier, use acetone solution, with 0.1% soil temperature 80 aqueous solution above-mentioned former medicine is diluted to desired concn at last.
3.2 application method
3.2.1 application method
Handle in 3 leaf phases of wheat, the spraying of weeds 2-4 leaf phase cauline leaf.The spray medicine adopts the indoor overhead traveling crane formula spray testing device of adjustable speed, the conventional spray method in simulation field.Shower nozzle is a Fan spray head, and model is the Teejer8002E type, 40 kilograms/mu of spray values.0.5 meter of spray height, 0.7 meter of spraying swath, leg speed 0.224 meter per second.Atomisation pressure 2.0 MPas, 697 liters/minute of flows.
3.2.2 spraying time and number of times
Tested in the 3 leaf phases of wheat and carry out reagent spray processing, dispenser 1 time.
4 investigation and computational methods
4.1 crop investigation
After the dispenser, investigation is respectively handled wheat and is had or not symptom of chemical damage, if then detail record symptom of chemical damage, grade are arranged, and behind the medicine 20 days, measure and respectively handle the wheat fresh weight, calculate the fresh weight inhibiting rate, with of the safety of clear and definite test medicine to wheat.
4.2 weeds investigation
The symptom of being injured of detail record weeds (like growth inhibition, chlorosis, deformity etc.) after the dispenser, behind medicine 20 days, weeds acrial part fresh weight was respectively handled in weighing, calculated the fresh weight preventive effect of weeds.
4.3 computational methods
With DPS software the logarithm value of drug dose and the probability value of wheat fresh weight inhibiting rate are carried out regression analysis, the dosage ED when calculating correlation coefficient and suppressing crop 10%
10, and suppress weeds 90%ED
90, obtain selectivity index.
Selectivity index=ED
10/ ED
90
5 results and analysis
5.1 the grand florasulam cauline leaf of methyl two sulphurs is handled the safety to wheat
The safety evaluatio standard is seen table 4, observes in 3 days after the dispenser, and the grand florasulam high concentration 3600mg/kg of methyl two sulphurs handles indivedual wheat lobus cardiacus distortions, and growth is suppressed, and it is normal basically that low concentration is handled wheat growth; After the dispenser 7-12 days, it is normal that low concentration is handled the wheat growing way, and 3600mg/kg handles wheat and also slowly recovers.The 20 days 50% grand florasulam WG of methyl two sulphurs see table 5 to the inhibitory action of wheat after the dispenser.
Table 4 activity of weeding and crop safety ocular estimate evaluation criterion
The grand florasulam WG of table 550% methyl two sulphurs is to the inhibitory action of wheat
| Handle | Mass concentration (mg/kg) | 20d inhibiting rate (%) |
| 225 | ?0.25 | |
| 450 | ?0.75 | |
| 50% methyl, two sulphurs swell florasulam WG | 900 | ?2.00 |
| 1800 | ?7.50 | |
| 3600 | ?20.25 | |
| Contrast | Clear water | ?/ |
The grand florasulam WG of table 6 50% methyl two sulphurs is to the fresh weight preventive effect of weeds
Can know toxic action situation and the preventive effect of this medicament by table 6, calculate its virulence regression equation, LD respectively through formula to weeds
50, list in table 7.
Table 7: virulence regression equation and LD
50
| Handle | Regression equation | Correlation coefficient | LD 50 | 95% confidence interval |
| A | Y＝-0.2323+2.3570x | 0.9925 | 165.9346 | 143.8011-191.4749 |
Can be known by table 7: the LD50 of the grand florasulam WG of 50% methyl, two sulphurs is: 165.9346,95% confidence intervals are 143.8011-191.4749.
5.2 the grand florasulam cauline leaf of methyl two sulphurs is handled the selectivity index to wheat and weeds
By table 5, table 6, try to achieve the ED that suppresses wheat growth 10% through DPS software
10=2182.5620, the ED of inhibition weed growth 90%
90=561.1078, selectivity factor is 2182.5620/561.1078=3.89＞2, thinks that this medicament has obvious selectivity, can carry out field control effectiveness test.
6 overall merits
6.1 this result of the test shows that the grand florasulam cauline leaf treatment of high concentration of methyl two sulphurs is handled and can be caused wheat yellow, indivedual plant distortion to wheat, it is normal that other concentration is handled wheat growth.
6.2 can know that through Toxicity Determination the grand florasulam of methyl two sulphurs has good control efficiency to weeds.
Embodiment 6: complex weedicide field control effectiveness test according to the invention
Complex weedicide according to the invention shows through the field control effectiveness test in 2 years; Wheat period of seedling establishment before the winter, weeds 1-5 leaf does not wait the phase, utilizes 28% methyl, two sulphurs of the present invention to swell florasulam (24% methyl, two sulphurs swell+8% florasulam) wetting powder (WP) dosage 3,4,5,8 gram/mus; Converting water sprays for 40 kilograms/mu; 20,60 days and maturing stage range estimation wheat safety and weeds preventive effect, surveyed at preventive effect result such as following table in 20,60 days:
Through range estimation, wheat is not seen symptom of chemical damage from the dispenser to the maturing stage, to wheat safety.Preventive effect 20 gram/mus to weeds reached more than 80% in 20 days; Reached more than 90% in 60 days, along with the increase of dosage, preventive effect obviously strengthens; Can good herbicidal effect be arranged to weeds at wheat paddock 3 gram/mus; Compare with wherein a kind of active ingredient of independent use, enlarged and killed the grass spectrum, grassy weed and broad leaved weed are had obvious synergistic effect.A dispenser can be controlled the weeds in the crop whole growth phase, and not only herbicidal effect is remarkable, and environmentally friendly, and second stubble crop is not had influence, and is little to the pollution of environment, to people, animal, birds and beneficial organism safety, helps keeping ecological balance.In addition, weed killer herbicide of the present invention adopts physical method processing, and production technology is simple, and three-waste free discharge in the production process has no adverse effects to ecotope.It is the desirable complex weedicide of present control efficiency.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (4)
1. a mixed herbicide of wheat after seedling is characterized in that, comprises the grand and florasulam of methyl two sulphurs, and the grand weight ratio with florasulam of methyl two sulphurs is 2～4: 1.
2. complex weedicide according to claim 1, more preferably, the grand weight ratio with florasulam of methyl two sulphurs is 3: 1.
3. according to claim 1,2 described complex weedicides, it is characterized in that the grand quality percentage composition with florasulam of methyl two sulphurs is 0.1～85% of a said complex weedicide.
4. according to each described complex weedicide of claim 1-3, it is characterized in that said complex weedicide is oil-suspending agent, suspending agent, wetting powder, water dispersible granules (dry suspending agent).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102550585A (en) * | 2012-01-16 | 2012-07-11 | 河北博嘉农业有限公司 | Mesosulfuron-methyl compound herbicide |
| CN104186518A (en) * | 2014-08-19 | 2014-12-10 | 青岛清原植保服务有限公司 | Herbicide safener composition |
| CN106342858A (en) * | 2016-08-26 | 2017-01-25 | 安徽久易农业股份有限公司 | Post-emergence compound herbicide for wheat fields |
| CN106342859A (en) * | 2016-08-26 | 2017-01-25 | 安徽久易农业股份有限公司 | Mesosulfuron oil suspending agent |
| CN107156163A (en) * | 2017-07-14 | 2017-09-15 | 安徽海日生物科技有限公司 | A kind of mesosulfuron and florasulam compound dispersible oil-suspending agent and preparation method thereof |
| CN107318873A (en) * | 2017-08-16 | 2017-11-07 | 安徽尚禾沃达生物科技有限公司 | A kind of Herbicidal combinations containing mesosulfuron and florasulam |
| CN109380249A (en) * | 2018-12-03 | 2019-02-26 | 浙江中山化工集团股份有限公司 | A kind of herbicide composition for wheat field |
| CN111328822A (en) * | 2020-04-20 | 2020-06-26 | 山东碧奥生物科技有限公司 | Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof |
| CN115152779A (en) * | 2022-08-17 | 2022-10-11 | 淄博新农基农化科技有限公司 | Novel weeding composition |
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| CN107318873B (en) * | 2017-08-16 | 2019-07-02 | 安徽尚禾沃达生物科技有限公司 | A kind of Herbicidal combinations containing mesosulfuron and florasulam |
| CN109380249A (en) * | 2018-12-03 | 2019-02-26 | 浙江中山化工集团股份有限公司 | A kind of herbicide composition for wheat field |
| CN111328822A (en) * | 2020-04-20 | 2020-06-26 | 山东碧奥生物科技有限公司 | Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof |
| CN115152779A (en) * | 2022-08-17 | 2022-10-11 | 淄博新农基农化科技有限公司 | Novel weeding composition |
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