CN115053911A - Herbicide composition containing topramezone and pinoxaden - Google Patents
Herbicide composition containing topramezone and pinoxaden Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P13/00—Herbicides; Algicides
Abstract
The invention discloses a herbicide composition containing sulfuryl pyraflufen-ethyl and pinoxaden, which comprises a weeding active ingredient A, a weeding active ingredient B and a safe active ingredient C; the weeding active ingredient A is the sulpirfen-ethyl, the weeding active ingredient B is the pinoxaden, and the safe active ingredient C is the mefenpyr-diethyl; the mass ratio of the weeding active ingredient A to the weeding active ingredient B to the safe active ingredient C is 2-6: 1-2: 1-3. The herbicide composition is sprayed on stems and leaves of early seedling stage and 1-2 leaf stage of weeds of wheat, can effectively prevent and kill drug-resistant weeds in wheat fields, particularly resistant gramineous weeds such as Japanese foxtail, and has good safety and excellent control effect on wheat.
Description
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a herbicide composition containing sulfuryl pyraflufen-ethyl and pinoxaden. The herbicide composition comprises a weeding active ingredient A, a weeding active ingredient B and a safe active ingredient C. The active component A is the sulphone pyraflufen-ethyl, the active component B is the pinoxaden or the mesosulfuron, and the active component C is the mefenpyr-diethyl.
Background
Farmland weeds are a type of pest that seriously threatens the growth of crops. Weeds compete with wheat for illumination, moisture, nutrients and the like, and the safe production of wheat is seriously affected. The herbicide is the most economic and effective means for controlling the harm of weeds in modern agricultural production; however, with the unscientific use of herbicides, various problems such as weed drug resistance and frequent wheat phytotoxicity are brought. Therefore, the development of a herbicide composition which can effectively prevent and kill resistant weeds and is safe to wheat and the optimization of herbicide application technology are of great significance.
Pyraflufen-ethyl (Pyroxasulfone), molecular formula C 12 H 14 F 5 N 3 O 4 S, chemical name 3- [5- (difluoromethoxy) -1-methyl-3- (trifluoromethoxy) pyrazol-4-ylmethylsulfonyl]-4, 5-dihydro-5, 5-dimethyl-1, 2-isoxazole. The sulfonepyrazoxazole is an isoxazole herbicide and has the function of inhibiting plant cell division. The herbicide was first discovered by the K-I chemistry of Japan, and then was industrially produced by the combination of the Japanese combinatorial chemistry and the Japanese fomentation chemistry. The topramezone is mainly used for preventing and killing various gramineous weeds by soil spraying. The structural formula is as follows:
pinoxaden (Pinoxaden), formula C 23 H 32 N 2 O 4 Chemical name of 8- (2, 6-diethyl-4-methylphenyl) -1,2,4, 5-tetrahydro-7-oxo-7H-pyrazolo [1, 2-d)][1,4,5]Oxadiazepin-9-yl 2, 2-dimethylpropionate. Pinoxaden is a phenylpyrazoline herbicide with the target of action being the acetyl-CoA carboxylase of plants. Pinoxaden can cause the synthesis of plant fatty acids to be hindered and cell division to stop, resulting in plant death. The pesticide has systemic transmission property, and is mainly used for preventing and killing various gramineous weeds by spraying stem leaves after seedling. The structural formula is as follows:
mesosulfuron-methyl (Mesosulfuron-methyl) with molecular formula C 17 H 21 N 5 O 9 S 2 The chemical name is 2- [3- (4, 6-dimethoxypyrimidin-2-yl) urea sulfonyl]-4-methanesulfonamide methyl benzoate. The mesosulfuron-methyl is sulfonylurea herbicide, and the action target is acetolactate synthetase of plant. The herbicide is mainly absorbed by stems and leaves of plants, is conducted through phloem and xylem, inhibits the activity of acetolactate synthase in sensitive plants, leads to the synthesis of branched chain amino acid to be hindered, thereby inhibiting cell division and leading to the death of the sensitive plants, and is mainly used for preventing and killing various gramineous weeds and part of broadleaf weeds by spraying the stems and leaves after seedling. The structural formula is as follows:
mefenpyr-diethyl (Mefenpyr-diethyl) with molecular formula of C 16 H 18 Cl 2 N 2 O 4 The chemical name of the compound is 1- (3, 4-dichlorophenyl) -5-methyl-2-pyrazoline-3, 5-dicarboxylic acid diethyl ester. Pyrazolidone is a pyrazole safener developed by the company Amentte, with herbicidesThe agent can be used together to prevent damage of herbicide to wheat and barley. The structural formula is as follows:
in order to solve the practical problems in agricultural production, the invention provides a herbicide composition containing pyraflufen-ethyl, pinoxaden or mesosulfuron-methyl and mefenpyr-diethyl by combining the characteristics of different herbicides.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a herbicide composition containing pyraflufen-ethyl, pinoxaden or mesosulfuron and mefenpyr-diethyl. The herbicide composition is sprayed on stems and leaves of early-stage wheat seedling and 1-2 leaf stages of weeds, can effectively prevent and kill drug-resistant weeds in wheat fields, particularly resistant gramineous weeds such as Japanese foxtail, and has good safety and excellent prevention and control effect on wheat.
The invention is realized by the following technical scheme
A safe and efficient herbicide composition for controlling drug-resistant weeds in wheat fields comprises the following components in a mass ratio of 1-60: 1-20: 1-20 of a herbicidal active ingredient A, a herbicidal active ingredient B and a safe active ingredient C; the weeding composition comprises a weeding active ingredient A, a weeding active ingredient B, a safety active ingredient C and a weeding active ingredient B, wherein the weeding active ingredient A is sulpyraflufen-ethyl, the weeding active ingredient B is pinoxaden or mesosulfuron-methyl, and the safety active ingredient C is mefenpyr-diethyl.
Further, when the weeding active ingredient B is pinoxaden, the mass ratio of the weeding active ingredient A to the weeding active ingredient B to the safe active ingredient C is 2-6: 1-2: 1-3; when the weeding active ingredient B is mesosulfuron-methyl, the mass ratio of the weeding active ingredient A to the weeding active ingredient B to the safe active ingredient C is 12-60: 1-2: 1-4.
Furthermore, the herbicide composition also comprises auxiliary materials (such as components of an auxiliary agent and/or an additive) which are allowable on pesticides; the auxiliary materials are selected from one or more than two of wetting agent, dispersant, filler, emulsifier, disintegrant, stabilizer, defoamer, thickener, antifreeze and solvent.
Specifically, in the herbicide composition of the invention, the sum of the weight of the active ingredients A and B is 5-90%, particularly preferably 20-50% of the total weight of the herbicide composition.
The invention provides a safe and efficient herbicide composition for preventing and treating drug-resistant weeds in wheat fields, which comprises the following raw materials in percentage by weight: 20% of pyraflufen-ethyl, 1-10% of pinoxaden or mesosulfuron-methyl, 2-10% of mefenpyr-diethyl, 2-3% of agricultural emulsion 600#, 1-2% of diisooctyl succinate sodium sulfonate, 1-3% of sodium methylene dinaphthalene sulfonate, 2-3% of gelatin, 10-12% of ethylene glycol, 2-3% of lignin calcium carbonate and the balance of water.
The invention provides a safe and efficient herbicide composition for preventing and treating drug-resistant weeds in wheat fields, which is characterized by comprising the following raw materials in percentage by weight: 18-45% of pyraflufen-ethyl, 1-6% of pinoxaden or mesosulfuron-methyl, 3-12% of mefenpyr-diethyl, 5-6% of sodium methylene dinaphthalene sulfonate, 4% of fatty alcohol-polyoxyethylene ether, 710-12% of NP-710, 5-6% of bentonite and the balance methyl oleate.
The invention also provides application of the safe and efficient herbicide composition in preventing and removing weeds in wheat fields, and specifically comprises the following components: the safe and efficient herbicide composition is sprayed in the early post-emergence stage of wheat and when weeds are in the 1-2 leaf stage, so as to prevent and kill drug-resistant gramineous weeds such as Nibeautyberry and the like.
Compared with the prior art, the herbicide composition has the following beneficial effects:
the herbicide composition can effectively prevent and kill resistant weeds in wheat fields, particularly resistant gramineous weeds such as the Japanese foxtail and the like, weeds in the wheat fields have common drug resistance to the herbicide, and particularly the gramineous weeds such as the Japanese foxtail and the alopecurus fargesii have serious resistance to fenoxaprop-p-ethyl and clodinafop-propargyl in the wheat fields. The topramezone belongs to isoxazole herbicides, is a novel closed herbicide for wheat fields, and has obvious effect on various drug-resistant weeds. The pinoxaden and the mesosulfuron are respectively phenyl pyrazoline herbicides and sulfonylurea herbicides, and the two herbicides have excellent control effect on drug-resistant weeds. The selection of high-efficiency herbicides with completely different action mechanisms is an important strategy for controlling the drug resistance of weeds and delaying the generation of the drug resistance of weeds. According to the invention, according to the occurrence condition of drug resistance of weeds, any one of pinoxaden and mesosulfuron is selected to be matched with the topramezone for weed control, so that the weeds can be effectively controlled.
The herbicide composition disclosed by the invention is high in safety. The herbicide can effectively prevent and kill weeds and easily cause phytotoxicity to crops. If the topramezone, pinoxaden and mesosulfuron are not used properly, the drug injury is easy to occur, and particularly, the drug application apparatus is unscientific and meets the conditions of low-temperature water accumulation and the like. The safety of the herbicide composition on wheat is improved by adding the safener pyracloquintocet-mexyl, the occurrence of wheat phytotoxicity is effectively avoided, the safe production of wheat is ensured, and weeds are effectively prevented and removed.
The herbicide composition has excellent control effect. The control effect is excellent in two aspects, namely, the first, the topramezone and the pinoxaden or the mesosulfuron have the synergistic effect on controlling the emerged weeds through reasonable proportioning combination. And secondly, the pyraflufen-ethyl is mainly used for preventing and removing weeds by soil sealing, so that the control effect on the emerged weeds is poor. Pinoxaden and mesosulfuron-methyl are used for preventing and killing emerging weeds through stem and leaf treatment, and the effect is excellent. Weeds in the wheat field can continuously emerge, the conventional method adopts soil treatment, and the effect of the weeds emerging in the later period is poor due to limited duration of the medicament; the simple adoption of the stem and leaf treatment can easily cause the weed prevention leakage of the seedling emergence in the later period, and the total prevention effect is not ideal. The herbicide composition selects the soil treatment herbicide to be matched with the stem leaf treatment herbicide to be jointly applied in the 1-2 leaf stage of the weeds, so that the soil treatment sealing effect can be achieved, the internal absorption contact killing effect of the stem leaf treatment can be achieved, and the overall control effect is excellent.
Detailed Description
The present invention is described in more detail below with reference to specific examples, but the present invention is not limited to the following examples.
Example 1
A herbicide composition containing pyraflufen-ethyl, pinoxaden and mefenpyr-diethyl is prepared from the following components in parts by weight: 20% of Sulfenpyrazazole, 10% of pinoxaden, 10% of mefenpyr-diethyl, 2.5% of agricultural emulsion 600#, 1% of sodium diisooctyl succinate sulfonate, 1.5% of sodium methylene dinaphthalene sulfonate, 3% of gelatin, 12% of ethylene glycol, 2% of lignin calcium carbonate and water, wherein the water is supplemented to 100%.
The suspending agent with the mass percentage of the active ingredients of 30 percent is prepared according to the conventional preparation method.
Example 2
A herbicide composition containing pyraflufen-ethyl, mesosulfuron and mefenpyr-diethyl is prepared from the following components in parts by weight: 20% of sulfonylpyraflufen-ethyl, 1% of mesosulfuron-methyl, 2% of mefenpyr-diethyl, 600# 3% of agricultural emulsion, 2% of sodium diisooctyl succinate sulfonate, 2.5% of sodium methylene dinaphthalene sulfonate, 2% of gelatin, 10% of ethylene glycol, 2.5% of lignin calcium carbonate and water, wherein the balance is up to 100%.
The suspending agent with the mass percentage of the active ingredients of 21 percent is prepared according to the conventional preparation method.
Example 3
A herbicide composition containing pyraflufen-ethyl, pinoxaden and mefenpyr-diethyl is prepared from the following components in parts by weight: 18% of Sulfenpyrazazole, 6% of pinoxaden, 12% of mefenpyr-diethyl, 5% of sodium methylene dinaphthalene sulfonate, 4% of fatty alcohol-polyoxyethylene ether, NP-710%, 5% of bentonite and methyl oleate, wherein the balance is up to 100%.
The oil suspending agent with the mass percentage of the effective component of 24 percent is prepared according to the conventional preparation method.
Example 4
A herbicide composition containing pyraflufen-ethyl, mesosulfuron and mefenpyr-diethyl is prepared from the following components in parts by weight: 45% of pyraflufen-ethyl, 1.5% of mesosulfuron-methyl, 3% of mefenpyr-diethyl, 6% of sodium methylene dinaphthalene sulfonate, 4% of fatty alcohol-polyoxyethylene ether, NP-712%, 6% of bentonite and methyl oleate, wherein the balance is up to 100%.
The oil suspending agent with the mass percentage of the effective component of 46.5 percent is prepared according to the conventional preparation method.
Application test 1: use of a herbicidal composition for controlling weeds:
firstly, weeding tests are carried out on the active ingredients of the sulfuryl pyraflufen and the pinoxaden and the active ingredients of the sulfuryl pyraflufen and the mesosulfuron under the greenhouse potting condition so as to evaluate the weeding effect of the two ingredients. The specific implementation is as follows.
Test agent solution: the technical products of the sulfonylpyraflufen and the pinoxaden are accurately weighed according to the using dosage of the table 1, the technical products of the sulfonylpyraflufen and the mesosulfuron are accurately weighed according to the using dosage of the table 2, the materials are dissolved by proper amount of acetone (the acetone can completely dissolve the active medicine), and then the dissolved materials are added into water solution containing 0.1 wt% of Tween 80 emulsifier and stirred evenly to prepare solution containing a certain active ingredient content. Blank control is solution treatment: an equivalent amount of acetone was added to an equivalent amount of 0.1% aqueous tween 80 emulsifier.
The test method comprises the following steps: the activity of the medicament on the Nissan maitake after single use and mixed use is detected by a Gowing method. A plastic pot with the height of 10cm and the diameter of 7cm is filled with a certain amount of soil, seeds of each weed to be tested are uniformly sown in the plastic pot, 20 seeds are sown in each plastic pot, the plastic pot is covered with soil with the thickness of 0.5, and the seeds are cultured in a greenhouse (20 ℃ in the day and 10 ℃ at night). After the seedlings of the weeds emerge regularly, the seedlings are fixed to 15 plants in each pot, and the greenhouse culture is continued. When the weeds grow to the 2-leaf stage, the prepared liquid medicine is subjected to stem and leaf spraying treatment, the specific treatment dosage is shown in tables 1 and 2, the solution treatment is used as a blank control, and the treatment is repeated for 4 times. The stem and leaf spray is sprayed by a 3WP-2000 model walking spray tower of Nanjing agricultural mechanization research institute of agriculture. After the treatment, the test material was placed in a greenhouse for further cultivation, the growth of weeds was periodically observed, the fresh weight of the aerial parts was weighed 21 days later, and the fresh weight inhibition (%) was calculated.
The mode of action of the herbicide combinations is evaluated according to the Gowing method, which has the following formula:
e (%) - (control group fresh weight-treatment group fresh weight)/control group fresh weight × 100
E 0 (％)＝X+Y×(100-X)/100
C＝E-E 0
In the formula, E 0 The herbicide is a theoretical prevention effect on weed inhibition after two active ingredients are mixed; e is the actual measurement control effect on weed inhibition after the two active ingredients are mixed; x is the control effect of the pyraflufen-ethyl on the target weeds under the dosage; y is the control effect of the mesosulfuron-methyl or pinoxaden on the target weeds under the dosage; c is the combined action coefficient of the mixed preparation and is used for evaluating the synergistic action of the two active ingredients; c is synergistic when it is greater than 10, antagonistic when it is less than 10, and additive when it is within + -10.
TABLE 1 crude test results of herbicidal activity of pyriftalid and pinoxaden on Nissan-Beauveria-gecko in different ratios
As can be seen from the data in table 1 above: after the sulphone pyraflufen and the pinoxaden are compounded, the prevention effect on the Nissan maitake is good, and after the two components are compounded, the obvious synergistic effect is achieved within a certain proportioning range (3:1-2: 1).
TABLE 2 biological test results of herbicidal activity of pyraflufen-ethyl and mesosulfuron-methyl on Nissan-Beech
As can be seen from the data in table 2 above: after the topramezone and the mesosulfuron-methyl are compounded, the prevention effect on the Nissan foxtail is good, and after the two components are compounded, the synergistic effect is obvious within a certain proportioning range (30:1-40: 3).
Application test 2: the herbicide composition provided by the invention is used for field efficacy test.
And (3) test crops: wheat (Zheng wheat 103).
Control target: physalis alkekengi (grassy weeds).
The test method comprises the following steps: the herbicide composition prepared by the invention is subjected to field efficacy test according to the pesticide field efficacy test rule. The test treatments and numbers are shown in Table 3. The area of the cell used in the test is 20m 2 The test is repeated for 4 times, the cultivation conditions (soil, fertility, growth stage and crop row spacing) of all test cells are uniform, and the test medicament and blank control cells are arranged in random block groups. The medicament soil fog treatment is carried out in the early post-emergence stage of wheat and at the 1-2 leaf stage of weeds. Investigating weed plant control effect and fresh weight control effect 60 days after pesticide application, grading phytotoxicity, and harvesting 10m in each plot 2 And (6) carrying out yield measurement. The statistical results are shown in tables 3 and 4.
Plant/fresh weight control (%) - (control zone weed plant/fresh weight-treatment zone weed plant/fresh weight)/control zone weed plant/fresh weight
Yield increase (%) - (treatment zone yield-control zone yield)/control yield
Wherein the grading standard of the safety of the herbicide composition to wheat is as follows:
grade 1, normal growth of crops and no damage symptom;
2 grade, the crops have slight phytotoxicity which is less than 10 percent;
grade 3, moderate phytotoxicity in crops can be recovered later;
4, the crops are seriously injured and difficult to recover;
grade 5, the crop phytotoxicity is severe and cannot be recovered.
TABLE 3 test numbering and treatment
TABLE 4 field control effect and safety of the herbicide composition
Note: the control effect in the table above is the average of 4 replicates; ab c indicates the significance of the difference at the level of p 0.05 between treatments
As can be seen from the test results of table 4: in field experiments, the control effect of different medicament treatments on the Japanese foxtail is better, the treatment effect (treatment 1-6) of different medicaments has no significant difference, but the control effect of the medicament treatments is significantly higher than that of artificial weeding. The treatments 2, 3,5 and 6 all cause phytotoxicity to wheat, and particularly, the phytotoxicity grade of the treatment 2 and the treatment 5 without adding a safener, namely pyraclofen-ethyl, reaches 3 grade, and the phytotoxicity is serious. Therefore, the herbicide composition has excellent control effect, and the herbicide composition has excellent safety by adding a certain proportion of the safener.
TABLE 5 Effect of different treatments on wheat yield
Note: ab c in the table above indicates the significance of the difference at the level of p 0.05 between treatments
As can be seen from the test results of table 5: in a field pesticide effect test, different medicament treatments have different yield increasing effects on wheat. Among them, treatments 1 and 4 (examples 1 and 2) had the best synergistic effect, and the yields were 12.18% and 11.40%, respectively. And the treatment 2 and the treatment 5 without adding the safener of the mefenpyr-diethyl cause the yield reduction of the wheat and serious phytotoxicity. Thus, the herbicide composition of the present invention has excellent safety.
Application test 3: the herbicide composition provided by the invention is used for field efficacy test.
Test crops: wheat (Zheng wheat 103).
Control target: resistant grassy weeds, myrtle.
The test method comprises the following steps: the herbicide composition prepared by the invention is subjected to field efficacy test according to the pesticide field efficacy test rule. The experimental treatments and dosages are shown in table 6. The area of the cell used in the test is 20m 2 Cultivation conditions (soil, water, etc.) for all test plots were repeated 4 times,Fertility, growth stage and crop row spacing) are uniform, and the cells are arranged in random blocks. The pesticide soil fog treatment is respectively carried out before wheat sowing, 3 days after wheat sowing before wheat seedling emergence and 1-2 leaf period of wheat seedling emergence weeds. The control effect of the weeds on the plants and the fresh weight control effect were investigated 120 days after the application of the herbicide, and the phytotoxicity was rated (the rating standard was the same as in example 6). The specific results are shown in Table 6.
TABLE 6 control of the Japanese foxtail and safety of wheat by different treatments
As can be seen from the test results of table 6: in the field efficacy test, the control effect and safety to wheat of resistant Nippon foxtail treated with the same agent were different. In the treatments 1-3 and 4-6, the same treatment dosage and different application periods are adopted, and the pesticide sprayed in the 1-2 leaf period of the weeds after emergence has the best control effect on the resistant myrtle. The control effect of the treatment 3 and the treatment 6 on the resistant Japanese physalis alkekengi is better than that of the control medicaments of the topramezone, pinoxaden, mesosulfuron and fenoxaprop-p-ethyl. Compared with the traditional herbicide, the herbicide composition provided by the invention has an excellent control effect, is applied in the 1-2 leaf stage of the post-emergence weeds, and has the most obvious application effect and the best safety.
Claims (4)
1. A herbicide composition containing pyraflufen-ethyl and pinoxaden, which is characterized by comprising a herbicidal active ingredient A, a herbicidal active ingredient B and a safe active ingredient C; the weeding active ingredient A is the sulpirfen-ethyl, the weeding active ingredient B is the pinoxaden, and the safe active ingredient C is the mefenpyr-diethyl; the mass ratio of the weeding active ingredient A to the weeding active ingredient B to the safe active ingredient C is 2-6: 1-2: 1-3.
2. The herbicidal composition comprising sulfuryl pyraflufen-ethyl and pinoxaden according to claim 1, characterized in that the herbicidal composition further comprises a pesticidally acceptable adjuvant; the auxiliary materials are selected from one or more than two of wetting agent, dispersant, filler, emulsifier, disintegrant, stabilizer, defoamer, thickener, antifreeze and solvent.
3. The herbicide composition containing pyraflufen-ethyl and pinoxaden as claimed in claim 2, wherein the total weight of the active ingredients A and B in the herbicide composition is 5-90% of the total weight of the herbicide composition.
4. Use of a herbicidal composition comprising xaflufen-ethyl and pinoxaden as claimed in any one of claims 1 to 3, characterized in that the safe and highly effective herbicidal composition is spray-treated in the early post-emergence stage of wheat and when the weeds are in the 1-2 leaf stage.
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| CN101562976A (en) * | 2006-12-21 | 2009-10-21 | 组合化学工业株式会社 | Herbicide composition |
| CN108041050A (en) * | 2017-12-15 | 2018-05-18 | 北京科发伟业农药技术中心 | Herbicidal combinations containing pinoxaden and benzene flumetsulam |
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| CN108719310A (en) * | 2018-05-16 | 2018-11-02 | 河南省农业科学院植物保护研究所 | A kind of herbicide synergistic combination of prevention wheatland Triticum tauschii |
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| CN101562976A (en) * | 2006-12-21 | 2009-10-21 | 组合化学工业株式会社 | Herbicide composition |
| CN103250708A (en) * | 2006-12-21 | 2013-08-21 | 组合化学工业株式会社 | Herbicidal composition |
| CN108041050A (en) * | 2017-12-15 | 2018-05-18 | 北京科发伟业农药技术中心 | Herbicidal combinations containing pinoxaden and benzene flumetsulam |
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