CN112293422A - Herbicide composition containing pyroxsulam and flufenacet - Google Patents
Herbicide composition containing pyroxsulam and flufenacet Download PDFInfo
- Publication number
- CN112293422A CN112293422A CN201910692552.6A CN201910692552A CN112293422A CN 112293422 A CN112293422 A CN 112293422A CN 201910692552 A CN201910692552 A CN 201910692552A CN 112293422 A CN112293422 A CN 112293422A
- Authority
- CN
- China
- Prior art keywords
- flufenacet
- pyroxsulam
- powder
- active ingredients
- composition according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000005531 Flufenacet Substances 0.000 title claims abstract description 81
- IANUJLZYFUDJIH-UHFFFAOYSA-N flufenacet Chemical compound C=1C=C(F)C=CC=1N(C(C)C)C(=O)COC1=NN=C(C(F)(F)F)S1 IANUJLZYFUDJIH-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 239000005607 Pyroxsulam Substances 0.000 title claims abstract description 69
- GLBLPMUBLHYFCW-UHFFFAOYSA-N n-(5,7-dimethoxy-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-2-methoxy-4-(trifluoromethyl)pyridine-3-sulfonamide Chemical compound N1=C2N=C(OC)C=C(OC)N2N=C1NS(=O)(=O)C1=C(OC)N=CC=C1C(F)(F)F GLBLPMUBLHYFCW-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000000203 mixture Substances 0.000 title claims abstract description 60
- 230000002363 herbicidal effect Effects 0.000 title claims description 17
- 239000004009 herbicide Substances 0.000 title description 9
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- 238000002360 preparation method Methods 0.000 claims description 25
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 6
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
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- QYDYPVFESGNLHU-UHFFFAOYSA-N elaidic acid methyl ester Natural products CCCCCCCCC=CCCCCCCCC(=O)OC QYDYPVFESGNLHU-UHFFFAOYSA-N 0.000 description 1
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- KZOJQMWTKJDSQJ-UHFFFAOYSA-M sodium;2,3-dibutylnaphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S([O-])(=O)=O)=C(CCCC)C(CCCC)=CC2=C1 KZOJQMWTKJDSQJ-UHFFFAOYSA-M 0.000 description 1
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- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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
- A01N43/82—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 three ring hetero atoms
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
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Abstract
The invention discloses a weeding composition containing pyroxsulam and flufenacet, which comprises active ingredients of the pyroxsulam and the flufenacet, and the balance of pesticide auxiliary ingredients, wherein the mass ratio of the active ingredients of the pyroxsulam to the flufenacet in the weeding composition is 1: 50-50: 1, the mass percentage of the sum of the pyroxsulam and the flufenacet in the weeding composition is 1-90%. The weeding composition can be prepared into one of dispersible oil suspending agent, wettable powder and water dispersible granules and is used for preventing and removing annual weeds in wheat fields.
Description
Technical Field
The invention relates to a herbicide composition containing pyroxsulam and flufenacet, which is used for preventing and treating annual weeds in wheat fields.
Background
Pyroxsulam is a triazolopyrimidine systemic herbicide and a branched chain amino acid synthesis inhibitor; the drug is absorbed from the leaf surface, the bud and the root and conducted to the meristem through the conduction of the phloem and the xylem; symptoms include stunting and chlorosis followed by necrosis and even death; the herbicide composition is mainly used for preventing and removing annual gramineous weeds and broadleaf weeds in the cereal field and has the characteristic of wide weed control spectrum.
Flufenacet (flufenacet) is an aryloxide systemic herbicide, belongs to unclassified cell division and cell growth inhibitors, and has a main target site for fatty acid metabolism; tolerance is primarily due to rapid detoxification of glutathione transferase; pre-or post-emergent early use, has systemic activity, is conducted and distributed by apoplast, and has meristem activity; is a broad-spectrum selective herbicide for preventing and killing gramineous weeds and broadleaf weeds.
The herbicide mixture has the advantages of wide weeding spectrum, improvement of actual effect, delay of weed drug resistance, time saving and labor saving. Through pesticide formula screening, the control effect can be effectively improved, the dosage is reduced, the cost is reduced, and the generation of drug resistance of diseases, insects and weeds is delayed, so that the method is an important means for agricultural comprehensive treatment. The inventor carries out intensive research on the formulas of pyroxsulam and flufenacet, finds that the mixing of the pyroxsulam and the flufenacet has a synergistic effect on annual weeds in wheat fields in a certain mixing proportion range, and further researches complete the invention.
Disclosure of Invention
The invention aims to solve the problems of drug resistance of a weeding preparation to farmland weeds and poor actual control effect in the prior art, and provides a weeding composition which has high efficiency, low toxicity, good quick action and long duration and is beneficial to comprehensive treatment of farmland weeds.
Another object of the present invention is to use the composition for controlling weeds in agricultural fields, particularly suitable for controlling annual weeds in wheat fields.
The technical scheme of the invention is as follows:
a weeding composition containing pyroxsulam and flufenacet comprises the effective components of the pyroxsulam and the flufenacet in a weight ratio of 1: 50-50: 1;
further, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1: 30-30: 1;
furthermore, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1: 20-20: 1;
furthermore, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1: 10-10: 1;
furthermore, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1: 3-10: 1;
furthermore, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1: 3-3: 1;
furthermore, the weeding composition comprises the effective components of pyroxsulam and flufenacet in a weight ratio of 1: 3-1: 1;
furthermore, when the weeding composition is used for preventing and removing broadleaf weeds in wheat fields, the weight ratio is 1: 3-1: 1;
further, the weeding composition comprises the effective components of pyroxsulam and flufenacet in a weight ratio of 1: 2-3: 1;
furthermore, when the weeding composition is used for preventing and removing gramineous weeds in the wheat field, the weight ratio is 1: 2-3: 1;
further, the weight ratio of pyroxsulam to flufenacet is as follows: 1:30, 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1, 20:1, 30: 1;
furthermore, the weight ratio of pyroxsulam to flufenacet is as follows: 1:5, 1:3, 1:2, 1:1, 2:1, 3: 1;
furthermore, the weight ratio of the active ingredients of the weeding composition to the flufenacet is 1:2 or 1: 1;
furthermore, when the weeding composition is used for preventing and killing broadleaf weeds in wheat fields, the weight ratio is 1: 2;
furthermore, when the weeding composition is used for preventing and killing gramineous weeds in the wheat field, the weight ratio is 1: 1;
the total weight of the active ingredients of the weeding composition accounts for 1-90 percent of the total weight of the composition, and preferably 10-50 percent.
The invention provides a weeding composition containing pyroxsulam and flufenacet, which can be prepared into a preparation formulation acceptable in pesticide according to a method known by a person skilled in the art, and the preparation formulation comprises a solid preparation and a liquid preparation;
further, the solid preparation is powder, dispersible tablets, granules, soluble powder, soluble granules, soluble tablets, milk powder, milk granules, water dispersible granules, wettable powder, micro-capsule granules, powder, macro-granules and water dispersible tablets;
further, the liquid preparation is microcapsule suspending agent, dispersible agent, missible oil, emulsion granules, oil emulsion, emulsion powder, aqueous emulsion, microemulsion, dispersible oil suspending agent, oil dispersion powder, suspending agent, suspoemulsion, soluble agent and ultra-low volume liquid;
furthermore, the preferable preparation formulation of the preparation is suspending agent, wettable powder, dispersible oil suspending agent and water dispersible granule;
further, the suspending agents may use as auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; the carrier is deionized water;
further, as the wettable powder, there can be used: dispersing agents such as one or more of polycarboxylate, lignosulfonate, polyoxyethylene polyoxypropylene ether block copolymer, alkyl naphthalene formaldehyde condensate sulfonate, alkylphenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether sulfonate and the like; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, alkyl naphthalene sulfonates, and the like; fillers such as one or more of ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like;
further, the dispersible oil suspension can use the following auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; dispersing medium such as one or more of soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel oil, engine oil, mineral oil, etc.;
further, the water dispersible granule may use the following additives: dispersants such as one or more of polycarboxylates (TERSPERSE 2700, T36, GY-D06, etc.), lignosulfonates, alkylnaphthalene sulfonates, and the like; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, and the like; disintegrating agent such as one or more of ammonium sulfate, sodium sulfate, polyvinylpyrrolidone, starch or its derivatives, bentonite, etc.; binder such as one or more of starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethylcellulose, sucrose, etc.; filler such as one or more of diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like;
further, the composition is a suspending agent, and the suspending agent preferably comprises the following components in percentage by weight: 0.1-100 parts of pyroxsulam, 0.1-100 parts of flufenacet, 1-15 parts of a dispersing agent, 0.5-20 parts of an emulsifying agent, 1-10 parts of a wetting agent, 1-10 parts of a thickening agent, 0-10 parts of an antifreezing agent and the balance of deionized water;
further, the composition is a wettable powder, and the wettable powder preferably comprises the following components in percentage by weight: 0.1-100 parts of pyroxsulam, 0.1-100 parts of flufenacet, 1-20 parts of a dispersing agent, 1-15 parts of a wetting agent and the balance of a filler;
further, the composition is a dispersible oil suspending agent, and the dispersible oil suspending agent preferably comprises the following components in percentage by weight: 0.1-100 parts of pyroxsulam, 0.1-100 parts of flufenacet, 1-15 parts of a dispersing agent, 0.5-20 parts of an emulsifying agent, 1-10 parts of a wetting agent, 1-10 parts of a thickening agent, 0-10 parts of an antifreezing agent and the balance of a dispersion medium;
further, the composition is a water dispersible granule, and the water dispersible granule preferably comprises the following components in percentage by weight: 0.1-100 parts of pyroxsulam, 0.1-100 parts of flufenacet, 1-15 parts of a dispersing agent, 1-10 parts of a wetting agent, 1-15 parts of a disintegrating agent, 1-10 parts of a binder and the balance of a filler.
The invention has reasonable components, good weeding effect and low drug cost, and the activity and the weeding effect of the invention are not simple superposition of the activities of the components, but have obvious synergistic action, can expand the weed control spectrum, delay resistance, have good safety to crops and meet the safety requirement of pesticide preparations.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The following described examples are only preferred embodiments of the present invention, which can be used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Preparation examples of formulations
Example 1: 30% pyroxsulam flufenacet suspension (2:1)
The formula is as follows: 20% pyroxsulam, 10% flufenacet, 2% sodium alkyl sulfate, 3% alkylphenol formaldehyde resin polyoxyethylene ether, 0.4% carboxymethyl cellulose, 5% propylene glycol, 0.2% isothiazolinone and deionized water to make up the balance;
the preparation method comprises the following steps: according to the formula proportion, the active ingredients of pyroxsulam, flufenacet, surfactant and other functional additives are sequentially placed in a reaction kettle, water is added for uniform mixing, and the product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration.
Example 2 25% Sulfamethoxazole suspension (4:1)
The formula is as follows: 20% pyroxsulam, 5% flufenacet, 10% dodecyl polyoxyethylene ether phosphate, 2% sodium alkyl polyoxyethylene ether sulfonate, 0.4% magnesium aluminum silicate, 0.2% carboxyethyl cellulose, 4% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil and deionized water to make up the balance;
the preparation method comprises the following steps: the same as in example 1.
Example 3: 15% pyroxsulam flufenacet suspension (1:2)
The formula is as follows: 5% pyroxsulam, 10% flufenacet, 8% dodecyl polyoxyethylene ether phosphate, 2% sodium alkyl polyoxyethylene ether sulfonate, 0.4% xanthan gum, 0.1% carboxyethyl cellulose, 4% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil and deionized water to make up the balance;
the preparation method comprises the following steps: the same as in example 1.
Example 4: 30% pyridylsulfonamide-flufenacet wettable powder (1:2)
The formula is as follows: 10% pyroxsulam, 20% flufenacet, 5% calcium alkylnaphthalene formaldehyde condensate sulfonate, 6% sodium alkylphenol polyoxyethylene ether sulfonate, 3% sodium alkylnaphthalene sulfonate, 5% talcum powder and diatomite, and the balance of the mixture;
the preparation method comprises the following steps: according to the formula proportion of the embodiment, the active ingredients of pyroxsulam and flufenacet are added into a carrier, and a surfactant and other functional additives are added into the carrier, mixed, subjected to air flow crushing and then mixed to prepare the wettable powder.
Example 5: 30% pyridylsulfonamide-flufenacet wettable powder (2:1)
The formula is as follows: 20% pyroxsulam, 10% flufenacet, 4% sodium lignosulfonate, 5% fatty alcohol-polyoxyethylene ether phosphate, 4% sodium polycarboxylate, 3% sodium alkyl sulfate, 3% white carbon black and talcum powder for balancing;
the preparation method comprises the following steps: the same as in example 4.
Example 6: 20% pyridylsulfonamide-flufenacet wettable powder (2:3)
The formula is as follows: 8 percent of pyroxsulam, 12 percent of flufenacet, 4 percent of calcium alkyl naphthalene formaldehyde condensate sulfonate, 5 percent of sodium alkylphenol polyoxyethylene ether sulfonate, 2 percent of sodium alkyl naphthalene sulfonate, 5 percent of talcum powder and kaolin, and the balance being made up;
the preparation method comprises the following steps: the same as in example 4.
Example 7: 20% pyroxsulam flufenacet dispersible oil suspending agent (1:1)
The formula is as follows: 10% pyroxsulam, 10% flufenacet, 2% sodium polycarboxylate, 4% nanoemulsion 1601#, 3% tween-60 #, 4% microemulsion 2201, 1% sodium alkyl sulfate, 0.5% bentonite, 5% propylene glycol and soybean oil for supplementing the balance;
the preparation method comprises the following steps: according to the formula proportion, the active ingredients of pyroxsulam, flufenacet, surfactant and other functional additives are sequentially placed in a reaction kettle, oil is added and mixed uniformly, and the product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration.
Example 8: 15% pyroxsulam flufenacet dispersible oil suspending agent (1:4)
The formula is as follows: 3% pyroxsulam, 12% flufenacet, 2% sodium lignosulfonate, 5% span-60 #, 5% farm milk 700#, 4% sodium naphthalene sulfonate, 1% magnesium aluminum silicate, 4% glycerol and rapeseed oil;
the preparation method comprises the following steps: the same as in example 8.
Example 9: 30% pyroxsulam flufenacet water dispersible granule (5:1)
The formula is as follows: 25% of pyroxsulam, 5% of flufenacet, 3% of polycarboxylate GY-D06, 4% of sodium dodecyl sulfate, 1% of sodium alkyl sulfonate, 2% of cane sugar and argil to make up the balance;
the preparation method comprises the following steps: adding the active ingredients of pyroxsulam and flufenacet into a carrier according to the formula proportion of the embodiment, adding a surfactant and other functional auxiliaries, mixing, carrying out jet milling, adding 25% of water, kneading, granulating, drying and screening to obtain the water dispersible granule product.
Example 10: 15% pyroxsulam flufenacet water dispersible granule (2:1)
The formula is as follows: 10% pyroxsulam, 5% flufenacet, 3% polycarboxylate T36, 4% sodium dodecyl sulfate, 1% sodium alkyl sulfonate, 2% glucose and talcum powder to make up the balance;
the preparation method comprises the following steps: the same as in example 9.
Example 11: 40% pyroxsulam flufenacet water dispersible granule (1:3)
The formula is as follows: 10% pyroxsulam, 30% flufenacet, 4% sodium alkylnaphthalene sulfonate, 3% sodium lignosulfonate, 2% sodium dibutylnaphthalene sulfonate, 2% sodium naphthalene sulfonate, 4% sodium carboxymethylcellulose, 5% sodium sulfate and white carbon black to make up the balance;
the preparation method comprises the following steps: the same as in example 9.
Indoor activity test
Example 15: the test basis is as follows: NY/T1155.4-2006 "indoor bioassay Standard for pesticides herbicide part 4: activity measurement test Stem and leaf spray method.
Test targets of descurainia sophia [ Descumaria sophia (L.) ] Webb.Ex Prantl ] and Alopecurus amurensis aqualis Sobol
Reagent to be tested: 96.5 percent of pyroxsulam technical and 98 percent of flufenacet technical are provided by research and development centers of Hill pharmaceutical industry group GmbH.
Preparation of the medicament: dissolving the raw materials with dimethylformamide, diluting with 0.1% Tween 80 water solution, and preparing into 5 series of mass concentrations according to equal ratio method.
The test method comprises the following steps: respectively sowing the quantified grass seeds in pots with the diameter of 9cm, culturing in a light incubator, and performing spray treatment on 20 plants per pot when weeds grow to the 1-3 leaf stage. The cultivation is continued in the greenhouse after the treatment, the weed control effect of each treatment is regularly observed, and the fresh weight of each treated weed is recorded after 14 days.
And (3) test treatment: repeat for 4 times in each treatment setting, and set clear water as a control.
Data investigation: calculating fresh weight control effect of each treatment 21 days after spray treatment, and obtaining EC of each treatment through linear regression analysis between the probability value and concentration logarithm value of control effect50Value, calculate co-toxicity coefficient by Sun Yunpei method.
The calculation formula is as follows:
fresh weight control effect (fresh weight in control area-fresh weight in treatment area) x 100/fresh weight in control area
Measured toxicity index (ATI) ═ standard medicament EC50X 100/test agent EC50
The Toxicity Index (TTI) of the mixed agent is A agent, the toxicity index of A agent, the percentage content of A agent, the toxicity index of B agent and the percentage content of B agent
Co-toxicity coefficient (CTC) of the mixture (measured virulence index of the mixture/theoretical virulence index of the mixture) × 100
CTC is less than or equal to 80, and the antagonism is shown; 80 < CTC < 120, showing additive effect; CTC is more than or equal to 120, and the effect is synergistic.
The results of the tests are given in the following table:
table 1: test for combined action of pyroxsulam and flufenacet on descurainia sophia
Table 2: test for combined action of pyroxsulam and flufenacet in mixing mode on physalis pubescens
As shown in the indoor activity tests (shown in tables 1 and 2), the pyroxsulam and the flufenacet are mixed to prevent and control common weeds in wheat fields, namely the descurainia sophia and the physalis pubescens, and have good indoor activity. When the mass ratio of pyroxsulam to flufenacet is 1: 50-50: 1, the CTC of the descurainia sophia and the physalis pubescens is more than 80, and an additive or synergistic effect is shown; when the mass ratio of pyroxsulam to flufenacet is 1: 30-30: 1, the indoor activity CTC of the descurainia sophia is more than 120, and the synergistic effect is shown; when the mass ratio of pyroxsulam to flufenacet is 1: 10-10: 1, the indoor activity CTC of the descurainia sophia is more than 150, and an obvious synergistic effect is shown; when the mass ratio of pyroxsulam to flufenacet is 1: 5-1: 1, the indoor activity CTC of the descurainia sophia is more than 200, and the synergistic effect is obvious; when the mass ratio of pyroxsulam to flufenacet is 1:2, the indoor activity CTC of the descurainia sophia is greater than 264.76, and the synergistic effect is shown; when the mass ratio of pyroxsulam to flufenacet is 1: 20-20: 1, the indoor activity CTC of the alopecurus as a result is greater than 120, and a synergistic effect is achieved; when the mass ratio of pyroxsulam to flufenacet is 1: 3-10: 1, the indoor activity CTC of the alopecurus maiden is more than 150, and an obvious synergistic effect is shown; when the mass ratio of pyroxsulam to flufenacet is 1: 1-3: 1, the indoor activity CTC of the alopecurus maiden is more than 200, and the effect of obvious synergism is shown; when the mass ratio of pyroxsulam to flufenacet is 1:1, the indoor activity CTC of the alopecurus maiden is greater than 253.64, and the synergistic effect is shown; the preferred mass ratio of pyroxsulam to flufenacet is 1:30, 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1, 20:1, 30: 1; further, the mass ratio is preferably 1:5, 1:3, 1:2, 1:1, 2:1, 3: 1; still more preferably 1:2 or 1: 1.
Example 16: the pyroxsulam and the flufenacet are mixed to prevent and control the weed field effect in the wheat field.
Reagent to be tested: 20 percent of pyroxsulam flufenacet dispersible oil suspending agent (1:1), 10 percent of pyroxsulam wettable powder and 30 g/L of flufenacet dispersible oil suspending agent.
Test work: wheat (tainong 18).
And (3) experimental design: the test was run for a total of 6 treatments and a clear water control, repeated 4 times per treatment, and 20 square meters per repetition.
The application method comprises the following steps: spraying stem and leaf, mixing the medicinal liquid according to the experimental design, and uniformly spraying on wheat and weeds by using a knapsack high-pressure sprayer.
The investigation method comprises the following steps: and (3) pesticide effect investigation, namely, an absolute value investigation method is adopted, wherein 4 points are randomly selected in each cell, each point is 0.25 square meter, the variety, the plant number and the fresh weight of the residual weeds in 1 square meter are counted, and the plant number control effect and the fresh weight control effect are respectively calculated.
The number of plants is equal to (%) (number of weed plants in the blank control area-number of weed plants in the treatment area) ÷ number of weed plants in the blank control area × 100
Fresh weight control effect (%) - (fresh weight of weeds in blank control area-fresh weight of weeds in treated area) ÷ fresh weight of weeds in blank control area x 100
Crop safety survey: and (3) observing and recording the leaf color, the growth phase and the growth vigor of the crops while investigating the pesticide effect, and determining the safety of the pesticide to the crops.
The test results are shown in table 3:
TABLE 3 Pyrithiobac-sodium and flufenacet mixed to control weeds in wheat field (40 days)
The test results show (see table 3): the mixture of the pyroxsulam and the flufenacet has good control effect on annual weeds in wheat fields, when the dosage of the preparation of the 20 percent of the pyroxsulam-flufenacet dispersible oil suspending agent is 20 g/mu, 30 g/mu, 40 g/mu and 50 g/mu, the plant control effect is 87.3 percent, 90.3 percent, 93.3 percent and 95.6 percent, and the fresh weight control effect is 87.5 percent, 90.4 percent, 93.4 percent and 95.6 percent.
In the test process, the composition is safe to the winter wheat under the test dosage, and the phenomenon of abnormal development of the winter wheat is not found.
As can be seen from indoor activity tests and field efficacy tests, the weeding composition provided by the invention has the following beneficial effects: 1. the weeding composition provided by the invention shows an obvious synergistic effect in a certain proportioning range, the control effect of the composition is obviously improved compared with that of a single agent, the using dosage of pesticide is reduced, the using times of the pesticide are reduced, the using cost is reduced, and the adverse effect of the pesticide on the ecological environment is reduced. 2. The weeding composition provided by the invention has the advantages that the combination of the two effective components expands the weeding spectrum, the weed problem can be solved by using the weeding composition once, and the defects and limitations of single-agent use are overcome. 3. The weeding composition provided by the invention has the advantages of quick effect exertion, long lasting period, low use cost, convenience in use, time and labor saving, and great economic and social benefits in popularization and application.
Claims (10)
1. A weeding composition containing pyroxsulam and flufenacet is characterized in that: the mass ratio of the pyroxsulam to the flufenacet serving as active ingredients is 1: 50-50: 1.
2. A herbicidal composition according to claim 1, characterized in that the mass ratio of the active ingredients pyroxsulam and flufenacet is 1:30 to 30: 1.
3. The weeding composition according to claim 1, wherein the mass ratio of the active ingredients pyroxsulam to flufenacet is 1: 20-20: 1, and preferably 1: 10-10: 1.
4. The weeding composition according to claim 1, wherein the mass ratio of the active ingredients pyroxsulam to flufenacet is 1: 3-10: 1, and preferably 1: 3-3: 1.
5. A herbicidal composition according to claim 1, characterized in that the mass ratio of the active ingredients pyroxsulam and flufenacet is 1:2 or 1: 1.
6. A herbicidal composition according to claim 1, characterized in that the sum of the active ingredients pyroxsulam and flufenacet is between 1% and 90%, preferably between 10% and 50% by weight of the composition.
7. A herbicidal composition according to claim 1, wherein the herbicidal composition is in the form of any one of a powder, a dispersible tablet, a granule, a soluble powder, a soluble granule, a soluble tablet, a emulsifiable powder, an emulsifiable granule, a water dispersible granule, a wettable powder, a microencapsulated granule, a powder, a macrogranule, a water dispersible tablet, a microencapsulated suspension, a dispersible solution, an emulsifiable concentrate, an emulsifiable granule, an oil emulsion, an emulsifiable powder, an aqueous emulsion, a microemulsion, a dispersible oil suspension, an oil dispersible powder, a suspension, a suspoemulsion, a soluble solution, an ultra-low volume liquid; the preferable preparation formulation is any one of missible oil, wettable powder, water dispersible granules, suspending agent and dispersible oil suspending agent.
8. Use of the herbicidal composition according to any one of claims 1 to 7 for controlling unwanted vegetation.
9. Use of the herbicidal composition according to claim 8 for controlling unwanted vegetation, characterized in that the locus of the unwanted vegetation is a wheat field; preferably, the unwanted vegetation is a grass and/or broadleaf weed; preferably, the gramineous weeds are one or more of alopecurus, bluegrass and barnyard grass, and the broadleaf weeds are one or more of descurainia, speedwell and cleavers.
10. A method for controlling unwanted plants, characterized in that the herbicidal composition containing pyroxsulam and flufenacet according to any one of claims 1 to 7 is applied to the growing locus and/or the leaves and/or the stems of the unwanted plants; preferably, the locus of the undesired plants is a wheat field; preferably, the unwanted vegetation is a grass and/or broadleaf weed; preferably, the gramineous weeds are one or more of alopecurus, bluegrass and barnyard grass, and the broadleaf weeds are one or more of descurainia, speedwell and cleavers.
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|---|---|---|---|---|
| CN1761395A (en) * | 2003-03-13 | 2006-04-19 | 巴斯福股份公司 | Synergistically acting herbicidal mixtures |
| CN105613552A (en) * | 2016-03-15 | 2016-06-01 | 山东省农业科学院植物保护研究所 | Herbicide composition containing pyroxsulam and hingosulfuron-methyl |
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2019
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761395A (en) * | 2003-03-13 | 2006-04-19 | 巴斯福股份公司 | Synergistically acting herbicidal mixtures |
| CN105613552A (en) * | 2016-03-15 | 2016-06-01 | 山东省农业科学院植物保护研究所 | Herbicide composition containing pyroxsulam and hingosulfuron-methyl |
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