CN112273387A - Weeding composition containing diflufenican and 2-methyl-4-chloro-sodium - Google Patents
Weeding composition containing diflufenican and 2-methyl-4-chloro-sodium Download PDFInfo
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- CN112273387A CN112273387A CN201910663508.2A CN201910663508A CN112273387A CN 112273387 A CN112273387 A CN 112273387A CN 201910663508 A CN201910663508 A CN 201910663508A CN 112273387 A CN112273387 A CN 112273387A
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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
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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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
- A01N39/00—Biocides, pest repellants or attractants, or plant growth regulators containing aryloxy- or arylthio-aliphatic or cycloaliphatic compounds, containing the group or, e.g. phenoxyethylamine, phenylthio-acetonitrile, phenoxyacetone
- A01N39/02—Aryloxy-carboxylic acids; Derivatives thereof
- A01N39/04—Aryloxy-acetic acids; Derivatives thereof
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Abstract
The invention discloses a weeding composition containing diflufenican and 2-methyl-4-sodium chloride and application thereof, wherein the effective active ingredients comprise diflufenican and 2-methyl-4-sodium chloride, and the mass ratio of the diflufenican to the 2-methyl-4-sodium chloride is 1:50-50: 1. The composition can be prepared into agriculturally allowable formulations, and preferably missible oil, wettable powder, water dispersible granules, suspending agents and dispersible oil suspending agents. The invention has reasonable components, good weeding effect in wheat field, and the activity and weeding effect are not the simple superposition of the activities of the components, compared with the existing single preparation or binary compound preparation, the invention has the advantages of obvious weeding effect, reduced dosage, enlarged weed control spectrum and good safety to crops.
Description
Technical Field
The invention relates to a weeding composition, in particular to a weeding composition containing diflufenican and 2-methyl-4-chloro-sodium, belonging to the technical field of pesticide compounding.
Background
Diflufenican (diflufenican) chemical name: 2, 4-difluoro-2- (alpha, alpha-trifluoro-m-tolyloxy) nicotinanilide with CAS number 83164-33-4 and molecular formula C19H11F5N2O 2. Diflufenican is a picolinate herbicide, and blocks the biosynthesis of carotenoids by inhibiting phytoene dehydrogenase; is a selective contact and residual herbicide, is mainly absorbed by tender shoots, and has limited conductivity; the death speed is related to the intensity of light, the light intensity is high, and the light intensity is low; is suitable for preventing and killing various broad-leaved weeds and gramineous weeds in barley and wheat fields, such as speedwell, cleavers, polygonum convolvulus, purslane, black nightshade, chickweed, vetch, bindweed, weasel, polygonum cuspidatum, polygonum salsifolia, amaranthus retroflexus, dayflower, elsholtzia, Thalassia, vetch, descurainia sophia and Convolvulus.
Chemical name of 2-methyl-4-chloro-sodium (MCPA-Na): sodium (4-chloro-2-methylphenoxy) acetate, CAS number: 94-74-6 has the molecular formula: c9H8ClNaO3.2, the sodium chloride-4-methyl is a phenoxy carboxylic acid herbicide and is a synthetic auxin; selective, systemic, hormonal herbicides, absorbed and conducted through the leaves and roots; concentrating on meristematic regions to inhibit growth; post-emergence control of annual grassy weeds and perennial broadleaf weeds in areas such as cereals, forage seed crops, flax, rice, grapes, peas, potatoes, asparagus, grasslands, lawns, fruit trees, and roadside and dikes.
The herbicide variety containing a single active component has defects of different degrees in weed control, and after continuous use, weeds are easy to generate drug resistance, so that the problems of narrow weed control spectrum, environmental pollution and the like occur. The reasonable compounding of the herbicide is an effective method for improving the preventing and killing effect, expanding the weed control spectrum, delaying the drug resistance of weeds, reducing the environmental pollution, reducing the use cost and reducing the herbicide residue. The applicant unexpectedly finds that the diflufenican and the 2-methyl-4-sodium chloride which have different action mechanisms are mixed, so that the synergistic control effect on various broad-leaved weeds such as speedwell, cleavers and cardamine and gramineous weeds such as poa annua, alopecurus canadensis and barnyard grass is obvious, the control effect on the broad-leaved weeds and the gramineous weeds in wheat fields is obviously improved, the weed control spectrum is expanded, the dosage is reduced, the control cost is reduced, and the safety on crops is improved. And the search shows that the blending of diflufenican and 2-methyl-4-sodium chloride is not reported.
Disclosure of Invention
The invention aims to provide a weeding composition containing diflufenican and 2-methyl-4-chloro-sodium, which has the advantages of reasonable components, low medication cost, obvious synergistic effect, good weeding effect, wide weed control spectrum and safety to crops.
Another object of the invention is to provide a formulation of a herbicidal composition containing diflufenican and 2-methyl-4-chloro-sodium.
It is still another object of the present invention to provide the use of the above composition for controlling grassy and broadleaf weeds in wheat fields.
The technical scheme of the invention is as follows:
a weeding composition containing diflufenican and 2-methyl-4-sodium chloride comprises the effective components of diflufenican and 2-methyl-4-sodium chloride in a weight ratio of 1:50-50: 1;
furthermore, the weight ratio of the active ingredients diflufenican to 2-methyl-4-chloro-sodium is 1:30-20: 1;
furthermore, the weight ratio of the active ingredients diflufenican to 2-methyl-4-sodium chloride of the weeding composition is 1:5-3: 1;
furthermore, the weight ratio of the active ingredients diflufenican to 2-methyl-4-sodium chloride of the weeding composition is 1:2-2: 1;
further, the weight ratio of diflufenican to 2-methyl-4-sodium chloride 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, or 20: 1;
further, the weight ratio of diflufenican to 2-methyl-4-sodium chloride is as follows: 1:2, 1:1, 2: 1.
The total weight of the active ingredients of the weeding composition accounts for 1-80 percent of the total weight of the composition, and preferably 10-50 percent.
The invention provides a weeding composition containing diflufenican and 2-methyl-4-sodium chloride, which can be prepared into agriculturally acceptable preparation formulations including solid preparations and liquid preparations according to a method known by technical personnel in the technical field;
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 missible oil, wettable powder, water dispersible granules, suspending agent and dispersible oil suspending agent;
further, the emulsifiable concentrates may use as auxiliaries: emulsifiers such as fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, castor oil ethylene oxide adduct and its derivatives, polyoxyethylene polyoxypropylene block copolymer, calcium dodecylbenzenesulfonate; solvent such as one or more of trimethylbenzene, methyl oleate, N-dimethyl decanamide, dimethyl sulfoxide and propylene carbonate.
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 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 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, 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 composition is missible oil, and the missible oil preferably comprises the following components in percentage by weight: 0.1-100 parts of diflufenican, 0.1-100 parts of 2-methyl-4-chloro sodium, 0.1-20 parts of emulsifier and the balance of solvent;
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 diflufenican, 0.1-100 parts of 2-methyl-4-sodium chloride, 1-20 parts of dispersing agent, 1-15 parts of wetting agent and the balance of filler;
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 diflufenican, 0.1-100 parts of 2-methyl-4-sodium chloride, 1-15 parts of dispersing agent, 0.5-20 parts of emulsifying agent, 1-10 parts of wetting agent, 1-10 parts of thickening agent, 0-10 parts of antifreezing agent and the balance of deionized water;
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 diflufenican, 0.1-100 parts of 2-methyl-4-chloro-sodium, 1-15 parts of dispersing agent, 0.5-20 parts of emulsifying agent, 1-10 parts of wetting agent, 1-10 parts of thickening agent, 0-10 parts of antifreezing agent and the balance of dispersing medium;
the invention also discloses the use of the herbicidal composition as described above for combating unwanted vegetation;
further, the growing place of the unwanted plants is a wheat field;
further, the unwanted vegetation is grasses and/or broadleaf weeds;
still further, the grassy weeds are one or more of alopecurus, bluegrass and barnyard grass, and the broadleaf weeds are one or more of cardamine hirsute, cleavers and speedwell.
The invention also discloses a method for controlling unwanted plants, which comprises the step of applying the herbicidal composition containing diflufenican and 2-methyl-4-chloro-sodium to the growing sites and/or leaves and/or stems of the unwanted plants; preferably, the locus of the unwanted 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 cardamine hirsute, cleavers and speedwell.
The invention has the beneficial effects that:
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. The invention has good control effect on broad-leaved weeds and gramineous weeds in wheat fields, such as veronica officinalis, cleavers, cardamine hirsuta, alopecurus nobilis, barnyard grass and the like.
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
In order to better illustrate the invention, the following examples are given to further illustrate the invention, wherein the percentages in the formulation are by weight.
Example 1: 30% diflufenican-2-methyl-4-chloro sodium missible oil (1:1)
The formula comprises 15 percent of diflufenican, 15 percent of 2-methyl-4-sodium chloride, 30 percent of dimethyl sulfoxide, 5 percent of fatty alcohol-polyoxyethylene ether, 9 percent of alkylphenol polyoxyethylene polyoxypropylene ether, 1 percent of calcium dodecyl benzene sulfonate and methyl oleate which are complemented;
the preparation method comprises the following steps: adding diflufenican and 2-methyl-4-sodium chloride into a carrier according to the proportion of the formula of the embodiment, adding a surfactant and other functional auxiliaries, and uniformly stirring and mixing in a stirring and mixing kettle to obtain the emulsifiable concentrate.
Example 2: 33% diflufenican-2-methyl-4-chloro sodium missible oil (10:1)
The formula is as follows: 30% diflufenican, 3% 2-methyl-4-chloro sodium, 10% N, N-dimethyl capramide, 2% castor oil, 3% calcium dodecyl benzene sulfonate and trimethylbenzene to make up the balance;
the preparation method comprises the following steps: the same as in example 1.
Example 3: 22% diflufenican-2-methyl-4-chloro sodium missible oil (1:10)
The formula is as follows: 2% diflufenican, 22% 2 methyl 4 sodium chloride, 10% N, N-dimethylcapramide, 10% dimethyl sulfoxide, 10% propylene carbonate, 5% fatty alcohol-polyoxyethylene ether, 12% castor oil, 3% calcium dodecylbenzene sulfonate and trimethylbenzene, and the balance is made up;
the preparation method comprises the following steps: the same as in example 1.
Example 4: 30% diflufenican-2-methyl-4-chloro sodium wettable powder (1:1)
The formula is as follows: 15% diflufenican, 15% 2-methyl-4-sodium chloride, 5% calcium alkyl naphthalene formaldehyde condensate sulfonate, 6% sodium alkyl phenol polyoxyethylene ether sulfonate, 3% sodium alkyl naphthalene sulfonate, 5% talcum powder and diatomite for balancing;
the preparation method comprises the following steps: the preparation method comprises the following steps: according to the formula proportion of the embodiment, the active ingredients diflufenican and 2-methyl-4-chloro-sodium 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% diflufenican-2-methyl-4-chloro sodium wettable powder (2:1)
The formula is as follows: 20% diflufenican, 10% 2-methyl-4-sodium chloride, 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% diflufenican-2-methyl-4-chloro sodium wettable powder (2:3)
The formula is as follows: 8% of diflufenican, 12% of 2-methyl-4-sodium chloride, 4% of calcium alkyl naphthalene formaldehyde condensate sulfonate, 5% of sodium alkylphenol polyoxyethylene ether sulfonate, 2% of sodium alkyl naphthalene sulfonate, 5% of talcum powder and kaolin for balancing;
the preparation method comprises the following steps: the same as in example 4.
Example 7: 30% diflufenican-2-methyl-4-sodium chloride water dispersible granule (5:1)
The formula is as follows: 25% of diflufenican, 5% of 2-methyl-4-sodium chloride, 3% of polycarboxylate GY-D06, 4% of sodium dodecyl sulfate, 1% of sodium alkyl sulfonate, 2% of cane sugar and the balance of argil;
the preparation method comprises the following steps: according to the formula proportion of the embodiment, the active ingredients diflufenican and 2-methyl-4-chloro-sodium are added into a carrier, a surfactant and other functional auxiliaries are added into the carrier, the carrier and the surfactant are mixed, 10-25% of water is added after the air flow crushing, and then the water dispersible granule product is prepared through kneading, granulating, drying and screening.
Example 8: 15% diflufenican-2-methyl-4-sodium chloride water dispersible granule (2:1)
The formula is as follows: 10% diflufenican, 5% 2-methyl-4-chloro sodium, 3% polycarboxylate T36, 4% sodium dodecyl sulfate, 1% sodium alkyl sulfonate, 2% glucose and talcum powder, and the balance is made up;
the preparation method comprises the following steps: the same as in example 7.
Example 9: 40% diflufenican-2-methyl-4-sodium chloride water dispersible granule (1:3)
The formula is as follows: 10% diflufenican, 30% 2-methyl-4-sodium chloride, 4% sodium alkyl naphthalene sulfonate, 3% sodium lignin sulfonate, 2% sodium dibutyl naphthalene sulfonate, 2% sodium naphthalene sulfonate, 4% sodium carboxymethylcellulose, 5% sodium sulfate and white carbon black;
the preparation method comprises the following steps: the same as in example 7.
Example 10: 30% diflufenican-2-methyl-4-chloro-sodium suspending agent (3:2)
The formula is as follows: 15% diflufenican, 10% 2-methyl-4-sodium chloride, 2% sodium alkyl sulfate, 3% alkylphenol formaldehyde resin polyoxyethylene ether, 0.4% carboxymethyl cellulose, 5% propylene glycol, 0.2% isothiazolinone deionized water to make up the balance;
the preparation method comprises the following steps: according to the formula proportion, the active ingredients of diflufenican, 2-methyl-4-sodium chloride, surfactant and other functional additives are sequentially placed in a reaction kettle, water is added for uniform mixing, and the suspending agent product is obtained through high-speed shearing, wet sanding and finally homogeneous filtering
Example 11 20% diflufenican-2-methyl-4-chloro sodium suspension (1:4)
The formula is as follows: 5% diflufenican, 20% 2-methyl-4-sodium chloride, 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 10.
Example 12: 15% diflufenican-2-methyl-4-chloro-sodium suspending agent (1:2)
The formula is as follows: 5% diflufenican, 10% 2-methyl-4-sodium chloride, 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 10.
Example 13: 20% diflufenican-2-methyl-4-chloro sodium dispersible oil suspending agent (1:1)
The formula is as follows: 10% diflufenican, 10% 2-methyl-4-sodium chloride, 2% sodium polycarboxylate, 4% Nongru 1601#, 3% Tween-60 #, 4% Nongru 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 diflufenican, the 2-methyl-4-sodium chloride, the surfactant and other functional additives as effective components are sequentially placed in a reaction kettle, oil is added and the mixture is uniformly mixed, and the product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration. The main equipment is a batching kettle, a colloid mill or a homogenizing mixer, and a sand mill.
Example 14: 15% diflufenican-2-methyl-4-chloro sodium dispersible oil suspending agent (1:4)
The formula is as follows: 3% diflufenican, 12% 2-methyl-4-sodium chloride, 2% sodium lignosulfonate, 5% span-60 #, 5% agricultural 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 13.
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 are gramineous weeds such as physalis sobol, bluegrass (Poa annua), barnyard grass (Echinochloa crusgalli (L.) Beauv), broad-leaved weeds such as Cardamine hirsuta L, cleavers (Galium aparine) and Veronica dyma.
Reagent to be tested: 97% diflufenican active compound and 98% 2-methyl-4-chloro-sodium active compound are provided by research and development center of Heliel pharmaceutical industry group, Inc.
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.
And (3) test results:
TABLE 1 Combined Effect of diflufenican and 2-methyl-4-chloro-sodium on alopecurus
The test results show (see table 1): the diflufenican and 2-methyl-4-sodium chloride are mixed to have good indoor activity on the alopecurus as a result, when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:50-50:1, the CTC is more than 80, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has additive or synergistic effect on the indoor activity of the alopecurus as a result; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:20-20:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on the indoor activity of the alopecurus; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:5-3:1, the CTC is more than 150, which shows that the indoor activity synergy of diflufenican and 2-methyl-4-sodium chloride is obvious; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:3-2:1, the CTC is more than 190, which shows that the synergy of diflufenican and 2-methyl-4-sodium chloride in the indoor activity of the alopecurus maiden is more obvious; the preferable mass ratio of diflufenican to 2-methyl-4-sodium chloride for preventing and killing indoor activity of the alopecurus maiden is as follows: 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1, wherein when the weight ratio of diflufenican to 2-methyl-4-chloro-sodium is 1:1, the synergistic effect is most obvious, and the co-toxicity coefficient is 228.06.
TABLE 2 Combined Effect of diflufenican and 2-methyl-4-chloro-sodium on Poa annua
The test results show (see table 2): the diflufenican and 2-methyl-4-sodium chloride are mixed to have good indoor activity on the annual bluegrass, when the weight ratio of the diflufenican to the 2-methyl-4-sodium chloride is 1:50-50:1, the CTC is more than 80, which shows that the mixing of the diflufenican and the 2-methyl-4-sodium chloride has additive or synergistic effect on the indoor activity of the annual bluegrass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:30-10:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on the indoor activity of bluegrass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:20-3:1, the CTC is more than 150, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has obvious synergy effect on the indoor activity of the bluegrass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:5-2:1, the CTC is more than 190, which shows that the synergy of diflufenican and 2-methyl-4-sodium chloride in the mixing process is more remarkable for the indoor activity of the bluegrass; the preferable mass ratio of the diflufenican to the 2-methyl-4-sodium chloride for preventing and killing the indoor activity of the bluegrass is as follows: 1:30, 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1 and 10:1, wherein when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 2:1, the synergistic effect is most obvious, and the co-toxicity coefficient is 237.24.
TABLE 3 Combined action of diflufenican and 2-methyl-4-chloro-sodium on barnyard grass
The test results show (see table 3): the diflufenican and 2-methyl-4-sodium chloride are mixed to have good indoor activity to the barnyard grass, when the weight ratio of the diflufenican to the 2-methyl-4-sodium chloride is 1:50-50:1, the CTC is more than 80, which shows that the mixing of the diflufenican and the 2-methyl-4-sodium chloride has additive or synergistic effect on the indoor activity of the barnyard grass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:30-20:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on the indoor activity of barnyard grass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:10-5:1, the CTC is more than 150, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has obvious synergy effect on the indoor activity of barnyard grass; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:3-2:1, the CTC is more than 190, which shows that the synergy of diflufenican and 2-methyl-4-sodium chloride in mixing is more remarkable for the indoor activity of barnyard grass; the preferable indoor activity ratio of diflufenican to 2-methyl-4-sodium chloride for preventing and killing barnyard grass 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 and 20:1, wherein when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:1, the synergistic effect is most obvious, and the co-toxicity coefficient is 275.74.
TABLE 4 Combined Effect of diflufenican and 2 Methyl-4-chloro-sodium on Cardamine
The test results show (see table 4): the diflufenican and 2-methyl-4-sodium chloride are mixed to have good indoor activity on cardamine hirsute, when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:50-50:1, CTC is more than 80, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has additive or synergistic effect on the indoor activity of cardamine hirsute; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:20-10:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on indoor activity of cardamine; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:5-5:1, the CTC is more than 150, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has obvious synergy effect on indoor activity of cardamine; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:3-3:1, the CTC is more than 190, which shows that the synergistic effect of diflufenican and 2-methyl-4-sodium chloride mixed in the indoor activity of cardamine is more remarkable; the optimal indoor activity ratio of diflufenican to 2-methyl-4-sodium chloride for controlling cardamine is as follows: 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1 and 10:1, wherein when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:1, the synergistic effect is most obvious, and the co-toxicity coefficient is 265.13.
TABLE 5 Combined Effect of diflufenican and 2 Methyl-4-chloro-sodium on Galium
The test results show (see table 5): when diflufenican and 2-methyl-4-sodium chloride are mixed, the indoor activity of the cleavers is good, and when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:50-50:1, CTC is more than 80, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has additive or synergistic effect on the indoor activity of the cleavers; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:10-20:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on the indoor activity of cleavers; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:3-5:1, CTC is more than 150, which shows that the combination of diflufenican and 2-methyl-4-sodium chloride has obvious synergy effect on the indoor activity of cleavers; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:1-3:1, CTC is more than 180, which shows that the combination of diflufenican and 2-methyl-4-sodium chloride is more remarkable for the indoor activity synergy of cleavers; the preferred indoor activity ratio of diflufenican to 2-methyl-4-sodium chloride for preventing and killing cleavers is as follows: 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1, wherein when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 2:1, the synergistic effect is most obvious, and the co-toxicity coefficient is 232.48.
TABLE 6 Combined Effect of diflufenican and 2-methyl-4-chloro-sodium on Veronica
The test results show (see table 6): the diflufenican and 2-methyl-4-sodium chloride are mixed to have good indoor activity to the speedwell, and when the weight ratio of the diflufenican to the 2-methyl-4-sodium chloride is 1:50-50:1, the CTC is more than 80, which indicates that the mixing of the diflufenican and the 2-methyl-4-sodium chloride has additive or synergistic effect on the speedwell indoor activity; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:20-20:1, the CTC is more than 120, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has synergistic effect on the indoor activity of the speedwell; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:5-3:1, the CTC is more than 150, which shows that the mixing of diflufenican and 2-methyl-4-sodium chloride has obvious synergy effect on the indoor activity of the speedwell; when the weight ratio of diflufenican to 2-methyl-4-sodium chloride is 1:3-1:1, the CTC is more than 180, which shows that the synergy of diflufenican and 2-methyl-4-sodium chloride in the mixing process is more remarkable for the indoor activity of the speedwell; the preferable mass ratio of diflufenican to 2-methyl-4-chloro-sodium in the salmons control room is as follows: 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1, wherein when the weight ratio of diflufenican to 2-methyl-4-chloro-sodium is 1:2, the synergistic effect is most obvious, and the co-toxicity coefficient is 228.00.
Example 16: diflufenican and 2-methyl-4-sodium chloride are mixed to prevent and control the field pesticide effect of weeds in wheat fields.
Reagent to be tested: 30% diflufenican-2-methyl-4-sodium chloride wettable powder (1:1), 15% diflufenican-2-methyl-4-sodium chloride water dispersible granules (2:1), 15% diflufenican-2-methyl-4-sodium chloride suspending agent (1:2), 20% diflufenican-2-methyl-4-sodium chloride dispersible oil suspending agent (1:1), 30% diflufenican suspending agent and 12% 2-methyl-4-sodium chloride water emulsion.
Test work: wheat jimai No. 21.
The conditions of the test were as follows: the test site is arranged in a test base of a wind shift store in China, Qingdao city, Shandong province. The medicine is taken after winter wheat is used for the next year.
And (3) experimental design: the test has 6 treatments, the dosage is shown in table 7, and the control is set with clear water, and each treatment is repeated for 4 times, and each time is repeated for 20 square meters.
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.
And (3) test results:
TABLE 7 Diflufenican and 2-methyl-4-chloro-sodium mixed herbicide effect in wheat field
The test results show (see table 7) that the control effect of the diflufenican and the 2-methyl-4-sodium chloride mixed in 30 days after the application is 84.36-95.14%, and the fresh weight control effect is 87.69-96.62%, which are respectively higher than the control effect of the contrast agent, such as 77.68%, 68.51%, 79.64% and 71.42%. In the test process, after the pesticide is applied, the diflufenican and the 2-methyl-4-sodium chloride are mixed, and the phenomenon of phytotoxicity to the growth of wheat leaves does not occur.
Claims (9)
1. A weeding composition containing diflufenican and 2-methyl-4-sodium chloride is characterized in that the weight ratio of the active ingredients of diflufenican to 2-methyl-4-sodium chloride is 1:50-50: 1.
2. The herbicidal composition as claimed in claim 1, wherein the weight ratio of diflufenican to 2-methyl-4-chloro sodium is 1:30-20: 1.
3. The herbicidal composition as claimed in claim 1, wherein the weight ratio of diflufenican to 2-methyl-4-chloro sodium is 1:5-3: 1.
4. The herbicidal composition as claimed in claim 1, wherein the weight ratio of diflufenican to 2-methyl-4-chloro-sodium is 1:2-2: 1.
5. A herbicidal composition according to claim 1, characterized in that the sum of the effective components diflufenican and 2-methyl-4-chloro sodium accounts for 1-9%, preferably 20-60% of the composition.
6. 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.
7. Use of the herbicidal composition according to any one of claims 1 to 6 for controlling unwanted vegetation.
8. Use of the herbicidal composition according to claim 7 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 cardamine hirsute, cleavers and speedwell.
9. A method for controlling unwanted plants, characterized in that the herbicidal composition containing diflufenican with sodium 2-methyl-4-chloride according to any one of claims 1-8 is applied to the growing place and/or foliage and/or stems of unwanted plants; preferably, the locus of the unwanted 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 cardamine hirsute, cleavers and speedwell.
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