阅读说明：本技术 一种含苯嗪草酮的除草组合物 (Herbicidal composition containing metamitron ) 是由 李玉洁 李冰清 于 2020-06-19 设计创作，主要内容包括：本申请涉及一种对棉花和后茬作物安全的除草组合物,所述除草组合物配方合理、用药成本低,且对一定的靶标具有协同防效。所述除草组合物至少包含苯嗪草酮、二甲戊乐灵和丙炔氟草胺三组分,活性成分质量比为(1-100)：(1-100)：(1-100),优选为(1-10)：(1-10)：(1-10)。所述除草组合物按照本技术领域技术人员所公知的方法可以配制的制剂剂型包括悬浮剂、悬乳剂、可分散油悬浮剂、可湿性粉剂、水分散粒剂、颗粒剂和微囊悬浮-悬浮剂,活性成分在制剂中的重量百分含量为1％-80％,优选为5％～70％。所述组合物用于防除棉花田杂草。(The application relates to a weeding composition safe to cotton and afterreap crops, which has the advantages of reasonable formula, low medication cost and synergistic control effect on a certain target. The weeding composition at least comprises three components of metamitron, pendimethalin and flumioxazin, and the mass ratio of the active ingredients is (1-100): (1-100): (1-100), preferably (1-10): (1-10): (1-10). The preparation formulation of the weeding composition which can be prepared by a method known by a person skilled in the art comprises a suspending agent, a suspoemulsion, a dispersible oil suspending agent, a wettable powder, a water dispersible granule, a granule and a microcapsule suspension-suspending agent, wherein the weight percentage of the active ingredients in the preparation is 1-80%, and preferably 5-70%. The composition is used for preventing and removing weeds in cotton fields.)

1. A method for preventing and removing gramineous and broadleaf weeds in a cotton field is characterized by comprising the step of treating the cotton field by adopting a compound soil-closed weeding composition at least comprising metamitron, pendimethalin and flumioxazin, wherein the mass ratio of the metamitron, the pendimethalin and the flumioxazin in the weeding composition is (1-100): (1-100): (1-100).

2. The method according to claim 1, characterized in that the weight ratio of active ingredients in the herbicidal composition is preferably (1-10): (1-10): (1-10).

3. The method as set forth in claim 1 or 2, characterized in that the herbicidal composition can be formulated in the form of a suspension, a suspoemulsion, a dispersible oil suspension, a wettable powder, a water dispersible granule, a granule and a microcapsule suspension-suspension.

4. The method as claimed in claim 1 or 2, characterized in that the active ingredient in the herbicidal composition is present in an amount of 1% to 80%, preferably 5% to 70% by weight of the formulation.

5. The application of the compound weeding composition in preventing and removing gramineous and broadleaf weeds in cotton fields is characterized in that the weight ratio of metamitron, pendimethalin and flumioxazin in the weeding composition is (1-100): (1-100): (1-100).

6. A herbicidal composition as claimed in any one of claims 1 to 5.

Technical Field

The invention relates to a weeding composition, which consists of active ingredients of metamitron, pendimethalin and flumioxazin, and belongs to the technical field of compound pesticide compounding.

Background

Metamitron, common name metamitron, chemical name: 3-methyl-4-amino-6-phenyl-4, 5-dihydro-1, 2, 4-triazine-5-ketone) which structurally belongs to a trizin ketone compound and belongs to a photosynthesis inhibitor in the aspect of action mechanism. Is mainly used for preventing and killing gramineous weeds and broad-leaved weeds in beet fields, such as black nightshade, chickweed, bluegrass, alopecurus, cleavers and the like.

Pendimethalin, english generic name pendimethalin, chemical name: n- (1-ethyl propyl) -2, 6-dinitro-3, 4-dimethylaniline structurally belongs to aniline herbicides and belongs to a meristem cell division inhibitor in the action mechanism. Does not affect the germination of the weed seeds and plays a role after the sprouts and the sprouts roots absorb the medicament in the germination process of the weed seeds. The dicotyledonous plant absorption part is hypocotyl; the monocotyledon absorbs the part as the bud, and the damage symptom is that the bud and the secondary root are inhibited, and finally the death is caused. Pendimethalin is mainly used for preventing and removing annual gramineous weeds, part of broadleaf weeds and nutgrass flatsedge.

Flumioxazin, the english generic name flumioxazin, chemical name: 7-fluoro-6- (3,4,5, 6-tetrahydro) phthalimido-4- (2-propynyl) -1, 4-benzoxazine-3 (2H) -ketone, which belongs to a cyclic imine herbicide in structure. The flumioxazin is a herbicide absorbed by buds and leaves, can effectively prevent and kill 1-year-old broadleaf weeds and part of gramineous weeds when being used for soil treatment, is easy to degrade in the environment, and is safe for succeeding crops. Cotton and peanut have good drug resistance. Maize, wheat, barley, rice have moderate tolerance.

The residue problem caused by long-term use of the commonly used cotton field herbicides (such as fenoxaprop-P-ethyl, imazamox, clethodim, nicosulfuron, bentazon and the like or mixed preparations thereof) on the market at present becomes an important potential safety hazard influencing the growth of the succeeding crops. Meanwhile, many weeds have become resistant to drugs with the single use of a large area of the herbicide product land, resulting in the reduction of the effect of the herbicide.

Disclosure of Invention

The invention aims to provide a weeding composition safe to cotton and succeeding crops, which has the advantages of reasonable formula, low medication cost and synergistic control effect on a certain target. The weeding composition at least comprises three components of metamitron, pendimethalin and flumioxazin.

It is another object of the present invention to provide a herbicidal composition formulation comprising at least metamitron, pendimethalin and flumioxazin.

The third purpose of the invention is to provide the application of the composition in controlling weeds in cotton fields.

In order to overcome the defect of single preparation or binary combination in the prior art, the technical scheme of the weeding composition is as follows:

A) a first active ingredient, metamitron;

B) a second active ingredient pendimethalin;

C) the third active component flumioxazin.

The mass ratio of the first active ingredient to the second active ingredient to the third active ingredient is (1-100): (1-100): (1-100), preferably (1-10): (1-10): (1-10).

The herbicidal composition containing metamitron can be prepared into preparations including suspending agents, suspoemulsions, dispersible oil suspending agents, wettable powder, water dispersible granules, granules and microcapsule suspension-suspending agents according to methods known by the technical field, and the weight percentage of active ingredients in the preparation is 1-80%, preferably 5-70%.

For suspending agents, optional adjuvants include: dispersing agents such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene formaldehyde condensate sulfonate, alkylphenol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether sulfonate, phenethyl phenol polyoxyethylene ether phosphate, alkyl polyoxyethylene ether sulfonate, polyoxyethylene polyoxypropylene ether block copolymer, nekal, dodecyl polyoxyethylene ether phosphate, etc.; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, phenethylphenol polyoxyethylene ether phosphate ester, alkylsulfate, alkylsulfonate, alkylnaphthalenesulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, tristyrylphenol polyoxypropylene polyoxyethylene block polymer, and the like; thickening agents such as one or more of xanthan gum, polyvinyl alcohol, bentonite, magnesium aluminum silicate, carboxymethyl cellulose, carboxyethyl cellulose, methyl cellulose, and the like; preservatives such as one or more of formaldehyde, benzoic acid, sodium benzoate, potassium sorbate, isothiazolinone, and the like; defoaming agents such as one or more of silicone oil, silicone compounds, C10-20 saturated fatty acid compounds, C8-10 fatty alcohols, hexanol, butanol, octanol, etc.; antifreeze agents such as one or more of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, sorbitol, urea, inorganic salts, etc.; the water is deionized water.

For suspoemulsions, optional adjuvants include: emulsifier such as one or more of calcium dodecylbenzene sulfonate (Nongru 500#), Nongru 700#, Nongru 2201, span-60 #, emulsifier T-60 (common name: sorbitan monostearate polyoxyethylene ether), TX-10 (common name: octylphenol polyoxyethylene (10) ether), Nongru 1601#, Nongru 600#, Nongru 400#, etc.; dispersants such as one or more of polycarboxylates, lignosulfonates, alkylnaphthalenesulfonates, and the like; solvents such as one or more of dimethyl phthalate, dibutyl phthalate, ethyl acetate, methyl benzoate, and the like; defoaming agents such as one or more of silicone oil, silicone compounds, C10-20 saturated fatty acid compounds, C8-10 fatty alcohols, hexanol, butanol, octanol, etc.; 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 water is deionized water.

For dispersible oil suspensions, optional adjuvants include: dispersants such as one or more of polycarboxylate, alkylnaphthalene sulfonate, TERSPERSE2425 (alkylnaphthalene sulfonate, available from henseme, usa); emulsifier such as one or more of Nongru 700# (common name: alkylphenol formaldehyde polyoxyethylene ether), Nongru 2201, span-60 (common name: sorbitan monostearate), Tween-60 (common name: sorbitan fatty acid ester polyoxyethylene ether), Nongru 1601# (common name: triphenylethylphenol polyoxypropylene polyoxyethylene block polymer), TERSPERSE4894 (Hensmei corporation, USA), TERSPERSE2500 (Hensmei corporation, USA); 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, TERSPERSE2500 (available from henseme, usa); thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride; dispersing medium such as one or more of cotton oil, oleum Rapae, oleum Maydis, methyl oleate, and oleum ricini.

For wettable powders, optional adjuvants include: 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; the filler is one or more of ammonium sulfate, urea, sucrose, glucose, diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like.

For water dispersible granules, optional auxiliaries include: dispersants such as one or more of polycarboxylates (TERSPERSE2700, 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 and its derivatives, bentonite, etc.; binder such as one or more of starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethylcellulose, sucrose, etc.; the filler is one or more of diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like.

For granules, optional adjuvants include: carriers such as one or more of clay, kaolin, talc, calcium carbonate, corn starch, aluminum silicate, and the like; dispersants such as one or more of polycarboxylates, lignosulfonates, alkylnaphthalenesulfonates, and the like; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, and the like; binder such as one or more of polyvinyl alcohol, dextrin, polyvinylpyrrolidone, etc.

For microcapsule suspension-suspending agents, optional adjuvants include: disintegrating agent such as one or more of bentonite, urea, ammonium sulfate, polyvinylpyrrolidone, glucose, and sodium bicarbonate; preservatives such as one or more of formaldehyde, benzoic acid, sodium benzoate, potassium sorbate, isothiazolinone, and the like; emulsifier such as fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether, calcium dodecylbenzene sulfonate, alkylphenol polyoxyethylene ether, styrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, sorbitan monostearate polyoxyethylene ether, fatty acid polyoxyethylene ether phosphate, etc.; dispersing agents such as one or more of polycarboxylates, lignosulfonates, alkylphenol polyoxyethylene ether formaldehyde condensate Sulfates (SOPA), naphthalene and alkylnaphthalene formaldehyde condensate sulfonates, EO-PO block polyethers, alkylphenol polyoxyethylene ether phosphates, alkylphenol polyoxyethylene ethers, fatty acid polyoxyethylene esters, fatty amine polyoxyethylene ethers, glycerol fatty acid ester polyoxyethylene ethers, and the like; wetting agents such as one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, naphthalene sulfonate formaldehyde condensate and the like; antifreeze agents such as one or more of urea, ethylene glycol, propylene glycol, glycerol, etc.; thickening agents such as one or more of xanthan gum, carboxymethyl cellulose, carboxyethyl cellulose, methyl cellulose, magnesium aluminum silicate, polyvinyl alcohol, and the like; the defoaming agent is one or more of silicone oil, silicone compound, C10-20 saturated fatty acid compound, C8-10 fatty alcohol, ester ether, etc.

The above-mentioned optional adjuvants may be selected by those skilled in the art according to the descriptions in the literature such as "solid preparation", "liquid preparation", and "adjuvant for agricultural chemicals", but the selection of the particular adjuvant needs to be tried by a specific formulation process test, and the optional adjuvants do not always give a uniform and stable formulation.

The invention has reasonable components, good weeding effect in cotton fields, small dosage 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 effect, good safety to crops and accordance with the safety requirement of pesticide preparations.

Detailed Description

The effect of the ternary combination of metamitron, pendimethalin and flumioxazin on preventing and removing common weeds in cotton fields is verified through combined action determination.

Indoor toxicity assay

The test method refers to part 4 of agricultural chemical indoor bioassay test criteria herbicide of agricultural industry standard NY/T1155.4-2006 of the people's republic of China: activity determination test stem leaf spray method and part 7 of agricultural chemical indoor bioassay test criteria herbicide standard NY/T1155.7-2006 of the people's republic of China: combined action assay of compounding.

The test subjects were black nightshade and large crabgrass.

The original drug is prepared into the required test drug, and 6 different concentration gradients are set for each single drug and each compound drug (on the basis of the preliminary test result, the concentration gradients are set differently according to different drug proportions, and the control rate is set according to the geometric progression in the range of 5% -90%). Repeat 4 times with clear water control. The weeds are in the two-leaf or two-leaf one-heart period, and are sprayed from low dose to high dose respectively. After treatment, the mixture is placed in a greenhouse for culture and observation, and water is supplemented in a mode of infiltrating irrigation at the bottom of the pot.

Adopting DPS data processing software to process the test data, and converting according to the liquid spraying amount and the rotary disc area of the Prite spray tower to obtain ED of each medicament for different targets₅₀The value (g/ha). Evaluating the combined action of the mixture by adopting a Sun Yunpei cotoxicity coefficient method, wherein when the CTC is more than 120, the mixture has a synergistic effect, antagonism is achieved when the CTC is less than 120, and addition effect is achieved between the CTC and the CTC.

TABLE 1 Combined Effect of metamitron, pendimethalin and flumioxazin in combination with Solanum nigrum

Treatment of	ED50Value (g/ha)	Co-toxicity coefficient
			Metamitron (a)	210.28
Pendimethalin (b)	108.73
			Flumioxazin (c)	10.35
a:b:c＝1:4:1	35.52	122.26
			a:b:c＝1:4:4	15.85	132.66
a:b:c＝4:1:1	38.63	124.42
			a:b:c＝4:1:4	17.44	124.44
a:b:c＝1:1:1	21.56	125.84
			a:b:c＝10:1:5	24.67	120.13
a:b:c＝5:1:10	12.58	127.29
			a:b:c＝1:10:1	51.65	120.16
CK	-	-

TABLE 2 Combined Effect of metamitron, pendimethalin and flumioxazin combination on large crabgrass

Treatment of	ED50Value (g/ha)	Co-toxicity coefficient
			Metamitron (a)	523.45
Pendimethalin (b)	100.36
			Flumioxazin (c)	81.73
a:b:c＝1:4:1	87.73	126.65
			a:b:c＝1:4:4	79.68	124.52
a:b:c＝4:1:1	153.54	130.95
			a:b:c＝4:1:4	106.82	126.61
a:b:c＝1:1:1	101.36	122.76
			a:b:c＝10:1:5	144.67	122.55
a:b:c＝5:1:10	90.55	124.55
			a:b:c＝1:10:1	83.35	126.53
CK	-	-

Indoor toxicity test results show that: metamitron, pendimethalin and flumioxazin were as follows (1-10): (1-10): (1-10) the mixture has higher activity on both the black nightshade and the large crabgrass, and the combination of the black nightshade and the large crabgrass can obtain a synergistic control effect.

Formulation examples

To better illustrate the invention, the following description of the invention is given in conjunction with formulation examples, the percentages in the formulation being given by weight.