阅读说明：本技术 一种除草剂组合物及其应用 (Herbicide composition and application thereof ) 是由 许华 陈晓东 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种除草剂组合物及其应用,涉及农药除草剂技术领域,所述除草剂组合物的有效成分包括草铵膦、二甲四氯盐或二甲四氯脂、高效氟吡甲禾灵,所述除草剂组合物中草铵膦、二甲四氯盐或二甲四氯脂、高效氟吡甲禾灵的质量分数比为(8-32):(10-50):(1-5),所述草铵膦、二甲四氯盐或二甲四氯脂、高效氟吡甲禾灵在除草剂组合物中的总质量百分比为20%-80%；本发明的除草剂组合物的防治效果相比单剂以及两组有效成分的组合物均有了明显提高,降低了农药的使用剂量,减少了用药次数,降低用药成本,减少了农药对生态环境的不利影响。(The invention discloses a herbicide composition and application thereof, and relates to the technical field of pesticide herbicides, wherein the active ingredients of the herbicide composition comprise glufosinate-ammonium, dimethyldichloromate or methoxone and haloxyfop-R-methyl, the mass fraction ratio of the glufosinate-ammonium, the dimethyldichloromate or the methoxone to the haloxyfop-methyl in the herbicide composition is (8-32): (10-50): 1-5), and the total mass percentage of the glufosinate-ammonium, the dimethyldichloromate or the methoxone and the haloxyfop-methyl in the herbicide composition is 20-80%; compared with single-dose and two-group active ingredient compositions, the control effect of the herbicide composition is obviously improved, the using dose of pesticide is reduced, the application times and the application cost are reduced, and the adverse effect of the pesticide on the ecological environment is reduced.)

1. The herbicide composition is characterized in that the effective components of the herbicide composition comprise glufosinate-ammonium, dimethyltetrachloro salt or methoxone and haloxyfop-methyl, the mass fraction ratio of glufosinate-ammonium, dimethyltetrachloro salt or methoxone and haloxyfop-methyl in the herbicide composition is (8-32) to (10-50) to (1-5), and the total mass percentage of glufosinate-ammonium, dimethyltetrachloro salt or methoxone and haloxyfop-methyl in the herbicide composition is 20-80%.

2. The herbicide composition as claimed in claim 1, wherein the mass fraction ratio of glufosinate-ammonium, dimethyltetrachloro salt or methoxone and haloxyfop-methyl in the herbicide composition is 16:10: 2.

3. A herbicidal composition according to claim 1 or 2, wherein the methoxone salt is any one of methoxone sodium salt, methoxone potassium salt, methoxone ammonium salt, and methoxone dimethylammonium salt.

4. A herbicidal composition according to claim 1 or 2, wherein the methoxone is one of methyl methoxone butyrate, methoxone ethyl ester, methoxone butyl ester.

5. The herbicide composition as claimed in claim 3 or 4, wherein the herbicide composition is in the form of one of aqueous emulsion, microemulsion, suspension, oil suspension, wettable powder or water dispersible granule.

6. The herbicidal composition according to claim 5 for biocidal weeding, orchard weed control and crop directional spraying.

Technical Field

The invention relates to the technical field of pesticides, in particular to a weeding composition containing glufosinate-ammonium, methoxone and haloxyfop-methyl and application thereof.

Background

Glufosinate-ammonium: the glufosinate-ammonium is a broad-spectrum contact-type biocidal herbicide, has the characteristics of wide herbicidal spectrum, low toxicity, high activity, good environmental compatibility and the like, and has wide application prospect. The glufosinate-ammonium has a wide weed control spectrum, almost has a good control effect on annual or perennial weeds in most farmlands, and can be used for controlling annual and perennial dicotyledonous and gramineous weeds in orchards, vineyards, potato fields, uncultivated areas and the like, such as: alopecurus, digitaria sanguinalis, barnyard grass, wild barley, lolium multiflorum, green bristlegrass, wild wheat and the like. Can also prevent and kill off broad-leaved weeds such as quinoa, amaranth, polygonum, shepherd's purse, black nightshade, chickweed, purslane, cleavers, dandelion and the like, and also has certain effect on nutgrass flatsedge and fern.

The glufosinate-ammonium has the characteristics of wide weeding spectrum, high activity, small dosage and small environmental pressure, can quickly kill over 100 grassy and broad-leaved weeds. It can use water as base agent, and is safe and convenient for use. However, glufosinate also has the following disadvantages: it has poor control effect on some perennial tolerant plants (such as tall plants and lignified malignant weeds); the control of the old weeds is incomplete, and the old weeds are easy to death and reburning after glufosinate is used. Meanwhile, due to the long-term and large-scale use of glufosinate, many weeds already have obvious resistance to the glufosinate, so that the weeding effect is reduced. And the production and use cost of the glufosinate-ammonium single agent is high, so that the application of the glufosinate-ammonium single agent is limited.

Dimethyl tetrachloro: the methoxone is a phenoxy acetic acid selective herbicide, has strong systemic conductivity, is mainly used for post-emergence stem and leaf treatment, the medicament penetrates through a cuticle and a cytoplasmic membrane and is finally transmitted to each part, different influences are generated on nucleic acid and protein synthesis at different parts, different influences are generated by inhibiting the nucleic acid and protein synthesis at the top of a plant, the nucleic acid and protein synthesis is inhibited at the top of the plant, a growth point stops growing, young leaves cannot stretch until photosynthesis cannot normally occur; can destroy the conduction tissue of dicotyledon, and lead the growth and development to be interfered, the stem leaves to be twisted, the stem base to be enlarged and thickened or cracked, and the dicotyledon dies by losing the capability of absorbing water and nutrients. Can prevent and kill most of Cyperaceae weeds and broad-leaved weeds.

The high-efficiency haloxyfop-methyl, also known as high-efficiency canceroton, belongs to phenoxy carboxylic acid herbicides, and can be quickly absorbed by leaves of gramineous weeds after being applied to the herbicide, and the herbicide is conducted to the whole plant to inhibit the growth of plant meristems, so that the weeds are killed. The herbicide composition has long lasting period and good control effect on annual and perennial grassy weeds from the seedling stage to the tillering stage and the heading stage. The efficient haloxyfop-methyl has an action mechanism that the efficient haloxyfop-methyl is absorbed by weed stems and leaves, is conducted upwards and downwards in a plant body in a two-way manner, is accumulated on the top and an intermediate meristem, inhibits the synthesis of cell fatty acid and leads weeds to necrosis. The haloxyfop-R-methyl is a novel high-selectivity stem leaf treating agent for dry farmland. The herbicide has high selectivity between gramineous weeds and dicotyledonous crops, is used for preventing and killing annual gramineous weeds such as crabgrass, alopecurus, goosegrass, barnyard grass, green bristlegrass and moleplant seeds and perennial gramineous weeds such as bermuda grass and cogongrass rhizome, but is ineffective for the broadleaf weeds and nutgrass flatsedge.

Aiming at the limitation of the glufosinate-ammonium and the haloxyfop-R-methyl on the use of weeds, a composition which has complementary advantages and disadvantages, can enhance the control effect on the weeds and the grass, expands the weed control spectrum and simultaneously reduces the dosage and the application frequency is urgently needed to be developed.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide the compound herbicide composition which has reasonable components, good weeding effect, obvious synergy and wide weed control spectrum, is not easy to generate resistance and is used for killing the biotic weeding, preventing and removing the orchard weeds and directionally spraying the crops. Through a large number of tests, the invention selects glufosinate, methoxone and efficient haloxyfop-methyl with different types, different action mechanisms, different weed control spectrums and complementary advantages and disadvantages as effective components and reasonably matches the effective components, thereby enhancing the control effect on grass and broad weeds, expanding the weed control spectrum, reducing the dosage and the times of dosage, reducing the cost and saving the labor force.

In order to achieve the purpose, the invention is implemented according to the following technical scheme:

the effective components of the herbicide composition comprise glufosinate, dimethyltetrachloro salt or methoxone and haloxyfop-R-methyl, the mass fraction ratio of the glufosinate, the dimethyltetrachloro salt or the methoxone to the haloxyfop-methyl in the herbicide composition is (8-32) to (10-50) to (1-5), and the total mass percentage of the glufosinate, the dimethyltetrachloro salt or the methoxone and the haloxyfop-methyl in the herbicide composition is 20-80%;

preferably, the mass fraction ratio of glufosinate-ammonium, dimethyltetrachloro salt or methoxone and haloxyfop-R-methyl in the herbicide composition is 16:10: 2;

specifically, the dimethyl tetrachloro salt is any one of dimethyl tetrachloro sodium salt, dimethyl tetrachloro potassium salt, dimethyl tetrachloro ammonium salt and dimethyl tetrachloro dimethyl ammonium salt;

specifically, the methoxone is one of methoxone methyl butyrate, methoxone ethyl ester and methoxone butyl ester;

specifically, the dosage form of the herbicide composition is one of an aqueous emulsion, a microemulsion, a suspending agent, an oil suspension, wettable powder or water dispersible granules;

in particular, the herbicide composition is used for killing and weeding the biotic weed, preventing and removing the orchard weed and directionally spraying the crop.

Compared with the prior art, the herbicide composition has the following beneficial effects:

1. the herbicide composition provided by the invention shows obvious synergistic effect in a certain proportioning range, enlarges the weed control spectrum and delays the drug resistance of weeds. Compared with single-dose and two-group active ingredient compositions, the control effect of the herbicide composition is obviously improved, the using dose of pesticide is reduced, the application times and the application cost are reduced, and the adverse effect of the pesticide on the ecological environment is reduced.

2. The three effective components of the weeding composition have different action mechanisms, can overcome the defect that resistance is easy to generate after long-term single use, prolongs the service life of the herbicide, and has important significance for comprehensive treatment of weed resistance.

3. The weeding composition provided by the invention is low in use cost and convenient to use, and has important economic and social benefits when being popularized and applied.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Example 1

The weight percentage ratio of the glufosinate to the methoxone to the haloxyfop-R-methyl is (8: 10: 2.5), and the glufosinate, the methoxone to the haloxyfop-R-methyl account for 20.5% of the total weight of the aqueous emulsion.

Weighing 8% of glufosinate-ammonium, 10% of sodium dimethyltetrachloride, 2.5% of haloxyfop-R-methyl, 2.5% of toluene, 5% of alkylphenol polyoxyethylene phosphate, 1% of ethylene glycol and 0.5% of organic silicon, and supplementing water to 100% to prepare the 20.5% glufosinate-ammonium, sodium dimethyltetrachloride and haloxyfop-R-methyl water emulsion. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Example 2

The glufosinate-ammonium, the methoxone sodium and the haloxyfop-R-methyl microemulsion are prepared in a mass fraction ratio of (16: 10: 2), and the glufosinate-ammonium, the methoxone sodium and the haloxyfop-R-methyl account for 28% of the total weight of the microemulsion.

Weighing 16% of glufosinate-ammonium, 10% of sodium dimethyltetrachloride, 2% of high-efficiency haloxyfop-methyl, 2% of toluene, 8% of Nongru No. 600, 1% of glycerol, 0.5% of silicone oil, 1% of xanthan gum and water to 100% to prepare the 28% glufosinate-ammonium, sodium dimethyltetrachloride and high-efficiency haloxyfop-methyl microemulsion. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Example 3

The suspending agent comprises glufosinate-ammonium, sodium dimethyltetrachloride and haloxyfop-R-methyl, wherein the mass fraction ratio of the glufosinate-ammonium, the sodium dimethyltetrachloride and the haloxyfop-R-methyl is (20: 20: 5), and the glufosinate-ammonium, the sodium dimethyltetrachloride and the haloxyfop-R-methyl account for 45% of the total weight of the suspending agent.

Weighing 20% of glufosinate-ammonium, 20% of sodium dimethyltetrachloride, 5% of haloxyfop-R-methyl, 8% of polycarboxylate, 1.5% of propylene glycol, 0.8% of silicone compound and 0.5% of hydroxymethyl cellulose, and supplementing water to 100% to obtain 45% of glufosinate-ammonium, sodium dimethyltetrachloride and haloxyfop-R-methyl suspending agent. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Example 4

The weight percentage ratio of the glufosinate to the methoxone to the haloxyfop-R-methyl oil suspension agent is (25: 40: 1), and the total weight of the glufosinate to the methoxone to the haloxyfop-methyl oil suspension agent is 66%.

Weighing 25% of glufosinate-ammonium, 40% of sodium methoxone, 1% of haloxyn-ethyl, 10% of fatty alcohol-polyoxyethylene ether, 0.5% of xanthan gum and methyl oleate, and supplementing to 100% to obtain 66% of glufosinate-ammonium, sodium methoxone and haloxyn-ethyl oil suspension. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Example 5

The glufosinate-ammonium, the methoxone sodium and the haloxyfop-R-methyl water dispersible granule comprise, by mass, the glufosinate-ammonium, the methoxone sodium and the haloxyfop-methyl water dispersible granule are in a mass ratio of (22: 50: 3), and the glufosinate-ammonium, the methoxone sodium and the haloxyfop-methyl water dispersible granule account for 75% of the total weight of the water dispersible granule.

Weighing 22% of glufosinate-ammonium, 50% of sodium dimethyltetrachloride, 3% of haloxyfop-R-methyl, 5% of sodium dodecyl benzene sulfonate, 6% of lignin and derivative sulfonate thereof, 3.5% of ammonium sulfate and kaolin to complement to 100% to prepare 75% of glufosinate-ammonium, sodium dimethyltetrachloride and haloxyfop-R-methyl water dispersible granules. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Example 6

The glufosinate-ammonium, the methoxone sodium and the high-efficiency haloxyfop-R wettable powder have the mass fraction ratio of (32: 44: 4), and the glufosinate-ammonium, the methoxone sodium and the high-efficiency haloxyfop-R water account for 80% of the total weight of the wettable powder.

Weighing 32% of glufosinate-ammonium, 44% of sodium dimethyltetrachloride, 4% of haloxyfop-R-methyl, 3.5% of lauryl sulfate, 5.5% of naphthalene and alkyl naphthalene sulfonate formaldehyde condensate, 2.5% of ammonium sulfate and diatomite, and complementing to 100% to obtain 67% of glufosinate-ammonium, sodium dimethyltetrachloride and haloxyfop-R-methyl wettable powder. Wherein the sodium methoxone can be replaced by any one of methoxone potassium salt, methoxone ammonium salt, methoxone dimethyl ammonium salt, etc., and ester products of methoxone methyl butyrate, methoxone ethyl ester, methoxone butyl ester, etc.

Bioassay examples

Firstly, indoor bioassay experiments: the combined action type of the compound weeding composition is judged.

1. Test materials: and (3) collecting and storing seeds of gramineous weeds (large crabgrass, barnyard grass and green bristlegrass) in the field, and collecting and storing seeds of broadleaf weeds (chenopodium album and purslane) in the field, wherein the germination rate is over 90 percent.

2. Test agents: 95% of haloxyfop-p-methyl, 96% of glufosinate-ammonium and 92% of sodium methoxone

3. The test instrument: 3WT-A model spray tower, a BS124S model ten thousandth electronic balance, and an SPX intelligent biochemical incubator.

4. Test method 1: the soil for test is special soil for test collected from land without pesticide, flowerpots with consistent size are taken, the soil is filled to 2/3-degree, water is added until the soil is completely wetted, weed seeds which are forced to germinate and expose to white in a biochemical incubator are uniformly placed in a test field, 50 weed seeds are placed in each pot, each group comprises 20 pots, the test soil is cultured in a greenhouse in a conventional way until the leaf stage reaches 3-4, each reagent for test is used for spraying stem leaves of each weed under different dosages, each treatment is repeated for 3 times, and a blank control is additionally arranged. The survival rate of the weeds is counted 15 days after the spraying, and the weeding activity after the mixed application is tested by adopting a colby method. E₀=X*Y*Z……N/100^(n-1)Wherein X is the survival rate of the weed of the herbicide A when the dosage is P; y is the survival rate of the weed of the herbicide B when the dosage is Q; z is the survival rate of the weed of the herbicide C when the dosage is W; e₀The theoretical weed survival rate of the herbicide (A + B + C) at the dosage of (P + Q + W); e is the actual weed survival rate for each treatment. When E is₀An E value of greater than 10%, indicating a synergistic effect, when E is present₀Antagonism is indicated when the value of E is less than-10%, when E is less than₀An E value of. + -. 10% indicates an addition.

Table 1: judgment of combined action type of glufosinate-ammonium, dimethyldichlorometallate and haloxyfop-R-methyl on gramineous weeds and broadleaf weeds

As can be seen from the above table, E is the three active substances after being compounded₀E values of. + -. 10% or more than 10% indicate additive or synergistic action of the formulated herbicide. And glufosinate-ammonium: sodium dimethyltetrachloro salt: the proportion of the haloxyfop-R-methyl to the grass family weeds is 16:10:2₀-E =10.3, E against broadleaf weeds₀-E =10.9, E for grasses and broad-leaved weeds₀E is obviously higher than the values of other mixture ratios and is more than 10 percent. Therefore, the optimal ratio of the glufosinate-ammonium, the dimethyldichloromate and the haloxyfop-R-methyl is 16:10:2, and the synergistic effect is obvious.

5. Test method 2: the soil for the test is special soil for the test collected in a land without pesticide, flowerpots with the same size are taken, the soil is filled to the height of 2/3, water is added until the soil is completely wetted, weed seeds which are forced to germinate and expose to white in a biochemical incubator are uniformly placed in the flowerpots, 50 weed seeds are placed in each flowerpot, each group comprises 20 pots, the weed seeds are cultured in a greenhouse in a conventional way, and 50 weeds are determined in each pot after the weeds grow out. Culturing to 3-4 leaf stage, spraying stem and leaf of each weed with each test agent under different dosage, repeating for 3 times, and setting blank control. After spraying 1The survival rate of the weeds is counted for 5 days, and the weeding activity of the mixture of glufosinate-ammonium, sodium dimethyldichlorometalate and haloxyfop-R-methyl is tested by a Gowing method. E = X + Y-X Y/100, wherein X is the weed control effect of the herbicide A when the dosage is P; y is the weed control effect of the herbicide B when the dosage is Q; e₀The theoretical weed control effect of the herbicide (A + B) when the dosage is (P + Q); e is the actual weed control effect for each treatment. When E-E₀Values above 10% indicate a synergistic effect, when E-E₀Values less than-10% indicate antagonism, when E-E₀Values within. + -. 10% indicate addition.

Table 2: judgment of combined action type of gramineous weeds and broadleaf weeds by pairwise mixing and compounding of glufosinate, dimethyldichloromate and haloxyfop-R-methyl

As can be seen from the table above, the three effective substances of glufosinate-ammonium, dimethyldichloromate and haloxyfop-R-methyl are compounded in pairs to obtain E-E₀The value is within + -10%, which indicates that addition occurs after compounding. Glufosinate-ammonium in table 1: sodium dimethyltetrachloro salt: the proportion of the haloxyfop-R-methyl to the grass family weeds is 16:10:2₀-E =10.3, E against broadleaf weeds₀E =10.9, which is significantly higher than the action effect on grassy weeds and broadleaf weeds when the two are compounded.

The test results of the test method 1 and the test method 2 show that the three effective components in the herbicide composition of the invention have synergistic effect compared with the single-dose herbicide and the two-effective-component herbicide, and the control effect of the herbicide composition is obviously better than that of the single-dose herbicide and the two-effective-component herbicide composition.

Secondly, a drug effect test: the field efficacy test of the compound weeding composition

1. Test agent

(1) 20.5% glufosinate-ammonium, methoxone sodium, haloxyfop-R-methyl water emulsion (8: 10: 2.5)

(2) 28% glufosinate-ammonium, methoxone sodium, high efficiency haloxyfop microemulsion (16: 10: 2)

(3) 45% glufosinate-ammonium, methoxone sodium, haloxyfop-R-methyl suspending agent (20: 20: 5)

(4) 66% glufosinate-ammonium, methoxone sodium, high efficiency haloxyfop oil suspension (25: 40: 1)

(5) 75% glufosinate-ammonium, methoxone sodium, haloxyfop-R-methyl water dispersible granule (22: 50: 3)

(6) 80% glufosinate-ammonium, methoxone sodium, haloxyfop-R-methyl wettable powder (32: 44: 4)

(7) 20% glufosinate solution

(8) 40% wettable powder of sodium methoxone

(9) 10.8% high-efficiency haloxyfop emulsifiable concentrate

(10) 20% glufosinate-ammonium, highly effective haloxyfop-methyl microemulsion (17.5: 2.5)

(11) 26% glufosinate-ammonium and methoxone sodium aqua (16: 10)

(12) 12% methoxone sodium, highly effective haloxyfop water emulsion (10: 2)

(13) Blank control

2. The test method comprises the following steps: the experiment was carried out in 13 treatments, 3 replicates, a total of 39 treatment cells, each treatment cell having an area of 30 square meters, and randomly arranged in blocks. Accurately weighing various medicaments according to the area of a test cell, adding 30-40 kg of water per mu, diluting for the second time, stirring uniformly, and uniformly spraying by adopting a 552C type sprayer. The main weeds in the orchard are as follows: crab grass, green bristlegrass, goosegrass herb, purslane, chickweed, barnyard grass and the like. The weed control effect was measured 15 days and 30 days after application.

3. The investigation and calculation method comprises the following steps: 4 points are randomly selected in each plot, 1/4 square meters are investigated in each point, the weed condition is investigated 15 days and 30 days after the application of the herbicide, the species and the number of the weeds are recorded respectively, and the weed control effect is calculated by the following formula:

control effect (%) = [ (number of control zone weed plants-number of treatment zone weed plants)/number of control zone weed plants ] × 100

Table 3: test results of field drug effect

As can be seen from the table 3, the compound weeding composition has better control effect on both grassy weeds and broadleaf weeds, and has obvious synergistic effect compared with a single agent. Compared with the control effect of 20 percent of glufosinate-ammonium, high-efficiency haloxyfop-methyl microemulsion grass, 26 percent of glufosinate-ammonium, a methoxone sodium aqua and 12 percent of methoxone sodium, the control effect of the high-efficiency haloxyfop-methyl water emulsion on gramineous weeds and broadleaf weeds is also obviously improved.

In conclusion, the composition is reasonable, and the control effect of the compound of the glufosinate-ammonium, the dimethyldichlorometalate and the haloxyfop-R-methyl is better than the effect and the pairwise combination effect of each component when the components are used independently; has complementary advantages, reduces respective dosage, reduces use cost, enlarges weed control spectrum, has good weeding effect and obvious synergy.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.