Weeding and yield increasing composition and application thereof

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to a weeding and yield increasing composition taking 2, 4-D butyric acid, acifluorfen and bentazone as active ingredients and application of the weeding and yield increasing composition. The composition is prepared from 2, 4-D butyric acid, acifluorfen and bentazone, and the mass ratio of the 2, 4-D butyric acid to the acifluorfen to the bentazone is (1-30): (1-16): (1-75). The weeding and yield increasing composition is high in weeding activity, capable of increasing the yield of peanuts, capable of achieving ternary compounding, synergistic in effect, wide in weed control spectrum, long in lasting period, high in safety and not prone to generating resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of pesticides, and particularly relates to a weeding and yield-increasing composition with 2,4-dichlorophenoxybutyric acid, acifluorfen-methyl, and bentazone as active ingredients and its application. Background Art

[0002] Weeds in peanut fields mainly include gramineous weeds, broad-leaved weeds, and sedges. Gramineous weeds account for 60%, broad-leaved weeds account for 30%, and sedges account for 10%. In the market, the main herbicides for gramineous weeds are clethodim, quizalofop-p-ethyl, and haloxyfop-r-methyl, which are safe for peanuts and can effectively control gramineous weeds. No obvious resistance has been generated in most areas. Bentazone can be effectively used to control sedges. The main herbicides for broad-leaved weeds are acifluorfen-methyl, fomesafen, fluoroglycofen-ethyl, bentazone, and chlorimuron-ethyl. Fomesafen and fluoroglycofen-ethyl are extremely prone to causing phytotoxicity to peanuts, resulting in leaf spots. The cost of using chlorimuron-ethyl is relatively high. The most commonly used mixture in the market is the mixture of acifluorfen-methyl and bentazone, but its effect on Commelina communis, Acalypha australis, and large-aged Chenopodium album is relatively poor. For the control of broad-leaved weeds in the field, acifluorfen-methyl and bentazone are used all year round in peanut fields, which is easy to produce drug resistance and is prone to phytotoxicity when the dosage is increased. At present, the solution is to solve the problems of high toxicity and poor effect of single pesticide formulations through the compounding of herbicides. However, whether the alternate use of herbicides can delay the generation of resistance of the target object and have an ideal use effect is unpredictable and is a research hotspot in the current pesticide field. Summary of the Invention

[0003] The purpose of the present invention is to provide a weeding and yield-increasing composition with 2,4-dichlorophenoxybutyric acid, acifluorfen-methyl, and bentazone as active ingredients, which is safe, low-toxic, highly efficient, fast-acting, and has a long-lasting effect, is beneficial to expanding the herbicidal spectrum, comprehensively controls weeds in peanut fields, and at the same time increases the yield of peanuts, and its application.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A weeding and yield-increasing composition, the composition is 2,4-dichlorophenoxybutyric acid, acifluorfen-methyl, and bentazone, and the mass ratio is 2,4-dichlorophenoxybutyric acid: acifluorfen-methyl: bentazone = (1-30):(1-16):(1-75).

[0006] The mass ratio of the composition is 2,4-dichlorophenoxybutyric acid: acifluorfen-methyl: bentazone = (15-30):(12-16):(50-75).

[0007] An application of the weeding and yield-increasing composition, the application of the composition in the preparation of a herbicide for controlling weeds in peanut fields.

[0008] The weeds in the peanut field are one or more of Acalypha australis, Solanum nigrum, Commelina communis, Xanthium sibiricum, Amaranthus retroflexus, Bidens pilosa, Polygonum lapathifolium, Portulaca oleracea, Hibiscus trionum, Galium aparine, Chenopodium album, Cirsium setosum, Sonchus arvensis, Cyperus rotundus, Cyperus iria, etc.

[0009] An application of the herbicidal and yield-increasing composition as described above, the application of the composition in the preparation of a preparation for promoting peanut yield increase.

[0010] A herbicide for controlling weeds in peanut fields, the herbicide is formulated by mixing the composition as the active ingredient with adjuvants permitted in agriculture; wherein, the active ingredient accounts for 0.1-99% of the mass of the herbicide.

[0011] The adjuvants are one or more of emulsifiers, stabilizers, thickeners, preservatives, solvents, defoamers, carriers, etc.

[0012] The adjuvants can be solvents (ethoxylated castor oil, water, alcohols, ketones, solvent oils, methyl oleate), penetrants (alcohol ethylene oxide condensates, fatty alcohol ethylene oxide condensates, sorbitan esters, glycerol), stabilizers (sulfated cetyl-stearyl-octadecyl alcohol and sulfated fatty alcohol ethylene glycol ethers, alkylaryl polyether alcohols, alkylphenol formaldehyde resin polyoxyethylene ethers, polyoxyethylene alkyl ethers, xanthan gum, magnesium aluminum silicate, sodium benzoate, organobentonite, ammonium sulfate), emulsifiers (sulfosuccinates, taurine derivatives and phosphates of alcohols or polyhydroxyethylated phenol phosphates, alkyl sulfates, lauryl ether sulfates, fatty alcohol sulfates, lauryl alcohol polyethylene glycol ether acetals, castor oil polyoxyethylene ethers, triphenylvinylphenol polyoxyethylene ether phosphates, calcium dodecylbenzenesulfonate, polyoxyethylene sorbitan monooleate, sodium dodecyl sulfate), wetting agents (sulfosuccinates, alkyl sulfonate salts, alkylaryl sulfonates, octylphenol, nonylphenol), dispersants (polyacrylates, lignosulfonates, phenol sulfonates or naphthalene sulfonates, polymers of ethylene oxide with aliphatic alcohols or with aliphatic acids or with aliphatic amines and substituted phenols, lignosulfite waste liquor, condensates of naphthalene or naphthalene sulfonic acid with phenol and formaldehyde, sodium lignosulfonate, naphthalene sulfonates, calcium lignosulfonate, sodium salt of naphthalene sulfonate formaldehyde condensate), thickeners, pH regulators, defoamers (polyoxyethylene octyl phenyl ether, ethoxylated isooctyl ether, alkyl phenyl polyethylene glycol ether, tributyl phenyl polyethylene glycol ether, tristearyl phenyl polyethylene glycol ether, polyvinyl alcohol, ethoxylated polyoxypropylene, block polyethers), antifreeze agents, carriers and fillers (white carbon black, kaolin, proteins, denatured proteins, polysaccharides, hydrophobically modified starches, polycarboxylates, polyoxyalkylates, polyvinylamines, polyvinylpyrrolidone and copolymers, clay, natural or synthetic silicates, silica, resins), etc., a mixture of one or several of them.

[0013] The dosage form of the herbicide is a soluble concentrate, water dispersible granules, dispersible oil concentrate, water suspension concentrate or wettable powder.

[0014] The present invention has positive effects: (1) The weeding and yield-increasing composition of the present invention is safe for peanuts, accelerates the pegging of peanuts, promotes fruit setting of peanuts, and increases peanut yield; (2) The weeding and yield-increasing composition of the present invention is a ternary mixture with complementary advantages and synergistic effects; (3) The weeding composition of the present invention has a broad herbicidal spectrum and a long effective period; (4) The weeding composition of the present invention has high safety: The herbicide composition avoids the risk of phytotoxicity caused by excessive use of a single herbicide. Bentazone used alone is very unsafe for rice at high doses. The three are compounded to reduce the dosage of each used alone and improve the safety for crops. (4) The weeding composition of the present invention delays weed resistance: When a single herbicide is used continuously for several years and the dosage is continuously increased, weeds are extremely likely to develop resistance. Selecting this compound composition for foliar treatment of the herbicide can effectively control most weeds in peanut fields, delay weed resistance, and extend the service life of the herbicide. Specific Embodiments

[0015] The following describes the specific embodiments of the present invention in detail with reference to the examples, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0016] Indoor Activity Determination:

[0017] Test agents: 95% 2,4-D butyric acid technical and 95% bentazone technical are both from Liaoning Xianda Agricultural Science Co., Ltd.; 88% acifluorfen technical is from Jiangsu Changqing Agrochemical Co., Ltd., Nantong.

[0018] Test targets: Seeds of Commelina communis were collected from Qian'an County, Songyuan City, Jilin Province in 2022; Seeds of Acalypha australis were collected from Fuyu City, Songyuan City, Jilin Province in 2022.

[0019] Design of agent preparation: After the test agents are completely dissolved in DMF, they are added to an aqueous solution containing 0.3% Tween-80, stirred evenly, and prepared into a liquid medicine containing a certain active ingredient for standby.

[0020] Test method: The greenhouse potting method is adopted. The test soil is the special test soil collected from the plot without using medicine. The special test soil is filled into flower pots; the flower pots are placed in a basin filled with water, and the soil is kept moist by the seepage irrigation method at the bottom of the pot. Seeds of Commelina communis are sown in the flower pots and covered with 1 cm of soil after sowing. They are moved into an artificial climate chamber for cultivation. Thinning and finalizing the plants at the 2-leaf stage, and keeping 10 weeds with consistent growth vigor in each pot. When the growth reaches the 3-4 leaf stage, foliar spraying treatment is carried out, and at the same time, an aqueous solution containing 0.3% Tween-80 in equal amount is set as the blank control. Weigh the fresh weight of the above-ground part of the weeds 21 days after treatment, and calculate the control effect of the fresh weight.

[0021]

[0022] Evaluation method of combined action: The combined action mode of herbicides was evaluated according to the Colby method (NY / T1155.7-2006), and the formula was: E0=100-X×Y×Z / 100×100, where X was the percentage of the fresh weight of the target weeds to the fresh weight of the control when component A was used alone; Y was the percentage of the fresh weight of the target weeds to the fresh weight of the control when component B was used alone; Z was the percentage of the fresh weight of the target weeds to the fresh weight of the control when component C was used alone; E0 was the theoretical fresh weight control effect of the target when component A, component B and component C were mixed; E was the actual fresh weight control effect of the target when component A, component B and component C were used alone or mixed. The results are shown in Tables 1 and 2 (unless otherwise specified, the effects in the following tables are all the effects of the application method of stem and leaf spray treatment);

[0023] Evaluation criteria: When E-E0>10%, it is a synergistic effect, E-E0<–10% is an antagonistic effect, and E-E0 between –10% and 10% is an additive effect.

[0024] Table 1 Indoor activity test of each agent treatment on Duckweed

[0025]

[0026]

[0027] Table 2 Indoor activity test of each agent treatment on Amaranthus tricolor

[0028]

[0029]

[0030] It can be seen from the indoor activity determination in Table 1 and Table 2 that the effects of 2,4-D butyric acid, trifluorfen, and bentazon on Duck toe grass and Amaranthus chinensis at different doses are poor, and they cannot achieve effective control. The different ratios of the ternary combination scheme can achieve a coordinated and synergistic effect, making up for the lack of herbicidal activity of single preparations and two-component compound preparations, as well as increasing the herbicidal spectrum. The ternary combination scheme significantly enhances the effect and inhibits the growth of Duck toe grass and Amaranthus chinensis. It can be seen that the ternary mixture of 2,4-D butyric acid, trifluorfen, and bentazon is reasonable and feasible.

[0031] Field efficacy test:

[0032] a. Test crop: peanut (Four-grain red variety).

[0033] b. Test agents: 30% 2,4-D butyric acid soluble concentrate is from Shandong Xianda Agrochemical Co., Ltd.; 440 g / L fluoroglycofen-ethyl + bentazone aqueous solution (with the active ingredients and contents being fluoroglycofen-ethyl 80 g / L and bentazone 360 g / L respectively) is from Jiangsu Changqing Biotechnology Co., Ltd.

[0034] c. Application stage: At the 3 - 5 leaf stage of peanuts and the 2 - 4 leaf stage of weeds.

[0035] d. Test method: According to the herbicide composition provided in the embodiment, field verification was carried out. The test location was in Songyuan City, Jilin Province. The main weeds in the field were Amaranthus viridis, Chenopodium album, and Commelina communis. The plot area was 30 m 2 , and each treatment was repeated 3 times. After application, all treatments were normally managed to ensure that the water, fertilizer conditions and field management of all treatments were the same.

[0036] e. Investigation method: At 21 days after treatment, the treated area and the control area were observed, the remaining weed numbers were counted, and the plant control efficacy of weeds in the treated area was calculated. Calculate the plant control efficacy (%),

[0037] Plant control efficacy (%) = (number of weed plants in the control - number of weed plants in the treatment) / number of weed plants in the control × 100. At the same time, at the peanut harvest stage, 3 peanut plants with average growth vigor and a ridge length of 1 meter were selected in the test treatment area for yield measurement, and their average yield was calculated.

[0038] f. The safety of each treatment to peanuts, the yield and the plant control efficacy against Chenopodium album are as follows in the table:

[0039]

[0040] At 21 days after treatment, the growth vigor and height of peanuts were observed. All treatments were safe for peanuts and did not affect their normal growth after application.

[0041] It can be concluded from the table that when using fluoroglycofen-ethyl alone, the weed control is not complete and there are some residues of weeds. The compounding with 2,4-D butyric acid has obvious synergistic effects. With the increase of the dosage, the control efficacy against weeds gradually increases; at the same time, with the gradual increase of the dosage of 2,4-D butyric acid, the peanut yield also increases. When the dosage is 20 g a.i. / mu and 30 g a.i. / mu, compared with 10 g a.i. / mu and manual weeding, the peanut yield increases significantly, and the gap between them is not obvious.

[0042] In summary, the herbicidal and yield-increasing composition of the present invention adopts a compounding scheme of three active ingredients. Its activity and herbicidal effect are not simply the sum of the activities of each component. Compared with the existing single preparations, it has a significant herbicidal effect, obvious synergistic effects, can delay resistance, is safe for crops, and at the same time, compared with the untreated treatment, it has an obvious yield-increasing effect on peanuts, meeting the safety requirements of pesticide preparations.

Claims

1. A weed control and yield increasing composition, characterized in that: The composition is 2,4-D butyric acid, acifluorfen and bentazone, and the mass ratio of 2,4-D butyric acid: acifluorfen: bentazone is (1-30): (1-16): (1-75).

2. The weed control and yield increasing composition according to claim 1, characterized in that: The composition has a mass ratio of 2,4-D butyric acid: acifluorfen: bentazone of (15-30):(12-16):(50-75).

3. An application of the weed control and yield increasing composition according to claim 1, characterized in that: The composition is used in preparing a herbicide for controlling weeds in a peanut field.

4. The use of the weed control and yield increasing composition according to claim 3, characterized in that: The weeds in the peanut field are one or more of Amaranthus chinensis, Solanum nigrum, Duckweed, Xanthium sibiricum, Amaranthus retroflexus, Bidens pilosa, Polygonum sorrel, Purslane, Wild watermelon seedlings, Glechoma longituba, Chenopodium album, Echinops chinensis, Sonchus endive, Cyperus rotundus, and Cyperus rotundus.

5. An application of the weed control and yield increasing composition according to claim 1, characterized in that: The composition is used in preparing a preparation for promoting peanut yield increase.

6. A herbicide for controlling weeds in peanut fields, characterized in that: The herbicide is prepared by mixing the composition of claim 1 as an active ingredient with an adjuvant permitted by agricultural production, wherein the active ingredient accounts for 0.1-99% of the mass of the herbicide.

7. The herbicide for controlling weeds in peanut fields according to claim 6, characterized in that: The auxiliary agent is one or more of an emulsifier, a stabilizer, a thickener, a preservative, a solvent, a defoamer, and a carrier.

8. The herbicide for controlling weeds in peanut fields according to claim 6, characterized in that: The herbicide is in the form of a soluble agent, a water-dispersible granule, a dispersible oil, a water suspension or a wettable powder.

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