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CN107897183B - Weeding composition containing propyzamide and oxyfluorfen and application thereof - Google Patents

Weeding composition containing propyzamide and oxyfluorfen and application thereof Download PDF

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Publication number
CN107897183B
CN107897183B CN201711376023.2A CN201711376023A CN107897183B CN 107897183 B CN107897183 B CN 107897183B CN 201711376023 A CN201711376023 A CN 201711376023A CN 107897183 B CN107897183 B CN 107897183B
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propyzamide
oxyfluorfen
herbicidal composition
composition according
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CN107897183A (en
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孙国庆
侯永生
张小兵
吴勇
张全
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Shandong Weifang Rainbow Chemical Co Ltd
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Shandong Weifang Rainbow Chemical Co Ltd
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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
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
    • 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
    • A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
    • A01N33/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds containing nitrogen-to-oxygen bonds
    • A01N33/18—Nitro compounds
    • A01N33/20—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group
    • A01N33/22—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group having at least one oxygen or sulfur atom and at least one nitro group directly attached to the same aromatic ring system

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  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a weeding composition containing propyzamide and oxyfluorfen and application thereof, the weeding composition is prepared by compounding propyzamide and oxyfluorfen, and has a good synergistic effect, wherein the weight ratio of the propyzamide to the oxyfluorfen is 1-10: 1-10. The composition of the invention can improve the pesticide effect, reduce the dosage, save the economic cost, improve the safety to crops, reduce the residue of the pesticide in the environment, delay the generation of the drug resistance of weeds, prolong the service life of the pesticide and prevent and remove most annual gramineous weeds and broadleaf weeds in ginger and garlic fields.

Description

Weeding composition containing propyzamide and oxyfluorfen and application thereof
Technical Field
The invention relates to a weeding composition, in particular to a weeding composition with propyzamide and oxyfluorfen as active pharmaceutical ingredients and application of the weeding composition in preventing and removing weeds in ginger and garlic fields, and belongs to the technical field of pesticides.
Background
The propyzamide amide herbicide has the action mechanism that the propyzamide herbicide is absorbed and conducted by root systems, interferes mitosis of weed cells, mainly prevents and treats monocotyledonous weeds and is safe to broad-leaved crops. The duration of the propyzamide in the soil can reach about 60 days, the emergence of seedlings of weeds can be effectively controlled, even after the seedlings emerge, the propyzamide can still be dead by absorbing the medicament through a coleoptile, and the propyzamide is suitable for preventing and killing annual gramineous weeds and part of small-grain seed broadleaf weeds of crops such as ginger, peanut, soybean, garlic, potato, lettuce and the like.
The oxyfluorfen belongs to fluorine-containing phenyl ether, and the selective preemergence or postemergence herbicide exerts the herbicidal activity under the condition of light, enters a plant body mainly through a coleoptile and a mesocotyl, is less absorbed by a root, and has a trace amount which is upwards transported to a leaf part through the root. The oxyfluorfen is used for pre-emergence and post-emergence application in cotton, onion, peanut, soybean, beet, fruit tree and vegetable fields, etc., and can prevent and kill monocotyledonous and broadleaf weeds such as barnyard grass, green bristlegrass, stramonium, piemarker, leaf mustard, creeping wheatgrass, ragweed, etc.
At present, herbicide varieties containing a single active component in agricultural production have different degrees of defects in weed control, such as the problems that weeds are easy to generate drug resistance after continuous application, the weed control spectrum is narrowed, and environmental pollution is caused. The herbicide compounding or mixing is an effective method for expanding the weeding spectrum, improving the control effect, reducing the dosage, reducing the residue and delaying the occurrence and development of the drug resistance. The propyzamide and the oxyfluorfen have inhibiting effect on gramineous weeds and broadleaf weeds, but the single use has poor control effect, and no related report of compounding the propyzamide and the oxyfluorfen is found at present.
Disclosure of Invention
Aiming at the defect of poor weeding effect of single active ingredients of propyzamide and oxyfluorfen, the invention provides a weeding composition containing propyzamide and oxyfluorfen, the weeding composition combines the propyzamide and the oxyfluorfen according to a specific proportion, has obvious synergistic effect, overcomes the defects of narrow weed prevention spectrum, poor safety to crops, reduced pesticide effect and resistance generation of single component, enlarges the weeding spectrum, reduces the using amount of the pesticide, slows down the generation of the pesticide resistance, improves the weeding effect and is beneficial to the sustainable development of the environment.
The invention also provides application of the weeding composition in preventing and killing ginger and garlic field annual grassy weeds and broadleaf weeds. The composition compounded by propyzamide and oxyfluorfen according to a specific proportion has an obvious synergistic effect and can persistently and effectively prevent and kill most annual gramineous weeds and broadleaf weeds in ginger and garlic fields. The compound composition and the application thereof are not reported at present.
The specific technical scheme of the invention is as follows:
a weeding composition comprises active pharmaceutical ingredients of propyzamide and oxyfluorfen. Wherein, the propyzamide and oxyfluorfen have better synergistic effect when the weight ratio of the propyzamide to the oxyfluorfen is 1-10: 1-10.
Preferably, the synergistic effect is better when the weight ratio of the propyzamide to the oxyfluorfen is 1-5: 1-5. The weeding composition comprises a medicinal active ingredient and an auxiliary agent, wherein the content of the medicinal active ingredient is 20-60wt%, preferably 30-60wt%, and more preferably 40-60 wt%.
The clodinafop-propargyl and oxyfluorfen are compounded, so that the defects of narrow weeding spectrum, low pesticide effect, easy generation of pesticide resistance and the like of a single medicine active ingredient are overcome. Due to the difference of physicochemical properties of the components in the compound composition, proper auxiliaries and dosage forms are generally required to be selected when the dosage forms are researched so that the auxiliary agents and the dosage forms have good compatibility and can fully exert the synergistic effect. Compatibility means that two or more substances are mixed, and the compatibility is molecular miscibility, i.e., affinity in chemical and physical properties. In order to ensure that the compound composition has good compatibility, fully exerts the synergistic action of the two components and is more convenient to use, the research on proper dosage forms and the selection of proper auxiliary agents are particularly critical according to the characteristics of the components. The oxyfluorfen technical is a red to yellow solid, has higher solubility in an organic solvent, is the most commonly used preparation form at present and is an emulsifiable solution preparation, and the propyzamide technical is colorless crystalline powder, and is the commonly used preparation form at present, namely wettable powder or water dispersible granules. In research, the two are prepared into the suspending agent, which has the defects of high processing difficulty, poor preparation stability, low suspension rate and high foamability, and a large amount of experiments and screens are needed for obtaining the high-quality suspending agent and fully playing the synergistic effect of the effective components.
Furthermore, through a large number of researches and experiments, the invention obtains a suspending agent containing oxyfluorfen and propyzamide. The suspending agent can better play the synergistic effect of the effective components, so that the weed control spectrum and the weeding effect are greatly improved. The suspending agent containing propyzamide and oxyfluorfen consists of active pharmaceutical ingredients and auxiliaries, wherein the auxiliaries comprise: the suspending agent has the advantages of high suspension rate, good heat storage stability, low foamability and the like through the selection of the auxiliary agents, and when the auxiliary agents are optimized, the optimization of the performance of the preparation form and the drug effect exertion of effective components are facilitated, especially the optimized combination of the dispersing agent, the wetting agent and the defoaming agent greatly reduces the processing difficulty of the preparation form, improves the stability of the preparation form, and has better suspension rate, foamability and heat storage stability. Specifically, the suspending agent comprises the following components in percentage by weight: 20-60% of active ingredients of the medicine, 2-5% of dispersing agent, 1-3% of wetting agent, 0.05-0.5% of defoaming agent, 0.1-1% of thickening agent, 1-5% of antifreezing agent and the balance of water to 100%.
Further, in the suspending agent, the dispersing agent is one or more of polyoxyethylene polyoxypropylene ether block copolymer, sodium salt of naphthol sulfonic acid formaldehyde condensate, sodium lauryl polyoxyethylene ether sulfate, sodium methylene dinaphthalene sulfonate, sodium polycarboxylate, sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate and sodium alkyl benzene sulfonate.
Furthermore, in the suspending agent, the wetting agent is one or more of sodium dodecyl sulfate, fatty alcohol sulfate, alkyl naphthalene sulfonate polycondensate and alkylphenol polyoxyethylene ether.
Further, in the suspending agent, the defoaming agent is silicone oil, a higher alcohol fatty acid ester compound and C10-20Saturated fatty acid compound and C8-10One or more of fatty alcohol compounds.
Further, in the suspending agent, the thickening agent is one or more of xanthan gum, magnesium aluminum silicate, organic bentonite and polyvinyl alcohol.
Further, in the suspending agent, the antifreezing agent is one or more of sorbitol, ethylene glycol, propylene glycol and glycerol.
Preferably, the dispersing agent is prepared by mixing the polyoxyethylene polyoxypropylene ether block copolymer and sodium alkyl benzene sulfonate according to the weight ratio of 1-2: 1. The content of the dispersant is preferably 2 to 3%.
Preferably, the wetting agent is prepared by mixing sodium dodecyl sulfate and alkylphenol polyoxyethylene ether according to the weight ratio of 1: 1-3. The content of the wetting agent is preferably 1 to 3%.
Preferably, the defoaming agent is formed by mixing a higher alcohol fatty acid ester compound and silicone oil according to the weight ratio of 1: 1-3. The content of the defoaming agent is preferably 0.2 to 0.4%.
Preferably, the thickening agent is prepared by mixing magnesium aluminum silicate and xanthan gum according to the weight ratio of 1: 1-4. The content of the thickener is preferably 0.3 to 0.5%.
Preferably, the antifreezing agent is prepared by mixing ethylene glycol and sorbitol according to the weight ratio of 1-3: 1. The content of the antifreeze is preferably 3 to 4%.
The invention also provides a preparation method of the suspending agent, which comprises the following steps:
(1) shearing water, a dispersing agent, a wetting agent and a defoaming agent at a high speed, and uniformly mixing;
(2) adding propyzamide and oxyfluorfen into the mixture obtained in the step (1), and sanding the mixture by using a sand mill until the particle size of the product is 3-5 mu m;
(3) and (3) adding a thickening agent into an antifreezing agent, uniformly mixing, adding the thickening agent into the liquid mixture after sanding in the step (2), and carrying out high-speed shearing and uniform mixing to obtain the suspending agent of the weeding composition.
In the above method, the high speed shearing may be selected as desired to achieve uniform mixing of the components.
The weeding effect is greatly improved by compounding the propyzamide and the oxyfluorfen, and particularly the weed prevention and elimination in ginger and garlic fields are greatly improved. The compound composition overcomes the defect of a single medicament, expands the weeding spectrum, slows down the generation of drug resistance and is beneficial to the sustainable development of the environment. Through verification, the weeding composition can prevent and kill annual gramineous weeds and broadleaf weeds such as crabgrass, goosegrass, green bristlegrass, purslane, quinoa, shepherd's purse, chickweed, redroot amaranth, eclipta, acalypha australis, descurainia sophia, hardwood, alopecurus, and the like in ginger and garlic fields, and the using effect of the weeding composition is far better than that of a single medicament.
The invention has the beneficial effects that:
(1) the clodinafop-propargyl and oxyfluorfen are compounded, so that the synergistic effect is good, the drug effect can be improved, the dosage is reduced, the safety to ginger and garlic is improved, the economic cost can be obviously saved, the residual quantity of the drug in agricultural products and the environment is reduced, the service life of the drug is prolonged, and the economic significance, the environmental protection significance and the ecological significance are important.
(2) The two effective components in the weeding composition have different action mechanisms, have excellent coordination and synergism, can delay and overcome the drug resistance of weeds, expand the weeding spectrum, have good killing effect on annual gramineous weeds and broadleaf weeds, and have good application effect in ginger and garlic fields.
(3) According to the invention, through selection and screening of the auxiliary agents, a suspending agent formula is provided, the suspension rate of the obtained suspending agent can reach more than 99%, the foamability can be below 10mL, the residue after pouring can be lower than 1%, and the performance is excellent.
Detailed Description
The present invention is further illustrated by the following specific examples, which are merely illustrative of the present invention so as to enable those skilled in the art to better understand the present invention, but the essence of the present invention is not limited to the following examples.
Unless otherwise specified, the following percentages are by weight.
Example 130% propyzamide Ethoxyfen suspension
The formula is as follows: 5% of propyzamide, 25% of oxyfluorfen, 2% of a dispersant polyoxyethylene polyoxypropylene ether block copolymer, 1% of sodium alkyl benzene sulfonate, 0.5% of wetting agent lauryl sodium sulfate, 1.5% of alkylphenol polyoxyethylene ether, 0.1% of a defoaming agent higher alcohol fatty acid ester compound, 0.3% of silicone oil, 0.2% of thickening agent magnesium aluminum silicate, 0.2% of xanthan gum, 2% of antifreezing agent ethylene glycol, 2% of sorbitol and the balance of water to 100%.
The preparation method comprises the following steps:
(1) shearing the dispersing agent, the wetting agent, the defoaming agent and water in the formula at a high speed, uniformly mixing, then adding propyzamide and oxyfluorfen, and sanding in a sand mill, wherein the particle size of the material needs to be detected frequently during sanding, and the sanding is carried out until the particle size is 3-5 mu m;
(2) adding the thickening agent into the antifreezing agent, uniformly mixing, then adding the mixture of the thickening agent and the antifreezing agent into the liquid mixture after sanding, and uniformly mixing by high-speed shearing to obtain the 30% propyzamide-oxyfluorfen suspending agent product.
Example 244% propyzamide Ethoxyfluorfen suspension
The formula is as follows: 4% of propyzamide, 40% of oxyfluorfen, 1% of dispersant polyoxyethylene polyoxypropylene ether block copolymer, 1% of sodium alkyl benzene sulfonate, 1.5% of wetting agent lauryl sodium sulfate, 1.5% of alkylphenol polyoxyethylene ether, 0.1% of defoamer higher alcohol fatty acid ester compound, 0.1% of silicone oil, 0.1% of thickener magnesium aluminum silicate, 0.2% of xanthan gum, 2% of antifreeze ethylene glycol, 1% of sorbitol and the balance of water to 100%. The preparation method is the same as example 1.
Example 340% propyzamide Ethoxyfen suspension
The formula is as follows: 33.3 percent of propyzamide, 6.7 percent of oxyfluorfen, 2 percent of dispersant polyoxyethylene polyoxypropylene ether block copolymer, 1 percent of sodium alkyl benzene sulfonate, 0.8 percent of wetting agent lauryl sodium sulfate, 1.2 percent of alkylphenol polyoxyethylene ether, 0.18 percent of defoamer higher alcohol fatty acid ester compound, 0.22 percent of silicone oil, 0.08 percent of thickener magnesium aluminum silicate, 0.32 percent of xanthan gum, 2 percent of antifreeze ethylene glycol, 2 percent of sorbitol and water for 100 percent. The preparation method is the same as example 1.
EXAMPLE 455% propyzamide Ethoxyflurane suspension
The formula is as follows: 50% of propyzamide, 5% of oxyfluorfen, 1.8% of a dispersant polyoxyethylene polyoxypropylene ether block copolymer, 1.2% of sodium alkyl benzene sulfonate, 0.6% of wetting agent lauryl sodium sulfate, 1.4% of alkylphenol polyoxyethylene ether, 0.1% of a defoaming agent higher alcohol fatty acid ester compound, 0.3% of silicone oil, 0.1% of thickening agent magnesium aluminum silicate, 0.3% of xanthan gum, 3% of antifreezing agent ethylene glycol, 1% of sorbitol and the balance of water to 100%. The preparation method is the same as example 1.
Example 560% propyzamide Ethoxyfen suspension
The formula is as follows: 30% of propyzamide, 30% of oxyfluorfen, 2% of a dispersant polyoxyethylene polyoxypropylene ether block copolymer, 1% of sodium alkyl benzene sulfonate, 0.5% of wetting agent lauryl sodium sulfate, 1.5% of alkylphenol polyoxyethylene ether, 0.2% of a defoaming agent higher alcohol fatty acid ester compound, 0.2% of silicone oil, 0.2% of thickening agent magnesium aluminum silicate, 0.2% of xanthan gum, 2% of antifreezing agent ethylene glycol, 2% of sorbitol and the balance of water to 100%. The preparation method is the same as example 1.
Example 630% propyzamide oxyfluorfen suspension
The formula is as follows: 5 percent of propyzamide, 25 percent of oxyfluorfen, 1 percent of sodium naphthol sulfonate formaldehyde condensate serving as a dispersant, 1 percent of sodium lauryl polyoxyethylene ether sulfate, 0.6 percent of fatty alcohol sulfate serving as a wetting agent, 0.4 percent of alkyl naphthalene sulfonate polycondensate, 0.1 percent of defoaming agent silicone oil and C10-200.04% of saturated fatty acid compounds, 0.07% of thickening agent organic bentonite, 0.03% of xanthan gum, 1% of antifreezing agent propylene glycol, 1% of sorbitol and the balance of water to 100%. The preparation method is the same as example 1.
Example 744% propyzamide Ethoxyfluorfen suspension
The formula is as follows: 4% of propyzamide, 40% of oxyfluorfen, 3% of dispersant methylene dinaphthyl sodium sulfonate, 2% of polycarboxylic acid sodium salt, 1.6% of wetting agent sodium dodecyl sulfate, and defoaming agent C8-10The preparation method is the same as that of example 1, wherein the fatty alcohol compound is 0.05 percent, the thickening agent is 0.4 percent of organic bentonite, the polyvinyl alcohol is 0.4 percent, the antifreezing agent is 0.5 percent of glycol, the glycerol is 0.5 percent, and the water is added to make up 100 percent.
Example 848% propyzamide Ethoxyfluorfen suspension
The formula is as follows: 40% of propyzamide, 8% of oxyfluorfen, 2% of dispersant alkylphenol polyoxyethylene formaldehyde condensate sulfate, 1% of lauryl alcohol polyoxyethylene sodium sulfate, 1.5% of wetting agent alkylphenol polyoxyethylene ether, 1.5% of alkyl naphthalene sulfonate polycondensate, 0.25% of defoaming agent silicone oil and C10-20The preparation method is the same as that of example 1 except that 0.25% of saturated fatty acid compounds, 0.6% of thickening agent magnesium aluminum silicate, 0.4% of xanthan gum, 2% of antifreezing agent propylene glycol, 2% of ethylene glycol and water are added to make up 100%.
Example 922% Alkyfenacet Ethoxyflurane suspension
The formula is as follows: 20% of propyzamide, 2% of oxyfluorfen, 2% of a dispersant polyoxyethylene polyoxypropylene ether block copolymer, 2% of sodium alkyl benzene sulfonate, 1% of a wetting agent alkylphenol polyoxyethylene ether, 1% of a fatty alcohol sulfate, 0.1% of a defoaming agent higher alcohol fatty acid ester compound, 0.2% of silicone oil, 0.1% of thickening agent magnesium aluminum silicate, 0.2% of xanthan gum, 3% of an antifreezing agent ethylene glycol, the balance of water being 100%, and the balance of water being 100%.
Example 1020% propyzamide Ethoxyfen suspension
The formula is as follows: 10% of propyzamide, 10% of oxyfluorfen, 1% of dispersant polyoxyethylene polyoxypropylene ether block copolymer, 2% of sodium lauryl polyoxyethylene ether sulfate, 1.2% of wetting agent lauryl sodium sulfate, 1% of alkylphenol polyoxyethylene ether, and defoaming agent C8-10Fatty alcohol 0.1%, C10-200.2 percent of saturated fatty acid compounds, 0.8 percent of thickening agent organic bentonite, 2 percent of antifreezing agent propylene glycol, 3 percent of ethylene glycol and the balance of water to 100 percent. The preparation method is the same as example 1.
Comparative example 1
The formula is as follows: 33.3 percent of propyzamide, 6.7 percent of oxyfluorfen, 2 percent of calcium lignosulfonate dispersant, 1 percent of maleic acid-acrylic acid copolymer salt, 0.8 percent of sodium lignosulfonate wetting agent, 1.2 percent of sodium fatty alcohol-polyoxyethylene ether sulfate, 0.4 percent of polyoxypropylene glycerol ether defoaming agent, 0.08 percent of diatomite thickener, 0.32 percent of gelatin, 2 percent of isopropanol as an anti-freezing agent, 2 percent of urea and the balance of water to 100 percent. The preparation method is the same as example 1.
Comparative example 2
The formulation and preparation were the same as in example 3, except that: the content of propyzamide is 38 percent, and the content of oxyfluorfen is 2 percent.
Comparative example 3
The formulation and preparation were the same as in example 2, except that: the content of propyzamide is 2 percent, and the content of oxyfluorfen is 42 percent.
The properties of the products obtained in the above examples and comparative examples were measured and the results are shown in Table 1 below. The suspension rate is detected according to a GB/T14825-2006 pesticide suspension rate measuring method, the pourability is detected according to a GB/T31737-2015 pesticide pourability measuring method, and the lasting foamability is specified according to HG/T2467.5-2003 pesticide suspension agent product standard writing specifications: 4.11 permanent foaming test determination method.
Figure DEST_PATH_IMAGE001
As can be seen from Table 1, the products obtained in the examples of the present invention all had better properties, wherein the products of examples 1-5 were good in quality both before and after heat storage, and the products of examples 6-10 were slightly inferior in quality after heat storage. In addition, the product of comparative example 1 had poor quality before and after heat storage, so it can be seen that the adjuvants and the active ingredients of the drug had to be matched with each other to obtain a suspension with good performance.
The suspending agents prepared in the above examples and comparative examples are subjected to a field efficacy test for preventing and controlling weeds in a ginger field.
The test is carried out in Laiwu city, the soil is loam, land with even and smooth land strength is selected, ginger is planted, and then the test is divided into cells with the area of 40m2. No further herbicide was used during the test and management was carried out as usual locally. The control agent is 50 percent of propargyl metamifop wettable powder and 240g/L of oxyfluorfen emulsifiable concentrate (purchased from the market). The experiment had 4 treatments in total, which were: treatment 1: spraying clear water, and blank control; and (3) treatment 2: examples 1-10 and comparative example suspending agents; and (3) treatment: 50% of propargyl metamifop wettable powder; and (4) treatment: 240g/L oxyfluorfen emulsifiable concentrate.
Wherein, the suspending agent obtained in the examples 1 to 10 and the comparative example is subjected to soil spraying treatment according to the effective component dosage of 600 g/hectare, 50 percent of propyzamide wettable powder is subjected to soil spraying treatment according to the effective component dosage of 1800 g/hectare, and 240g/L of oxyfluorfen emulsifiable solution is subjected to soil spraying treatment according to the effective component dosage of 252 g/hectare.
Spraying soil 1d after sowing rhizoma Zingiberis recens to prevent and kill weeds in rhizoma Zingiberis recens field, wherein the weeds mainly occur in rhizoma Zingiberis recens field and include broad leaf weeds such as Amaranthus retroflexus, eclipta prostrata, herba Acalyphae, and GramineaeWeeds such as large crabgrass, goosegrass herb and green bristlegrass herb. The pesticide is applied for 1 time by a worker-farm-16 knapsack manual sprayer, 750kg of water is added to prepare liquid medicine according to the dosage of the preparation per hectare, and the liquid medicine is uniformly sprayed according to the amount of the liquid medicine in the community. Random block arrangement is adopted, 4 times of repetition are carried out, and the area of a cell is 40m2(4 m.times.10 m). The weather was good during the test, and there was no rain on the day of application.
40 days after application, the effect of each treatment on the weed number/fresh weight control and on ginger safety was investigated.
The drug effect calculation method comprises the following steps:
Figure DEST_PATH_IMAGE002
the control effect results of each treatment agent on weeds in the ginger field 40 days after application are shown in tables 2 and 3:
Figure 295223DEST_PATH_IMAGE003
Figure DEST_PATH_IMAGE004
as can be seen from the test results of the above tables 2 and 3, the propyzamide and oxyfluorfen compound have good control effects on broadleaf weeds and gramineous weeds in the ginger fields, the control effects are superior to those of a control agent, according to the observation of the whole field test process, the ginger grows well within the test dose range, and the pesticide damage phenomenon does not occur in each treatment agent, so that the propyzamide is safe to the ginger. As can be seen from the comparison between examples 2 and 3 and comparative examples 1 to 3, the selection of the auxiliary agent, the effective ingredients of the medicine and the selection of the proportion of the effective ingredients of the medicine all have important influence on the weeding effect.
The suspending agents prepared in the above examples and comparative examples are subjected to field efficacy tests for preventing and controlling weeds in garlic fields.
The test is carried out in Jinxiang county of Shandong province, soil is loam, land with uniform and smooth land strength is selected, garlic is planted, and then the test is divided into districts with the area of 50m2. No further use during the testOther herbicides, management is routinely performed locally. The control agent is 50 percent of propargyl metamifop wettable powder and 240g/L of oxyfluorfen emulsifiable concentrate (purchased from the market). The total number of 4 treatments are respectively as follows: treatment 1: spraying clear water, and blank control; and (3) treatment 2: suspending agents obtained in examples 1 to 10 and comparative example; and (3) treatment: 50% of propargyl metamifop wettable powder; and (4) treatment: 240g/L oxyfluorfen emulsifiable concentrate.
Wherein, the suspending agent obtained in the examples 1 to 10 and the comparative example is subjected to soil spraying treatment according to the effective component dosage of 600 g/hectare, 50 percent of propyzamide wettable powder is subjected to soil spraying treatment according to the effective component dosage of 1800 g/hectare, and 240g/L of oxyfluorfen emulsifiable solution is subjected to soil spraying treatment according to the effective component dosage of 252 g/hectare.
And (3) performing soil spraying treatment 2d after the garlic is planted to prevent and kill weeds in the garlic field, wherein the weeds mainly generated in the garlic field comprise broadleaf weeds such as chickweed, descurainia sophia and shepherd's purse, and grassy weeds such as hardwood, alopecurus, and crab grass. The pesticide is applied for 1 time by a worker-farm-16 knapsack manual sprayer, 750kg of water is added to prepare liquid medicine according to the dosage of the preparation per hectare, and the liquid medicine is uniformly sprayed according to the amount of the liquid medicine in the community. The random block arrangement is adopted, 4 times of repetition are carried out, and the area of a cell is 50m2(5 m.times.10 m). The weather was good during the test, and there was no rain on the day of application.
150 days after the application, the effects of each treatment on the weed plant number/fresh weight control and on the garlic safety were investigated.
The drug effect calculation method comprises the following steps:
Figure 74348DEST_PATH_IMAGE005
the control effect results of the treatment agents on weeds in the garlic field 150 days after application are shown in tables 4 and 5:
Figure DEST_PATH_IMAGE006
Figure DEST_PATH_IMAGE007
as can be seen from the test results of the above tables 4 and 5, the propyzamide and oxyfluorfen compound have good control effects on broad-leaved weeds and grassy weeds in the garlic field, the control effects are superior to those of a control agent, according to the observation of the whole field test process, the garlic grows well within the test dose range, and the pesticide damage phenomenon does not occur in each treatment agent, so that the propyzamide and oxyfluorfen compound is safe to garlic. As can be seen from the comparison between examples 2 and 3 and comparative examples 1 to 3, the selection of the auxiliary agent, the effective ingredients of the medicine and the selection of the proportion of the effective ingredients of the medicine all have important influence on the weeding effect.

Claims (10)

1. A herbicidal composition characterized by: the pharmaceutical active ingredients are propyzamide and oxyfluorfen, and the weight ratio of the propyzamide to the oxyfluorfen is 1-10: 1-10; the formulation is a suspending agent, and the suspending agent consists of a pharmaceutical active ingredient, a dispersing agent, a wetting agent, a defoaming agent, a thickening agent, an antifreezing agent and water; the dispersing agent is formed by mixing polyoxyethylene polyoxypropylene ether segmented copolymer and sodium alkyl benzene sulfonate according to the weight ratio of 1-2: 1; the wetting agent is prepared by mixing sodium dodecyl sulfate and alkylphenol polyoxyethylene ether according to the weight ratio of 1: 1-3; the defoaming agent is formed by mixing a high-carbon alcohol fatty acid ester compound and silicone oil according to the weight ratio of 1: 1-3.
2. A herbicidal composition according to claim 1, characterized in that: the weight ratio of propyzamide to oxyfluorfen is 1-5: 1-5.
3. A herbicidal composition according to claim 1, characterized in that: the content of the active ingredients is 20-60 wt%.
4. A herbicidal composition according to claim 3, characterized in that: the content of the active ingredients is 30-60 wt%.
5. A herbicidal composition according to claim 3, characterized in that: the content of the active ingredients is 40-60 wt%.
6. A herbicidal composition according to claim 1, characterized in that: the suspending agent consists of the following pharmaceutical active ingredients and auxiliary agents in percentage by weight: 20-60% of active pharmaceutical ingredients, 2-5% of dispersing agent, 1-3% of wetting agent, 0.05-0.5% of defoaming agent, 0.1-1% of thickening agent, 1-5% of antifreezing agent and the balance of water to 100%.
7. The herbicidal composition according to claim 6, wherein: the suspending agent consists of the following pharmaceutical active ingredients and auxiliary agents in percentage by weight: 20-60% of active pharmaceutical ingredients, 2-3% of dispersing agents, 1-3% of wetting agents, 0.2-0.4% of defoaming agents, 0.3-0.5% of thickening agents, 3-4% of antifreezing agents and the balance of water to 100%.
8. A herbicidal composition according to any one of claims 1 to 7, characterized in that: the thickening agent is one or more of xanthan gum, magnesium aluminum silicate, organic bentonite and polyvinyl alcohol; the antifreezing agent is one or more of sorbitol, ethylene glycol, propylene glycol and glycerol.
9. A herbicidal composition according to claim 8, characterized in that: the thickening agent is formed by mixing magnesium aluminum silicate and xanthan gum according to the weight ratio of 1: 1-4; the antifreezing agent is prepared by mixing ethylene glycol and sorbitol according to the weight ratio of 1-3: 1.
10. Use of a herbicidal composition according to any one of claims 1 to 9 for controlling ginger, garlic field annual grassy weeds and broadleaf weeds.
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