CN110856492A - Herbicidal composition and use thereof - Google Patents

Herbicidal composition and use thereof Download PDF

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Publication number
CN110856492A
CN110856492A CN201910784546.3A CN201910784546A CN110856492A CN 110856492 A CN110856492 A CN 110856492A CN 201910784546 A CN201910784546 A CN 201910784546A CN 110856492 A CN110856492 A CN 110856492A
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herbicidal composition
active ingredient
ammonium
glufosinate
composition according
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罗小娟
左元明
李双阳
黄超
苟骄
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Sichuan Lier Crop Science Co Ltd
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Sichuan Lier Crop Science 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
    • A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
    • A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
    • A01N57/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing acyclic or cycloaliphatic radicals
    • 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
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
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  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a weeding composition and application thereof. The weeding composition comprises an active ingredient A and an active ingredient B. The active ingredient A is glufosinate-ammonium, and the active ingredient B comprises one or more of sulfonylurea herbicides. The weight ratio of the active ingredient A to the active ingredient B is 75: 1-1: 30. The herbicidal composition can be used for controlling grassy weeds, broadleaf weeds and sedge weeds. By compounding various active ingredients, the herbicide composition can expand a weed control spectrum, reduce or eliminate high-temperature phytotoxicity and reduce the sensitivity in rainy days.

Description

Herbicidal composition and use thereof
Technical Field
The invention relates to a weeding composition, in particular to a weeding composition containing glufosinate-ammonium and application thereof in agriculture.
Background
The chemical name of the refined glufosinate-ammonium is 4- [ hydroxy (methyl) phosphonyl]L-homoalanine, readily soluble in water, poorly soluble in organic solvents, stable to light, melting point 214-216 ℃ and the formula: c5H12NO4P; molecular weight: 181.1, respectively; the structural formula is as follows:
the glufosinate-ammonium belongs to a non-conductive contact herbicide, and is used for preventing and controlling weeds by inhibiting glutamine synthetase, so that the metabolic disturbance of nitrogen in a plant body and the cumulative poisoning of nitrogen are caused, the synthesis and photosynthesis of chloroplast are hindered, and finally the plant is dead. The refined glufosinate-ammonium has the advantages of low toxicity, high safety, wide weeding spectrum, high activity, high weeding speed and the like. In addition, the refined glufosinate-ammonium has good water solubility and is convenient to process and mix for use.
Nicosulfuron (Nicosulfuron, 2- (4, 6-dimethoxypyrimidine-2-pyrimidylaminocarbamoylsulfamoyl) -N, N-dimethylnicotinamide) is a sulfonylurea herbicide with the following chemical structural formula:
Figure BDA0002177620920000012
nicosulfuron is a high-efficiency herbicide for corn, and can effectively prevent and kill various annual gramineous weeds, broadleaf weeds and cyperaceae weeds in corn fields after being used after low-dose germination. It is rapidly absorbed by leaves and roots and rapidly conducted through xylem and phloem. The synthesis of branched-chain amino acids is prevented by acetolactate synthase. Immediately after application, the weeds stop growing, the new leaves fade and die 4-5 days later, and gradually spread to the whole plant, and the plant dies 20-25 days later under the common conditions. The nicosulfuron is mainly used for weeding in corn fields, has good control effect on gramineous weeds and partial broad-leaved weeds, has medium control effect on nutgrass flatsedge, and has poor control effect on partial broad-leaved weeds.
Halosulfuron-methyl (Halosulfuron methyl, 3- (4, 6-dimethoxypyrimidin-2-yl) -1- (1-methyl-3-chloro-4-methoxyformylpyrazol-5-yl) sulfonylurea) is a sulfonylurea herbicide, and its chemical structural formula is as follows:
Figure BDA0002177620920000021
the halosulfuron-methyl can inhibit the biosynthesis of branched chain amino acids leucine, isoleucine and valine in plants, so that the growth of plant root systems is inhibited, and the trend of bioassay results of the inhibition effect on the main root length of plants such as corn, pot culture and rice is basically consistent. When the root system of the plant is inhibited by halosulfuron-methyl, the phytotoxicity symptom is also most obvious; on the contrary, the variety with the plant root length inhibited less has strong growth, no obvious phytotoxicity symptom, low plant height inhibition rate, different synthesis capacities of the branched chain amino acids leucine, isoleucine and valine in different plants, namely different drug resistance, so that the halosulfuron-methyl utilizes the characteristic to weed, and the proper amount of the halosulfuron-methyl basically has no influence or little influence on wheat, corn, rice and sugarcane, but can greatly inhibit the biosynthesis of the branched chain amino acids leucine, isoleucine and valine in weeds. Halosulfuron-methyl is mainly used for preventing and killing broad leaf weeds and cyperaceae weeds, such as Bing ear, stramonium, ragweed, amaranthus retroflexus, field watermelon seedlings, polygonum, purslane, black nightshade, cassia tora, morning glory, cyperus rotundus and the like.
Rimsulfuron (Rimsulfuron, 1- (4, 6-dimethoxypyrimidin-2-yl) -3- (3-ethylsulfonyl-2-pyridylsulfonyl) urea) is a sulfonylurea herbicide having the following chemical formula:
Figure BDA0002177620920000022
rimsulfuron is a branched chain amino acid synthesis inhibitor, a selective post-emergence herbicide. Is used for preventing and killing annual or perennial gramineous and broadleaf weeds in corn fields, such as field thistle, cardamine, cyperus rotundus, rumex crispa, sorghum arabicum, wild oat, hemostatic crabgrass, cockspur grass, lolium multiflorum, abutilon, amaranthus retroflexus, cleavers, corn poppy and chickweed.
However, long-term use of a single herbicide of glufosinate-ammonium or sulfonylurea easily causes drug resistance, so that the dosage is increased, the environmental impact is increased, the control effect is reduced, and the drug cost is increased.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a herbicidal composition, which can expand the herbicidal spectrum, reduce or eliminate the high temperature phytotoxicity, and reduce the sensitivity in rainy days by using glufosinate-ammonium as one of the active ingredients and compounding with sulfonylurea herbicides.
According to one aspect, the invention provides a weeding composition, which comprises an active ingredient A and an active ingredient B, wherein the active ingredient A is glufosinate-ammonium, the active ingredient B comprises one or more sulfonylurea herbicides, and the weight ratio of the active ingredient A to the active ingredient B is 75: 1-1: 30.
Preferably, the sulfonylurea herbicide is selected from nicosulfuron, halosulfuron-methyl and rimsulfuron.
The weight percentage of the active ingredient A and the active ingredient B is 3-47% based on the total weight of the weeding composition.
According to a specific embodiment, the effective amount of the herbicidal composition is 30 to 185g (a.i.)/ha.
According to another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 1-20% of refined glufosinate-ammonium, 0.1-8% of sulfonylurea herbicide and 3-27% of compound additive.
According to a specific embodiment, the herbicidal composition further comprises 2 to 15% of a safener, based on the total weight of the herbicidal composition. Preferably, the safener is a sulfonylurea safener.
According to another specific embodiment, the composite auxiliary comprises castor oil polyoxyethylene ether and polyoxyethylene-polyoxypropylene block polyether in a weight ratio of 12: 1-1: 5.
Optionally, the formulation of the herbicidal composition is selected from the group consisting of wettable powder, granules, microemulsions, aqueous emulsions, oil suspensions and aqueous suspensions.
According to another aspect of the present invention, the present invention also provides use of the herbicidal composition for controlling weeds.
The weeding composition contains the glufosinate-ammonium, and has the following advantages by being matched with the sulfonylurea herbicide, the safener and the compound auxiliary agent optionally: the high efficiency and excellent water solubility of the refined glufosinate-ammonium are fully utilized, so that the use dosage of the pesticide preparation is reduced, and the use of an organic solvent is reduced or even avoided; the selectivity of the sulfonylurea herbicide is utilized to enhance the selectivity of the sulfonylurea herbicide to grassy weeds, broad-leaved weeds and cyperaceae weeds; the safety agent is utilized to reduce or eliminate high-temperature phytotoxicity, and the mutual synergistic effect of the refined glufosinate-ammonium, the sulfonylurea herbicide, the safety agent and the compound auxiliary agent is utilized to effectively form a pesticide film on the surface of the plant, so that the rain erosion can be better resisted, the herbicidal activity of the refined glufosinate-ammonium and the sulfonylurea herbicide is more fully exerted, the herbicidal activity of the compound herbicidal composition is further improved, the high-temperature phytotoxicity is reduced or eliminated, and the sensitivity in rainy weather is reduced.
Therefore, the weeding composition has more remarkable synergistic effect compared with the single use of the glufosinate-ammonium and the sulfonylurea herbicide. In particular, the herbicidal compositions according to the invention are particularly suitable for controlling grassy, broad-leaved and sedge weeds, such as amaranth, pinus massoniana, acalypha australis, goosegrass, barnyard grass, green bristlegrass, crabgrass, cyperus rotundus and the like.
Detailed Description
The weeding composition comprises an active ingredient A and an active ingredient B, wherein the active ingredient A is glufosinate-ammonium, and the active ingredient B comprises one or more sulfonylurea herbicides.
The sulfonylurea herbicide is one or more selected from nicosulfuron, halosulfuron-methyl and rimsulfuron.
Wherein the weight ratio of the active ingredient A to the active ingredient B can be 75: 1-1: 30, preferably 70: 1-1: 20, more preferably 65: 1-1: 10, most preferably 50: 1-1: 5, and can be 1:1, 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1, 40:1, 45:1, 55:1, for example.
According to a specific embodiment, the above herbicidal composition further comprises a complex adjuvant. The herbicidal composition comprising, based on the total weight of the herbicidal composition: 1-20% (preferably 5-15%, more preferably 7-10%) of glufosinate-ammonium, 0.1-8% (preferably 0.5-6%, more preferably 1-5%, such as 3%, 4%) of sulfonylurea herbicide, and 3-27% (preferably 5-25%, more preferably 7-20%, such as 10%, 15%) of compound additive. For example, the compounding aid may be a combination of castor oil polyoxyethylene ether and polyoxyethylene-polyoxypropylene (EO-PO) block polyether in a weight ratio of 12:1 to 1:5 (e.g., 5:1 to 1:5, preferably 2:1 to 1:3, more preferably 1: 1.5).
The castor oil polyoxyethylene ether may be, for example, castor oil polyoxyethylene ether 40 or castor oil polyoxyethylene ether 80.
The polyoxyethylene-polyoxypropylene block polyether may be, for example, a propylene glycol polyoxyethylene polyoxypropylene ether block polyether, a glycerol polyoxyethylene polyoxypropylene ether block polyether, or an ethylenediamine polyoxyethylene polypropylene block polyether.
The safener may be a sulfonylurea safener, for example a phenylsulfonylurea. Preferably, the safener is present in an amount of 2 to 15%, preferably 2 to 10%, for example 7% by weight of the total herbicidal composition.
Preferably, the herbicidal composition of the present invention may further comprise 1 to 5% by weight of an organic solvent, preferably 1.5 to 3.5%, e.g. 2%, 2.5%.
The organic solvent is selected from butanol, methanol, olaquinamide, S-150# aromatic solvent oil, and cyclohexanone.
Further, the above herbicidal composition may further comprise one or more adjuvants selected from fillers, emulsifiers, thickeners, antifreezes, dispersants, binders, stabilizers and synergists.
The filler used in the present invention may be selected from kaolin, organobentonite, white carbon black, and light calcium carbonate.
The percentage of the active ingredient is 3 to 47%, preferably 5 to 45%, more preferably 10 to 40%, for example 12 to 35%, specifically 15%, 20%, 25%, 30%, etc., based on the total weight of the herbicidal composition.
The dosage form of the weeding composition is selected from wettable powder, granules, suspending agents, microemulsions, aqueous emulsion, oil suspending agents and water suspending agents.
The weeding composition is preferably microemulsion, oil suspending agent or wettable powder, and can be diluted by adding water before use and sprayed on a target to quickly form a medicinal film. The weeding composition provided by the invention is fully contacted with the surface of a plant, so that high-temperature phytotoxicity is reduced or eliminated, and the sensitivity to rainy weather is reduced.
The herbicidal composition is used in an effective amount of 30 to 185g (a.i.)/ha, preferably 40 to 180g (a.i.)/ha, 45 to 160g (a.i.)/ha, more preferably 55 to 150g (a.i.)/ha, most preferably 60 to 125g (a.i.)/ha, for example 75g (a.i.)/ha, 90g (a.i.)/ha, 110g (a.i.)/ha.
The herbicidal compositions according to the present invention may be provided in the form of a finished formulation, i.e. the ingredients of the composition have been mixed, or the ingredients of the composition may be provided in a single dose, mixed directly in a tank or tank prior to use and then diluted to the desired concentration.
In the weeding composition, the molecular structure of the glufosinate-ammonium contains carboxyl, hydroxyl, amino and phosphonyl, and the molecular structure of the sulfonylurea herbicide contains sulfonyl or amido and carbamido, so that the active ingredient and the compound auxiliary agent, namely the castor oil polyoxyethylene ether and a plurality of ether bonds in polyoxyethylene-polyoxypropylene block polyether can form a three-dimensional net hydrogen bond structure, and a medicine film can be formed on the surface of a plant, so that the active ingredient can be better attached to the surface of the plant and penetrate through a wax layer on the epidermis of the plant to be quickly absorbed by the plant, the contact time is prolonged, the medicine effect is improved, and the sensitivity to rainy weather is reduced. And the interaction between the safener and the active ingredient reduces or eliminates high temperature hazard. Because the refined glufosinate-ammonium, the sulfonylurea herbicide, the castor oil polyoxyethylene ether and the polyoxyethylene-polyoxypropylene block polyether have excellent water solubility and biodegradability, the durable and efficient weeding effect can be realized.
The weeding composition can be used for preventing and controlling weeds in cultivated land and non-cultivated land by compounding the refined glufosinate-ammonium and the sulfonylurea herbicide. Especially for gramineous weeds, broad-leaved weeds and sedge weeds, has obviously better control effect under obviously low dosage.
Furthermore, by combining the refined glufosinate-ammonium and the sulfonylurea herbicide with a specific safety agent and a compound additive, the interface characteristic of the drug liquid drop and the surface of the plant is improved, so that the contact time of the plant liquid drop and the plant is prolonged, and the contact area is enlarged. Therefore, the combination of the refined glufosinate-ammonium, the sulfonylurea herbicide, the sulfonylurea safety agent and the compound additive further improves the weeding efficiency of the weeding composition and reduces high-temperature phytotoxicity.
Specific examples will be listed below to representatively illustrate embodiments of the present invention.
The composition of the invention takes the glufosinate-ammonium as an active ingredient (A) and the sulfonylurea herbicide as an active ingredient (B) to form ternary compounding, and has obvious synergistic effect on the prevention and the removal of broadleaf weeds.
Indoor toxicity test
The determination method comprises the following steps:
uniformly dibbling the seeds of the accelerated sprouting amaranthus rugosus and the seeds of the cyperus rotundus in black plastic nutrition cups (the diameter is 20cm) filled with nutrient soil, covering soil with 30 granules in each cup, soaking in water to completely wet the soil, and culturing in a greenhouse. And when the weeds grow to 3-5 leaves, determining 10 plants/cup for later use.
The medicament is completely dissolved by acetone to prepare mother liquor, and the mother liquor is gradually diluted to the required concentration according to the requirement of experimental design dosage.
Spraying stem and leaf. Spraying stem and leaf with raw measuring spray tower, adding water 100ml/m2Droplet diameter 100 μm, nozzle flow 90 mL/min-1And a clear water contrast is set. Weighing the fresh weight of the overground part of weeds 15 days after the treatment, and calculating the fresh weight control effect. Evaluation was performed by the Colby method, and the results were an average of 4 tests.
Specifically, the Colby method is used for evaluating the combined action type of two herbicides, and the theoretical control effect of the mixed herbicide is calculated according to the following formula:
in the formula: 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;
E0the theoretical weed survival rate of the herbicide (A + B) at the dosage of (P + Q);
e is the actual weed survival rate of the herbicide (A + B) at the dosage of (P + Q);
E0-E>10% of the composition is synergistic effect; e0-E<-10% is antagonism; e0An E value of. + -. 10% is additive effect.
Measuring the fresh weight of the overground part, and respectively counting the fresh weight control effect:
the survival rate (%) of the weeds is 100-fresh weight control effect.
The experimental results are shown in table 1 below.
TABLE 1 fresh weight control of weeds with a single active ingredient dose
Figure BDA0002177620920000073
TABLE 2 evaluation of the controlling effect of the compounded reagents in different proportions
Figure BDA0002177620920000081
As can be seen from the data in tables 1 and 2, the fresh weight control effect of the refined glufosinate-ammonium on the amaranthus rugosus and the cyperus rotundus after being compounded with the nicosulfuron, the halosulfuron-methyl and the rimsulfuron is far greater than that of each single agent, and the E in the proportion is far greater than that of each single agent0-E>10 percent of the composition is compounded by the refined glufosinate-ammonium and the nicosulfuron, the halosulfuron-methyl and the rimsulfuron respectivelyHas obvious synergistic effect.
(II) field herbicide efficacy test
Examples
Example 19% (8% glufosinate-ammonium + 1% nicosulfuron) wettable powder
8% of refined glufosinate-ammonium, 1% of nicosulfuron, 406% of castor oil polyoxyethylene ether, 4% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether and the balance of bentonite are stirred and mixed uniformly, and superfine grinding is carried out through an air flow grinder to prepare 9% of refined glufosinate-nicosulfuron wettable powder.
Example 235% (30% glufosinate-ammonium + 5% nicosulfuron) oil suspension
Adding 30% of refined glufosinate-ammonium, 5% of nicosulfuron, 4010% of castor oil polyoxyethylene ether, 4% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 2% of hydroxyethyl cellulose, 2% of organic bentonite and the balance of methyl oleate into a preparation kettle in sequence, uniformly stirring by using high-speed shearing, and then ball-milling until the diameter of particles is less than 5 microns to prepare the 35% refined glufosinate-nicosulfuron oil suspending agent.
Example 320% (refined glufosinate-ammonium 15% + nicosulfuron 5%) aqueous suspension
Adding 15% of refined glufosinate-ammonium, 5% of nicosulfuron, 403% of castor oil polyoxyethylene ether, 6% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 0.2% of xanthan gum, 1.5% of magnesium aluminum silicate, 0.3% of sodium benzoate and deionized water in a preparation kettle in sequence for supplementing residue, uniformly stirring by using high-speed shearing, and then ball-milling until the diameter of particles is less than 5 microns to prepare the 20% refined glufosinate-nicosulfuron water suspending agent.
Example 445% (Glufosinate-ammonium 36% + halosulfuron-methyl 9%) wettable powder
36% of refined glufosinate-ammonium, 9% of halosulfuron-methyl, 4012% of castor oil polyoxyethylene ether, 8% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether and the balance of kaolin are stirred and mixed uniformly, and superfine grinding is carried out through an airflow pulverizer to prepare 45% of refined glufosinate-halosulfuron-methyl wettable powder.
Example 531.5% (glufosinate-ammonium 24.5% + halosulfuron-methyl 7%) oil suspension
Adding 24.5% of refined glufosinate-ammonium, 7% of halosulfuron-methyl, 4016% of castor oil polyoxyethylene ether, 6% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 1% of hydroxyethyl cellulose, 1% of organic bentonite and the balance of methyl oleate into a preparation kettle in sequence, uniformly stirring by using high-speed shearing, and then ball-milling until the diameter of particles is less than 5 microns to prepare the 31.5% of refined glufosinate-ammonium-nicosulfuron oil suspending agent.
Example 636% (32% glufosinate-ammonium + 4% halosulfuron-methyl) aqueous suspension
Adding 32% of glufosinate-ammonium, 4% of halosulfuron-methyl, 406% of castor oil polyoxyethylene ether, 2% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 0.3% of xanthan gum, 1.0% of magnesium aluminum silicate, 0.3% of sodium benzoate and deionized water into a preparation kettle in sequence for supplementing residue, uniformly stirring by using high-speed shearing, and then performing ball milling until the particle diameter is less than 5 microns to prepare the 36% glufosinate-halosulfuron-methyl water suspension.
Example 724% (refined glufosinate-ammonium 21% + rimsulfuron 3%) wettable powder
21% of refined glufosinate-ammonium, 3% of rimsulfuron, 5% of sodium lignosulfonate, 3% of naphthalene sulfonate formaldehyde condensate, 5% of white carbon black and the balance of kaolin are uniformly stirred and mixed, and superfine grinding is carried out through a jet mill to prepare 24% of refined glufosinate-rimsulfuron wettable powder.
Example 845% (Fine Glufosinate-ammonium 40% + rimsulfuron 5%) oil suspension
Adding 40% of refined glufosinate-ammonium, 5% of rimsulfuron, 4014% of castor oil polyoxyethylene ether, 7% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 2% of hydroxyethyl cellulose, 2% of organic bentonite and the balance of methyl oleate into a preparation kettle in sequence, uniformly stirring by using high-speed shearing, and then ball-milling until the diameter of particles is less than 5 microns to prepare the 45% of refined glufosinate-rimsulfuron suspending agent.
Example 915% (Glufosinate-ammonium 14% + rimsulfuron 1%) aqueous suspension
Adding 14% of glufosinate-ammonium, 1% of rimsulfuron, 405% of castor oil polyoxyethylene ether, 3% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether, 0.4% of xanthan gum, 1.5% of magnesium aluminum silicate, 0.3% of sodium benzoate and the balance of deionized water into a preparation kettle in sequence, uniformly stirring by using high-speed shearing, and then ball-milling until the diameter of particles is less than 5 microns to prepare the 15% glufosinate-rimsulfuron water suspending agent.
Example 109% (8% glufosinate-ammonium + 1% nicosulfuron) wettable powder
8% of refined glufosinate-ammonium, 1% of nicosulfuron, 5% of phenylsulfonylurea, 406% of castor oil polyoxyethylene ether, 4% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether and the balance of bentonite are stirred and mixed uniformly, and superfine grinding is carried out through an airflow grinder to prepare 9% of refined glufosinate-nicosulfuron wettable powder.
Example 1145% (refined glufosinate-ammonium 36% + halosulfuron-methyl 9%) wettable powder
36% of refined glufosinate-ammonium, 9% of halosulfuron-methyl, 6% of phenyl sulfonylurea, 8010% of castor oil polyoxyethylene ether, 5% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether and the balance of bentonite are stirred and mixed uniformly, and superfine grinding is carried out by an airflow grinder to prepare 45% of refined glufosinate-halosulfuron-methyl wettable safe powder.
Comparative example 19% (8% of glufosinate-ammonium + 1% of nicosulfuron) wettable powder
8% of refined glufosinate-ammonium, 1% of nicosulfuron, 4010% of castor oil polyoxyethylene ether and the balance of bentonite are uniformly stirred and mixed, and ultramicro crushing is carried out by an airflow crusher to prepare 9% of refined glufosinate-nicosulfuron wettable powder.
Comparative example 29% (8% of glufosinate-ammonium + 1% of nicosulfuron) wettable powder
8% of glufosinate-ammonium, 1% of nicosulfuron, 10% of propylene glycol polyoxyethylene-polyoxypropylene ether block polyether and the balance of bentonite are uniformly stirred and mixed, and superfine grinding is carried out through an airflow grinder to prepare 9% of glufosinate-ammonium-nicosulfuron wettable powder.
The field test method comprises the following steps: the respective agents according to the above examples were accurately weighed according to the area of the test area, diluted in a form suitable for spraying in a predetermined effective amount, and uniformly sprayed. The spray head selects a special fan-shaped spray head for weeding to spray: (1) in the corn field, the temperature for applying the pesticide is 20 ℃, and no wind exists in sunny days; (2) in the corn field, the temperature for applying the pesticide is 20 ℃, and the pesticide is applied in rainy days; (3) in the corn field, the temperature for applying the pesticide is 30 ℃, and no wind exists in sunny days. When spraying, the liquid medicine is uniformly sprayed into a test cell, so that the repeated spraying and the missing spraying are avoided.
After the test is finished, the weed death condition is observed 15 days after the drug is applied, 1 square meter is randomly selected from each test area to carry out weed death rate investigation, and the control effect is calculated respectively.
TABLE 3 field test of efficacy
Note: "maize" is the mortality observed at day 7 after application.
As shown in the test results in Table 3, the results show that after the glufosinate-ammonium is compounded with the nicosulfuron, the halosulfuron-methyl and the rimsulfuron respectively, the control effect 15 days after the application of the composition is obviously improved compared with that of the respective single agents, the control effect on weeds, particularly the control effect on weeds such as amaranthus rugosus and cyperus rotundus is obviously improved, and the weeding selectivity is improved. Therefore, the active ingredients in the compound preparation support each other and have synergistic effect, thereby realizing the obvious technical effects of improving the control effect and expanding the weed control spectrum.
On the other hand, the test results also verify that the compounded reagent according to the embodiments 1 to 12 has the advantages that the control effect of the compounded reagent in rainy weather is remarkably improved by the specific weight ratio of the refined glufosinate ammonium, the nicosulfuron, the halosulfuron-methyl or the rimsulfuron even in rainy weather at 20 ℃ or at high temperature of 30 ℃, and the safety agent phenylsulfonylurea is contained, so that good safety is realized, and the generation of high-temperature phytotoxicity is avoided.
Further, referring to comparative examples 1-2, the combination of refined glufosinate-ammonium, nicosulfuron and castor oil polyoxyethylene ether 40 or propylene glycol polyoxyethylene-polyoxypropylene ether block polyether can effectively reduce the sensitivity of the agent to rainy weather, namely, the agent can still maintain good herbicidal activity and selectivity in rainy weather.

Claims (10)

1. The weeding composition is characterized by comprising an active ingredient A and an active ingredient B, wherein the active ingredient A is glufosinate-ammonium, the active ingredient B comprises one or more sulfonylurea herbicides, and the weight ratio of the active ingredient A to the active ingredient B is 75: 1-1: 30.
2. The herbicidal composition according to claim 1, wherein the sulfonylurea herbicide is selected from nicosulfuron, halosulfuron-methyl and rimsulfuron.
3. A herbicidal composition according to claim 1, wherein the weight percentages of active ingredient a and active ingredient B total 3 to 47%, based on the total weight of the herbicidal composition.
4. A herbicidal composition according to claim 1 or 2, wherein the effective amount of the herbicidal composition is from 30 to 185g (a.i.)/ha.
5. A herbicidal composition according to claim 1 or 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 1-20% of refined glufosinate-ammonium, 0.1-8% of sulfonylurea herbicide and 3-27% of compound additive.
6. A herbicidal composition according to claim 5, wherein the herbicidal composition further comprises 2 to 15% of a safener, based on the total weight of the herbicidal composition.
7. The weeding composition according to claim 5, wherein the composite auxiliary agent comprises castor oil polyoxyethylene ether and polyoxyethylene-polyoxypropylene block polyether in a weight ratio of 12: 1-1: 5.
8. The herbicidal composition of claim 6, wherein the safener is a sulfonylurea safener.
9. The herbicidal composition according to claim 1 or 2, wherein the formulation of the herbicidal composition is selected from the group consisting of wettable powders, granules, microemulsions, aqueous emulsions, oil suspensions and aqueous suspensions.
10. Use of the herbicidal composition according to any one of claims 1 to 9 for controlling weeds.
CN201910784546.3A 2018-08-24 2019-08-23 Herbicidal composition and use thereof Pending CN110856492A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112741102A (en) * 2020-12-30 2021-05-04 浙江新安化工集团股份有限公司 Fine glufosinate-ammonium herbicide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103371173A (en) * 2012-04-21 2013-10-30 陕西韦尔奇作物保护有限公司 Weeding composition containing glufosinate-ammonium and sulfonylurea
CN106332902A (en) * 2015-07-14 2017-01-18 江苏扬农化工股份有限公司 Weeding composition containing glufosinate-ammonium and sulfonylurea herbicides and use thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103371173A (en) * 2012-04-21 2013-10-30 陕西韦尔奇作物保护有限公司 Weeding composition containing glufosinate-ammonium and sulfonylurea
CN106332902A (en) * 2015-07-14 2017-01-18 江苏扬农化工股份有限公司 Weeding composition containing glufosinate-ammonium and sulfonylurea herbicides and use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112741102A (en) * 2020-12-30 2021-05-04 浙江新安化工集团股份有限公司 Fine glufosinate-ammonium herbicide

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