CN104996447A - Pesticide composition containing halosulfuron-methyl and fluroxypyr and its use in prevention and control of lemnaceae plants - Google Patents

Abstract

The invention discloses a pesticide composition containing chlorpyrazosulfuron and fluroxypyr and its application in the control of duckweed plants. The active ingredients of the pesticide composition are chlorpyrazosulfuron and chlorofluroxy The mass ratio of pyroxyacetic acid, clopyrazosulfuron and fluroxypyr is 0.2-10:1-50. The pesticide composition shows obvious synergistic effect within the above-mentioned proportioning range, reduces the dosage of pesticides, reduces the frequency of medication, reduces the cost of pesticides, and reduces the adverse effects of pesticides on the ecological environment; expands the weeding spectrum , one-time application not only solves the hazards of various duckweed plants, but also makes up for the defects and limitations of single-dose use; prolonging the service life of the agent is of great significance to the comprehensive management of weed resistance; It has a long effective period and low use cost, and can be used for controlling duckweed plants.

Description

A pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr and its application in controlling duckweed plants

technical field

The invention belongs to the technical field of pesticides, and in particular relates to a pesticide composition containing pyrazosulfuron-methyl and fluroxypyr for controlling duckweed plants.

Background technique

In recent years, with the sustained and rapid development of the national economy, the environmental pollution of water areas has become increasingly serious, and the occurrence and spread of duckweed plants has accelerated. In some areas, rivers, lakes, and reservoirs have been flooded with duckweed, seriously endangering the ecological balance. The growth of duckweed needs to consume nutrients such as nitrogen and phosphorus in the water body, and a small amount of duckweed can purify water quality. However, if it grows wildly in a large area, it will cause serious pollution to the water body. The main hazards of duckweed involve: 1. Pollution of water quality, threatening the safety of drinking water; 2. Covering waterways, hindering navigation, and affecting shipping safety; 3. Pollution of water bodies, affecting the healthy development of aquaculture; 4. Pollution of water quality, breeding of germs; 5. . Destruction of the ecological balance of water bodies. At present, there are reports of large-scale flooding of duckweed in different regions of the country, and its prevention and control mainly focuses on manual salvage. The cost is high, the efficiency is low, and the control effect is not obvious. prevention methods. Duckweed covers the river, blocks sunlight and makes the water turbid, a large amount of organic matter reacts chemically, increases toxic bacteria, reduces the oxygen content of the water, harms aquatic organisms such as fish and shrimp, and seriously damages the ecological environment of the river.

Clopyrazosulfuron-methyl, chemical name: clopyrazosulfuron-methyl; 3-(4,6-dimethoxypyrimidin-2-yl)-1-(1-methyl-3-chloro-4-methoxy Formylpyrazol-5-yl)sulfonylurea. It is a sulfonylurea herbicide and is an inhibitor of acetolactate synthase (ALS enzyme). By inhibiting the ALS enzyme of plants, it prevents the biosynthesis of branched-chain amino acids such as valine, isoleucine, and leucine, and finally destroys protein synthesis, interferes with DNA synthesis, and cell division and growth. It can be absorbed through the roots, stems and leaves of plants. Symptoms of weed phytotoxicity include growth arrest, chlorosis, apical meristem death, and plant death after 2 to 3 weeks. It has a wide range of applications and can effectively control broad-leaved weeds and sedge weeds.

Fluoropyroxyacetic acid, chemical name: 4-amino-3.5-dichloro-6-fluoro-pyridine-2-pyridineoxyacetic acid 1-methyl-heptyl ester. It is a pyridine herbicide and is a systemic conduction type post-emergence herbicide. After the drug is absorbed by the plants quickly, the sensitive plants will be deformed and distorted in response to typical hormone herbicides. It is suitable for controlling broad-leaved weeds in wheat, barley, corn, grapes, orchards, pastures, woodlands, lawns, etc.

Contents of the invention

Purpose of the invention: To solve the problem of lack of effective prevention and control methods in the prior art and in waters such as lakes and rivers where duckweed plants grow wildly in a large area. The object of the present invention is to provide a pesticide composition containing pyrazosulfuron-methyl and fluroxypyr, which has high efficiency, broad spectrum, and environmental friendliness, and is beneficial to the comprehensive management of water body ecological balance and duckweed in lakes and rivers. The characteristics of integrated control of plants. Another object of the present invention is to provide an application of the above-mentioned pesticide composition of chlorpyrazosulfuron-methyl and fluroxypyr.

Technical solution: In order to realize the above-mentioned purpose of the invention, the technical solution adopted in the present invention is:

A pesticide composition containing clopyrazosulfuron-methyl and clofluroxyacetic acid, the active ingredients are clopyrazosulfuron-methyl and clofluroxy-methyl acetic acid, and the mass ratio of clopyrazosulfuron-methyl to clofluroxypyr is 0.2 -10: 1-50.

The preferred mass ratio of clopyrazosulfuron-methyl to fluorazol-pyroxyacetic acid is 1:2, 1.5:3, 2:2, 2:3 or 3:1.

A pesticide preparation containing chlorpyrazosulfuron-methyl and fluroxypyr, which is prepared from a pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr and acceptable auxiliary materials in the field of pesticide preparations. Any acceptable dosage form.

The dosage form of the pesticide preparation is wettable powder, water dispersible granule, suspension or oil suspension.

The three herbicidal active ingredients in the pesticide preparation account for 1-90% of the total weight of the pesticide preparation.

The auxiliary material is selected from wetting agent, dispersant, spreading agent, stabilizer, penetrating agent, thickener, antifreeze agent, defoamer, filler, solvent; wherein, the wetting agent is dodecylbenzene Sodium sulfonate, calcium dodecylbenzenesulfonate, sodium lauryl sulfate, lignosulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, fatty alcohol sulfate, phenylethylphenol polyoxyethylene ether, One or more of nonylphenol polyoxyethylene ethers; the dispersant is lignosulfonate, alkylbenzenesulfonate, alkylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, One or more of alkyl ethyl sulfonate, alkyl naphthalene sulfonate formaldehyde condensate and polycarboxylate; the stabilizer is epoxidized vegetable oil such as epoxidized soybean oil, epoxidized One or more of linseed oil; the spreading agent is one or more of polyvinyl alcohol, sodium alkyl diphenyl ether disulfonate, polytrisiloxane, triethanolamine oleate; the The solvent is one or more of soybean oil, methyl oleate, white oil, turpentine methylnaphthalene higher aliphatic hydrocarbon oil; the filler is white carbon black, corn starch, kaolin, diatomaceous earth, sodium sulfate, sulfuric acid One or more of ammonium.

The application of the pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr for preventing and treating duckweed plants. When controlling duckweed plants, the leafy bodies of duckweed plants are unfolded and used.

The application of the pesticide preparation containing chlorpyrazosulfuron-methyl and fluroxypyr for preventing and treating duckweed plants. When controlling duckweed plants, use after the leaflets of duckweed plants unfold.

The production techniques of various application dosage forms of the pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr all belong to the existing known technology.

The pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr and the pesticide preparation thereof provided by the present invention are usually used by spraying, and other agricultural application techniques can also be used as required.

Beneficial effects: Compared with the prior art, the pesticide composition containing pyrazosulfuron-methyl and fluroxypyr of the present invention has the following advantages:

1) The pesticide composition containing pyrazosulfuron-methyl and fluroxypyracetic acid of the present invention shows obvious synergistic effect within a certain proportion range, and the control effect of the composition has been significantly improved compared with a single agent, reducing Reduce the dosage of pesticides, reduce the frequency of medication, reduce the cost of pesticides, and reduce the adverse effects of pesticides on the ecological environment.

2) The pesticide composition containing pyrazosulfuron-methyl and fluroxypyr of the present invention, the combination of the two active ingredients, expands the weeding spectrum, solves the hazards of various duckweed plants with one dose, and makes up for the single Deficiencies and limitations in the use of agents.

3) The pesticide composition containing pyrazosulfuron-methyl and fluroxypyracetic acid of the present invention has different mechanisms of action of active ingredients, can overcome the shortcoming that long-term single use is easy to produce resistance, prolong the service life of the medicament, and prevent miscellaneous Comprehensive management of grass resistance is of great significance.

4) The pesticide composition containing pyrazosulfuron-methyl and fluroxypyr of the present invention has rapid drug effect, long-lasting effect, low use cost, convenient use, time-saving and labor-saving, and its popularization and application has huge economic benefits. benefits and social benefits.

specific implementation plan

The present invention will be further described below in conjunction with specific examples. The following descriptions are only preferred embodiments of the present invention, and are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

In the following examples, unless otherwise specified, all percentages are percentages by weight.

Embodiment 1: 9.6% clopyrazosulfuron · fluroxypyr acetic acid oil suspension concentrate

The components of the pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr are: 0.6% clopyrazosulfuron-methyl, 9% fluroxypyr-methyl, 5% phenethylphenol polyoxyethylene ether, wood Sodium sulfonate 8%, epoxy soybean oil 5%, organic bentonite 5%, methyl oleate to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and the filler, add other above-mentioned materials (except organic bentonite) into the reactor mixer together, stir evenly, inject the materials into a multi-stage sand mill for grinding, and the ground materials are fine 98% pass through 1-5um and discharge the material. The material is put into a high-shear emulsification kettle together with the pre-dissolved organic bentonite. After emulsification, 9.6% chlorpyrazosulfuron-fluroxypyr acetic acid oil can be made suspending agent.

Embodiment 2: 20% Clopyrazosulfuron-fluroxypyr Suspending Concentrate

The components of the pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr are: clopyrazosulfuron 2%, fluroxypyr 18%, phenethylphenol polyoxyethylene ether 5%, wood Sodium sulfonate 8%, ethylene glycol 5%, magnesium aluminum silicate 2%, defoamer 0.5%, preservative 0.1%, xanthan gum 0.1%, water to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and the filler, add the other above-mentioned materials (except xanthan gum) into the reaction kettle mixer, stir evenly, inject the materials into the multi-stage sand mill for grinding, and the ground materials Fineness of 98% passes through 1-5um, and the material is discharged. The material is put into a high-shear emulsification kettle together with the pre-dissolved xanthan gum. After emulsification, it can be made into 20% chlorpyrazosulfuron-chlorfluroxy Acetic acid suspending agent.

Example 3: 25% clopyrazosulfuron-fluroxypyr wettable powder

The components of the pesticide composition containing clopyrazosulfuron-methyl and clofluroxyacetic acid are as follows: 1% clopyrazosulfuron-methyl, 24% clofensulfuron-methyl, 3% sodium butyl naphthalene sulfonate, lignin sulfonate Calcium acid 5%, white carbon black 5%, kaolin to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and filler, put it into the conical mixer together with other above-mentioned materials and mix evenly, and then pulverize through the jet mill, and then mix the pulverized materials through the conical mixer, and the mixed materials are fine The 25% chlorpyrazosulfuron-fluroxypyr wettable powder can be obtained by passing through a 325-mesh standard sieve with a degree of 98%.

Example 4: 75% clopyrazosulfuron-fluroxyfen water dispersible granules

The components of the pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr are: 5% clopyrazosulfuron-methyl, 70% fluroxypyr-methyl, 5% carboxylate, 10% urea, plus Kaolin to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and filler, put it into the conical mixer together with other above-mentioned materials and mix evenly, and then pulverize through the jet mill, and then mix the pulverized materials through the conical mixer, and the mixed materials are fine 98% pass through a 325-mesh standard sieve, put into a kneader and knead into a plastic material, and finally put this material into an extrusion granulator to extrude and granulate, after granulation, dry and sieve to obtain 75% chloropyrrole rimsulfuron-clofluroxyacetic acid water dispersible granules.

Embodiment 5: 20% clopyrazosulfuron-fluroxypyroxyacetic acid oil suspension concentrate

The components of the pesticide composition containing clopyrazosulfuron and fluroxypyr are: 4% clopyrazosulfuron, 16% fluroxypyr, 2% sodium lauryl sulfate, butyl naphthalene Sodium sulfonate 3%, calcium lignosulfonate 5%, white carbon black 5%, kaolin to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and the filler, add other above-mentioned materials (except organic bentonite) into the reactor mixer together, stir evenly, inject the materials into a multi-stage sand mill for grinding, and the ground materials are fine 98% pass through 1-5um and discharge the material. The material is put into a high-shear emulsification kettle together with the pre-dissolved organic bentonite. After emulsification, 20% chlorpyrazosulfuron-fluroxypyr acetic acid oil can be made suspending agent.

Example 6: 30% Clopyrazosulfuron-fluroxypyr Suspending Concentrate

The components of the pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr are: 10% clopyrazosulfuron-methyl, 20% fluroxypyr-methyl, 5% phenethylphenol polyoxyethylene ether, wood Sodium sulfonate 8%, ethylene glycol 5%, magnesium aluminum silicate 2%, defoamer 0.5%, preservative 0.1%, xanthan gum 0.1%, water to 100%.

After adsorption and mixing of clopyrazosulfuron-methyl and the filler, add the other above-mentioned materials (except xanthan gum) into the reaction kettle mixer, stir evenly, inject the materials into the multi-stage sand mill for grinding, and the ground materials Fineness of 98% passes through 1-5um, and the material is discharged. The material is put into a high-shear emulsification kettle together with the pre-dissolved xanthan gum. After emulsification, it can be made into 30% chlorpyrazosulfuron-chlorfluroxy Acetic acid suspending agent.

Example 7 Screening of the optimal ratio of clopyrazosulfuron-methyl and fluroxypyr

In order to further understand the joint effect of the mixture of chlorpyrazosulfuron-methyl and fluroxyfen on duckweed plants, the inventors conducted a formula screening test on the mixture of clopyrazosulfuron-methyl and fluroxypyr.

Test materials: Ziping (Spirodela polyrhizaL), Qingping (Lemna minor), salvaged from the river in Jiangyan District, Taizhou City, Jiangsu Province in June 2014.

Test equipment: PWT-510 spray tower, Mettler AB135-S electronic balance, volumetric flask, triangular flask, beaker, measuring cylinder, plastic bowl, pipette, ruler, scissors, etc.

Test method: first weigh a certain quality of chlorpyrazosulfuron-methyl and fluroxypyr acetic acid technical materials, add methanol to fully dissolve and then dilute with 0.1% Tween 80 aqueous solution to prepare a single-dose mother solution, and set up a series of mixtures according to the mixing purpose Proportioning, 5-7 concentration gradients are set for each proportioning. Fill a plastic bowl (15cm×11cm×7cm) with water, select healthy Ziping and Qingping, rinse with tap water to remove dirt and impurities, weigh 5g (100% surface coverage) and put it into the plastic bowl. After the spray treatment, put them into a ^300m2 solar greenhouse in the Jiangsu Academy of Agricultural Sciences for cultivation, and replenish water every day.

Regularly observe the growth of Ziping and Qingping after the medicine. 30 days after application, the fresh weight of Ziping and Qingping were investigated, and the inhibition rate of fresh weight was calculated, that is, the control effect on the target plants. DPS data processing system was used to obtain the toxicity regression equation of single dose and 9 binary mixtures, and calculate ED ₅₀ value and 95% confidence limit. The co-toxicity coefficient was calculated by Sun Yunpei method. A co-toxicity coefficient greater than 120 represents a synergistic effect, less than 80 represents an antagonistic effect, and between 80 and 120 represents an additive effect.

Test results: after treatment for 20 days, chlorpyrazosulfuron-methyl and fluroxypyr were mixed and applied at a ratio of 0.2-10:1-50. The inhibitory effect of Qingping increases with the increase of the concentration of the drug, and it has high biological activity to Ziping and Qingping.

30 days after drug administration, the nine binary mixed combinations of chlorpyrazosulfuron-methyl and fluroxypyr had obvious inhibitory effects on the fresh weight of Duckweed plants (Table 1). The co-toxicity coefficients of 0.2:1, 0.2:50, 1:2, 1.5:3, 2:2, 2:3, 3:1, 50:0.2 and 50:10 were 195.8758, 158.5358, 164.4777, 179.5679, 161.6203, 184.8410, 165.1351, 168.0265, 177.2255, the co-toxicity coefficient is greater than 120, showing a synergistic effect.

Table 1 Combined effect of chlorpyrazosulfuron-chlorfluroxyacetic acid mixed with Ziping and Qingping fresh weight

Clopyrazosulfuron has a good inhibitory effect on a variety of broad-leaved weeds, and fluroxypyr has a good inhibitory effect on a variety of broad-leaved weeds. The mixture of the two can simultaneously control a variety of duckweeds weeds. Clopyrazosulfuron-methyl and fluroxypyr are mixed at a ratio of 0.2-10:1-50, showing a synergistic effect.

Embodiment 8 field efficacy test

Test agent: choose the mixed herbicides prepared in Examples 1-4.

Control drug: 75% clopyrazosulfuron-methyl WDG (commercially available)

20% fluroxypyr EC (commercially available)

set blank control

How to use: Use spray method.

Spraying time: On June 25, 2014, pesticides were applied in rivers covered with Ziping, Qingping and Wuping in Jiangyan District, Taizhou City, Jiangsu Province.

Investigation objects and methods: Ziping, Qingping and Wuping, the control effect on duckweed plants was visually observed 20 days after application.

The test results and analysis are shown in Table 2, respectively.

Table 2 field efficacy test results (20d after medicine)

treatment agent Dosage (g/mu) Anti-efficacy (%) Example 1 50 95.44 Example 2 20 96.43

Example 3 30 94.59 Example 4 10 96.55 75% Clorazosulfuron-methyl WDG 5 67.22 20% Fluroxypyr EC 48 60.37

As can be seen from Table 2, the present invention has obvious effects on Ziping, Qingping and Wuping, and the control effect is higher than that of a single agent, and has better quick-acting and sustained-acting properties.

Example 9

With reference to the method of Example 8, field efficacy tests were carried out on the mixed herbicides prepared in Examples 5-8, and it was confirmed that each mixed herbicide has obvious synergistic effect, and has a significant effect on the control effect of Duckweed weeds. Preventive effect, the effect is significantly better than that of a single dose, and the duration of effect is long.

Claims (10)

1. A pesticide composition containing clopyrazosulfuron-methyl and fluroxypyr, characterized in that: the active ingredients are clopyrazosulfuron-methyl and fluroxypyr, and clopyrazosulfuron-methyl and fluroxypyr The mass ratio of acetic acid is 0.2-10:1-50. 2. A pesticide preparation of chlorpyrazosulfuron-methyl and fluroxypyr, characterized in that: the preparation is composed of the pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr according to claim 1 and The excipients acceptable in the field of pesticide preparations are formulated into any dosage form acceptable in pesticides. 3. the pesticide preparation of chlorpyrazosulfuron-methyl and fluroxypyr according to claim 2, is characterized in that: the dosage form of described pesticide preparation is wettable powder, water dispersible granule, suspending agent, microemulsion, Oil, suspoemulsion, emulsifiable concentrate, water dispersible granule, water emulsion or oil suspension. 4. The pesticide preparation containing chlorpyrazosulfuron-methyl and fluroxypyr according to claim 2, characterized in that: the active ingredient in the preparation accounts for 1-90% of the weight of the preparation. 5. the pesticide preparation of chlorpyrazosulfuron-methyl and fluroxypyr according to claim 2, is characterized in that: said adjuvant is selected from the group consisting of wetting agent, dispersant, spreading agent, stabilizer, penetrating agent, Thickener, antifreeze, defoamer, filler, solvent; wherein, the wetting agent is sodium dodecylbenzenesulfonate, calcium dodecylbenzenesulfonate, sodium dodecylsulfate, lignin One or more of sulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, fatty alcohol sulfate, styrene ethylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether; the dispersant is wood Sulfonate, alkylbenzenesulfonate, alkylphenol ethoxylate, nonylphenol ethoxylate, alkylethylsulfonate, alkylnaphthalenesulfonate formaldehyde condensate and polycarboxylate One or several kinds; the stabilizer is one or more of epoxidized vegetable oil such as epoxidized soybean oil, epoxidized linseed oil; the spreader is polyvinyl alcohol, alkyl One or more of sodium diphenyl ether disulfonate, polytrisiloxane, triethanolamine oleate; the solvent is soybean oil, methyl oleate, white oil, turpentine methylnaphthalene high-level aliphatic hydrocarbon oil One or more; the filler is one or more of white carbon black, corn starch, kaolin, diatomaceous earth, sodium sulfate, ammonium sulfate. 6. The application of the pesticide composition containing pyrazosulfuron-methyl and fluroxyrpyr according to claim 1 in the prevention and treatment of Duckweed plants. 7. The application according to claim 6, characterized in that: when controlling Duckweed plants, use after the Duckweed plants fronds unfold. 8. The application of the pesticide preparation containing chlorpyrazosulfuron-methyl and fluroxyfen according to any one of claims 2-5 in the prevention and treatment of Duckweed plants. 9 . The application according to claim 8 , characterized in that: when controlling Duckweed plants, use them after the Duckweed plants fronds unfold. 10. The pesticide composition containing chlorpyrazosulfuron-methyl and fluroxypyr according to claim 1, characterized in that: the mass ratio of clopyrazosulfuron-methyl and fluroxypyr is 1:2 , 1.5:3, 2:2, 2:3 or 3:1.