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Composite herbicide containing pyroxasulfone

A technology of compound herbicide, pyraclofenazole, which is applied in the field of pesticides, can solve the problems of weed resistance and other problems, achieve the effects of reducing phytotoxicity, improving the effect of compound weed control and good wettability

Inactive Publication Date: 2021-09-07
安徽喜田生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a compound herbicide containing pyrazafen, to solve the technical problem that long-term use of a compound herbicide with a single active ingredient can easily cause weeds to develop drug resistance

Method used

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  • Composite herbicide containing pyroxasulfone
  • Composite herbicide containing pyroxasulfone
  • Composite herbicide containing pyroxasulfone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Modified dispersants are made by the following steps:

[0044]Step A. Add ethylenediamine and glacial acetic acid into a three-necked flask, stir until the ethylenediamine is completely dissolved, then add 2,2-acrylamido-2-methylpropanesulfonate dropwise, and use tin foil to protect it from light. Under nitrogen protection, the temperature of the reaction system was heated to 77°C with an oil bath, refluxed for 6 hours, and then glacial acetic acid and unreacted small molecules were removed by rotary evaporation under reduced pressure at 45°C to obtain intermediate product 1;

[0045] Step B, add the intermediate product 1, maleic anhydride, and glacial acetic acid obtained in step A into a three-necked flask in sequence, and after stirring evenly, heat the temperature of the reaction system to 75° C. with an oil bath, reflux for 12 hours, and then The reaction solution was rotary evaporated under reduced pressure at 35°C to remove glacial acetic acid and unreacted smal...

Embodiment 2

[0052] The modified dispersant is made through the following steps: with reference to each step in Example 1;

[0053] The amount of raw materials used in each step is shown in Table 2.

[0054] Table 2

[0055]

Embodiment 3

[0057] The adsorbent is modified mesoporous silica and is made by the following steps:

[0058] Step 1. Add cetyltrimethylammonium bromide to the ethanol solution, then stir at room temperature until the cetyltrimethylammonium bromide is completely dissolved, then add ethyl orthosilicate and diethanolamine in sequence, Stir the reaction for 30 hours, centrifuge the product at 5500r / min for 15 minutes, wash it with absolute ethanol three times, dry it in a drying oven for 12 hours, transfer it to a muffle furnace for calcination at a high temperature of 580°C for 7 hours, and obtain mesoporous silica;

[0059] Step 2: Add the mesoporous silica obtained in Step 1 into the ethanol solution, ultrasonically disperse for 45 minutes, then add epoxybutyltrimethoxysilane, stir and react at 63°C for 16 hours, then wash and filter with deionized water, Then, it was dried in a drying oven at 25° C. for 8 hours to obtain modified mesoporous silica.

[0060] The amount of raw materials use...

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PUM

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Abstract

The invention discloses a compound herbicide containing pyroxasulfone, and belongs to the technical field of pesticides. The compound herbicide comprises the following components in percentage by weight: 10-75% of effective components, 6-30% of a modified dispersant, 1.5-25% of an adsorbent and the balance being auxiliary components; the effective components are pyroxasulfone and glyphosate / glufosinate-ammonium; and a theory of pesticide compounding technology is used, the compound weeding control effect is effectively improved, the appropriate period of application is prolonged, the dosage is reduced, the phytotoxicity is reduced, the residue is reduced, and the occurrence of weed resistance and drug resistance is delayed. The modified dispersant is formed by copolymerization of an intermediate product 3, a methyl allyl polyoxyethylene ether and hydroxypropyl methacrylate ternary system, and the dispersant has the dual characteristics of a polyoxyethylene ether surfactant and a sulfonate surfactant, so that the dispersity of effective components is effectively improved, meanwhile, the compound herbicide has good wettability on plant leaf surfaces, and loss of the effective components is reduced.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a compound herbicide containing pyrazafen. Background technique [0002] Pyroxasulfone, molecular formula C 12 h 14 f 5 N 3 o 4 S, the chemical name is 3-[5-(difluoromethoxy)-1-methyl-3-(trifluoromethoxy)pyrazol-4-ylmethylsulfonyl]-4,5-dihydro -5,5-Dimethyl-1,2-isoxazole. The herbicide was first discovered by the Japanese K-I Chemical Research Institute, and later industrialized jointly by the Japanese Combination Chemical Company and the Japanese Anyuan Chemical Company. Metraxazone sulfone is mainly used to control a variety of grass weeds. Metraxazole sulfone works by inhibiting the synthesis of ultra-long-chain fatty acids, which can effectively kill grass weeds such as millet and millet, and also has a good control effect on weeds such as Chenopodium, with a wide spectrum of weed control. [0003] However, the long-term use of the herbicide containing ...

Claims

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Application Information

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IPC IPC(8): A01N43/80A01N57/20A01N25/22A01N25/30A01N25/08A01P13/00C08F216/14C08F220/40C08F220/20B01J20/10B01J20/28B01J20/30
CPCA01N43/80A01N57/20A01N25/22A01N25/30A01N25/08C08F216/1433B01J20/103B01J20/28054C08F220/40C08F220/20
Inventor 郭晓刚徐艳春
Owner 安徽喜田生物科技有限公司
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