Weeding composition containing pyroxasulfone and flumetsulam

A technology of flumesulam and herbicidal composition, which is applied in the field of pesticide preparation, can solve the problems of inability to kill a variety of weeds at the same time, poor adhesion of plant leaves, and easy to be washed out by rain, and achieve excellent hydrophilic properties and antibacterial properties, less irritation to the human body, and good dispersibility

Inactive Publication Date: 2021-09-03
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

[0007] At present, there are many kinds of weeds in wheat fields with different characteristics. A single herbicide has a limited herbicidal spectrum and cannot kill a variety of weeds at the same time. Moreover, the existing pesticides have poor adhesion on plant leaves and are easily washed out by rain. In addition, the synergists of existing pesticides cannot be degraded, and long-term use will pollute the soil and affect the growth of crops

Method used

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  • Weeding composition containing pyroxasulfone and flumetsulam
  • Weeding composition containing pyroxasulfone and flumetsulam
  • Weeding composition containing pyroxasulfone and flumetsulam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Synergists are made from the following steps:

[0065] Step 1. Add 22.56mmol of 2,2-dimethylolpropionic acid, 45.49mmol of 4-bromomethylbenzaldehyde, 0.35mmol of p-toluenesulfonic acid, and 2mL of N,N-dimethylbenzenesulfonic acid into a round bottom flask Methylformamide and 15mL cyclohexane, oil bath temperature 100°C, reflux for 1.5h, after the reaction, cool to room temperature, add 0.35mmol sodium bicarbonate to the round bottom flask, stir at room temperature for 30min, and distill under reduced pressure , removing N,N-dimethylformamide and cyclohexane to obtain a viscous solid, which was processed to obtain intermediate 1;

[0066] Step 2. Add 0.3g of potassium carbonate, 0.1mol of intermediate 1, and 100mL of deionized water into the reaction kettle. After mixing evenly, add 0.2g of tetraethylammonium bromide, and carry out reflux reaction at a temperature of 110°C 1h, then add acetic acid to adjust the pH value to 6, stir for 5min, then filter with suction, was...

Embodiment 2

[0074] Synergists are made from the following steps:

[0075] Step 1. Add 22.56mmol of 2,2-dimethylolpropionic acid, 45.49mmol of 4-bromomethylbenzaldehyde, 0.35mmol of p-toluenesulfonic acid, and 2mL of N,N-dimethylbenzenesulfonic acid into a round bottom flask Methylformamide and 15mL cyclohexane, oil bath temperature 102°C, reflux reaction for 1.6h, after the reaction, cool to room temperature, add 0.37mmol sodium bicarbonate to the round bottom flask, stir at room temperature for 30min, and distill under reduced pressure , removing N,N-dimethylformamide and cyclohexane to obtain a viscous solid, which was processed to obtain intermediate 1;

[0076] Step 2. Add 0.3g of potassium carbonate, 0.1mol of intermediate 1, and 110mL of deionized water into the reaction kettle. After mixing evenly, add 0.2g of tetraethylammonium bromide, and carry out reflux reaction at a temperature of 115°C 1.2h, then add acetic acid to adjust the pH value to 6.2, stir for 5min and then filter w...

Embodiment 3

[0084] Synergists are made from the following steps:

[0085] Step 1. Add 22.56mmol of 2,2-dimethylolpropionic acid, 45.49mmol of 4-bromomethylbenzaldehyde, 0.35mmol of p-toluenesulfonic acid, and 2mL of N,N-dimethylbenzenesulfonic acid into a round bottom flask Methylformamide and 15mL cyclohexane, oil bath temperature 105°C, reflux for 1.8h, after the reaction, cool to room temperature, add 0.38mmol sodium bicarbonate to the round bottom flask, stir at room temperature for 30min, and distill under reduced pressure , removing N,N-dimethylformamide and cyclohexane to obtain a viscous solid, which was processed to obtain intermediate 1;

[0086] Step 2. Add 0.3g of potassium carbonate, 0.1mol of intermediate 1, and 120mL of deionized water into the reaction kettle. After mixing evenly, add 0.2g of tetraethylammonium bromide, and carry out reflux reaction at a temperature of 120°C After 1.5 hours, add acetic acid to adjust the pH value to 6.5, stir for 5 minutes and then filter...

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Abstract

The invention discloses a weeding composition containing pyroxasulfone and flumetsulam, belongs to the technical field of farm chemical preparation, and solves the problems that at present, weeds in a wheat field are various in variety and different in characteristics, a single herbicide is limited in herbicide controlling spectrum and cannot kill various weeds at the same time, existing farm chemicals are poor in adhesive force on plant leaves, and existing farm chemical synergists cannot be degraded. The weeding composition comprises the following raw materials in percentage by mass: 4-50% of pyroxasulfone, 2-60% of flumetsulam, and 1-2% of a synergist, with the balance being auxiliaries and excipients. While the weeding composition is prepared, the synergist is also prepared, the synergist contains a biquaternary ammonium salt structure, diester groups, diacetal, diglucose molecules and alkyl chains, has relatively low micelle concentration, and can be spread and wet on crops when being used as a farm chemical additive and a spraying solution, so that the rain wash of the spraying solution is reduced, the wetting time of the spraying liquid is prolonged, the absorption of plants to the spraying liquid is increased, and the control effect of the farm chemicals is improved.

Description

technical field [0001] The invention belongs to the technical field of pesticide preparation, and in particular relates to a herbicidal composition containing metazafen-sulfone and flumetsulam. Background technique [0002] Pyroxasulfone is an isoxazole herbicide with the chemical name 3-[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazole-4 -ylmethylsulfonyl]-4,5-dihydro-5,5-dimethyl-1,2-isoxazole, which belongs to the class of herbicides of ultra-long-chain fatty acid elongation synthetase inhibitors, inhibits ultra-long-chain Fatty acid elongation synthetase (VLCFAE) exerts its medicinal effect. It is mainly used as a pre-emergence sealing treatment agent, supplemented by blocking grass-based broad-leaved grasses, and has many advantages: it is suitable for a wide range of crops, and can be used for wheat, corn, peanuts, rice, soybeans, cotton and other crops; it is environmentally safe, It is safe for current crops and next crops; the duration of effect is long, u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/90A01N43/80A01N25/30A01P13/00C07H15/18C07H1/00
CPCA01N43/90A01N43/80A01N25/30C07H15/18C07H1/00
Inventor 郭晓刚徐艳春
Owner 安徽喜田生物科技有限公司
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