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Weeding composition for paddy field

A herbicidal composition and paddy field technology, applied in the field of agrochemicals, can solve problems such as difficult to achieve obvious effects, complex weeds and weeds in farmland, and difficulty of green pesticides, etc., achieve excellent control effect, wide herbicidal spectrum, Delaying the effects of weed resistance development

Inactive Publication Date: 2018-06-15
ZHEJIANG TIANFENG BIOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Farmland weeds are complex and diverse, and the application of chemical agents is one of the most effective chemical means to control agricultural weeds; it is a good solution to control agricultural weeds with new compounds without cross-resistance; however, transnational Although the company has a strong technical reserve and experience in new product development, there is an unavoidable fact that it is becoming more and more difficult to develop new formulations, efficient and environmentally friendly green pesticides in a timely manner, and the input-output ratio is also increasing. , the R&D cycle continues to grow, super weeds are becoming more and more serious, the speed of R&D is hard to match the speed of weed resistance, and this trend cannot be reversed
Other methods, such as crop layout adjustment, rotation of different pesticides, etc., are difficult to achieve obvious effects in actual operation.

Method used

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  • Weeding composition for paddy field
  • Weeding composition for paddy field

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In order to prevent and control weeds in paddy fields, the inventor conducted a synergistic research on the mutual compounding of fenpyramid, clomazone, fenoxaprop-ethyl and the safener isoxadifen as the active ingredients. The specific method For: the test targets were Eragrostis japonica (Thunb.). The original drug is prepared into the required test agent, and the test method refers to the "People's Republic of China Agricultural Industry Standard NY / T1155.7-2006 Indoor Bioassay Test Guidelines for Pesticides and Herbicides Part 7: Determination of Combined Effects of Mixing". Firstly, the single agent and each mixed agent are set to 5-7 different concentrations. Set water control, repeated 4 times. Adopt post-emergence stem-leaf spraying method, prepare the weeds for testing in advance, wait for the weeds 3 leaf 1 heart stage for standby, use the spray tower (Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture, 3WPSH-500D, spraying pressure 3.0 ...

Embodiment 1

[0030] Formulation example 1: 20% fenpyramid · clomazone · fenoxaprop-ethyl suspoemulsion (15:3:2)

[0031]Mefenpyramid 15%, Clomazone 3%, Fenoxaprop-P-P 2%, Isoxadifen 2%, C9-10 heavy aromatic solvent oil 15%, N,N-Dimethyldecano Amide 10%, castor oil polyoxyethylene ether 3%, hydroxyl polyoxyethylene block copolymer 2%, mixed to obtain an oil phase for use. 5% fenpyramid, 1% wetting agent polyoxyethylene polyoxypropylene block polyether, 3.5% dispersant phosphatidic ester, 0.5% thickener xanthan gum, 0.2% preservative Cathone, antifreeze Ethylene glycol 5%, defoamer silicone 0.2%, water make up to 100%. Mix fenpyramid, clomazone, fenoxaprop-ethyl, wetting agent, dispersant, preservative, antifreeze, and water with a shearing machine at high speed, and then sand them with a sand mill When the particle size of the material is D90<3um, the mother liquor is obtained. During the high-speed shearing process of the mother liquor, the oil phase and the thickener are sequentially ad...

Embodiment 2

[0032] Formulation example 2: 22% oxapropen-clomazone-oxaprop-p-ethyl EC (15:5:2)

[0033] Methazone 15%, Clomazone 5%, Fenoxaprop-P-P 2%, Isoxadifen 2%, Calcium Dodecyl Benzene Sulfonate 4%, Alkylphenol Ethoxylates Polyoxypropylene block polyether 2.5%, fatty alcohol polyoxyethylene ether 20%, C9-10 heavy aromatic solvent oil balance, fully dissolve each active ingredient and various solvents according to the formula ratio, add various auxiliary ingredients, Stir evenly to prepare 22% oxapropen·clomazone·ethyl oxaprop-ethyl EC.

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Abstract

The invention discloses a weeding composition for a paddy field and application of the weeding composition. The weeding composition is prepared from the following effective components: metamifop, clomazone, fenoxaprop-p-ethyl and a safener isoxadifen-ethyl, wherein the weight ratio of the metamifop to the clomazone to the fenoxaprop-p-ethyl is (10 to 20):(1 to 5):2 and the weight ratio of the fenoxaprop-p-ethyl to the isoxadifen-ethyl is (1 to 2):1. The weeding composition for the paddy field, disclosed by the invention, has the advantages of synergistic effects and capability of controlling annual weeds in the paddy field; the effect of the weeding composition is better than that of a single preparation, so that a weed control spectrum is enlarged; meanwhile, the use amount of pesticide is reduced, further the pollution of the environment is reduced and weed resistance is delayed; the weeding composition for the paddy field is a novel pharmaceutical composition which has a good control effect on the annual weeds in the paddy field.

Description

technical field [0001] The invention belongs to the field of agrochemicals, and in particular relates to a paddy field herbicide composition aimed at solving the problem of controlling annual weeds in paddy fields. Background technique [0002] Metamifop belongs to the class of aryloxyphenoxypropionate herbicides, and its mechanism of action is to inhibit the biosynthesis of acetyl-CoA carboxylase. A few days after the application, the leaves of sensitive weeds will turn green and inhibit their growth. Generally, weeds will dry up and die after 2 weeks. It is mainly used to control most of the annual grass weeds in transplanted rice fields and direct-seeded fields, such as barnyard grass, stephenia, goosegrass, etc. [0003] Clomazone is a carotenoid biosynthesis inhibitor among isoxazolone herbicides, a selective pre-emergence and post-emergence herbicide, which inhibits the biological synthesis of carrots and chlorophyll by inhibiting the synthesis of pentadiene compounds...

Claims

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Application Information

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IPC IPC(8): A01N43/80A01N43/76A01N25/32A01P13/00
CPCA01N25/32A01N43/76A01N43/80
Inventor 祁月月陈丰喜康家树王国华曹轩陈涛
Owner ZHEJIANG TIANFENG BIOLOGICAL SCI
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