Pyraclonil-containing weeding composition and application method thereof

Abstract

The invention relates to a pyraclonil-containing weeding composition and an application method thereof. The weeding composition contains the following components in parts by weight: 10-25 parts of a herbicide, 1-25 parts of a surfactant, 2-30 parts of an oil substance, 1-10 parts of white carbon black, 10-80 parts of a solid shell-core material and 1-30 parts of KCl, wherein the herbicide is pyraclonil; the surfactant is a compound surfactant containing sulfonate lignin, alkylphenol polyoxyethylene ether in a weight ratio of (1 to 20)-(30 to 1); and the oil substance is a compound oil substance containing mineral oil and vegetable oil in a weight ratio of (1 to 10)-(20 to 1). By selecting a specific surfactant and particularly selecting a combination in a certain proportion, the dispersityof the composition is greatly improved, the diffusion velocity is high and is more than 1.4m / min, and the loss of the active ingredients is decreased to be below 5%; and compared with the prior art,by selecting the oil substance, the durability is increased by at least 20%, and the composition has relatively good production and application values. Furthermore, by selecting specific active ingredients, the composition has a relatively good synergistic effect.

Description

technical field [0001] The present invention relates to the field of pesticides, in particular to the field of herbicides, in particular to a herbicidal composition containing dipacenil and an application method thereof. Background technique [0002] Rice direct seeding technology refers to the planting method of directly sowing seeds in the field for cultivation. According to soil moisture status and irrigation methods before and after sowing, direct-seeding rice can be divided into four types: water direct-seeding, dry direct-seeding, wet direct-seeding and dry-planting rice. At present, water live broadcasting is the most widely used. At present, rice is one of the most widely planted crops in China, with a total planting area of ​​450 million mu. And most of the planting of direct seeding rice is very common at present. Compared with the traditional manual transplanting, it has the advantages of labor saving, labor saving, and high labor production efficiency; however...

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Problems solved by technology

[0003] Dipyrazonil belongs to the herbicidal compound of pyrazolopyridine ring, which has great effects on barnyardgrass and co-occurring annual weeds of Miscyaceae and broad-leaved weed plantain High activity, but this variety has been partly resistant since long-term use, the prior art discloses that some officials use dipacenil and its herbicide combined with other herbicidal active components, for example, Chinese patent 201410458494 discloses The compound composition of dipacenil and pretilachlor, however, in terms of dosage forms, is only formulated into traditional pesticide preparations, such as granules, powders, emulsifiable concentrates, etc.; without considering the specificity of the above-mentioned weeds, it has developed It is suitable for the control of weeds in paddy fields, especially weeds in direct seeded paddy fields

[0004] Regarding the suitable formulations for paddy fields, the applicant has done a lot of research on paddy field agricultural formulations, such as 201310710822.4 (a paddy field herbicide large granule and its preparation method), which discloses that the herbicides pretilachlor, pyrazosulfuron-methyl, etc. Mixed with alkylamide polyoxyethylene ether, phenylphenol polyoxyethylene ether and other additives to prepare large granules; 201410670721.3 (a paddy field weed control large granule containing pyrazosulfuron-methyl and quinclorac), disclosed that it will contain The above-mentioned active ingredients are mixed with surfactants, oily substances, solid core materials and other additives to prepare large granules; 201610290446.1 (a composition floating large granule for preventing and treating rice sheath blight and rice blast and its preparation method) is also disclosed The large granules containing active ingredients, dispersants, extenders and other auxiliary agents were mixed; however, the applicant found after a long period of research that the dispersibility, stability and sustained release effect of the previously developed large granules in the large granules Convenience is not ideal, so the applicant newly developed a large granule formula with better effect by adjusting the content of multiple components and corresponding components in the large granule

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