Weeding composition for rice direct-seeding field

Abstract

The invention discloses a weeding composition for a rice direct-seeding field. The weeding composition comprises pyrazosulfuron-ethyl, oxadiazon, pendimethalin and a synergist, wherein the mass ratio of pyrazosulfuron-ethyl to oxadiazon to pendimethalin to the synergist is (1-20):(5-25):(5-45):(1-5). The weeding composition for the rice direct-seeding field has a synergistic effect, is mainly sprayed about 10 days after the transplantation of the rice direct-seeding field to prevent and remove grassy weeds such as barnyard grass and leptochloa chinensis spreading over the rice direct-seeding field as well as other broadleaf weeds such as rotala indica, monochoria vaginalis and wartwort and cyperaceae weeds such as eleocharis yokoscensis and cyperus difformis, has the characteristics of high weeding activity, broad herbicide controlling spectrum and good convenience in use, is safe to rice, and belongs to an environment-friendly herbicide.

Description

technical field [0001] The invention belongs to the technical field of pesticide herbicides, and in particular relates to a herbicidal composition composed of pyrazosulfuron-methyl, oxadiazon and pendimethalin for controlling weeds in rice direct seeding fields. Background technique [0002] Rice is one of the main food crops in my country. Rice is the staple food of about 60% of the country's population. Its sown area accounts for about 18.5% of the country's total sown area, and rice output accounts for 39.23% of the total grain output. Therefore, the increase or decrease of rice output have a significant impact. However, all kinds of weeds have affected the yield of rice all the time. According to investigations, the loss of rice yield in fields damaged by weeds is generally 10-20%, and serious loss is 40-50%. In recent years, a labor-saving and water-saving planting method of live-seeding rice has risen rapidly, and its weed control is particularly important. Among them,...

AI Technical Summary

Problems solved by technology

It is especially sensitive to weeds in the germination stage. When the weeds germinate, the growth of the bud sheaths is inhibited, and their tissues rot rapidly, and the weeds die; as the weeds grow, the efficacy of the drug decreases, and it is basically ineffective against grown weeds

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