Ternary weeding composition for paddy rice direct-seeding field

Abstract

The invention discloses a ternary weeding composition for a paddy rice direct-seeding field. The weeding composition comprises pyrazosulfuron-ethyl, fenoxaprop-p-ethyl, penoxsulam and a synergist, wherein the mass ratio of pyrazosulfuron-ethyl to fenoxaprop-p-ethyl to penoxsulam to the synergist is (1-50) to (1-15) to (10-20) to (1-5). The weeding composition has a synergistic effect, is mainly used for being sprayed about 10 days after transplantation in the paddy rice direct-seeding field to prevent and remove grassy weeds such as barnyard grass and moleplant seeds overgrown in the paddy rice direct-seeding field, and also can be used for preventing other broadleaf weeds such as rotala indica, monochoria vaginalis and euphorbia helioscopia and cyperus weeds such as eleocharis yokoscensis and cyperus difformis; in addition, the weeding composition has the characteristics of high weeding activity, wide weeding spectrum and convenience in use, is safe to paddy rice and belongs to environment-friendly weedicides.

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, fenoxaprop-ethyl and penoxsulam for controlling weeds in direct-seeded rice 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 th...

AI Technical Summary

Problems solved by technology

The development of herbicides in paddy fields lags behind, and there are not many varieties. The widely used ones are bensulfuron-methyl, acetochlor, and tetrachloride. However, due to the long service life of these products, weeds have developed drug resistance. And their effect on barnyardgrass and Qianjinzi is not ideal

Images