Three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds

Abstract

The invention discloses a three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds. The three-element compounding agent is characterized by being prepared by taking bensulfuron methyl, pretilachlor and pendimethalin as active ingredients and then adding a safener namely fenclorim. The mixing ratio of bensulfuron methyl to pretilachlor to pendimethalin is (7.5-60):(75-600):(30-240) (ga.i./ha), the ratio of pretilachlor to the safener namely fenclorim in the compounding agent is (3:1)-(3:2), the application time of the compounding agent is 3-5 days after sowing cultivated rice, the field recommended dosage is 337.5-562.5ga.i./ha, and excess water should be avoided in 24 hours after application, otherwise, pesticide hazards are caused to the cultivated rice. The three-element compounding agent disclosed by the invention can be used for greatly expanding the weed control spectrum, reducing the number of application and the quantity of work, reducing the weeding cost, improving the economic benefit, reducing the pesticide hazards, improving the safety and relieving the drug resistance of weeds.

Description

technical field [0001] The present invention relates to a ternary compound agent bensulfuron-methyl-pretilachlor-pentamethalin for controlling weeds in dry-seeded rice fields. Background technique [0002] Rice dry direct seeding is to sow the treated rice seeds into the soil after site preparation through a seeder, which eliminates the complicated process of rice transplanting such as breeding, transportation, and transplanting, and greatly reduces the labor intensity of farmers. Since the 1980s, a large number of rural labor forces in my country have flowed to cities, and direct-directed rice cultivation has become more and more popular among farmers, especially in economically developed southeast coastal areas such as Jiangsu, Zhejiang and Shanghai. At the same time, dry direct-directed cultivation has greatly reduced production costs. At the same time, dry direct seeding cultivation is conducive to saving water resources. Transplanting fields are usually flooded and irrig...

AI Technical Summary

Problems solved by technology

However, due to the homologous similarity between cultivated rice and weedy rice, pretilachlor often causes phytotoxicity to cultivated rice

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