Composite herbicide for preventing and controlling rice weed moleplant seed and barnyard grass

Abstract

The invention relates to compound herbicide for controlling paddy rice weed of Chinese sprangletop and barnyard grass. The compound herbicide can control the paddy rice weed of Chinese sprangletop and barnyard grass. The active ingredient of the invention is R (+) 2 [4 (2 fluoro 4 cyanophenoxy) phenoxy], butyl propionate and 3, 7-dichloroquinoline-8-carboxylic acid. The invention deeply examines interaction effect of barnyard grass and Chinese sprangletop, field control effect, complementarity of weed control spectrum, applicable formulation and so on. Indoor biological test and field control test show that cyhalofop butyl and quinclorac are scientifically portioned, and relevant auxiliary agent is added, and cyhalofop butyl quinclorac compound is made after being processed a certain technology. The control effect for the paddy field weed Chinese sprangletop and barnyard grass of the compound is obviously higher than single agent. The compound improves the control effect, enlarges the weed control spectrum, delays weed resistance, and reduces the using of pesticide. The invention not only lowers the agricultural cost, but also is much safer to crops.

Description

technical field [0001] The invention relates to a compound herbicide capable of preventing and controlling the weeds of Paddy's Stephania and barnyardgrass. Background technique [0002] Rice is one of the main food crops in my country. In recent years, due to the rapid development of social economy, it is required to continuously reform the farming system and planting methods of traditional crops in order to improve economic benefits and increase farmers' income. A labor-saving, water-saving, simplified farming operation, high-yield and high-efficiency planting method-direct-directed rice is booming, but because the main weeds of direct-directed rice fields, barnyardgrass and chinensis, are seriously damaged, according to the survey, the fields damaged by weeds Yield loss is generally 10-20%, serious damage 40-50%, or even no harvest. Weed damage has seriously affected the promotion of high-yield and high-efficiency planting method-direct-directed rice. Therefore, the prev...

AI Technical Summary

Problems solved by technology

[0004] (R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]butyl propionate (hereinafter referred to as cyhalofop-methyl), is an aryloxyphenoxypropionic acid herbicide, It is the safest for rice and also a grass herbicide with systemic conductivity. It has special effects on Paddy chinensis. The production cost of this product is high and the price is expensive.

[0005] Quinclorac is a hormone-type quinolinic acid herbicide, which has high activity and good control effect on barnyardgrass in paddy fields. The anti-efficacy of Qianjinzi is poor; cyhalofop-ester has a special effect on Qianjinzi, and the price is expensive. In actual production, some farmers mix and use the above two agents in the fields, which is random and lacks rigor and scientificity. Often either the overdose causes phytotoxicity, or the proportion deviation is large and the control effect is poor.