Synergic herbicide composition containing cyhalofop-butyl and 2,4-dichlorophenoxyacetic acid and application thereof

Abstract

The invention discloses a synergic herbicide composition containing cyhalofop-butyl and 2,4-dichlorophenoxyacetic acid and application thereof. The herbicide composition comprises the cyhalofop-butyl and the 2,4-dichlorophenoxyacetic acid which serve as the main active ingredients, wherein the mass ratio of the cyhalofop-butyl to the 2,4-dichlorophenoxyacetic acid is 1-60:1-60. The synergic herbicide composition can be used for preparing herbicides for controlling post-emergence weeds in paddy field. Compared with single-composition herbicide, the herbicide composition has a broad herbicide spectrum and acts for a long time on the premise of improving the herbicide effect, is safe for the paddy fields and after-reap crops and particularly has obvious effect of controlling various gramineous weeds and broadleaf weeds in the paddy fields.

Description

technical field [0001] The invention belongs to the technical field of pesticides, in particular to the field of herbicides, and relates to a binary compound of cyhalofop-methyl and 2,4-dichlorophenoxyacetic acid. The herbicidal composition can be applied to weeding stems and leaves in paddy fields. technical background [0002] Rice is the main food crop in my country, accounting for 40% of food production. Rice is a short-day crop that likes temperature and humidity. The country is divided into double-cropping rice, single-cropping rice, and single- and double-cropping rice. According to reports, about 1 / 2 of the rice area in the country is affected by weeds in different degrees, and the area of ​​severe weeds is about 10-20%. If weeding is not done in the field, the rice yield can be reduced by more than 50%. In order to reduce the economic loss caused by weed damage and reduce labor intensity, chemical weeding has been gradually accepted by people because of its conveni...

AI Technical Summary

Problems solved by technology

However, 2,4-dichlorophenoxyacetic acid is ineffective against grass weeds, and it is easy to drift and cause phytotoxicity to surrounding flowers and trees, so its use is greatly restricted

[0010] At present, herbicides in paddy fields are limited by the safety of crops, and the herbicidal spectrum is also limited. Using a single herbicide alone cannot completely and effectively control the occurrence of weeds in paddy fields. Moreover, some herbicides are highly water-soluble or persistent If the period is too long, the dosage is too large or the application is uneven, it will easily cause residual toxicity to the subsequent crops.

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