Herbicide composition and application thereof

Abstract

The invention relates to a compound herbicide containing quinclorac or an agriculturally acceptable salt or ester of the quinclorac, and cyprosulfamide. The quinclorac and cyprothiomide are used as main effective components, wherein the weight ratio of the quinclorac to the cyprosulfamide is 500:1-1:2. The herbicide disclosed by the invention is high in safety, and the phytotoxicity of the quinclorac to crops such as cotton is overcome, the application range of the quinclorac is directly expanded, and the compound herbicide can be directly applied to the prevention and treatment of gramineousand broadleaf weeds in cotton fields.

Description

technical field [0001] The invention belongs to the field of agricultural herbicides and relates to a composite herbicide containing quinclorac or an agriculturally acceptable salt or ester thereof and cyprosulfamide. Background technique [0002] Quinclorac, the trade name is quinclonic acid, other names are chloroquine acid, god hoe, barnyard grass death, fast killing barnyard, gram barnyard star, killing barnyard net, etc., and its chemical name is 37-dichloroquinoline-8 -Carboxylic acid, its molecular formula is C10H5Cl2NO2, relative molecular weight is 242.1, and CAS registry number is Quinclorac. The structural formula is as follows: [0003] Quinclorac is a special selective herbicide for controlling barnyardgrass in rice fields. It has outstanding effect on barnyardgrass at the 4-7 leaf stage, strong selectivity, and a wide range of application periods. One application can control barnyardgrass throughout the growth period of rice. . Quinclorac can be absorbed by ...

AI Technical Summary

Problems solved by technology

[0006] At present, quinclorac is used at the recommended dose, and cotton can only be planted after an interval of 8 months. In rice, quinclorac is sprayed by spraying. For the convenience of use, the spraying method is changed to the poisonous soil method. If the effect is not good, the dosage will be increased, the residual pesticide damage will increase, the water spray volume will be too high, the fog droplets will be too large, and the fog droplets will roll down from the leaves, which will also easily cause the symptoms of residual pesticide damage of the next crops, such as tobacco, cotton, soybean, etc. The plant is dwarfed, the leaves are dark green, shrinking and narrowing, the leaf edges are rolled out, and the leaf tips are hooked, which seriously inhibits growth (herbicide residues and drifting phytotoxicity, Liang Zhigang, etc., feed and planting)

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