Weed control composition containing tembotrions and cyhalofop-butyl and application of weed control composition in weed control of paddy field

Abstract

The invention discloses a weed control composition containing tembotrions and cyhalofop-butyl. The tembotrions and the cyhalofop-butyl are used as main effective constituents of the weed control composition, and the mass ratio of the tembotrions to the cyhalofop-butyl is 10-40: 1 and 1: 1-50. The invention further discloses application of the weed control composition in weed control of a paddy field, and particularly relates to application in control of gramineous weeds, broadleaf weeds and cyperaceous weeds in the paddy field. Two herbicides including the tembotrions and the cyhalofop-butyl which have different weed control spectra and have complementary advantages and disadvantages are selected and are prepared into a mixture after being decreased property, therefore, the weed control spectra are expanded, the weed control effect is improved obviously, and possibility of pesticide hazard to seasonal crops and residual hazards to afterreap crops.

Description

technical field [0001] The invention relates to a herbicidal composition and its application, especially a herbicidal composition containing tembotrione and cyhalofop-ethyl, and the application of the herbicidal composition in controlling weeds in paddy fields. Background technique [0002] Tembotrione, chemical name: 2-[2-chloro-4-(methylsulfonyl)-3-[(2,2,2-trifluoroethoxy)methyl]benzoyl]-1 ,3-cyclohexanedione. Triketone is a triketone cornfield herbicide, its herbicidal activity is shown by 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor, after HPPD is inhibited, tyrosine accumulates in the weed meristem And plastoquinone deficiency, 3-5 days later, the weeds will appear yellowing symptoms, and eventually spread to the whole plant, and the weeds will turn white and die. Tetrasulfone is mainly used to control a variety of gramineous weeds and broad-leaved weeds in corn fields and rice fields. It also has a strong killing effect on a variety of weeds such as catfish,...

AI Technical Summary

Problems solved by technology

[0004] At present, herbicides in rice fields are limited by the safety of crops, and the herbicidal spectrum is also limited. There are many types of weeds in crop fields. Using a single herbicide alone cannot completely and effectively control the occurrence of weeds in rice fields. With the increase of growth and application dosage, weeds in paddy fields are resistant to herbicides, and the frequency of resistance is increasing, and the range of resistance is expanding year by year, and the control effect of a single agent is greatly reduced

In addition, some herbicides are likely to cause residual toxicity to the crops of the current season or subsequent crops due to their high water solubility, long duration of field effects, excessive dosage, or uneven application, and may also easily cause pesticide residues and environmental pollution. question

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