Synergistic weeding composition

Abstract

The invention provides a synergistic weeding composition, which comprises active ingredients of bensulfuron methyl or pyrazosulfuron-ethyl, pyroxasulfone and mefenacet in a weight proportion range of (1 to10):(1 to50):(1 to100). The synergistic weeding composition is used for achieving the purpose of preventing and controlling unexpected plant growth. The invention also provides a method for preventing and controlling expected plant growth. The active ingredients of the bensulfuron methyl or the pyrazosulfuron-ethyl, the pyroxasulfone and the mefenacet of the synergistic weeding composition are jointly or singly applied to unexpected plants or growth places of the unexpected plants. The invention also provides a method for reducing or preventing the damage of the pyroxasulfone to useful crop plants treated by the pyroxasulfone, useful crop seeds or other breeding parts of the useful crops.

Description

technical field [0001] The present invention relates to a synergistic herbicidal composition. The invention also relates to a method for controlling unwanted vegetation. Background technique [0002] In crop farming, it is important to control weeds and protect crops that inhibit crop growth and result in lower yields. In order to reduce losses due to weeds in crop cultivation, such as poor growth or reduced crop yield, some herbicidal active ingredients that are effective in controlling the weeds and are safe to crops have been developed. To date, a large number of herbicides have been developed that have been registered and used to control weeds in certain crops. Herbicides for controlling weeds in specific crop cultivation should have sufficiently high herbicidal activity and broad herbicidal spectrum, and should be sufficiently safe for the environment and crops. However, not all herbicides can fully meet the above requirements. [0003] The most commonly used method...

AI Technical Summary

Problems solved by technology

[0017] At present, herbicides 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 crop fields. On the other hand, the amount of herbicide is too large or the application is uneven. Also prone to unacceptable toxicity to current or subsequent crops

Pyroclofensulfone is a highly effective pre-emergence herbicide but has poor post-emergence activity

In addition, pyroxasulfone is compatible with some dicotyledonous crops such as cotton, sunflower, soybean, brassica (brassica) crops such as canola (canola) and rapeseed, and some gramineous crops such as rice, wheat, black The compatibility of wheat and barley is not always satisfactory, that is, in addition to harmful plants, crops are also damaged to an unacceptable extent

Although in principle it is possible to reduce the application rate without damaging the crop, the degree of control of harmful plants is also naturally reduced

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