Synergistic weed control composition

Abstract

The invention provides a synergistic weed control composition. The synergistic weed control composition comprises active ingredients, namely pyroxasulfone and bensulfuron-methyl, in a weight ratio of (50 to 1)-(1 to 50). The synergistic weed control composition is applied to prevention of growth of undesirable plants. The invention also provides a method for preventing growth of the undesirable plants. The method is characterized by jointly or independently applying the active ingredients, namely pyroxasulfone and bensulfuron-methyl, of the synergistic weed control composition to the undesirable plants or the growth places of the undesirable plants. The invention also provides a method for reducing or preventing damages caused by pyroxasulfone to plants, seeds or other reproducing parts, which are treated by pyroxasulfone, of useful crops.

Description

Technical field [0001] The invention relates to a synergistic herbicidal composition. The invention also relates to a method for controlling the growth of undesirable plants. Background technique [0002] Crop yields are reduced due to weed damage. Therefore, large amounts of herbicides need to be applied every year to control weeds to restore crop yield losses. In recent years, the harm of weeds to crops has become more and more serious, and due to the abuse of herbicides, weeds have become increasingly resistant to pesticides, causing the weed control effect to decrease year by year. [0003] The most commonly used method of increasing herbicidal activity and broadening the herbicidal spectrum of existing herbicides is to mix two or more herbicidal active substances with different herbicidal activities. If two or more herbicidal active substances are mixed, it may show greater herbicidal efficacy than individual herbicide applications. Thus, when the potency of a mixtur...

AI Technical Summary

Problems solved by technology

Bensulfuron-methyl has special effects on vicious weeds such as triangular weeds, sagittarius japonica, and spinach, and it only has an inhibitory effect on barnyard grass. Large triangular grass, poor control effect, high cost of medication

[0010] 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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