Weeding composition

Abstract

The invention provides a weeding composition. Active components of the weeding composition consist of halosulfuron-methyl and mefenacet; the weight ratio of the halosulfuron-methyl to the mefenacet is 1:1 to 1:100. The invention also relates to the application of the weeding composition to prevention and control of the growth of undesired plants such as broadleaf weed, sedge weed or grassy weed, in particular to the application of the weeding composition to prevention and control of the growth of undesired plants such as echinolchloacrus-galli (ECHCG), leptochloa chinensis (LEFCH) and cyperus difformis L in cereal crops. The invention also provides a method for preventing and controlling the growth of the undesired plants. The method comprises the following steps: contacting the undesired plants or growth places thereof with the weeding composition with weeding effective quantity, or applying the weeding composition with weeding effective quantity to soil or water to prevent germination or growth of the undesired plant. The composition provided by the invention can remarkably improve the weeding effect and effectively control weed, avoids toxicity on crops, and improves the compatibility with the crops.

Description

technical field [0001] The present invention belongs to the field of pesticides, and in particular relates to a herbicidal composition and a method for controlling unwanted plant growth. Background technique [0002] The world's food production suffers huge losses due to diseases, insects, and weeds every year, and crops are almost always attacked by various weeds throughout the growing season, and the damage of weeds is also a key factor restricting crop yields. Therefore, the control of agricultural weeds has always been the most concerned and important issue in agricultural production. [0003] Protecting crops from weeds and other vegetation that inhibit crop growth is an ongoing problem in agriculture. To address this problem, many chemicals and chemical formulations to control weed growth have been used commercially. [0004] Rice is one of the main food crops in the world. Nearly half of the world's population, including almost the entire population of East Asia and...

AI Technical Summary

Problems solved by technology

[0011] However, with the continued use of many herbicide varieties in large areas of rice fields, many problems have also arisen: (1) Weed resistance is outstanding, among which the resistance of barnyardgrass to propanil and butachlor and other herbicides is more prominent , and the resistance of Cyperaceae weeds to sulfonylurea herbicides has gradually emerged; (2) The damage of older weeds and perennial weeds has become an important problem, especially older barnyard grass and Cyperaceae perennial weeds. Not outstanding; (3) The herbicide variety has a single effect and a short duration of action

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