Weeding composition for controlling resistant weeds

Abstract

The invention belongs to the technical field of pesticides, and discloses a weeding composition being safe to wheat and having a significant control effect on sulfonylurea-resistant weeds in the wheatfield. The weeding composition is composed of a weeding active component and a safener, wherein the weeding active component is mesotrione. The mass fraction of the weeding active component mesotrione in the composition is 1-99%, and preferably 10-55%. A weight ratio of the weeding active component to the herbicide mesotrione is 1:(2-10), and preferably 1:(4-8). Different auxiliary materials areadded to prepare a suspension, a dispersible oil suspension, a wettable pulvis, a water dispersible granule, a granule or any pesticide preparation type. The weeding composition safely applied to wheat crops in order to control the sulfonylurea-resistant weeds is not reported, and is domestically initiated. The weeding composition has a thorough control effect on Descurainia Sophia, cleavers, shepherd's purse, Erysimum cheiranthoides, Alopecurus aequalis Sobol., Alopecurus japonicus, Bromus japonicus, wild oats, ryegrass and bluegrass which cannot be well controlled by perennially used sulfonylurea herbicides.

Description

technical field [0001] The invention relates to the technical field of processing and application of pesticide preparations, in particular to a herbicidal composition which is safe for wheat and has a significant control effect against sulfonylurea weeds in wheat fields. The herbicidal composition contains herbicidal active ingredients and optional herbicides Safener. Background technique [0002] The application of herbicides targets weeds, and weeds and protected crops are both plants. Although the mechanism of action of herbicides is selective, it is often due to human factors, environmental factors, etc. that cause phytotoxicity to crops, and at least inhibit growth. , reduce the quality of agricultural products, and in severe cases, yield reduction or crop death. [0003] At present, the phytotoxicity caused by the application of herbicides has become a problem that cannot be ignored in agricultural production. Among the many methods to solve herbicide injury, herbici...

AI Technical Summary

Problems solved by technology

[0010] At present, weeding in wheat fields is faced with many problems: 1. Due to the long-term use of the broad-leaved weeds Tribesulfuron-methyl and Bensulfuron-methyl, the resistance of the dominant broad-leaved weeds Artemisia solani and shepherd’s purse in wheat fields is common, and some areas have reached 200- 1500 times the level of resistance, the original medicine can no longer control its harm

2. The succession of weed communities in the field is becoming more and more serious due to cross-regional operation of farming machinery and seed allocation, etc., some grasses and some malignant weeds gradually become dominant weeds, such as knotty wheat, multiflora ryegrass, and large spike Look at Mai Niang, Zhu Yangyang, etc.

3. Herbicide injury occurs from time to time

The safety of herbicides is greatly affected by environmental factors. It is common for farmers to increase the dosage at will in production. The low level of drug use technology and equipment in most areas of the country are all factors that cause herbicide damage.

[0011] Although large foreign companies have developed preparations based on new compounds, such as mesosulfuron-methyl, acesulam, florasulam, and flumesulam, etc., they do not always have impressive results in practice. Satisfactory properties, such as wheat safety concerns

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