Compound preparation of corn field post-emergence herbicide and preparation method thereof

Abstract

The invention discloses a compound preparation of a corn field post-emergence herbicide. The compound preparation is prepared from the following components in percentage by weight: 1-3% of nicosulfuron, 3-8% of tembotrione, 5-10% of s-metolachlor, 10-25% of atrazine, 8-10% of a synergistic aid, 1-2% of a safener and 50-70% of a solvent. According to the invention, four herbicidal active ingredients of nicosulfuron, tembotrione, s-metolachlor and atrazine are ground together by adding an auxiliary agent solvent according to a ratio to form a stable oil suspension state which is easily dissolvedin water; in actual use, through the combined action of four weeding principles with different effective components, common gramineous weeds, broadleaf weeds and nutgrass flatsedge in a corn field are effectively prevented and killed, the generation of drug resistance of the weeds is reduced, and meanwhile, due to the use of various auxiliary emulsifiers, the permeation effect of liquid medicineis improved, the absorption of the weeds is promoted, and the utilization rate of the liquid medicine is increased.

Description

technical field [0001] The invention relates to the technical field related to the development and compounding of pesticide preparations, in particular to a compound preparation of a post-emergence herbicide in a corn field and a preparation method thereof. Background technique [0002] Corn is the main food crop in the world, and it is also an important feed crop and industrial raw material. With the development of animal husbandry, food processing, wine making and biodiesel industries, the market demand for corn continues to increase; the global annual average planting area is 2.7 billion Mu, China's planting area is more than 500 million mu, the average annual production cycle of corn is 120 days, the growth cycle is long, the temperature and humidity are high during the growth period, and the occurrence of weeds is serious. Common grass weeds include crabgrass, goosegrass, foxtail, Barnyardgrass, wild millet, teff, bluegrass, etc., common broad-leaved weeds include field...

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Problems solved by technology

[0002] Corn is the main food crop in the world, and it is also an important feed crop and industrial raw material. With the development of animal husbandry, food processing, wine making and biodiesel industries, the market demand for corn continues to increase; the global annual average planting area is 2.7 billion Mu, China's planting area is more than 500 million mu, the average annual production cycle of corn is 120 days, the growth cycle is long, the temperature and humidity are high during the growth period, and the occurrence of weeds is serious. Common grass weeds include crabgrass, goosegrass, foxtail, Barnyardgrass, wild millet, teff, bluegrass, etc., common broad-leaved weeds include field bindweed, bowl flower, purslane, quinoa amaranth, iron amaranth, spinach, commelina, velvetleaf, cocklebur , Solanum nigrum, Polygonum, etc. Common Cyperaceae weeds include Cyperus cyperus, Broken rice sedge, etc. There are many types of weeds, which have a great impact on corn yields. Effective chemical weed control can increase corn yields. With the improvement of the planting mode of cornfields in China and the change of weed populations in cornfields, the original soil pre-emergence treatment agents such as acetochlor, atrazine, and promethachlor are seriously affected by the weather, and the effect of enclosing land under drought conditions is not ideal. At the same time, the high wheat stubble and wheat bran mulch caused by mechanical harvesting cannot form an effective protective layer, and the sealing effect is poor. However, the single active ingredient variety of post-emergence herbicide is affected by the change of weed population and grass phase and the control range of the variety's own characteristics.

[0003] The use of a single species of herbicide cannot completely solve the weeds in the farmland, and will show some defects and limitations. Through the research and development of herbicide compound preparations, the scope of control can be expanded, the speed of weed killing can be increased, and the resistance of weeds can be delayed. is an important means of integrated weed control

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