Herbicide composition for cornfield

Abstract

The invention relates to a weedicide combination for preventing and curing weeds in cornfield. The weedicide combination is made from cyanazine, tribenuron-methyl and corresponding accessory agent and / or filling, wherein, the weight proportion of the cyanazine and the tribenuron-methyl is 2:0.01 to 1; the sum of the weight of the cyanazine and the tribenuron-methyl takes 10 to 90 percent of the total weight of the combination. The cyanazine and the tribenuron-methyl are used together, which enlarges the weed control spectrum and can solves most single cotyledons weeds and double cotyledons weeds in the cornfield at present, such as cleavers, sun euphorbia, speedwell, polygonum convolvulus, wild oat, stiff grass, blue grass, amur foxtail, etc., and the weedicide combination of the invention is used before winter, which can effectively control the weeds of the cornfield for the whole growing period. The cyanazine and the tribenuron-methyl in the weedicide combination have synergized action after being combined and confected, which reduces dosage and cost and is safe for wheat and after crop.

Description

technical field [0001] The invention relates to an agricultural chemical composition, in particular to a herbicide composition for controlling weeds in wheat fields. Background technique [0002] Wheat is one of the most important food crops in the world, and the annual wheat planting area in my country is about 30 million hectares 2 , accounting for 27% of the sown area of ​​grain, and the annual output of wheat is about 100 million tons, accounting for 22% of the total grain output. In addition to diseases and insect pests, weed damage is also an important aspect of the factors that endanger wheat production and affect the quality of wheat products. Weeds are non-target cultivated plants in farmland. Their main hazards are to compete with crops for water, fertilizer, light, and space, and they are also intermediate hosts of crop diseases and insect pests. The area of ​​wheat field weed damage in my country accounts for about 30% of the wheat planting area, of which the s...

AI Technical Summary

Problems solved by technology

However, tribenuron-methyl has poor control effect on monocotyledonous weeds, and cannot effectively control monocotyledonous weeds such as wild oats, hard grasses, bluegrass, and kangaroo

Moreover, the susceptibility of various broad-leaved weeds to tribenuron-methyl is very different. When used at the recommended dose (0.7-1.0g / mu), boniangjian, mangcai, mustard greens, chamomile, chickweed, etc. are sensitive. However, it is less sensitive to lacquer, mother-in-law, curly radish, etc., and it is not very sensitive to flat storage and perennial field bindweed, spiny vegetables, etc.

At the same time, the perennial and large-scale single use of tribenuron-methyl has greatly reduced the population of the above-mentioned sensitive weeds, resulting in changes in the grass phase of wheat fields, and some weeds that are not sensitive or resistant to tribenuron-methyl have become the main weeds, such as Weeds such as cattail, Zeqi, Popona and other weeds occur more seriously in Henan, Hebei, Shandong, Anhui and other regions, and become the main weeds in wheat fields.

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