Herbicidal composition and application thereof

Abstract

The present invention discloses a herbicidal composition, containing 1 part by weight of 2,4-D isooctyl, 0.01-90 parts by weight of metribuzin and 0.05-50 parts by weight of metolachlor. The invention also provides application of the above herbicidal composition in the prevention and control of weeds in crops. Through the above technical solution, the herbicidal composition of the present invention can achieve significant synergic control effect, thus improving the performance of the herbicide.

Description

Technical field [0001] The present invention relates to the field of agriculture, in particular, to a herbicide composition and the use of the herbicide composition. Background technique [0002] Farmland weeds generally refer to plants that are not cultivated in the field of crops. Farmland weeds survive long-term adaptation to local crops, cultivation, farming, soil, climate and other ecological environment and social conditions, and damage crops in many ways. It competes with crops for water, fertilizer, light energy, etc., invades above and underground space, affects crop photosynthesis, interferes with crop growth, and affects yield and quality. Many weeds are intermediate hosts of pathogens and pests that harm crops. Weeds are the enemy of agricultural production. If weeds are not eliminated, crop yields will eventually decrease. The main weeds that harm crops include crabgrass, barnyardgrass, setaria, goosegrass, wild oats, amaranth, iron amaranth, purslane, dayflower, c...

AI Technical Summary

Problems solved by technology

[0003] At present, the main types of herbicides used to control weeds in farmland are: amide herbicides, such as butachlor, acetochlor, etc. Compared with metolachlor, these herbicides are less safe for corn, and the early temperature in the north Low, inhibits the growth and development of corn, not long in the early stage, high temperature in the later stage, excessive growth, greedy green and late maturity, corn grain moisture, reduced yield and poor economic benefits; Triazine herbicides: such as atrazine, cyanazine, etc., such herbicides The safety of crops is greatly affected by environmental conditions and crop growth periods, especially when it rains after application, phytotoxicity is prone to occur, and the residual effect period is long. Long-term large-scale use will easily cause groundwater pollution, ecological environment deterioration and damage to subsequent crops. Safety is affected; sulfonylurea herbicides: such as nicosulfuron, rimsulfuron, thifensulfuron, etc. These herbicides are usually used for stem and leaf treatment, and the sensitivity of different corn varieties to such agents There are differences, the probability and severity of phytotoxicity are high, which can easily lead to increased tillering of corn, and phytotoxicity will occur when high temperature is encountered during spraying, and the herbicidal spectrum is narrow; imide herbicides: such as fluorfen , flufentate, indoxafen, etc., are mainly used to control broad-leaved weeds, especially for cocklebur, black nightshade, velvetleaf, quinoa, morning glory, purslane, etc.

[0004] With the increase of dosage and frequency of herbicide application, weeds gradually increase their resistance to existing herbicides, resulting in the disadvantage of low control effect of herbicides

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