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玉米机械化药剂除草技术,虽已实施多年,但除草效果不理想、产生药害的情况还时有发生。应让农民掌握必要的相关知识,学会规避风险,科学地实施玉米机械化药剂除草技术。一、除草剂的简单分类1.按作用方式分类(1)选择性除草剂:此类除草剂可以杀死杂草,而对某种(或某些)农作物无害。(2)灭生性除草剂:农作物和杂草接触此类除草剂都能受害或被杀死。选择性除草剂和灭生性除草剂是相对的。选择性除草剂只有在适宜用药量、施药时间、施药
Although weeding mechanization of corn mechanization has been implemented for many years, the weeding effect is not satisfactory, and the occurrence of phytotoxicity also occurs from time to time. Farmers should be required to master the necessary knowledge, learn to avoid risks and scientifically implement the mechanization of corn weeding technology. I. Simple classification of herbicides 1. Classification by mode of action (1) Selective herbicides: These herbicides kill weeds and are not harmful to certain (or some) crops. (2) Biocidal herbicides: Crops and weeds can be victimized or killed in contact with such herbicides. Selective herbicides and biocidal herbicides are relative. Selective herbicides only in the appropriate dosage, application time, spraying