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选择性除草剂是一类能杀死杂草或严重抑制杂草生长而又不大伤害庄稼的农药。除草剂仅在一定的范围内对某些作物具有选择性,其选择的范围取决于多种因素。由于在任何地区都存在着植物、环境和除草剂之间复杂的相互关系,这些关系变化无常,环境条件与施药方法不同,除草剂的灭草效果亦不一样。了解化学除草的选择性,有助于提高除草的效果。植物的作用植物(包括杂草和作物)对除草剂的反应受其遗传、叶龄、生长速度、形态和生理以及生物物理和生物化学过程等因素的影响,不同属(genus)的植物反应是不同的,而同属植
Selective herbicides are a class of pesticides that kill weeds or severely inhibit the growth of weeds without damaging crops. Herbicides are selective to certain crops only to a limited extent, and the range of their choice depends on many factors. Because of the complex interdependence of plants, environments and herbicides in any region, these relationships vary and the environmental conditions are different from those applied. Herbicidal effects are also different. Understanding the selectivity of chemical weeding helps to increase the effectiveness of weeding. The role of plants The response of plants (including weeds and crops) to herbicides is influenced by their inheritance, leaf age, growth rate, morphology and physiology, and biophysical and biochemical processes, and the plant response to genus Different, but belong to the same plant