除草剂概述除草剂也叫除莠剂,用除草剂除草,叫化学除草。它的好处是:高效、低毒、杀草种类多、选择性强、省工,还能促进作物增产。1978年黑龙江友谊农场五分场二队对1万亩农田使用化学除草,消灭了草荒,增产显著,省工3万个;左云县小京庄大队在10亩麦田上试用20％2甲4氯除草,杀草效 Herbicide Overview Herbicide also known as herbicide, weeding herbicide, called chemical weeding. Its advantages are: efficient, low toxicity, grass-killing species, selective, labor-saving, but also to promote crop yield. In 1978, the Heilongjiang Friendship Farm five teams field team of 10,000 acres of farmland to use chemical weeding, eliminating the grass shortage, yield significantly, labor-saving work of 30000; Zuoyun Xiaojiazhuang Brigade in 10 acres of wheat on a trial of 20% 2 A 4 Chlorine weeding, herbicidal effect