前言农田杂草种类很多,它与农作物争养料、争阳光、争水分,还能传播病虫害,是妨碍作物正常生长发育,影响作物产量的一主要大害。防除农田杂草,乃是农业增产必不可少的生产措施。但是,如何防治得好:即省工、耗费少、效果好、经济效益高,就得了解杂草的 Introduction There are many kinds of weeds in farmland. It competes with crops for sunlight, contends for water, and transmits pests. It is a major impediment that hinders the normal growth and development of crops and affects crop yield. Control of weeds in farmland is an essential measure of agricultural production. However, how to control well: that is, labor-saving, less cost, good effect, high economic efficiency, we must understand the weed