杂草,俗称野草,多为一年生或越年生草本植物。杂草,种类繁多,世界上杂草约有5万种,其中,农田杂草8000多种。我国农田杂草,大约有500种左右,其中,主要为害杂草约20种上下。我国地域宽广,气候悬殊、土质各异、作物种类不同,杂草群体分布也有很大差异。一般说来,北方农田杂草主要有稗草、芦苇、灰菜、蒲公英、车前、狗尾草、荠菜、胖姑娘、马齿苋、马唐、燕麦草、田旋花、白茅草、刺儿菜、苍耳、列当、菟丝子等。南方农田杂草主要有稗草、光头 Weeds, commonly known as weeds, mostly annuals or perennials. Weeds, a wide variety of weeds in the world about 50,000 species, of which more than 8,000 kinds of farm weeds. China’s farmland weeds, about 500 species, of which mainly about 20 kinds of weed damage up and down. China has a wide geographical area, a wide range of climates, different soil types, different types of crops, and great differences in the distribution of weed populations. In general, weeds in the north of the main barnyard grass, reeds, gray vegetables, dandelion, car, Setaria, shepherd’s purse, fat girl, purslane, crabgrass, oat grass, , Cocklebur, column when, dodder and so on. South weeds are mainly barnyard grass, bald