农田杂草种类繁多，同一种杂草不同地域的农民给它起的俗名又不相同，而它的学名却只有一个，因此除草剂说明书只能按杂草的科属、学名来介绍它的防治范围。而相当一部分农民由于文化水平较低，专业知识少，他们很难完全看懂说明书，尤其是新农药，往往用错造成防效不好或产 Weeds of a wide range of farmland, with the same weeds in different regions of the peasants to give it the common name is not the same, but its only one scientific name, so the herbicide brochure can only weed species, scientific name to introduce its control range. However, due to their low level of education and a small amount of professional knowledge, a considerable proportion of peasants have difficulty understanding the instructions completely, especially for new pesticides.