随着农业生产水平的提高,农民对农药的需求量也不断增加。但由于缺乏农药知识盲目采购造成积压浪费,怎样才能做到即省钱又办事,经济选购农药呢?1.明确防治对象。因为不同的病、虫,对某种药剂的敏感程度不同,既是同一类病虫对农药的敏感程度也有较大差异。如棉蚜和麦蚜都是蚜虫,用 With the improvement of agricultural production, peasants demand for pesticides has also been increasing. However, due to the lack of backlog of pesticide knowledge caused by backlog of waste, how can we do that money and services, the economic purchase of pesticides it? 1. Clear control targets. Because of different diseases, insects, a certain degree of sensitivity of different agents, both the same types of pests and insects on the sensitivity of pesticides are also quite different. Such as cotton aphid and wheat aphid are aphids, use