近几年来,农药价格不断上涨,尤其是今年的农药价格上涨幅度更大。许多农民都感到压力很大。但有些农民由于缺乏农药知识,盲目购买,造成积压和浪费,也是一个重要原因,那么,在购买农药时,怎样才有做到既适用又省钱呢? 一、要明确防治对象。不同的病菌、病毒或害虫,对某种药剂的敏感程度不同。即是同一类病、虫,对农药敏感程度也不完全相同。如棉蚜和麦蚜都是蚜虫,但用乐果除治麦蚜效果较好,除治棉蚜就无能为力,因此,只有对症下药方是经济有效 In recent years, the prices of pesticides have been on the rise, especially this year’s pesticide prices have risen even more. Many farmers feel the pressure. However, some peasants are also an important reason for their lack of knowledge of pesticides and the blind purchase of backlogs. Therefore, when purchasing pesticides, how can they be both applied and cost-effective? Different germs, viruses or pests have different sensitivities to certain agents. That is the same type of disease, insects, pesticide sensitivity are not exactly the same. Such as cotton aphid and wheat aphid are aphids, but the dimethoate treatment with dimethoate better, in addition to cure cotton aphid can do nothing, so only the right prescription is cost-effective