农药在使用中不可避免地要产生恶劣影响。一是农药毒性问题。最担心的是通过使用农药在食品残留的危险,急、慢性毒性,土壤、水、大气的污染,在生物体中的积蓄和对非靶标生物的影响等;二是农药对生态系的破坏和病虫草产生抗药性。过去非选择性的使用农药给天敌和有害生物竞争种之间很大影响,破坏了农业生态系生物间的平衡,使一部 Pesticides inevitably have adverse effects in their use. First, the problem of pesticide toxicity. Most worried about the dangers of pesticide residues in foodstuffs, acute and chronic toxicity, soil, water and atmospheric pollution, the accumulation in organisms and the impact on non-target organisms through the use of pesticides; secondly, the destruction of ecosystems by pesticides and Cordyceps produce resistance. In the past, the non-selective use of pesticides had a great impact on the competition of natural enemies and pests, undermining the balance among the agro-ecosystem organisms and enabling one