施用化学农药防治害虫,必须慎重选择适当的农药种类,和最安全的时间及方法。否则不仅浪费,而且可能大量杀伤蜜蜂,并杀灭某些害虫的天敌益虫,严重破坏害虫与天敌之间的自然平衡而导致害虫的大量发生为害。很多农药对蜜蜂和其它益虫的毒性极大,但也有若干毒性较小或相对无毒。除非 The use of chemical pesticides to control pests, we must carefully select the appropriate type of pesticide, and the safest time and methods. Otherwise, it is not only wasteful, but also kill a lot of bees and kill natural enemies of certain pests, which will seriously damage the natural balance between pests and natural enemies and lead to a large number of pests. Many pesticides are extremely toxic to bees and other beneficial insects, but there are several that are less toxic or relatively non-toxic. unless