蚜虫是农作物的敌人,它们以吸食植物的汁液为生,大量繁殖的蚜虫会让农田减产,甚至颗粒无收。除了喷洒农药消灭蚜虫之外,科技人员发现,寄生蜂是蚜虫的自然界天敌,它们会把卵产在蚜虫的体内,当卵变成寄生蜂幼虫后,幼虫会从蚜虫体内吃它的身体,让其毙命。利用寄生蜂控制蚜虫的数量,是农业中一种很环保的防蚜虫方法。让科技人员感到奇怪的是,有时寄生蜂能够很好地完成任务,消灭大部分的蚜虫,但有时,大量的蚜虫在寄生蜂的攻击下,依然我行我素,活得很滋润。为何寄生蜂的攻击效果会时灵时不灵呢? Aphids are the enemies of crops that depend on plant-based juices for their livelihood. Large-scale aphids can reduce farm yields and even crop up. In addition to spraying pesticides to eliminate aphids, scientists found that parasitoids are naturally aphrodisiac natural enemies that lay their eggs in the aphids’ body. When the egg becomes a parasitic wasp, the larvae eat their body from the aphids and allow It killed. The use of parasitoids to control the amount of aphids is a very environmentally friendly method of preventing aphids in agriculture. To the surprise of scientists, parasitoids sometimes do their job well and kill most aphids, but sometimes a large number of aphids still survive without parasitic bees. Why parasitic bee attack effect when the spirit is not working?