人会生病,这是谁都知道的事实;昆虫也会生病,就未必人人皆知了。这并不奇怪,因为昆虫个体小,生命周期短,生活环境又比较隐蔽,所以常常不为人们所注意。其实,在自然界里昆虫患病死亡的现象是经常发生的:当你在林间漫步的时候,也许会发现饲挂于枝干上的毛毛虫:当你在河边垂钓的时候,可能会看蓟浮于水面的死孑孓;当你在田间劳动的时候,大概捡起过尸体僵硬的玉米螟;当你在收获白菜的时候, People can get sick. This is a fact that everyone knows; insects can also get sick and they may not be known to everyone. This is not surprising, because insects are small, their life cycle is short, and their living environment is hidden. Therefore, they are often not noticed by people. In fact, the death of insects in nature is a common occurrence: When you walk through the woods, you may find caterpillars that feed on branches: When you fish near the river, you may see When you are working in the field, you probably picked up a dead corn corpse; when you were harvesting cabbage,