拟囊状幼虫

例句：

1. 1. The nematode larvae are the first stage of the insect life cycle.
   拟囊状幼虫是昆虫生命周期的第一个阶段。
2. 2. The nematode larvae feed on plant roots, causing root rot.
   拟囊状幼虫以植物根部为食，导致根腐病。
3. 3. The nematode larvae can be controlled by using pesticides.
   通过使用杀虫剂可以控制拟囊状幼虫。