螟卵啮小蜂是水稻三化螟重要的卵寄生蜂，其幼虫还能取食三化螟的卵粒。

Tetrastichus schoenobii is an important egg. parasite of yellow rice borer, Tryporyza incertulas.

三化螟为害水稻的过程可以看作一个单输入——单输出系统。

The damage process of paddy stem borer to rice plant can be regarded as a single input-single output system.

养蟹稻田二化螟和三化螟螟害率是常规非防治稻田的2—3倍，甚至更高；

The damage of Chilo suppressalis and Tryporyza incertulas was about 2-3 times of that in monoculture paddy-field and even more;