随着耕作栽培制度的改革,杂交稻种植面积扩大,有利二化螟生存繁殖。它对水稻危害日趋严重,已成为水稻的主要害虫。过去对螟虫越冬后虫口密度多侧重于稻桩内虫量的调查,对稻草内越冬虫量重视不够。全国农作物病虫测报办法亦强调检查稻桩内螟虫为主,结果与实际情况差 With the reform of tillage and cultivation system, the planting area of ​​hybrid rice is enlarged, which is favorable for the survival and breeding of Chilo suppressalis. It has become more and more harmful to rice and has become a major pest of rice. In the past, overwintering stem borers population density of insects more emphasis on the amount of rice stub investigation, the amount of overwintering insects in the straw enough attention. National crop pest reporting method also emphasizes the inspection of rice stem borers based, the results and the actual situation is poor