Abstract:The effects of eight rice varieties,namely,the 8204,8533,Nong-hu,Ce 48,Xiushui 620,Xiushui 664,Xiushui 678 and Shanyou 6,oneleven parameters related to the development,survival and reproduc-tion,etc.of brown planthopper Nilaparvata lugens St(?)l(BPH)popul