Discussions on the experimental technique on biotype of the brown planthopper(Nilapavata lugens).
											  
												Author of the article:GU Zheng-Yuan,ZHANG Cun-Zheng,LIU Xian-Jin,XIAO Ying-Fang
												Author's Workplace:(Institute of Plant Protection of Jiangsu Province Academy Agricultural Sciences, Nanjing 210014,China).
												
												Key Words:brown planthopper (Nilapavata lugens);  biotype;  virulence
												
												Abstract:Bioassay method and rice strains used in the monitoring  biotype of the brown planthopper (Nilapavata lugens) were so different for different scientists that different conclusions on the biotype occurred frequently.The authors suggested that the Mu