The effects of genetic purifying by continuous sibling cross on the damaging character of biotype 1 and biotype 2 of Brown Planthopper (BPH) were studied in this paper.

• 采用标准苗鉴法,系统考察了褐飞虱生物型1和生物型2的致害特性在连续五代家系纯化过程中的变化状况。