Abstract: The bionomics of biotype 2 population of brown planthopper (BPH), Nilaparvata lugens Stal, was compared between BPH population continuously reared on rice resistant variety Mudgo and BPH population purified from paddy-field population collected in Guangxi Province, China. The results indicated that both populations could infest rice varieties Mudgo and IR26 bearing resistant gene Bph1, however, the biotype 2 population from field had higher virulence to rice variety ASD7 and IR36 with resistant gene bph2 than those from greenhouse. The biotype 2 population reared in greenhouse had longer nymphal duration than those from paddy field when they were caged on different rice resistant varieties. Both biotype 2 populations had the lowest nymphal survival, weight of female adult, fecundity, honeydew, net reproductive rate, and the longest nymphal duration on resistant variety ASD7. A significantly higher nymphal survival index and net reproductive rate were found on rice resistant variety IR26 in field population than those in greenhouse population. It is suggested that the variety IR26 should be as an optimal resistant rice variety to monitor the virulence of BPH population and evaluate the resistance of rice to BPH.

Key words: brown planthopper, biotype, rice resistant variety, bionomics

摘要： 比较研究了采自菲律宾国际水稻研究所室内长期用水稻抗性品种Mudgo驯化的褐飞虱生物型2和从广西田间褐飞虱种群中分离获得的田间生物型2的致害性、在不同抗性品种上的生长发育和生殖等特性。结果表明室内和田间生物型2对Mudgo和IR26的致害能力相同，即两者均能成功地致害含[WTBX][STBX]Bph1[WTBZ][STBZ]基因的水稻品种，但田间生物型2对ASD7和IR36的致害性明显比室内生物型2强，说明两者在具有抗性[WTBX][STBX]bph2[WTBZ][STBZ]的水稻品种上的致害性有差异。取食不同抗性品种时，田间生物型2的若虫历期均比取食相同品种的室内生物型2短，两个生物型2在取食ASD7时的若虫历期最长、存活率最低、雌成虫体重最轻、产卵量和蜜露量最少、种群增长指数和营养指数最低。取食IR26的田间生物型2的若虫存活指数和种群增长指数均明显高于取食IR26的室内生物型2的指数，同时也显著高于取食Mudgo的生物型2。建议在进行褐飞虱致害性监测和水稻品种抗性评价时以选用IR26为宜。

关键词: 褐飞虱, 生物型, 水稻抗性品种