Abstract: The development and reproduction of the small brown planthopper (SBPH) on 57 plants including Oryza sativa, Zea mays, Sorghum vulgare and Echinochloa crusgalli were studied by the caging method in laboratory. The results indicated that nymphal development duration, emergence rate, adult weight, adult longevity and fecundity of SBPH on different plants were significantly different. According to principal component analysis and population trend index analysis, five plants (Echinochloa crusgalli etc.) were the most suitable host plants, with the emergence rates of SBPH on these plants ranging from 59.4% to 86.9%, and the population trend indexes above 27.8. Nine plants (Lolium perenne etc.) were also suitable for the small brown planthopper, 27.0%-64.5% individuals could emerge on those plants with the population trend indexes above 10. Five plants such as Eleusine indica were scarcely suitable for the survival of SBPH, with 13.0%-35.6% emergence rate, and 1-10 population trend index. Thirteen plants (Bromus inermi etc.) were unfit for SBPH’s survival, less than 10% individuals could emerge on them, with the population trend indexes below 1. Nymphs of SBPH on other twentyfive plants such as Zea mays could not emerge. Lolium maloiforam, Beckmannia syzigachne, Polypogon fugax, Poa acroleuca, Avena fatua and Capsella bursapastoris were the newlyconfirmed host plants.

Key words: small brown planthopper, host plant, population parameter, principal component analysis, fitness

摘要： 通过室内笼罩饲养法观察了水稻、玉米、高粱、稗草等57种植物上灰飞虱Laodelphax striatellus（Fallén）的生长发育繁殖情况。不同供试植物上灰飞虱羽化率、若虫历期、初羽化成虫体质量、成虫寿命和产卵量等参数均存在不同程度的差异。结合主成分分析和种群趋势指数分析，发现57种供试植物中，适宜灰飞虱生存的寄主植物有稗草等5种，这些植物上灰飞虱羽化率介于59.4%~86.9%，种群趋势指数在27.8以上；较适宜灰飞虱生存的寄主植物有黑麦草等9种，灰飞虱羽化率在27.0%~64.5%，种群趋势指数多在10以上；较不适宜灰飞虱生存的寄主植物有牛筋草等5种，羽化率介于130%~35.6%，种群趋势指数为1~10；不适宜灰飞虱生存的植物有无芒雀麦等13种，羽化率在10%以下，种群趋势指数在1以下；玉米等25种植物上灰飞虱若虫不能羽化为成虫。其中,黑麦草、棒头草、菵草、白顶早熟禾、野燕麦和荠菜等为新证实的寄主植物。

关键词: 灰飞虱, 寄主植物, 种群参数, 主成分分析, 适合度