【摘要】 本文研究了不同光周期条件对烟粉虱实验种群的影响 ,发现光周期对其种群增长影响显著 ,表现为光照时间越长 (9- 18小时 ) ,越有利于该虫的发育 ,其发育速率、存活率、成虫寿命及产卵量、种群增长指数都随之增大。研究表明 ,至少在 12小时以上的光照条件下 ,才有利于烟粉虱种群的增长。更多还原

【Abstract】 The effect of photoperiod is remarkable on the experimental population of sweetpotato whitefly, Bemisia tabaci (Gennadius). When the photoperiod is longer (9-18 hours), the development rate, survial rate, adult oviposition and longevity are higher, and also higher for the index of population growth of sweetpotato whitefly. In order to rear sweetpotato whitefly for mass rearing of the ladybeetle Delphastus catalinae , the lighting time should exceed 12 hours.更多还原