【摘要】 棉花粉蚧是近年来入侵我国的重要害虫,关于该虫在我国的入侵种群的生殖方式缺乏详细研究。本文在室内条件下对棉花粉蚧浙江金华种群的生殖方式进行了观察。结果显示孤雌生殖的棉花粉蚧可以产下雌性和雄性后代。孤雌生殖的棉花粉蚧的产卵前期为14.8 d,显著长于两性生殖的6.9 d;孤雌生殖的棉花粉蚧所产后代为348.3头,显著少于两性生殖的棉花粉蚧的494.1头;孤雌生殖的棉花粉蚧的雌虫总历期为57.2 d,明显长于两性生殖的32.8 d。但这2种生殖方式产下后代的性比差异并不显著,孤雌生殖的为1.1,而两性生殖的为1.2。该棉花粉蚧种群的生殖方式为兼性产两性孤雌生殖。更多还原

【Abstract】 Cotton mealybug Phenacoccus solenopsis Tinsley( Hemiptera: Pseudococcidae) has become a serious threat to agricultural crops,particularly cotton in China since 2008. The reproductive mode of P.solenopsis remains controversial. This paper investigated patterns of reproductive modes in cotton mealybug of Jinhua population under laboratory condition. The virgin females of cotton mealybug have both male and female offspring. The result showed that the preoviposition period,the number of offspring and life span were significantly different between virgin females and mated females. The preoviposition period of virgin females was 14. 8 d,while that of mated females was 6. 9 d. The number of offspring of virgin females was348. 3,while that of mated females was 494. 1. The average life span of virgin female was 57. 2 d,while that of mated female was 32. 8 d. There was no significant difference between sex ratio of virgin and mated females. The results showed the reproduction mode of this mealybug is facultative deuterotoky.更多还原