不同密度条件下扶桑绵粉蚧翅形分化初步研究

摘要

Primary research on wing type differentiation of Phenacoccus solenopsis Tinsley under equivalent environment condition (25 ± 1℃, 65% ～80%RH,12 hours full light and feed by cotton seedling) , and different densities was studied. . The results showed that female and male proportions were 0. 31:0. 11 under low population density, 0. 26- 0. 17 under middle population density, and 0. 52:0.48 under high population density. The results indicated that the birth rate of male was increased with the population density.%对不同密度条件下的扶桑绵粉蚧翅型分化进行了初步探讨.研究发现,扶桑绵粉蚧在温度25±1℃,湿度65％～80％,12 h全光照条件下,取食苗期棉花,种群在低密度时雌雄比例为0.31∶0.11,中等密度时雌雄比例为0.26∶0.17,高密度时雌雄比例为0.52∶0.48.由此可见,随着种群密度的增加,产雄的机率也随之增加.