棉株上烟粉虱若虫种群的垂直分布与统计方法研究

Vertical distribution and statistical methods of the population of Bemisia tabaci on the cotton

对烟粉虱Bemisiatabaci在棉花植株上的垂直分布调查发现 ,烟粉虱在棉株各部位均有分布 ,且分布极不均匀 ,统计分析表明棉株各部位间烟粉虱的种群数量存在显著的差异。棉花顶部烟粉虱的若虫数量约占全棉株若虫总量的 1 6%,通过对棉株各部位烟粉虱的若虫数量与整株若虫总量的回归分析 。

Based on the investigation of vertical distribution of Bemisia tabaci on the cotton stems,it showed that B. tabaci can be found in all parts of the plant, but the density is significantly different among parts. For example, the amount of the nymph in the top adds up to 16% of the whole plant. Finally the regression equation on the number of the nymph in each and whole part of the cotton stems is built.