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用种群生物量代替种群数量作为统计温室白粉虱种群,既能代表种群数量的多少,又能反映不同虫态白粉虱危害程度的大小。不同初始虫量处理的种群生物量变化动态均与时间呈Logistic曲线关系。初始种群大的处理,各个时间的种群生物量都大。 黄瓜叶片光合作用强度,糖、叶绿素、蛋白质含量与种群生物量的大小呈负相关。其中叶片含fos量的变化与种群危害的程度吻合较好;植株孕蓄——开花期是抗逆能力较弱的时期,也是温室白粉虱种群迅速上升的时期,白粉虱的累积危害效应一般在这个时期反映出来,这个时期应是综合防治的关键时期。
Replacing population quantity with population biomass as a statistical population of B. tabaci can not only represent the population quantity but also the degree of harm of B. tabaci in different stages. The dynamic changes of population biomass with different initial insect populations showed a Logistic curve with time. The initial population of large processing, population biomass at each time are large. The photosynthesis intensity, sugar, chlorophyll, protein content of cucumber leaves were negatively correlated with the biomass of the population. Among them, the change of fos content in leaves was in good agreement with the degree of population damage. Plant pregnancy-flowering stage was a period with weak resilience and rapid increase in population of B. tabaci. The cumulative hazard effect of B. tabaci was Reflected in this period, this period should be the key period for comprehensive prevention and control.