温室白粉虱的种群动态及其对黄瓜生理生化特性影响的研究

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。

STUDIES ON THE POPULATION DYNAMICS OF GREENHOUSE WHlTEFLY(TRIALEURODES VAPORARIORUM WESTW.)AND ITS INFLUENCES ON THE PHYSIOLOGICAL ANDBIOCHEMICAL CHARACTERISTICS OF CUCUMBER PLANTS

In this paper population biomass was used instead of population quantity of measurement for the population dynamics of greenhouse whiteflies and its injury to host plants. The;lcgistic equations of population biomass in three treatments were postulated, in which, the population growth rate increased with higher initial population biomass.The physiological functions of cucumber plants were seriously affected by the infection of greenhouse whiteflies. Total nonstructural carbohydrates, photosynthesis rate, ch...