Adult and nymph of tobacco whitefly often clustered on the back of leaves and they could secretted a lot of honeydew which polluted the leaves and fruits and induced disease occurrence.

 
  • 烟粉虱成虫和若虫常群集在叶片背面,能分泌大量的蜜露,污染叶片和果实,诱发病害发生。
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