一、为害特点白粉虱俗称小白娥，是北方保护地蔬菜的主要害虫。它主要危害黄瓜和西红柿，对温室种植的其他蔬菜危害较轻。为害时从成虫和若虫吸食植物汁液，被害叶片退绿变黄，甚至全株死亡。此外，这种害虫尚能分泌大量的蜜露，污染叶片和果实，引起煤污病的发生，造成减... First, the harmful characteristics Whitefly, commonly known as small white E, is the main pest of vegetables in the northern protected areas. It mainly harms cucumbers and tomatoes, and harms other vegetables grown in greenhouses. Harmful from the adults and nymphae ingestion plant juice, the victim leaves back green turn yellow, and even the whole plant died. In addition, this pest is still able to secrete large amounts of honey dew, polluting leaves and fruits, causing the occurrence of coal pollution, resulting in reduced ...