一、食叶对树木的影响 由食叶害虫和其它原因引起阔叶树衰弱的症状是相似的,这些症状包括:早季的缺绿叶;由树冠上部芽和小枝枯死开始,最后导致大枝枯死和树冠稀疏;以及沿着树干和枝节长出萌条。这些症状,是淀粉贮存减少或耗尽等一系列树木生理变化的反应。 First, the effect of leaf on trees The symptoms of decay of broadleaf trees caused by leaf-feeding pests and other causes are similar, including: the lack of green leaves in the early season; the beginning of the shoots and branchlets from the upper canopy, leading to the death of large branches and the sparse canopy ; And the growth of sticks along the trunk and branches. These symptoms are the response of a series of tree physiological changes, such as the reduction or depletion of starch storage.