果树虚症的原因及预防在管理较为粗放的果园中，常会看到一些生长＂虚旺＂的果树。这些果树枝条差异较大，成花少，坐果率低，甚至到了结果期仍无产量。这就是果农常说的枝条＂水旺＂。枝条细而长，组织不充实，叶片薄，颜色淡，芽子瘪，是果树＂虚症＂的主要特征。虚旺的... The causes and prevention of fruit tree disease In the more extensive management of orchards, often see some growing “virtual Wang” fruit trees. These fruit tree branches vary greatly, with fewer flowers and low fruit setting rates. This is what the fruit growers often call “branches.” Branches thin and long, the organization is not full, thin leaves, pale color, buds deflated, is the fruit tree “virtual disease” the main features. Vicious ...