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本文重点论述了树冠体积在赤松毛虫防治管理中的作用。根据冠幅、冠高确定树冠体积,从幼虫期食叶总量3323.17 cm得出树体最大载虫量,通过回归方程(?)(载虫量)=2.1016+27.1957x(树冠体积)可找出不同树冠体积对赤松毛虫的允许发生量。
This article focuses on the role of canopy volume in the control of Cicada caterpillar. According to the crown width and crown height, the crown volume was determined. The maximum amount of parasitic worms in the tree body was obtained from the total leaf litter length of 3323.17 cm. The regression equation (?) (Vector) = 2.1016 + 27.1957x (crown volume) The crown volume of different crown dendrolimus permissible amount.