White pine weevil can be a serious pest of ornamental plantings of pines and blue spruce in high elevations.  Feeding by the larvae of the insect causes the terminal to suddenly wilt and die in early summer.  Pine weevil can be controlled by applying insecticides in spring when adult weevils are feeding  on trees and laying eggs.  Mechanical removal of infested terminals while the insects are still present can provide some future control if other sources of weevils are not in the area.  To save the natural form of the tree new leaders can be trained by tying upper branches so they develop as the terminal.