White Pine Weevil

White Pine Weevil

This insect had a banner year in 2013, killing the terminal shoots of white pine, spruce and fir across RI. The adult weevil overwinters in the duff and soil beneath the host trees becoming active as soon as the daily temperature reaches 50ᵒF. The adult weevil climbs up the trunk to the top of the central leader laying its eggs under the bark.

Hatching larvae, then, feed on the vascular cambium, killing the terminal leader in the process. Apply a registered pesticide in April to manage the adults before they lay their eggs. Only spray the terminal leader, not the entire tree.