Weymouth-Kiefer
The larvae feed on "Pinus" species, mainly "Pinus strobus" and "Pinus sylvestris". First instar larvae enter shoots behind needle fascicles, boring directly into the pith. They initially feed downward toward the base of the shoots but later reverse direction. The frass is deposited on either end of the tunnel. Pupation takes place in a silken cocoon on the ground.