White pine weevil eggs are small, pearly white and translucent. Mature larvae are yellowish-white, legless grubs with brown heads. This weevil infests other pines and spruces, especially Norway spruce. In mid June, infested branches begin to wilt. One or more of the top branches grow upward to replace the leader which results in a crooked or multiple trunk tree.
Adults feed on the buds and bark to a limited extent.
Adults overwinter in litter. In mid to late spring after new growth has emerged on white pines, the adults emerge and crawl or fly to the new top growth. These weevils feed on the succulent bark 7 to 10 inches below the top most bud. Eggs are deposited in a ring around the leader in about a week. The larvae hatch 1 or 2 weeks later.