U.S. Department of Agriculture, Forest Service. 1979. A guide to common insects and diseases of forest trees in the northeastern United States. Northeast. Area State and Private Forestry, Forest Insect and Disease Management., Broomall, PA. p. 123, illus.(USDA Forest Service, Northeast Area State and Private Forestry Publication. NA-FR-4)
The pales weevil is a serious pest of young pine, spruce, fir, hemlock, juniper, larch, cedar, and cypress. It girdles and kills seedlings up to 1/2 inch in diameter and kills the ends of branches on larger trees.
The weevil overwinters either as a white grub in the roots or stump below the ground, or as an adult beneath the litter. In the former case, the larvae pupate in spring to emerge as adults in June or July; in the latter case, adults emerge from May to June. Adult feeding on the tender bark of twigs of larger trees or at the base of seedlings usually occurs after sunset. The daylight hours are spent in hiding. Heavy feeding girdles and kills the seedling, stem, or twig. Adult weevils are attracted to newly logged areas or damaged trees by the odor of fresh pine resin. They feed, mate, and lay their eggs below the root collar of either a fresh pine stump or weakened tree. Grubs begin feeding on the inner bark tissues and continue until early fall. Mature grubs construct a chip cocoon in the wood and pupate. The reddish-brown adults emerge in about 3 weeks, in late September or October. They feed on pine bark, twigs, and needles until they enter the litter to hibernate. The life cycle in the northern United States requires 2 years.