Sugar Maple Borer
Glycobius speciosus |
| USDA Forest Service. 1979. A guide to common insects and diseases of forest trees in the northeastern United States. Northeast. Area State Priv. For., For. Insect and Disease Management., Broomall, PA. p. 123, illus. |
The sugar maple borer is distributed throughout the northeastern states wherever sugar maple, its only known host, is found. Injury is indicated by ridges or raised areas on the trunk and large limbs, and sawdust-like frass and moisture on the bark.
Eggs are deposited in bark crevices, under bark scales, or around wounds, usually during July and August. The larvae feed beneath the bark. The insect spends the winter as a larvae in a chamber formed in the sapwood. The following spring, it resumes feeding. As the second winter approaches, the mature larvae bores deep into the wood and constructs a pupal cell. Before entering the cell, the larvae cuts an exit hole through which it will emerge as an adult in the spring. The adult is a robust, velvety-black beetle about an inch long. Its head is covered with fine, yellow hairs. Its back is marked with several yellow bands, those near the front forming a characteristic w-shaped design. The life cycle requires 2 years.
Adult(s);
Photo by Doug Allen, State University of New York |
Damage; scar at attack site
Photo by Doug Allen, State University of New York |
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