Management: Avoid leaving tree wrap on for more than a season. Larvae may be found injuring the bark underneath tree wrap that has been left on for extended periods of time. If injury is not extensive, damaged areas of bark can be cut back to healthy tissue and larvae can be removed. Keep newly planted trees and shrubs well watered and mulched, as stressed plants are more prone to injury by this insect. Adults are stouter than either two-lined chestnut borers or bronze birch borers.

• MSU Diagnostic Services for assistance in pest identification.
• MSU Landscape Alert newsletters for information about the current growing season, pest concerns and plant advice.