Peach bark beetle
Phloeotribus liminaris (Harris)
Adult's body is brown with many punctures, from which arise yellowish hairs (A). The larva is a small, legless grub.
Most fruit-growing states and provinces in eastern North America.
Attacks peach and cherry mainly, also plum. Adults bore into healthy or unhealthy trees just beneath the outer layer of bark in the trunk or branches, causing gum to flow from the wounds (B). They leave small burrow holes filled with frass. The tunneling weakens the tree and can kill it.
This insect is very similar in form and habits to the shothole borer (Scolytus rugulosus), but its burrow hole is filled with particles of frass held together by fine silk threads, and its brood chamber runs across the grain instead of parallel to it.
Eliminate breeding places (dead trees, brush heaps, wood piles or prunings) adjacent to orchard. Maintain a balanced nutrition program to restore weakened trees; remove those that will not recover.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.