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Peach bark beetle

Phloeotribus liminaris (Harris)
Coleoptera: Scolytidae

Adult's body is brown with many punctures, from which arise yellowish hairs (A). The larva is a small, legless grub.

Distribution

Most fruit-growing states and provinces in eastern North America.

Damage

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.

Similar Species

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.

Management

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.

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