William M. Ciesla, Forest Health Management International, Bugwood.org

William M. Ciesla, Forest Health Management International, Bugwood.org

William M. Ciesla, Forest Health Management International, Bugwood.org

William M. Ciesla, Forest Health Management International, Bugwood.org

Steve Passoa, USDA APHIS PPQ, Bugwood.org

Jim Stimmel, Pennsylvania Department of Agriculture, Bugwood.org

Jim Stimmel, Pennsylvania Department of Agriculture, Bugwood.org

Pest and Diseases Image Library , Bugwood.org

Pest and Diseases Image Library , Bugwood.org

Pest and Diseases Image Library , Bugwood.org

Pest and Diseases Image Library , Bugwood.org

Pest and Diseases Image Library , Bugwood.org

Pest and Diseases Image Library , Bugwood.org