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Beech Borer Frass: Zipper-Like Slits on Trunk

Vertical slits packed with frass (looks like zippers) on beech >5" = beech borer (Goes pulverulentus) or oak branch borer (Goes debilis). Larvae are roundheaded, 1.5". Adults are longhorned beetles, 3-5 yr cycle. Minor damage—no treatment needed.

Beech borer

About Gardening: Tamarack: The Deciduous Conifer That Loses Needles in Fall; Confirming Shortleaf Pine and Measuring DBH Correctly; Protecting Ash from Emerald Ash Borer in Illinois; Peach Tree Borer Fatality in Mature Plum Tree; Possible Crybaby Tree (Erythrina) in Phoenix: Need Clearer Photos; Tree Fungus Identification and Management: A Gardener's Guide; Poplar Tree Identification: 6 Species by Leaf, Bark & Form; Dogwood Twig Borer: Identification, Life Cycle, and Control; Formosan Sweetgum Identified on UGA Campus; Chinaberry Tree: Weed or Wildlife Resource?

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