Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Maple > Small holes in trunk
Maple > Trunk/Branches > Small holes in trunk
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Maple callus borer
Synanthedon acerni
- 1/8 to 3/16 inch holes in stem near damaged bark or other wounds that may become disfigured and unattractive with high infestations
- Pupae stick out of exit hole, empty pupal cases are commonly observed after moths have emerged
- An adult moth, appearing wasp-like, has translucent wings with black markings; bluish-black antennae on a reddish-orange head and mid-section
- Silver maple is preferred host
- More information on Maple callus borer
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Pigeon tremex
Tremex columba
- 5/16 inch round exit hole, clustered on trunk
- Sometimes dead female insects remain stuck in stem
- Adults are up to 2 inches long with a reddish brown, oblong body; females have a conspicuous ovipositor on the tip of their abdomen
- More information on Pigeon tremex
