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Red Oak Borer


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Red Oak Borer. Learn about the red oak borer, a native insect that feeds on living oaks and can cause tree decline or death. Larvae feed beneath the bark for the first year,.

Red Oak Borer Enaphalodes rufulus
Red Oak Borer Enaphalodes rufulus from bugguide.net

Eggs are laid beneath the scales of the bark on living oak (or sometimes maple) trees. Red oak borers are fairly large beetles in the longhorn family that may reach lengths up to 28 mm (1 1/4 inches). The red oak borer is a brown, longhorn beetle about an inch long.

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Red Oak Borer Enaphalodes rufulus

The males have antennae twice as long as their body, females have shorter antennae that are about the same length as their bodies. As wood borer larvae feed on red oak heartwood, they leave visible tunnels. Like all longhorn beetles, the red oak borer beetle has antennae that are much longer than the beetle's actual body. The red oak borer is a brown, longhorn beetle about an inch long.

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