Larvae: Larvae are C-shaped, legless and white with a brown head. After hatching from eggs, the larvae tunnel into the inner bark of the trunk and branches, parallel to the grain of the wood.
Adult: Ash Bark beetles are grey and brown and approximately 2-3 mm long. Adults over winter in hibernation chambers at the base of the tree (hibemacula) or in tunnels between the bark and wood of infested branches.
Damaged bark and wood: Infested branches will show entrance and ventilation holes.
Preventive tools: Not applicable
Pruned branches from infected trees should be burned or buried to destroy any larvae or beetles present.