The Dogwood Borer (Synanthedon scitula) is a clearwing moth whose larvae bore into the trunks and branches of dogwood trees and other hardwood species. It is considered one of the most important pests of ornamental dogwood trees in North America.
Taxonomy and Classification
- Order: Lepidoptera
- Family: Sesiidae
- Genus: Synanthedon
- Species: Synanthedon scitula
Physical Description
Adult dogwood borers resemble small wasps due to their narrow bodies and transparent wings. This mimicry likely helps protect them from predators.
The larvae are creamy white caterpillars that tunnel beneath the bark of host trees.
Distribution and Habitat
Dogwood borers are widely distributed throughout eastern North America. They are most commonly found in ornamental landscapes and forests where dogwood trees grow.
Behavior and Damage
Female moths lay eggs on damaged bark or wounds. After hatching, larvae tunnel beneath the bark, feeding on cambium tissue.
Damage may appear as:
- Sawdust-like frass near entry holes
- Swollen bark areas
- Declining tree health
Infestations can weaken trees and make them more vulnerable to disease or environmental stress.
Management
- Avoid damaging tree bark
- Maintain tree health
- Monitor trees for signs of infestation