Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Crab Apple > Hole in trunk
Crab Apple > Trunk > Hole in trunk
1 of 1
Dogwood Borer
Synanthedon scitula
- Larvae feed in young trees often around lawn mower injuries, and in pruning scars of older trees
- Feeding causes girdling and reduced sap flow
- Brownish-red frass (excrement) is usually present at the feeding site
- Adult is a black and yellow clear-wing moth, larvae are ½" long when mature, and white with a red-brown head
- Adult emergence begins in mid-June, peaks in early July, and continues until August
- More information on Dogwood Borer