- Larvae feed in burr knot at or below the graft union, causing girdling and reduced sap flow
- Brownish-red frass (excrement) is usually present at the feeding site
- Damage is more common on dwarf trees
- 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...