Crab Apple > Trunk > Hole in trunk
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- 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...