Larva: White, grub like, 1/4 to 1 1/4 inches long. Egg: Oval, deep reddish brown, about 1/16 inch long, laid under surface of leaf. Adult: Clear winged moth that resembles a common wasp; black body crossed by yellow bands.
Blackberry, dewberry, and raspberry.
In fall the young larvae burrow into the bark of plants, near the soil. Older larvae hollow out crowns
Northern part of United States, but can occur in Virginia.
Remove and destroy infested canes and crowns in early spring or fall.
No known organic/biological control known for raspberry crown borer at this time.
Use a registered insecticide drench crowns and lower 2 feet of canes between October 1 and March 1.
Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.
Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Alan L. Grant, Dean, College of Agriculture and Life Sciences; Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; Jewel E. Hairston, Administrator, 1890 Extension Program, Virginia State, Petersburg.
April 25, 2011