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 of plants.
Northern part of United States.
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.
Notice: Because pesticide labels can change rapidly, you should read the label directions carefully before buying and using any pesticides. Regardless of the information provided here, you should always follow the latest product label when using any pesticide. If you have any doubt, please contact your local Extension agent or pesticide dealer for the latest information on pesticide label changes.
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Prepared by Alexandra Spring and Eric Day (Modified from a publication by the USDA)