Verticillium wilt, caused by the fungus Verticillium spp. also causes wilting of raspberries. Black raspberries are most susceptible to Verticillium wilt. It is most common when raspberries are planted after potatoes, tomatoes, or other solanaceous crops or weeds. Canes acquire a bluish cast during wilting. Verify diagnosis with a laboratory test.
More information:
- Verticillium Wilt of Brambles -(Pennsylvania State University)
- Verticillium Wilt of Raspberry – (Ohio State University)
- Notes on Raspberry Diseases: Verticillium wilt (bluestem) -(OMAFRA)
- Verticillium Wilt of Caneberries -(University of California)
- Raspberry Verticillium Wilt -(Oregon State University)
Use these resources if you need additional help with diagnosis and to find solutions to your problem.