spots on grapes - Ask Extension
I have concord grapes that are developing black spots on them. Is this black rot and if so what do I need to control this? I have had these grapes...
Knowledgebase
spots on grapes #197545
Asked July 08, 2014, 10:53 AM EDT
I have concord grapes that are developing black spots on them. Is this black rot and if so what do I need to control this? I have had these grapes over 20 years without this problem. Problem seems to be mostly on the south side of plant.
Tuscola County Michigan
Expert Response
That does not look like black rot in grapes.
http://grapes.msu.edu/uploads/files/Diseases_PDFs/BlackRot.pdf
It looks a lot more like a spray burn from a pesticide application. Have you sprayed the grapes recently? What is located on the south side of the vines which may have been sprayed?
