boysenberry leaf spots

Asked August 8, 2020, 7:00 PM EDT

My boysenberry leaves have black spots. The leaves are turning colors and dying. Is this a disease? Can i prevent it?

Washington County Oregon

1 Response

Thank you for your question. It would appear to be the fungal disease described here: https://pnwhandbooks.org/plantdisease/host-disease/blackberry-rubus-spp-septoria-leaf-spot Only the chemical treatments marked "H" are available to homeowners, and must be used per label directions. If you have other questions, please write back!