I have several raspberry canes which have produced well in the past years. This year it appears that they being infected with rust (small orange/rust colour spots) and it is spreading fast. I would like to treat it in the most organic manner possible. Any suggestions? I would appreciate your help. Nina
Hi Nina: For a stem rust on berries, a lime sulfur spray or a calcium sulfate in solution will work just fine either as a dormant spray or when the plants have leafed out. If the plants have leafed out you will want to spray the entire plant including and especially the underside of the leaves. Even a sulfur dust can be helpful for you if you can find it. Lime sulfur is readily available at most any nursery supply store or perhaps a hardware store that carries gardening supplies. I use calcium sulfate every year for my home garden as an essential part of my dormant spray regimen for my amalgam of Fruit Trees that I have. Jim
