Saskatoon Berry Fungus on Leaves?
(Foothills county, Alberta, Canada)
South of Calgary (3a-4a).
I noticed yesterday that the leaves on my Saskatoon berries were yellowing. I flipped over the leaves and found ugly bumps. I read that it was fungus and should have dealt with it at the flowering stage. Now it's at the berry stage and I tried a spray of baking soda in water, but there are far too many trees affected.
Do I need to cut them down? Or can I leave them for this year and try to prevent it next year?
Thanks for your help!