Can you identify this disease in redcurrants?
I have a friend who has a hectare (about 2.5 acre) of blueberries and redcurrants. They were planted last fall. The blueberries are generally doing fine now (with exceptions), but the redcurrants have yellow and brown spots on them.
Can you identify the problem? It might just be dead-simple what's happening, but we don't have a trained eye for this.
The soil was acid, which of course was the idea for both blueberries and redcurrants.
Both of them were planted in a turf/humus/manure mixture, with a pH especially for these plants.
The difference was that the blueberries were planted in half this fertilizer and half soil. The redcurrants were put in 100% of this fertilizer. Maybe it burns the roots?
Or is it some kind of nutrient deficiency?