These develop white centers which may fall out. These spots remain small. Spur Blight . Spur blight is caused by the fungus Didymella applanata . It affects black raspberry, red raspberry , blackberry, and black-red raspberry hybrids.
Spots appear on new canes in mid-to late summer.
Spots on leaves of first-year canes begin at the edges and grow inwards, following the veins. The spot is V-shaped, and brown with yellow edges. The entire leaf is usually pale. Leaves usually fall off. The fungus grows through the leaf, and into the cane.