How Do You Control Black Spot On Roses?
Black spot is a fungus disease that appears as round, black spots on the leaves of rose plants. There may be a distinctive yellow band around the black spot and leaves may fall prematurely. Left untreated, black spot may infect young canes. Look for black spot on the leaves of rose plants. This fungus disease will appear as round, black spots ringed by yellow tissue. Water roses only from below. Try not to get the foliage wet when you water. Water in the early morning hours so the rose plant has time to dry during the day. Rake up any fallen leaves from the soil surrounding the plant. Black spot as well as other fungus diseases are transmitted by water splashing back up onto the leaves and stems. Remove any diseased leaves. Pick off and destroy any foliage that has evidence of black spot. Dispose of infected foliage in a sealed plastic bag. Dust roses infected with black spot with sulfur powder. Sulfur will not kill the fungus spores, but it will prevent a new generation from germinati
