Diplocarpon rosae is a fungus that causes the rose disease Black Spot. The black spots are circular with a perforated edge, and reach a diameter of 14mm, but vary in size. Badly affected plants, however, will not show the circular patterning, as they combine to cause a large black mass.
Wherever roses grow.
Whenever roses are in leaf.
Lower leaves are infected first. Diseased leaves fall to the ground carrying the disease which will infect the plant again the following year.
Common and widespread in Britain.
Common in Leicestershire and Rutland.
Leicestershire & Rutland Map
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