Dealing With Blackspot Rose Disease
Blackspot is a prevalent rose disease that is caused by the fungus Diplocarpon rosae. Should your rose bushes develop the telltale signs of blackspot, remedial measures must be taken immediately. Otherwise, the bush will begin producing fewer blooms and the rose's ability to survive the winter months will be jeopardized.
Blackspot is easy to recognize in its latter stages, but might not be noticeable in the beginning. In fact, by the time blackspot starts showing signs, as few as 3 to as many as 10 days have already passed since the fungus first germinated.
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