Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Sanitation is the first step in control. Rake up and destroy all diseased and fallen leaves in the fall. If and when the blackspot symptoms appear begin spraying with a fungicide such as chlorothalonil (Daconil 2787 or Ortho Multi-purpose fungicide) or Funginex. Many of the rose dusts will also give good general disease and insect control.
