What Are the Treatments for Black Spot on Roses?
Maintaining A Healthy Rose Garden roses image by Olga Charnukha from Fotolia.com Blackspot, or Diplocarpon rosae, is a fungus which commonly invades the leaves of rose bushes. The fungus initially appears as black spots on the leaves and progresses with larger spots ringed in yellow on both sides of the rose leaves. Eventually the leaves die and fall to ground, compromising the entire rose bush. New leaf growth is most vulnerable to blackspot. Treating the fungus is part prevention and part proactive activities such as deadheading spent flowers and cleaning garden debris. Use Fungicide Fungicide can prevent an infection and help to control outbreaks. Fungicides will not cure a blackspot infection once it has begun. Begin using fungicide when new leaves appear and at the beginning of hot, humid or wet weather conditions. It is best to use the product prior to any blackspot outbreak. According to Better Homes and Gardens, standard chemical fungicides such as Bayer Advanced 3 in 1 or orga
