Diplocarpon rosae in different languages.
Black spot disease in roses
FACTSHEETS FOR FARMERS
Black Spot disease in Roses
Recognize the problem
The disease is caused by a fungus and can initially be recognized by small dark
brown to black spots on leaves and stems (a few mm to 1.5.cm). The more or
less round spots have wavy margins. In an advanced stage the spots enlarge
to form dark patches surrounded by yellow rings (see picture). Symptoms are
Controlling Diseases and Aphids on Your Roses
RosesC O N T R O L L I N G D I S E A S E S A N D A P H I D S O N Y O U R
C O N T R O L L I N G D I S E A S E S A N D A P H I D S O N Y O U R
M. Hoffer, J. Pscheidt, and J. DeAngelis
Roses are the most popular perennial flowering plant in the United States, and they grow well inthe Pacific Northwest (PNW). Our...