Peony Disorder: Phytophthora and Botrytis Blights
Author(s) M. F. Heimann, G. L. Worf.
These diseases may strike peonies anywhere in Wisconsin. Although distinct, Phytophthora and Botrytis are discussed together because their symptoms and control measures are similar. Find out how to identify, prevent, and control these peony disorders in your home garden (2 pages; Revised in 1995).