Phytophthora Diseases in Ornamentals

Phytophthora diseases are among the most serious problems of ornamental plants in nurseries, greenhouses and in the landscape. These 'water mold' pathogens affect hundreds of types of plants, including annuals, perennials, trees and shrubs. This bulletin describes the disease cycle, symptoms and management of Phytophthora diseases of ornamentals. Tables provide information on fungicide options, prevention techniques and susceptible plants with resistant plant alternatives.