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Pieris Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Pieris diseases.

Updated:

November 21, 2023

Disease	Symptoms	Pathogen/Cause	Management
Phytophthora root rot	Plants are stunted and then wilt, yellow, and die. Roots with few feeder roots die. Stem wood at the soil level has red-brown discoloration. No obvious fungal fruiting structures are formed.	Phytophthora	Purchase disease-free plants. Especially inspect southern-grown, containerized material before planting. Use clean, disinfested tools. Following a positive diagnosis, remove infected plants. Avoid overhead watering. Apply a fungicide to protect healthy plants.