Articles

Verbena Diseases

Name: Verbena Diseases
SKU: ART-3539

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

Updated:

November 21, 2023

Purple Verbena blossom

Disease	Symptoms	Pathogen/Cause	Management
Botrytis Blight	Tan spots develop on leaves. Established plants rot at the crown. Infected tissue is covered with dusty gray fungal growth.	Botrytis cinerea	Maintain low humidity by spacing plants and venting to improve air circulation. Remove dead and dying flowers and leaves. To protect healthy plants, apply a fungicide.
Powdery Mildew	White fungal growth forms on the upper surface of leaves and may form on flower petals.	Golovinomyces cichoracearum (formerly Erysiphe) or Podosphaera xanthii (formerly Sphaerotheca fuliginea). Note: This powdery mildew can attack cucurbits and verbena.	Apply a fungicide to protect plants.
Pythium Root Rot	The roots are dark brown. Plants are wilted and yellowed.	Pythium sp.	Do not over-water plants. Pot in pasteurized media. Keep hose ends off the ground. To protect healthy plants, apply a fungicide.