Articles

Lily Of The Valley (Convallaria) Diseases

Name: Lily Of The Valley (Convallaria) Diseases
SKU: ART-4108

Informational table showing disease name, symptoms, pathogen/cause, and management of Lily Of The Valley (Convallaria) diseases.

Updated:

November 21, 2023

Lily of the Valley

Disease	Symptoms	Pathogen/Cause	Management
Southern blight	Tan to mustard-colored ball-like structures (sclerotia) on the stem base near the soil. Plants wilt and die.	Sclerotium rolfsii	Remove and destroy infected plants. Apply a fungicide to protect plants.
Leaf spots and Anthracnose	Small water-soaked spots enlarge and turn tan to reddish brown as the leaf yellows	Ascochyta, Cercospora, Mycosphaerella, or Phyllosticta Colletotrichum or Gloeosporium species.	Do not use a sprinkler to water the plants. Wet the soil rather than the plants. Apply a fungicide to protect plants.
Aureobasidium leaf spot	Small water-soaked spots develop which later have brown streaks with yellow halos--these spots often form from the leaf tip downward. Infected leaves die prematurely.	Aureobasidium microstictum	Do not use a sprinkler to water the plants. Wet the soil rather than the plants. Apply a fungicide to protect plants.
Rust	Small yellow leaf spots are on the upper side of the leaf while orange-brown spore masses are on the underside of the leaf.	Puccinia sessilis	Apply a fungicide to protect plants.
Foliar nematode	Areas between the veins turn yellow and then brown.	Aphelenchoides spp.	Water in a manner that keeps moisture off the leaves. Remove and destroy infected plants.