Lily Of The Valley (Convallaria) Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Lily Of The Valley (Convallaria) diseases.
Lily Of The Valley (Convallaria) Diseases - Articles
Lily Of The Valley (Convallaria) Diseases
DiseaseSymptomsPathogen/CauseMnaagement
Southern blightTan to mustard-colored ball-like structures (sclerotia) on the stem base near the soil. Plants wilt and die.Sclerotium rolfsiiRemove and destroy infected plants. Apply a fungicide to protect plants.
Leaf spots and AnthracnoseSmall water soaked spots enlarge and turn tan to reddish brown as the leaf yellowsAscochyta, 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 spotSmall 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 microstictumDo not use a sprinkler to water the plants. Wet the soil rather than the plants. Apply a fungicide to protect plants.
RustSmall yellow leaf spots are on the upper side of the leaf while orange-brown spore masses are on the underside of the leaf.Puccinia sessilisApply a fungicide to protect plants.
Foliar nematodeAreas 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.

Prepared by Gary W. Moorman, Professor of Plant Pathology