Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000717
11/12/99
HEMEROCALLIS DISEASE PROBLEMS
Leaf spot causes black spots on the leaves. Gather and
destroy infected leaves. No chemical control is listed
for this disease caused by Cercospora hemerocallis.
Russet spot causes greenish yellow leaf spots which
gradually enlarge and turn orange-brown. Plants growing
in partial shade seem less affected. The disease is most
common on H. fulva rosea and its varieties. The cause is
not known.
Related information.
Pesticide Recommendations
Fungal and Bacterial Leaf Diseases
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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