Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000860
11/12/99
LILIUM DISEASE PROBLEMS - Outdoors
Bacterial soft rot causes soft wet decay of the bulbs.
Discard rotted bulbs and plant in well-drained soil.
Avoid wounding plants during the growing season. Dig bulbs
carefully to avoid injury.
Gray mold causes circular to oval, yellowish to reddish
brown spots. Some spots have light gray centers and dark
purple shading to green outer regions. In wet weather the
spots run together blighting the whole leaf. Stems break
over at the point of infection. Infected flowers and
flower buds are abnormal and brown. The growing point may
be killed. Gather and destroy infected leaves. The
disease is caused by Botrytis cinerea.
Foot rot attacks the stems just below soil level. The
infected parts shrivel and the plants wither, topple over
and die. Dig up and destroy infected plants. Plant the
bulbs in well-drained soil and avoid wounding. This
disease is caused by Phytophthora cactorum.
Frost injury causes a condition called puffy leaf. The
plants will be stunted. Mulch to protect young shoots
from frost.
Related information.
Pesticide Recommendations
Botrytis Blight
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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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