Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000209
11/12/99
BERBERIS DISEASE PROBLEMS
Bacterial leaf spots are first small and dark green and
appear water-soaked. Later the spots turn purplish-brown.
Leaf stalks and new growth may also be attacked.
Infection of older twigs results in dieback. Prune out
and destroy infected twigs.
Anthracnose caused by Gloeosporium berberidis is sometimes
listed as a leaf spot. Symptoms are round, brown spots
with reddish margins on the upper leaf surface. Another
fungus, Phyllosticta berberidis, causes purple spots on
the leaves.
Powdery mildews of different genera cause a white coating
on the leaves.
Verticillium wilt causes wilting and eventual death.
Nothing can be done but to keep plants healthy by watering
and fertilizing. Severely infected plants do not recover.
Related information.
Pesticide Recommendations
Powdery Mildew
Verticillium Wilt
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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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