Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001249
11/12/99
RHUS DISEASE PROBLEMS
Several fungi cause cankers leading to dieback. Fertilize
to keep plants healthy and prune out infected parts.
Fusarium wilt infects roots, causing the leaves to droop
and wilt. A light infection causes only gradual
dwarfing or yellowing and premature red leaf coloration.
Leaf spot caused by Pezizella oenotherae causes gray
spots with purplish margins that merge, giving the leaves
a scorched appearance.
Various genera of powdery mildew forms a white coating on
the leaves.
Verticillium wilt causes wilting of individual stems,
followed by death of the foliage. Eventually the entire
plant dies. Prune out infected branches. Do not replant
in the same spot with sumac or other susceptible plants.
Related information.
Pesticide Recommendations
Cankers
Fungal and Bacterial Leaf Diseases
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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