Catalpa Diseases
Gary W. Moorman, Professor of Plant Pathology
|
Disease |
Symptoms |
Pathogen/Cause |
Management |
|---|---|---|---|
|
Leaf spot |
Brown to black spots form on leaves. These spots may drop out or leaves may fall prematurely. |
Many different fungi can cause spotting. |
No control is recommended since little damage occurs. |
|
Powdery mildew |
White fungal growth develops on the upper surface of the lower leaves. |
Microsphaera or Phyllactinia |
No control is recommended since little damage occurs. |
|
Verticillium wilt |
Purplish to bluish-brown streaks are found under the bark in the sapwood of wilted branches. Wilting often develops on branches on one side of the tree. |
Verticillium |
Trees may die within a year or may survive to wilt to some extent every year. There are no effective controls. Do not replace a tree killed by Verticillium wilt with another catalpa or other species susceptible to the disease. |
Verticillium wilt
Discoloration by Verticillium
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Notice: The user of this information assumes all risks for personal injury or property damage.
Warning! Pesticides are poisonous. Read and follow all directions and safety precautions on labels. Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. Dispose of empty containers right away, in a safe manner and place. Do not contaminate forage, streams or ponds.
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