Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000303
11/12/99
CATALPA DISEASE PROBLEMS
Anthracnose caused by Gloeosporium catalpae will cause
dead areas on the leaves.
Leaf spots caused by several fungi can attack catalpa. A
symptom of all is brown spots on the leaves. Leaf spots
are rarely serious so no chemical control is suggested.
Powdery mildew causes a white powdery coating on the
leaves. When severe, the leaves yellow and fall off.
Catalpa is susceptible to verticillium wilt. Branches die
and eventually the entire tree may die. A symptom of
verticillium wilt is discoloration of the sapwood but it
is hard to find.
During hot, dry seasons the leaves may turn brown due to
scorch. Little can be done other than watering.
Catalpa may be chlorotic due to a high soil pH.
Related information.
Pesticide Recommendations
Anthracnose
Powdery Mildew
Verticillium Wilt
This information is for educational purposes only. References
to commercial products or trade names does not imply
endorsement by MSU Extension or bias against those not
mentioned. This information becomes public property upon
publication and may be printed verbatim with credit to MSU
Extension. Reprinting cannot be used to endorse or advertise
a commercial product or company.
This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
For more information about this data base or its contents please contact
heatley@msue.msu.edu . Please read our
disclaimer for important
information about using our site.