Welcome to our page.
"Illustrations of Tree Diseases" was developed for an upper division
undergraduate course. The emphasis is on diseases and disorders found
in the midwestern states.
The best way to learn about tree problems is to get out there on the
ground and see for yourself.
These
pictures are no fair substitute for doing. They are intended to
supplement that activity, for times of the year when symptoms are not
available, or to illustrate problems not immediately accessable.
The images included in these collections were scanned from slides
used by Professor R. W. Stack in a course, Tree Diseases, which he
taught from 1977 through 2001 at North Dakota State University. All
of the images are original photographs, mostly taken by Prof. Stack.
A few pictures are borrowed and are included here by permission and
with acknowledgement. The images are organized according to the
course syllabus.
This collection is intended to serve as illustrative material to
show what certain diseases look like.
The pictures are not intended as a basis for
diagnosis.
Diagnosis of the cause of a particular problem requires more than
comparison to a few pictures.
University Extension services in most states provide plant diagnostic
services through county agricultural extension agents. In North
Dakota contact the NDSU Plant Diagnostic Lab (701)231-7854.
These images are provided for the personal use of students, scholars,
and the public.
Any commercial use or publication of them is strictly prohibited.
The images were scanned and processed by the author at the Multimedia
Resource Center, North Dakota State University, Fargo, ND 58105.
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