Welcome to the tree doctor home web page of Landscape and Tree Problems. The information contained herein represents some of the areas with which I have developed an interest, whether of an Extension (university outreach) or a research nature. As a Plant Pathologist, my obvious area of expertise is plant disease. Over the years, my direction has changed somewhat from general disease/diagnostic efforts to the more economically
Trees represent some of the most valuable plants in landscapes and nurseries. Trees are often valued in the $10,000's whether property value or removal costs are considered. In the landscape, trees are often quite large and many have been growing for well over 100 years. Some of them were growing at the time of the American Civil War when Lincoln was President and/or during other significant times in American history. While most people value their trees and would do anything to save them, we, as humans, often unknowingly and unintentionally, do things which threaten their very existence. By providing this information on this site, I hope that trees will receive the respect and consideration they truly deserve. If the information provided in this web site saves even one tree from destruction, I will feel that I have succeeded in my objective.
David L. Roberts, Ph.D., Senior Academic Specialist
Dr. David L. Roberts
(Discoverer of the Emerald Ash borer)
College of Agriculture and Natural Resources
173 Giltner Hall, East Lansing, MI 48824-1101
Administrative Assistant II/S Emeritus
Michigan State University
I would like to thank Sandi Rosa who originally designed and
administered this web site. Without her invaluable assistance, my efforts
at bringing you up-to date information about the Emerald Ash Borer, Oak
Wilt and many other issues would not have been feasible.
Much appreciation is expressed to the MSU College of Engineering
and to the MSU Division of Engineering Computing Services.