Is it a disease, an insect, or an environmental problem? If you have ever been asked what’s wrong with a tree or shrub, you know that a correct diagnosis is the first, and most important step toward successfully managing plant problems. The ability to accurately diagnose common, and not so common, tree and shrub problems, as well as provide effective management solutions is vital in today’s green industry.
Cheryl A. Smith, Ph.D.
Plant Health Specialist
University of New Hampshire Cooperative Extension
Durham, NH