Dr. Bert Cregg is an Associate Professor of Horticulture and Forestry at Michigan State University. Dr. Cregg conducts research and extension programs on physiology and management of trees in nurseries, landscapes and urban and community forests. He holds a doctorate in Forest Resources from the University of Georgia and was a researcher for the USDA Forest Service and forest industry before joining MSU. He has published over 200 articles on trees and tree care in scientific journals, magazines, and extension publications.