Dr. Bert Cregg is an Associate Professor and Extension Specialist for landscape, nursery, and Christmas tree production at Michigan State University. His expertise includes stress physiology, plant nutrition, and plant response to environmental stresses. He develops extension and education programs for key commodity groups including the Michigan Nursery and Landscape Association, the Michigan Christmas Tree Association, the Arboriculture Society of Michigan, the Michigan Green Industry Association, and the Michigan Seedling Growers Association. Dr. Cregg writes frequently on landscape and nursery topics regular and is regular contributor the MSU Extension News, the Michigan Landscape magazine, and the Great Lake Christmas tree journal. Prior to joining the MSU faculty in 1999, Dr. Cregg was a Tree Physiology Project Leader for International Paper and a Research Plant Physiologist of the USDA Forest Service. He earned his Ph.D. in Forest Resources at the University of Georgia and holds a Master of Science in Forestry from Oklahoma State University and Bachelor’s of Science in forest Management from Washington State University.