Dr. Bert Cregg

Michigan State University

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 Christmas tree production.  He holds a doctorate in Forest Resources from the University of Georgia and was a forestry researcher for the USDA Forest Service and International Paper before joining MSU.  He has published over 100 articles in scientific journals, magazines, and extension publications.


Track: Grower
Jan 23 2017 - 10:30am

Fertilization and nutrient management are critical components of managing container nursery crops.  Failure to provide adequate levels of essential plant nutrients can result in reduced growth or poor crop quality, while excessive fertilization...

Track: Arboriculture
Jan 23 2017 - 3:00pm

The use of trunk injections by tree service companies has increased rapidly in recent years.  A variety of compounds including nutrients, insecticides, and fungicides can be effectively applied to trees via trunk injection.  Achieving rapid...