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 uptake and distribution of trunk-injected chemicals within trees, however, can be difficult. Dr. Bert Cregg (Michigan State University, Departments of Horticulture and Forestry) will discuss how soil, tree, and weather interact to control sap flow and will provide tips to ensure optimal uptake during trunk-injection applications.
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.