Troubling shooting: Is it a pest?

February 27, 2020

Browning or yellowing of foliage, needle drop, and tree death are symptoms that can be caused by insect pests or diseases. But they can also be caused by environmental issues. Oftentimes damage caused by environmental factors such as temperature extremes or herbicide injury may not be apparent until long after the damaging event. Dr. Cregg will discuss steps in trouble-shooting tree problems and determining whether a problem is related to biotic or environmental factors. By Bert Cregg, Michigan State University.