August 1, 1992 - On this Midday program, Dr. David French, plant pathologist at the University of Minnesota, talks about trees. French is an expert on Dutch Elm disease and Oak Wilt disease and founder of Minnesota Shade Tree Advisory Committee.
May 6, 1989 - Don Willeke, chairman of the Minnesota State Shade Tree Advisory Committee; and Dr. David French, professor of plant pathology and forestry resources at the University of Minnesota, discuss tree diseases, treatments, and tree planting at the start of Arbor Month. Willeke and French also answer listener questions.