Kari Korhonen

Kari Korhonen (born July 24, 1943 in Sotkamo) is a Finnish mycologist and forest pathologist, known for his studies of fungi causing root rot.

Korhonen graduated as a biologist from the University of Helsinki in 1968. He made his career as a researcher at the Finnish Forest Research Institute in Helsinki, beginning in 1973. From the start his research concentrated on the forest pathogen fungi then known as Heterobasidion annosum and Armillaria mellea. During his career over 40 years he collected more than 4000 isolates of these species in Scandinavia, Germany, Italy, Greece, USA, Canada, Estonia, Belarus, Siberia and China.

Initially, following Veikko Hintikka's discovery of a technique to distinguish between Armillaria species by growing them together as single spore isolates on petri dishes and observing changes in the morphology of the cultures,