Paul Wray, Iowa State University, Bugwood.org

Paul Wray, Iowa State University, Bugwood.org

Paul Wray, Iowa State University, Bugwood.org

Bill Cook, Michigan State University, Bugwood.org

Bill Cook, Michigan State University, Bugwood.org

Bill Cook, Michigan State University, Bugwood.org

Bill Cook, Michigan State University, Bugwood.org

Gil Wojciech, Polish Forest Research Institute, Bugwood.org

Dow Gardens , Bugwood.org

Norbert Frank, University of West Hungary, Bugwood.org

Robert Vidéki, Doronicum Kft., Bugwood.org

Robert Vidéki, Doronicum Kft., Bugwood.org