Norman E. Rees, USDA Agricultural Research Service - Retired, Bugwood.org

Peggy Greb, USDA Agricultural Research Service, Bugwood.org

Mary Ellen (Mel) Harte, Bugwood.org

Mary Ellen (Mel) Harte, Bugwood.org

Steve Dewey, Utah State University, Bugwood.org

Ohio State Weed Lab , The Ohio State University, Bugwood.org

Ohio State Weed Lab , The Ohio State University, Bugwood.org

Mary Ellen (Mel) Harte, Bugwood.org

Steve Dewey, Utah State University, Bugwood.org

UAF Cooperative Extension , University of Alaska - Fairbanks, Bugwood.org

Steve Dewey, Utah State University, Bugwood.org

Rob Routledge, Sault College, Bugwood.org

Ken Chamberlain, The Ohio State University, Bugwood.org

Jan Samanek, Phytosanitary Administration, Bugwood.org