Howard F. Schwartz, Colorado State University, Bugwood.org

Howard F. Schwartz, Colorado State University, Bugwood.org

James H. Miller, USDA Forest Service, Bugwood.org

Howard F. Schwartz, Colorado State University, Bugwood.org

James H. Miller & Ted Bodner, Southern Weed Science Society, Bugwood.org

James H. Miller, USDA Forest Service, Bugwood.org