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

Bruce Ackley, The Ohio State University, Bugwood.org

Bruce Ackley, The Ohio State University, Bugwood.org

L.L. Berry, Bugwood.org

Joseph M. DiTomaso, University of California - Davis, Bugwood.org

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

Bruce Ackley, The Ohio State University, Bugwood.org

Joseph M. DiTomaso, University of California - Davis, Bugwood.org

Bruce Ackley, The Ohio State University, Bugwood.org

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

D. Walters and C. Southwick, USDA, Bugwood.org

D. Walters and C. Southwick, USDA, Bugwood.org