Clemson University - USDA Cooperative Extension Slide Series , Bugwood.org

Clemson University - USDA Cooperative Extension Slide Series , Bugwood.org

Charles Averre, North Carolina State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Ethel Dutky, University of Maryland, Bugwood.org