Alton N. Sparks, Jr., University of Georgia, Bugwood.org

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

USDA Forest Service , Bugwood.org

Robert L. Anderson, USDA Forest Service, Bugwood.org

Andrew J. Boone, South Carolina Forestry Commission, Bugwood.org

Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org