1. Department of Pathobiology, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA
2. Florida Fish and Wildlife Conservation Commission, 4005 South Main Street, Gainesville, Florida 32601, USA
3. Current address: Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706, USA
4. Division of Plant Industry, Bureau of Entomology, Plant Pathology, and Nematology, Gainesville, Florida 32614, USA