Viruses of Orchids and Their Control. F. William Zettler, University of Florida, Gainesville. Nan Jing Ko National Chung-Hsing University, Taichung, Taiwan; 0111 ; Gail C. Wisler and Mark 8. Elliott Unlverslty of Florida, Gainesville; Sek-Man Wong National University of Singapore, Republic of Singapore. Plant Dis. 74:621-626. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0621.