Control of Papaya Ringspot Virus by Cross Protection.. Shyi-Dong Yeh, National Chung Hsing University, Taichung, Taiwan, Republic of China. Dennis Gonsalves Cornell University, Geneva Station, NY; Hul-Llang Wang Feng-Shan Tropical Horticultural Experiment Station, Taiwan, Republic of China; Ryojt Namba, University of Hawaii at Manoa, Honolulu; Ren-Jong Chlu, National Chung Hsing University, Taichung, Taiwan, Republic of China. Plant Dis. 72: 375-380. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0375.