Citrus Tristeza Virus and Its Aphid Vector Toxoptera citmicida: Threats to Citrus Production in the Caribbean and Central and North America. Maria A. Rocha-Pena, Institute Nacional de lnvestigaciones Forestales y Agropecuarias. General Teran, Nuevo Leon, Mexico. Richard F. Lee University of Florida, Citrus Research and Education Center, Lake Alfred; Rarnon Lastra, Centro Agronomico Tropical de Investigacion y Ensenanza Turrialba, Costa Rica; C. L. Niblett, University of Florida, Plant Pathology Department, Gainesville; Francisco M. Ochoa-Corona Facultad de Agronomia, Universidad Central de Venezuela. Maracay, Aragua, Venezuela; Stephen M. Garnsey and Raymond K. Yokomi, USDA Horticultural Research Laboratory, Orlando, Florida. Plant Dis. 79:437-445. Copyright 1995 The American Phytopathological Society 446. DOI: 10.1094/PD-79-0437.