Emergent plant viruses that were recognized in 1978 as members of a unique family
	Predominant in tropical & subtropical locales, fringe-temperate areas, and greenhouse/glasshouse grown crops in temperate zones
	Dicotyledonous: typically annual crops and weeds; also perennial weeds; found primarily in the tropics and subtropics
	Bright yellow mosaic, yellow mosaic, yellow mottle, leaf curling, stunting, reduced yields
	Bemisa tabaci (Gennadius); Common names: cotton, sweetpotato, or tobacco whitefly
	Paired or twinned icosahedral particles 20 X 30 nm in size
	Single-stranded, circular DNA genome of 2.7 - 2.8 (monopartite) or 5.2 - 5.4 (bipartite) bases
	Whitefly vector
	Sap inoculation with difficulty, or not at all for others, biolistic inoculation using infectious DNA extracts, clones, and virions; Agro-inoculation of cloned viral genomes
	Persistent, circulative, non-propagative in vector*; not transovarially transmitted* (*except TYLCV)
	No evidence