Sweetpotato whitefly and whitefly-transmitted tomato yellow leaf curl virus (TYLCV) are major threats to tomatoand pepper production in all around world. TYLCV was reported in the Mediterranean countries and has spread to othercountries via different routes. Recent results emphasize that resistant tomato genotypes against TYLCV infection can serveas TYLCV and whitefly reservoirs and potentially influence TYLCV epidemics. Recent studies showed that geminivirusesincluding TYLCV can be seed transmissible viruses. Taken together, to prevent the outbreak or rapid spread of new geminivirus,both insect vector mediated transmission and seed transmission should be concerned.