“…Sinaloa tomato leaf curl virus -STLCV) (Idris & Brown, 1998), 11 to 12 days for ToLCBV-C (Muniyappa et al 2000), 11 to 20 days for TYLCV isolate from Jordan (Cohen & Nitzany, 1966;Mansour & Al-Musa, 1992), and 26 days for SLCV (Cohen et al, 1983). These differences in virus AAP, IAP, LP, and period of retention within the insect are expected because, besides the variations in the conditions of the various experiments, especially with respect to insect numbers and the manner by which those insects were handled, other variables, such as begomovirus species, geographic origin of the virus isolate and of the B. tabaci biotype B population might affect these parameters, as reported in studies involving other begomoviruses (Picó et al, 1996;Muniyappa et al, 2000).…”