Abstract
Three genera of plant viruses, Begomovirus (Geminiviridae), Crinivirus (Closteroviridae) and Ipomovirus (Potyviridae), contain members that infect sweet potato ( Ipomoea batatas) and are transmitted by whiteflies. The begomoviruses, Sweet potato leaf curl virus (SPLCV) and Ipomoea leaf curl virus (ILCV), and the ipomovirus Sweet potato mild mottle virus are transmitted by Bemisia tabaci, the sweet potato whitefly. The crinivirus, Sweet potato chlorotic stunt virus (SPCSV), is transmitted by B. tabaci and Trialeurodes abutilonea, the bandedwinged whitefly. Transmission experiments were done with three of these viruses using laboratory-reared whiteflies and 2-day acquisition and transmission feeding periods. SPLCV and ILCV were transmitted from single and double infections by B. tabaci at rates of 5–10%. Transmission rates for SPLCV by B. tabaci were 15–20%. T. abutilonea transmitted SPCSV at a rate of ca. 3% but did not transmit ILCV or SPLCV.
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