Co-Authors:
Cohen, S., Dept. of Virology, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Kern, J., Vegetable Dept., Ministry of Agriculture, Tel Aviv, Israel
Harpaz, I., Deceased. The Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, 76100, Israel
Ben-Joseph, R., Dept. of Virology, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Abstract:
The spread of tomato yellow leaf curl virus (TYLCV) is significantly correlated with the population size of its vector, Bemisia tabaci Genn. The perennial weed Cynanchum acutum L. and the annual weed Malva parviflora L. were found to be natural hosts of TYLCV in the Jordan Valley. C. acutum is not a preferred host for B. tabaci, but the whitefly feeds on it sufficiently long to acquire the virus. Whiteflies marked with fluorescent dust while feeding naturally on C. acutum along the banks of the Jordan River, were subsequently trapped within the main tomato-production area 7 km away. An increase in the B. tabaci population and in TYLCV infectivity was found in plots surrounded by windbreaks. The epidemiological cycle of TYLCV is described and cultural control measures are suggested. © 1988 Springer Science + Business Media B.V.
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