Details on tomato yellow leaf curl bigeminivirus in Egypt
Tomato yellow leaf curl bigeminivirus (TYLCV - EPPO A2 quarantine pest) has invaded tomato plantations in Egypt (lower and middle Egypt) in 1989. Before this date, TYLCV was found very sporadically on some isolated plants in the field. Studies have been carried out in the region of Fayyum. This area has been affected continuously by TYLCV for the last five years, and disease incidence can be quite high (up to approximately 70 %). A high correlation between the incidence of the disease and the presence of viruliferous Bemisia tabaci populations has been found. Genetic studies were carried out and showed that the Egyptian isolate of TYLCV has 98 % homology with the Israeli isolate.
Sources
Aboul-Ata, A.E.; El-Saied, M.A.; Abdel-Aziz, S.; Megahed, H.; Mazyad, H.M. (1997) Epidemiology of tomato yellow leaf curl geminivirus in the Fayium area, Egypt.
Proceedings of the 10th Congress of the Mediterranean Phytopathological Union, 1997-06-01/05, Montpellier (FR), 637-643.