First report of Cucumber vein yellowing virus in Lebanon
In Lebanon, the presence of Cucumber vein yellowing virus (Ipomovirus, CVYV – EPPO A2 List) was detected for the first time during a national survey for virus diseases of cucurbits which was carried out from 2008 to 2009. CVYV was found in a limited number of symptomatic cucumber crops (Cucumis sativus) grown under protected conditions. In early spring 2013, 16 leaf samples showing vein-yellowing symptoms were collected from Northern coastal areas (Jbeil, Amshit, Tabarja), and 11 samples showing yellowing symptoms only on older leaves were collected from the Southern coast (Jiyeh). CVYV was detected in all samples from the Northern coast and in 4 samples from the Southern coast. Comparison of sequences revealed a high variation between isolates from the Northern and Southern coasts. Surveyed cucumber plants were also tested for two criniviruses, Cucurbit chlorotic yellows virus and Cucurbit yellow stunting disorder virus, and mixed infections (double or triple) were found in some plants. It is noted that during the last 5 years, only a limited number of cucumber plants have shown CVYV symptoms, suggesting that this virus disease is sporadic in Lebanon.
The situation of Cucumber vein yellowing virus in Lebanon can be described as follows: Present, found since 2008 in a limited number of greenhouse cucumber crops.
Sources
Abrahamian PE, Sobh H, Seblani R, Samsatly J, Jawhari M, Abou-Jawdah (2013) First report of Cucumber vein yellowing virus on cucumber in Lebanon. Plant Disease 97(11), 1516-1517.