First Report of Squash leaf curl virus in Cucurbits in Lebanon

摘要

During the second squash cropping season, which coincides with high whitefly populations, a high incidence of plants with severe leaf curl symptoms was observed. Many farmers reported yield losses ranging from 70 to 80%. Surveys were conducted over five cropping seasons (2008 to 2010) and covered the coastal areas of Lebanon. A total of 675 samples were collected, including cucumber (Cucumis sativus), squash (Cucurbita sp.), melon (Cucumis melo), and watermelon (Citrullus lanatus). All squash samples had leaf curl symptoms, whereas 75 to 85% of cucumber, melon, and watermelon samples showed yellowing symptoms. The remaining 15 to 25% were asymptomatic. Total nucleic acids were extracted according to a small-scale CTAB protocol (4).