Tomato leaf curl New Delhi virus (ToLCNDV) is a bipartite begomovirus (family Geminiviridae) identified for the firsttime in 1995 in Asia, from where it spread into several countries of the Mediterranean basin. ToLCNDV was found inSpain in 2012, and subsequently in Tunisia and Italy. The first outbreak in Italy occurred at the end of 2015 in Trapaniprovince (Sicily) on zucchini squashes. Then in 2016, ToLCNDV was found in infected zucchini plants in Campania,Lazio and Sardinia regions, and in 2017 in Calabria. This study addressed the dispersion and genetic diversity ofToLCNDV isolates in Italy. A total of 1400 plants were analysed. Phylogenetic analysis showed low variability amongthe Italian isolates, probably as a consequence of the recent introduction and rapid spread of this virus in Italy. Twostatistically significant clusters were reported: one grouping only Italian isolates and the other grouping Italian, Spanish,Tunisian and Moroccan isolates. Furthermore, the highest incidence of ToLCNDV was observed in Sicily, although thedisease also appears to be critical in other Italian regions. In this work, a high efficiency of ToLCNDV mechanicaltransmission into Cucurbita pepo, Cucumis melo inodorus and Cucumis melo cantalupensis has been demonstrated.The rapid spread of ToLCNDV in the Mediterranean basin represents a threat for horticultural production, thus it isvery important to develop suitable crop management practices, applying genetic resistance strategies and more restrictivephytosanitary measures.
|Numero di pagine||8|
|Stato di pubblicazione||Published - 2019|
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