Situation of Grapevine red blotch virus in Italy
A study was conducted in Northern Italy to assess the presence of Grapevine red blotch virus (Grablovirus, GRBV – EPPO Alert List) in grapevine. The study was carried out using 596 grapevine samples, collected in 2004–2018 for other purposes and stored in the Research Centre for Viticulture and Oenology (CREA-VE) collection at -80°C as total RNA or DNA extracts. Samples included rootstock and table grape accessions from ampelographic collections, and commercial varieties with red blotch-like symptoms. GRBV was not detected in samples of commercial vines. Only 2 samples (one of ‘Queen’ and one of ‘Incrocio Dalmasso VIII-5’ accessions), collected from the CREA-Viticulture and Oenology repository of table grape varieties tested positive for GRBV.
The authors conclude that GRBV is absent from commercial vineyards of Northern Italy.
Sources
Bertazzon N, Migliaro D, Rossa A, Filippin L, Casarin S, Giust M, Brancadoro L, Crespan M, Angelini E (2021) Grapevine red blotch virus is sporadically present in a germplasm collection in Northern Italy. Journal of Plant Diseases and Protection. https://doi.org/10.1007/s41348-021-00468-5