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Detection of l65rXII-A phytoplasma in insects collected in vineyards of South Italy. Integrated Protection in Viticulture.

D'URSO, Vera;RAPISARDA, Carmelo
2008-01-01
2008
Bois noir (BN) disease is a grapevine yellow associated to stolbur phytoplasma, l6SrXII-A phylogenetic subgroup, which is responsible of severe crop losses in all grape growing areas in Italy. This phytoplasma is transmitted by the planthopper Hyalesthes obsoletus Signoret (Hemiptera Cixiidae), but the role of other Auchenorrhyncha species has been recently suspected. Studies on BN vectors have been carried out in Italy and results of surveys,realised during 2004-2007 in severalv vineyards located in Southern Italian regions (Calabria and Sicily) are reported in this work. Auchenorrhyncha specimens have been collected by means of entomologicaln net, sampling on grapevine canopy and also on weeds growing both along the grape rows and on the border of vineyards. Many species of Auchenorrhyncha were detected and data on their distribution and abundance are given in this paper. In particular, Toya propinqua Fieber (Delphacidae) and Exitianus capicola Stàl. (Cicadellidae) showed to be the most frequent species in the investigated vineyards. Moreover, some of their specimens resulted at molecular analysis to be positive to the l6SrXII-A phytoplasma.
Bois noir; phytoplasma; vineyards; Auchenorrhyncha; vectors
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/10873
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