TRANSMISSION OF GRAPEVINE VIRUS A AND GRAPEVINE LEAFROLL-ASSOCIATED VIRUS 3 BY HELIOCOCCUS BOHEMICUS

A. Zorloni, S. Prati, P.A. Bianco, G. Belli

Abstract


Heliococcus bohemicus Sulc is very frequently found in vineyards in Northern Italy, where grapevine leafroll is widespread. Grapevine leafroll-associated virus 1 (GLRaV-1) and Grapevine leafroll-associated virus 3 (GLRaV-3) are also quite frequently observed, often in association with Grapevine virus A (GVA). The capacity of the mealybug to transmit these viruses to vine was therefore evaluated. Virus-free insects were fed on infected vines and then transferred to healthy test-plants. GLRaV-3 was transmitted to two out of 77 inoculated test-plants and GVA to one out of 38; GLRaV-1 was not transmitted. This is the first report of GVA transmission by H. bohemicus and the first report of the capacity of this mealybug to transmit GLRaV-3 to grapevine in Italy.

Keywords


ampelovirus; mealybug; virus-vector; vitivirus; Heliococcus bohemicus

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DOI: http://dx.doi.org/10.4454/jpp.v88i3.880

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EDIZIONI ETS, Pisa, Italy