Experimental transmission by <i>Scaphoideus titanus</i> Ball of two Flavescence doree-type phytoplasmas

Authors

  • N. Mori
  • A. Bressan
  • M. Martin
  • M. Guadagnini
  • V. Girolami
  • A. Bertaccini

DOI:

https://doi.org/10.5073/vitis.2002.41.99-102

Keywords:

phytoplasma, transmission, PCR, RFLP, detection

Abstract

During the last 5 years Flavescence doree (FD) has been expanding from the first loci of outbreak in the Veneto region, to the major viticultural areas of northern Italy, showing increased infection rates in 1999. The FD vector is Scaphoideus titanus Ball. Recently it has been demonstrated that in Veneto FD is associated with two molecularly distinguishable types of phytoplasmas, both belonging to the 16SrV group (Elm yellows and related strains). In 1997 the two phytoplasma types appeared to be geographically separated in 1997: FD-16SrV-D was found in the provinces of Verona, Vicenza, Venice and Padova, infecting mainly cvs Garganega and Chardonnay while FD-16SrV-C occurred in the Treviso province, infecting cultivars Prosecco, Chardonnay and Perera. During 1998 the two types started to merge in Treviso province, showing that 16SrV-D was transmitted more efficently and over longer distances than the other type. From the transmission trials carried out in 1998 and 1999 in order to gain more information about the epidemiology of the two types of FD agents, S. titanus was found to be able to transmit both 16SrV-C and 16SrV-D phytoplasmas.

 

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Published

2015-04-24

Issue

Vol. 41 No. 2 (2002): Vitis

Section

Article

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