A surveillance strategy for Grapevine Pinot Gris Virus (GPGV) is being rolled out in South Australia this spring.

Vinehealth Australia, Biosecurity SA, expert virologists Dr Nuredin Habili (Waite Diagnostics, The University of Adelaide) and Dr Fiona Constable (Crop Health Services, Agriculture Victoria) and the vine improvement and nursery sector have worked together to develop a considered approach to verifying the presence of GPGV in SA, in response to detection of GPGV in Australia late last year. Surveillance strategy
The GPGV surveillance approach will focus on targeted health status checks of high priority material, in particular:

  1. Propagation stocks (both germplasm and regional source blocks) as a means of predicting potential spread through commercial vineyards;
  2. Commercial vineyards that have reported to the Exotic Plant Pest Hotline, vines with symptoms similar to those associated with GPGV; and
  3. Vineyards identified with potential links to existing infected vines, as determined through trace back and trace forward audits.

“We feel this method of targeted sampling will provide us with the best opportunity to determine the potential distribution of GPGV across the state,” said Vinehealth Australia CEO Inca Pearce. “This information will then facilitate the most appropriate response and management decisions to be made.”Vineyard monitoring
Vinehealth Australia is encouraging all growers to monitor their vines for symptoms of GPGV when shoots are between 5 and 30cm long. Symptoms associated with infection at this time include delayed budburst, leaf distortion and mottling and shortened internodes (refer to the AWRI Fact Sheet). These symptoms are most pronounced in spring and may be confused with early season bud mite damage, cold injury or herbicide damage. To read the most recent Australian Vignerons communications about GPGV, click here

Growers should monitor all varieties for GPGV symptoms, and in particular those varieties listed in the table below, which have reportedly tested positive overseas:

Cabernet FrancCabernet SauvignonCarignanCarmenereChardonnay
GrenacheMerlotMuller ThurgauMuscat Hamburg (Black Muscat)Pinot Blanc
Pinot GrisPinot NoirRed GlobeRieslingSauvignon Blanc

Testing for GPGV
There are two laboratories for testing:

Note, if you are sending material to any laboratory, it’s important you talk to that lab prior to collecting samples as labs have slightly different field sampling protocols. And if sending samples interstate, please check documentation requirements with the lab prior to posting.

If you notice anything unusual, please report it promptly to the Exotic Plant Pest Hotline on 1800 084 881 For further information about GPGV or this surveillance strategy for South Australia, please contact Vinehealth Australia on (08) 273 0550 or Biosecurity SA on (08) 8207 7900.

For information and advice about vine health issues and biosecurity, contact Vinehealth Australia on (08) 8273 0550, email admin@vinehealth.com.au or visit www.vinehealth.com.au

Leaves from a Pinot Grigio grapevine show chlorotic mottling and deformation, symptoms of GPGV. Photo by Dr. Pasquale Saldarelli, University of Bari.