Grapevine Pinot Gris Virus (GPGV) has been detected for the first time in Australia.
This virus is common in many international wine regions in Europe, USA, Canada and China, and can be spread via infected propagation material and possibly by bud and blister mite.
The impact of GPGV on vine health is not well understood and is further complicated by the finding that GPGV is frequently found in mixed infections with other viruses.
Grapevines infected with GPGV can either show symptoms, or are symptomless. The symptoms associated with infection include delayed budburst, leaf distortion and mottling, shortened internodes, increased berry acidity and yield loss (reports of up to 80%). These symptoms are most pronounced in spring and may be confused with early season bud mite damage, cold injury or herbicide damage.
GPGV is still categorised as an exotic plant pest, due to the recent isolated detections of the virus in Australia and, pending further evidence that it is present in other vineyards around Australia.
If you observe symptoms, listed above, in grapevines it is important to contact the Exotic Plant Pest Hotline (1800 084 881).
A factsheet, with additional information about GPGV and what action to take is available on the AWRI website.
Further information will be communicated through the Riverland Wine channels as it comes to hand.
If you have questions about Grapevine Pinot Gris Virus, please contact Australian Vignerons on 8133 4401.