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Posted: February 19, 2018
The presence of Grapevine Pinot Gris Virus (GPGV) has been confirmed. In response to these detections the Consultative Committee on Emergency Plant Pests, in consultation with industry, now consider the virus to be widespread and non-eradicable.
GPGV was first described in 2012, when advances in diagnostic technology allowed the virus to be identified. It is now known to occur in many wine producing countries including China, Croatia, Canada, Georgia, Germany, Italy, France, Korea, Slovenia, Czech Republic, Slovak Republic, Greece, USA and Turkey. The virus affects both wine and table grape varieties including Pinot Gris, Pinot Noir, Traminer, Chardonnay, Merlot, Cabernet Franc, Cabernet Sauvignon, Shiraz and Carmenere.
The virus can spread through the movement and exchange of infected propagation material, and possibly by mites vectors known as Colomerus vitis.
Grapevines infected with GPGV can either show symptoms, or are symptomless. The symptoms associated with infection include delayed budburst, leaf distortion and mottling (see image), 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.
The impact of GPGV on vine health is further complicated if the vine is also affected by other viruses.
Eradication of GPGV from Australia is not considered technically feasible and therefore regulation of the virus at the border will no longer occur. Therefore, it is important that you promptly call the Exotic Plant Pest Hotline (1800 084 881) if you observe symptoms in grapevines similar to that described above and in the GPGV fact sheet.
If you have questions about Grapevine Pinot Gris Virus, please contact Australian Vignerons on 08 8133 4401.