Grapevine Pinot Gris Virus (GPVG) is a new to science pathogen, first described in Italy in 2012 and subsequently reported in many other countries across Europe, Asia and North America. Diagnostic capacity became available in Australian laboratories in 2015. In late 2016 and in subsequent surveillance undertaken in 2017, the virus was detected in Australia in multiple wine grape varieties and one table grape variety across three states.
Fast facts about GPGV
- Now classified as established and present in NSW, Victoria and South Australia.
- Has been detected in more than 30 grape cultivars worldwide.
- Infected grapevines may show symptoms or be symptomless.
- The virus can spread through infected propagation material and possibly by bud mites. It is thought to have alternate hosts such as Fat hen (Chenopodium album) which is widely naturalised throughout large areas of Australia.
- Symptoms are most evident in spring and include leaf mottling and deformation and can be confused with cold or mite damage.
- Little is known on the effect of the virus on grapevine growth, yield and fruit quality.
A Wine Australia-funded project titled ‘A comprehensive review of Grapevine Pinot Gris Virus (GPGV), including recommendations for future research, development and extension work in Australia’ began in April 2018 and is expected to provide significant guidance for the industry. Findings will be communicated at the conclusion of the project, post 31 October 2018.
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Symptoms of Grapevine Pinot Gris virus. Image courtesy Dr. Pasquale Saldarelli, Istituto per la Protezione Sostenibile delle Piante, Bari, Italy.