First report of Grapevine red blotch virus in Australia in grapevine collections
In September 2022, the presence of grapevine red blotch virus (Grablovirus, GRVB – EPPO A1 List) was reported for the first time from Australia. During routine testing for viruses, GRBV was detected in grapevine collection material in South Australia, Western Australia, and Victoria. Although these grapevine collections are used for propagation, the virus has not been discovered in commercial nurseries or vineyards. For the moment, no symptoms or damage have been reported and it is noted that the insect vector (Spissistilus festinus, Hemiptera: Membracidae) which is known to efficiently transmit the disease in California (US) does not occur in Australia. It is considered that the virus has been present in Australia for a long time (at least 30 years) and that these detections are not new incursions but long-standing infections. No phytosanitary regulations will be implemented but the grapevine industry has been informed and growers have been advised to follow good hygiene practices.
The situation of grapevine red blotch virus in Australia can be described as follows: Present: not widely distributed and not under official control.
Sources
Agriculture Victoria (2022-09-25) Grapevine red blotch detections. https://agriculture.vic.gov.au/biosecurity/moving-plants-and-plant-products/biosecurity-updates/grapevine-red-blotch-virus-detections
Vine Health Australia. Industry Notice (2022-09-16). Grapevine red blotch virus detections: your questions answered. https://vinehealth.com.au/wp-content/uploads/VHA-Industry-Notice-GRBV-QA-V1.pdf