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Managing grapevine trunk diseases during pruning
The grapevine trunk diseases Eutypa and Botryosphaeria dieback reduce vineyard productivity and longevity. Vines are infected through pruning wounds, with fungi colonising the wood, causing dieback and eventual vine death. In the case of Eutypa dieback, stunting and yellowing of shoots and leaves is also observed. Cultural practices, such as the timing of pruning to avoid rainfall, can reduce the likelihood of infection, and disease control can be achieved preventatively through pruning wound treatment and curatively by remedial surgery. The latest research results and strategies for management of grapevine trunk diseases will be presented. These include avoiding larger pruning wounds made to the plant structure, pruning at the appropriate time and applying treatments carefully. Such an approach considers the future development of the vine and the space allocated to it, controlling branching and making smaller cuts rather than losing control of its growth and having to make multiple cuts to its permanent structure.

Jul 29, 2021 11:30 AM in Adelaide

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Dr Mark Sosnowski
Dr Mark Sosnowski leads the Horticulture Pathology sub-program at the South Australian Research and Development Institute and is an Affiliate Senior Lecturer at the University of Adelaide. Over the past 19 years, he has been responsible for research on managing Eutypa and Botryosphaeria dieback diseases in grapevines and almonds, in both Australia and New Zealand. He is the Australasian regional representative on the International Council for Grapevine Trunk Diseases and was the chair from 2014 to 2017. Dr Sosnowski draws from his extensive international experience and collaboration to provide industry with the latest information for effective management of grapevine diseases.
Mia Fischer
Mia Fischer is an Oenologist and Viticulturalist who studied in Stellenbosch, South Africa. She worked for almost a decade in ultra-premium wine production, under the guidance of Professor Denis Dubourdieu, who introduced the SIMONIT&SIRCH principles of respectful winter and spring pruning to his vineyards. The SIMONIT&SIRCH method (established by Marco Simonit and Pierpaolo Sirch) aims to strengthen and preserve vine structure, establish uniformity and reduce susceptibility to trunk disease (such as Eutypa and Esca). After obtaining firsthand experience in the SIMONIT&SIRCH principles and practices in South Africa and witnessing the benefits in wine quality, Mia subsequently joined the company, gaining additional experience abroad. She has operated in both Australia and USA, as a trainer and country manager.