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Pruning back grapevine trunk disease
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Dr Mark Sosnowski, Matthew Ayres and Dr Trevor Wicks are developing practical and efficient methods for controlling eutypa. |
A SARDI research program, in collaboration with the University of Adelaide, is developing effective control strategies for eutypa dieback, an insidious disease of grapevines.
The disease infects vines during pruning and establishes itself in the cordons and trunks, severely reducing yield and eventually killing the vine.
The current research program builds on research conducted at the University of Adelaide and SARDI since the 1970’s.
Typically known as a disease of older vines, recent extensive surveys indicate that eutypa is becoming a threat to younger vines in emerging regions.
Results also reveal that environmental stress on vines appears to promote disease development. With the threat of severe and extreme environmental events increasing due to the impacts of climate change, the impact of this disease could escalate.
Collaboration with other researchers in Australia and abroad has led to more rapid advances in trunk disease research, especially with the recent increase in exchange of students and researchers between SARDI and a number of international organisations. According to the International Council of Grapevine Trunk Diseases, SARDI is considered a world leader in grapevine trunk disease research.
SARDI researchers, Matthew Ayres, Dr Mark Sosnowski and Dr Trevor Wicks are currently working on developing practical and efficient methods for controlling eutypa.
The team is working with regional grower groups to establish trials in commercial vineyards which will demonstrate strategies for growers to manage the disease. The aim is to find effective methods for the protection of pruning wounds and to develop sustainable management options which will benefit industry and the environment.
The most effective strategy for controlling the disease at present is through the protection of pruning wounds from new infection and the complete removal of infected material in already diseased vines. The research, funded by the Grape and Wine Research and Development Corporation with support from industry groups and agrochemical companies will evaluate a range of fungicides and alternative products, and examine application techniques using commercial spray equipment.
Currently, no fungicides are registered for eutypa control via spray application on grapevines in Australia. It is anticipated that the trials will help lead to the registration of products for use following pruning.
The team is also developing a new greenhouse assay which will enhance the research program. The techniques will allow for a greater throughput and faster evaluation of products for the control of eutypa and other trunk diseases. The techniques will also provide a tool for epidemiological studies which underpin the disease management strategies.
The researchers regularly provide a range of extension activities including media releases, industry group presentations and workshops in order to keep the industry abreast of the latest research developments. The research has received enthusiastic support from industry partners and builds upon the close ties already established between SARDI and the grape growing industry.
Further information contact Mark Sosnowski 8303 9489 or SARDI Communications Terry Price 8303 9433/ 0423 292867
