Botryosphaeria dieback (formerly known as bot canker) is a grapevine trunk disease caused by fungal pathogens that grow primarily in mature wood. Botryosphaeria dieback is characterised by a range of symptoms affecting a number of vegetative structures of the grapevine.
There are a number of strategies that can be implemented to manage botryosphaeria dieback, although there are no fungicides registered specifically for control. The aim is either:
1. prevention, by breaking the disease cycle, removing inoculum source, and reducing the risk of further infection; or
2. recovery, reducing the impact on the vineyard by bringing diseased grapevines back into full production.
It is important to practise good hygiene around the vineyard to remove infection sources and avoid cross contamination, similar to managing other fungal diseases. It is also essential to time operations, such as pruning, to minimise the risk of disease spread by avoiding high risk infection periods.