Incidence of grapevine bunchstem necrosis in South Australia: effects of region, year and pruning

摘要: The incidence of grapevine bunchstem necrosis (BSN) in cv. Cabernet Sauvignon was assessed three South Australian regions during years. percentage bunches affected varied widely—from nil to 26%‐between years and regions. At the site with most BSN, high related lower temperatures 20 days before flowering not low flowering. Also, higher when rain fell veraison. Minimally pruned vines had significantly less BSN than spur‐pruned each test