Wine grape fungus devastates harvest Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Deans Marsh’s Roger Blake of Blake’s Estate said he was relieved that his crop survived a downy mildew infection. Contact the authorby Jennifer Chiu May 2, 2011 A fungus has devastated grape crops across Colac district wineries. Unlock full access to Colac Herald - Subscribe today! Subscribe Now Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)