This article is about tips & tricks on managing Botrytis in blueberries. Botrytis causes blossom blight during the flowering period, & fruit rot during post harvest handling and storage. Infections occur in the field during flowering, so the most effective time to implement controls is during flowering. The fungus survives as dormant mycelium or sclerotia (fruiting body) in fruit and other plant debris. Spores are spread by wind or water-splash.