Background and Aims
Ripe rot (Colletotrichum acutatum) and bitter rot (Greeneria uvicola) are two bunch rot diseases of grapes that occur in warm and wet conditions close to harvest. Management practices for the more commonly occurring bunch rot, Botrytis grey mould, appear to be ineffective for these other bunch rots. Pyraclostrobin has been previously reported to inhibit the growth of the fungi responsible for these rots in vitro. The aim of this work was to evaluate Cabrio (a.i. pyraclostrobin) as a fungicide for bitter rot and ripe rot management in vineyards.