Sour rot is a late season bunch rot that affects many cultivars of wine grapes worldwide and is a challenging disease to manage, especially for Missouri vineyards. In this presentation, graduate student Patrick Kenney introduces sour rot, which is a disease complex of yeast, acetic acid bacteria, and fruit flies (Drosophila spp.). Patrick covers chemical management by presenting data on spray trials conducted in Missouri that address timing of applications as well as the importance of scouting and early detection of fruit flies. The research presented here was made possible by the Missouri Wine and Grape Board Research Committee Grant.
REVISED: November 17, 2020