Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; keverts@umd.edu
A new supplemental label for use of Presidio on cucurbits was issued this spring. It addresses resistance management, specifically for cucurbit downy mildew. In order to minimize the buildup of resistance, the label now stipulates a 4 fl oz/A use rate, no back-to-back applications, and it limits the number of applications to 2 per season (down from 4 previously).