Meg McGrath, the Mildew Guru from Cornell, spoke with us today to talk all about powdery mildew in vine crops! Meg has spent a career learning how pathogens survive between crops, investigating factors that favor disease development, evaluating fungicides and resistant varieties, developing scouting protocols and action thresholds for timing the initiation of fungicide applications after disease detection.

Here is the main page of resources that Meg has put together on this topic.
https://www.vegetables.cornell.edu/crops/cucurbits/cucurbit-powdery-mildew/

This page includes downloadable lists of varieties that are marketed as having resistance to powdery mildew (and other diseases and disorders), updated conventional fungicide recommendations, and also a comprehensive collection of microbial and oil-based fungicides that are OMRI-listed.