Walt Mahaffee, USDA, and Brent Warneke, Oregon State University, are researching how to improve the efficiency of grape production by optimizing fungicide selection and timing to manage powdery mildew of grape berries. This research will determine the most effective fungicide application timing with relation to grape inflorescence development / phenological stage and how fungicide mobility impacts disease development. Read more about this OWB-funded resesarch project.