Grapevine Powdery Mildew (Erysiphe necator) incidence and severity in field trials experiments.

* Treatment conditions are described in Table 2.§ Incidence was defined as the percentage of grape clusters with powdery mildew within a sample of 20 clusters. Severity was expressed as the percent of berries infected per cluster.ф DAA—means days after application.¥ Means followed by the same letter do not significantly differ (P = 0.05, Duncan´s New MRT). Mean comparisons performed only when AOV Treatment P(F) is significant at mean comparison OSL.Grapevine Powdery Mildew (Erysiphe necator) incidence and severity in field trials experiments.