Development of Management Strategies for Hop Powdery Mildew in the Pacific Northwest

Fig. 4. Regional disease progress curves of hop powdery mildew incidence for the year 2000. Data points represent mean incidence of powdery mildewed plants from transects surveyed in the region and month indicated on the graph.



Image from Plant Health Progress article:
Development of Management Strategies for Hop Powdery Mildew in the Pacific Northwest