Responding to an Introduced Pathogen: <i>Podosphaera macularis </i>(Hop powdery mildew) in the Pacific Northwest

Fig. 1B. Example of regional map generated from weather networks. Model values are determined for each weather station and values between sites are interpolated using geostatistics. Color coding is provided for the map index values. (A) Regional map of the Willamette Valley, Oregon; (B, shown here) Regional map of the Yakima Valley, Washington.



Image from Plant Health Progress article:
Responding to an Introduced Pathogen: Podosphaera macularis (Hop powdery mildew) in the Pacific Northwest