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

Fig. 3. The effect of leaf age on infection frequency (A) [number of lesion per cm2] and lesion area (B) of S. macularis on Symphony hop leaves in a controlled environment study. Infection frequency and lesion area were averaged across temperatures. Error bars indicate ± standard error.



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