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

Fig. 1. Symptoms of powdery mildew on: A, an emerging shoot completely colonized by S. macularis, i.e., a flagshoot; B, a close-up of a colony on a leaf; C, a female flower; D, undeveloped; and E, developed cones



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