A Decade of Hop Powdery Mildew in the Pacific Northwest

Fig. 7. Incidence (%) of hop leaves with powdery mildew in relation to herbicide treatments to remove basal leaf growth, Granger, Washington, 2002. Applications of Aim EW (carfentrazone-ethyl) were applied 6 July, 3 August, and 20 August. Applications of Gramoxone Max (paraquat) + Desicate II (endothall) were applied 6 July and 3 Aug 2002. Data are means of three replications ± standard error.



Image from Plant Health Progress article:
A Decade of Hop Powdery Mildew in the Pacific Northwest