Efficacy of fungicides, and resistance among cultivars, in the control of strawberry powdery mildew

Abstract

We investigated the efficacy of fungicides and differences among cultivars in resistance against strawberry powdery mildew. Ten fungicides were applied to strawberry plants, on three occasions, at seven days intervals. Relative to the untreated plants, disease severity was significantly reduced by eight of the fungicides after the second application, and by ten of the fungicides after the third application. Of the seven strawberry cultivars tested, the three with the highest disease resistance, from most to least resistant, were Yumenoka, Kaorino, and Akihime. These results indicate that multiple applications of fungicides and the use of resistant cultivars can effectively control strawberry powdery mildew.