Combining penthiopyrad with azoxystrobin is an effective alternative to control seedling damping-off caused by Rhizoctonia solani on sugar beet

The soil-borne fungus Rhizoctonia solani causes damping-off on sugar beet seedlings. Growers rely fungicides to protect in fields affected by R. solani. Quinone outside inhibitor (QoI) fungicides, such as azoxystrobin, have been applied in-furrow and foliar sprays manage solani, but repeated use of QoI pose risks fungicide resistance. Penthiopyrad is a novel with the succinate dehydrogenase (SDHI) mode action. objectives this study were compare efficacy penthiopyrad used sole seed treatment versus azoxystrobin an or post-planting application for controlling solani; determine if combined can improve control over treatment, spray application. Seedling survival rate area under disease progress curve (AUDPC) seedling loss measure each treatment. A at 14 g a. i. kg−1 seeds, treatments 7 seeds one days after planting resulted similar AUDPC achieved standard However, alone failed damping-off. Our research suggests that be provide early protection vulnerable seedlings while ensuing adult plants.