Comparative efficacy of registered fungicides for management of white mold in soybeans

Plant pathologist Michael Wunsch has prepared a data summary of the comparative efficacy of registered fungicides for management of white mold in soybeans.  Included are data for all registered fungicides evaluated at least three times since 2019.  

Beginning in 2019, fungicide efficacy testing for white mold management in soybeans was conducted with fungicide droplet size calibrated relative to canopy closure.  Previously, fungicides were always tested with fine droplets, irrespective of canopy characteristics.  Calibrated fungicide droplet size relative to canopy closure has improved white mold management across all fungicides, particularly among those fungicides that have intermediate efficacy against white mold.  

The most effective fungicides against white mold in soybeans remain the same, but the difference in performance between the best fungicides and fungicides of intermediate efficacy has narrowed.   A PDF summary is available at the NDSU Carrington website at https://www.ndsu.edu/agriculture/ag-hub/research-extension-centers-recs/carrington-rec/research/plant-pathology.

Michael Wunsch, Ph. D.
Michael.Wunsch@ndsu.edu
Plant Pathologist