CPN 1026. Published September 1, 2021. DOI: doi.org/10.31274/cpn-20210607-0
Damon Smith, University of Wisconsin; Adam Sisson, Iowa State University; Martin Chilvers, Michigan State University; Mehdi Kabbage, University of Wisconsin-Madison; Megan McCaghey, University of California-Davis; and Jamie Willbur, Michigan State University.
White mold (also known as Sclerotinia stem rot) is an important soybean disease in the northern United States and Canada. Caused by the fungus Sclerotinia sclerotiorum, white mold can vary in incidence and severity from year to year due to the prevailing environmental conditions. Soybean yield can be greatly reduced by white mold, particularly if climate and management practices favor high yield potential (e.g., early dense canopy).
Characteristic white mold symptoms and signs. Image: Adam Sisson
White mold often ranks among the top yield-reducing soybean diseases in the northern United States. Researchers estimate that white mold caused more than 101 million bushels of soybean yield loss in the U.S. and Ontario, Canada from 2010 to 2014 (Allen et al., 2017). Losses were much higher from 2015 to 2019, when yield reduction caused by white mold was estimated to have exceeded 201 million bushels (Bradley et al., 2021).
Developing a white mold management plan based on field history and best practices can reduce yield losses caused by white mold. Integrating several management practices including cultural control, varietal resistance, and chemical and biological control can form an effective management plan for white mold.
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Click the link below to download this publication.White Mold Preface and Introduction