The wet growing season of 2019 resulted in some serious disease issues in sunflowers in some areas of South Dakota. Diseases caused by the fungus Sclerotinia sclerotiorum, include Sclerotinia wilt/basal stalk rot; mid-stem rot; and head rot. This fungus is already known to cause “white mold” in many crops such as soybean, dry edible beans, canola, and broad-leaf weeds.
Fungicides Not Effective
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