Symptoms of sclerotinia stem rot on soybean. Note the presence of sclerotia on the stem surface.
Fabrício Ávila Rodrigues Viçosa Federal University, Department of Plant Pathology, Laboratory of Host-Parasite InteractionEmail: fabricio@ufv.br
Sclerotinia stem rot of soybean is caused by the fungus Sclerotinia sclerotiorum. This pathogen has an extremely wide host range and can affect more than 400 plant species, including oilseed, vegetable and forage legume crops. S. sclerotiorum causes the disease known as white mold. Stem rot outbreaks in soybeans is a serious problem in soybean fields in Brazil. The pathogen survives from year to year as hard dark structures called sclerotia. Sclerotia are variously shaped bodies of tightly packed white mycelium covered with a dark, melanized protective coat. Sclerotia are produced within a stem or pod or on the plant surface.
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