Sclerotinia is a genus of fungi known for causing plant diseases, particularly in crops like soybeans, lettuce, and sunflowers. The most common species, Sclerotinia sclerotiorum, produces structures called sclerotia, which can survive in the soil for years, making it a persistent threat to agriculture. These fungi thrive in moist conditions and can lead to significant yield losses. Symptoms of infection include wilting, rot, and the presence of white mold on affected plants. Effective management strategies include crop rotation, proper irrigation practices, and the use of resistant plant varieties to minimize the impact of Sclerotinia diseases.