Enough water should be applied at each irrigation to permit thorough and prolonged drying of the soil surface before the next application. Excessive vine damage should be avoided. A fungicide program is usually required where Sclerotinia is a problem. Proper timing and use of an appropriate method of application are essential for maximum disease control. Fungicides should be applied in a preventative manner to achieve thorough coverage of basal stems.
Fungicides only protect healthy plant parts from infection.
They do not cure established infections or kill sclerotia. Soilborne Blight Diseases of Peanuts .