Sclerotinia stem rot has been found in hemp fields in most years. The level of damage and yield loss is yet to be determined. Sclerotinia sclerotiorum and Botrytis cinerea have been found in the stalk portion of the plant similar to Canola as well as later infections that have caused damage and grain loss in the head.

Wild mustard and volunteer canola, or adjacent canola stands can be the source of Sclerotinia stem rot infections. Adequate rotation with non-susceptible crops, ensuring seed free of disease organisms, and management of host species are the key approaches to manage disease risk.