Stapelia gigantea, an ornamental succulent of family Asclepiadaceae was observed infected by a rot in Ayodhya of Faizabad district during September 1979. The fungus was isolated on PDA medium and was indentified as Sclerotium rolfsii Sacc. The specimen has been deposited in the Department of Botany, K.S.S. P.G. College, Faizabad (Accession No. 649).
The disease stars as small pin head size, black submerged spots near the ground which gradually enlarge and merged together to form irregular larger patches. The spots progress upward and within a fortnight involve the entire plant that by this time shows characteristic dry rot. The pathogenecity test performed by standards methods gave the positive results.
Sclerotium rolfsii is known to cause rot disease of Dianthus sp, Delphinium ajacis and Polyanthus tuberosa and Zinnia in India. Its association with Stapelia gigantea is a new record. (PDF copy at Slideshare.net)
Cited this as: R.S. Kanaujia (1982): Sclerotial rot of Stapelia gigantea new to India. Indian Journal of Mycology and Plant Pathology. 12(3):328.