NY536 - Development of Steam-Air Treatments to Control Seed-Borne Diseases of Vegetables and Flowers

Steam-air treatments of 50C and 52C for 30 minutes successfully controlled the seed-borne fungi Botrytis allii, Fusarium oxysporum, Stemphylium vesicarium and Penicillium sp in onion seed without affecting seed germination capacity, in this 1995-96 project. Control of a fifth seedborne disease, Aspergillus niger was not achieved in onions by any of the steam-air treatments. This report details the success of steam-air treatment for control of seedborne fungi in onions and basil, and its lack of success in controlling the same fungi in zinnias and marigolds.