Abstract
A high percentage of Stromatinia gladioli (Drayt.) Whetz. sclerotia survived over 5 years' burial in the field. Sclerotia acted as a source of infection for Gladiolus, although pure culture sclerotia required a period of burial in soil before becoming infective. The sclerotia were highly resistant to desiccation. S. gladioli mycelium had a low competitive saprophytic ability in soil. Spread of the disease in rows of gladioli was dependent upon the plant to plant spacing and was greatest when plants were in close proximity. It is concluded that S. gladioli persists in the absence of host plants as sclerotia rather than as growing mycelium.
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