Abstract
Surveys carried out in Jamaica failed to reveal the type of cigar-end disease in which Verticillium theobromae is the sole associated fungus. All cigar-end specimens found were infected with both V. theobromae and Deightoniella torulosa . Conidium germination in V. theobromae failed below 98% r.h. and was maximal in a film of water on glass or banana-fruit peel. There was no evidence that germ tubes of this fungus can penetrate the healthy and uninjured cuticle and epidermis cell wall of banana fruits. In the field, typical cigar-end symptoms developed on some sun-scorched fruits which had been inoculated with conidia of V. theobromae ; unscorched, inoculated fruits remained free from cigar-end. In the laboratory, mycelial inoculum of V. theobromae caused slight decay of fruits at 80°F. but little or no decay at 50–70°. The infection biology of V. theobromae is discussed. Several records of Fusarium moniliforme var. subglutinans and other species of Fusarium , associated with finger-tip rot of bananas and plantains in Jamaica, are reported.
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