Susceptibility of Pineapple Cultivars to Fruit Diseases Incited by Penicillium funiculosum and Fusarium moniliforme

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Abstract
Several unnamed pineapple [Ananas comosus] cultivars were inoculated in 2 successive years with P. funiculosum and F. moniliforme 1, 4 and 7 wk following chemically-induced flowering. Unnamed cultivars A, D and a commercial cultivar, ''Smooth Cayenne'' (cultivar X) were highly susceptible to fruitlet core rot (FCR) incited by P. funiculosum. Cultivar C was highly susceptible to FCR incited by F. moniliforme. Cultivar B was susceptible to FCR incited by F. moniliforme in fruit harvested in 1974 but not susceptible in 1975. In 1975, all cultivars were susceptible to FCR incited by P. funiculosum. Symptoms of FCR incited by F. moniliforme were greatest in fruit harvested in Feb.-March of both years and those incited by P. funiculosum were greatest in April - July. Cultivars A and X were significantly more susceptible to interfruitlet corking (IFC) than cultivars B and C. Cultivar A was significantly more susceptible to leathery pocket (LP) than cultivars B and X. Interfruitlet corking and LP were induced only by P. funiculosum and were most severe in harvests for April-June 1974 and April-July, 1975.

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