Causes and Control of Cantaloupe Postharvest Wastage in Australia

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Abstract
Wastage of cantaloupe melons (C. melo var. reticulatus) by postharvest diseases in Australia is caused by species of Fusarium, Geotrichum, Rhizopus, Cladosporium and Alternaria. Agar plates amended with fungicides were inoculated with isolates of each of these organisms. Benomyl, guazatine, imazalil, fenapanil (.alpha.-butyl-.alpha.-phenyl-1H-imidazole-1-propanenitrile), sodium-o-phenylphenate. TD 5056 (2-methylsulphanil-6-nitrobenzothiazole), thiabendazole, thiram and tridemorph reduced the growth of two or more of the test organisms by at least 90% relative to controls. Captan, dichloran and fenaminosulf were less inhibitory but affected all or most of the test organisms. In tests with wound-inoculated fruit, benomyl controlled F. solani only. Guazatine reduced wastage due to G. candidum, Alternaria sp., F. solani and R. oryzae. Guazatine and benomyl have potential use for the control of cantaloupe postharvest wastage.

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