Molds on vegetables at the time of harvest.

The mean numbers of colony-forming units of molds present on vegetables at the time of harvest were in the range of 4.2 X 10(3) to 6.7 X 10(3)/g for all vegetables except cucurbits and asparagus. The numbers were not influenced by cultivars within species, duration of the growing season, distant separation of the growing fields, or elevation above ground. Numbers increased with rainfall during either of 3 days before harvest and decreased when the mean daily temperature exceeded 24 degrees C. The most frequently isolated fungi were Aureobasidium pullulans, Fusarium species, Alternaria tenuis, Epicoccum nigrum, Mucor species, Chaetomium fimeti, Rhizopus nigricans, and Phoma species, in decreasing order. All other molds comprised less than 2% of the isolates. Aspergilli and penicillia occurred sporadically and in low numbers. Fusarium species were dominant on cucurbits.