Abstract

The fungal counts per gram of air-dried dates, of eight local date-palm varieties, varied markedly on different synthetic media. Seri and Shakra varieties had highest fungal counts whereas Medina had the lowest. Aspergilus flavus, A. niger, Penicillium rubrum, P. oxalicum, Rhizopus stolonifer, Stemphylium verruculosum and Fusarium sp. were generally associated with various date varieties. Apparent colonization of the fungi was obtained by increasing the relative humidity to 90% at 30 and 40°C. Best growth of the isolated fungi in artificial media was obtained at 60% glucose concentration.

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