Crude methanolic extracts of 10 Marine algae (6 Ulvaceae and 4 Dictyotaceae) of Benghazi coasts collected during different seasons were tested in vitro for their antifungal activities against 5 fungi. Statistical data highlighted significant differences of antifungal activities between algal species with special reference to Dictyotaceae. Extracts of Dictyota linearis and Dictyota dichotoma were relatively more effective (25.36 and 23.82 mm, respectively) against the tested fungi, while extracts of Ulva lactuca was relatively low (16.13 mm). Statistically, the interaction between algal and fungal types didn't affect the activities of methanolic algal extracts. Aspergillus flavus was the relatively resistant fungus (17.01 mm) while, Penicellium sp. was the relatively sensitive one (22.42 mm). All tested fungi were significantly affected by season's difference with special reference to spring and summer.
Key words: Methanolic extracts, Antifungal Activities, Ulvaceae and Dictyotaceae
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