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The essential oils obtained from three varieties of Foeniculum vulgare Mill. (dulce, vulgare and azoricum) harvested at three ontogenic stages (early, late waxy and ripe seed) were evaluated for their chemical composition and biological activity. (E)-anethole, limonene and fenchone contents were greatly influenced by the varieties and by the harvesting times. The antibacterial activity of the various oils against 25 microorganisms was evaluated. The inhibition of Aeromonas hydrophila, Alcaligenes faecalis and Clostridium sporogenes was of particular interest and there was a marked antifungal potency against Aspergillus niger.
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Marotti et al. (1994) studied this question.
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