Adenocalymma allicea, a new source of a natural fungitoxicant
Keywords:Adenoealymma allieea, Fungicidal essential oil, Drechslera oryzae
AbstractDuring the screening of leaves of some angiosperms for their volatile fungitoxicity, Adenocalymma allicea exhibited the strongest activity, completely inhibiting the mycelial growth of a test fungus, Drechslera oyzae. The active principle was isolated in the form of a volatile oil which was found to be fungicidal at its minimum inhibitory concentration of 500 ppm. It inhibited heavy inoculum and exhibited a quick killing action as well as thermostable toxicity. The oil also exhibited a broad fungitoxic spectrum and was found to be more active than some commercial fungicides tested; it was found to be non-phytotoxic to the host plant, stimulatory to nitrate reductase activity and able to prevent leaf-spot disease of paddy.