Efficacy of Euphorbia splendens and Leonotis nepetaefolia on aflatoxin producing fungi Aspergillus flavus and Aspergillus parasiticus.
Efficacy of three different concentrations (5, 10 and 15 mg/ml) of dry flower powder of E. splendens and L. nepetaefolia was tested on the growth of aflatoxin-producing toxigenic strains of fungi A. flavus (NCBT 101) and A. parasiticus (NCBT 128) in Sabouraud dextrose agar medium (SDA). Maximum (75%) inhibition of growth of A. flavus was seen at 15 mg/ml concentration of E. splendens flower dry powder, while A. parasiticus showed 50% inhibition of growth at 10 and 15 mg/ml concentrations. Total inhibition (100%) of growth of A. flavus was seen at 10 and 15 mg/ml for L. nepetaefolia and maximum (75%) inhibition of growth was seen for A. parasiticus at 15 mg/ml concentration. Bioassay with groundnut seeds soaked with different concentrations of flower extract proved that both fungi were incapable of infecting the seeds at 10 and 15 mg/ml of L. nepetaefolia flower extracts.
Research Department of Botany, National College, Tiruchirapalli 620 001, India.
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MN
Abubacker
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Ramanathan
D000348:Aflatoxins / Q000096:biosynthesis*; D001230:Aspergillus / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D028481:Euphorbia / Q000737:chemistry*; D019686:Lamiaceae / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D013045:Species Specificity
D000348:Aflatoxins