Inhibitory effect of some plant extracts on mycelial growth and sporulation of Curvularia eragrostidis isolated from pearl millet

Abstract

: The efficacies of extracts from five plants  (Khaya senegalensis, Allium sativum, Zingiber officinale, Vitellaria paradora and Azadirachta indica) were evaluated for their inhibitory effect on mycelial growth and sporulation of Curvularia eragrostidis isolated from pearl millet.  Each plant material was air dried, powdered and surface sterilized with ethanol.  These were then soaked in sterile water for 24 hours and filtered through double layer of muslin cloth and incorporated in potato dextrose agar amended with streptomycin (PDAS) under aseptic environment.  The potato dextrose plant extracts agar were compared with Benomyl as standard check and untreated control. Mycelial growth was lowest in benomyl treated Petri dishes both at 7 and 14 days after inoculation (DAI) and highest on control Petri dishes.  All the plant extracts except Allium sativum did not differ significantly with control at 14 DAI.  The sporulation was highest in control and lowest in benomyl treated PDAS.  Azadirachta indica, Khaya senegalensis seeds and Allium sativum bulb stimulated the production of significantly fewer spores than control and did not differ from each other.  Spore size (length and width) was significantly reduced by the plant extracts evaluated.