In vitro evaluation of plant extracts against Alternaria brassicae (Berk.) Sacc. causing leaf spot of mustard and Fusarium oxysporum f. sp. lycopersici causing wilt of tomato

摘要

Extracts of five plants viz.Azadirachta indica, Lantana camara, Ocimum sanctum, Eucalyptus globulusandCalotropis giganteawere evaluatedin vitroby poison food technique (PFT) @ 3, 5, 7 and 9% concentrations againstAlternaria brassicaeandFusariumoxysporum f. sp.lycopersicicausing blight of mustard and wilt of tomato respectively.In vitrostudy onA. brassicaerevealed that all five plant extracts at all four concentrations significantly inhibited the mycelial growth of this pathogen as compared to control. HoweverO. sanctumwas found most efficacious with growth inhibition of (31.85%) followed byE. globulus(28.97%) andL. camara(23.60%). While inin vitrostudy ofF. oxysporumf. sp.lycopersiciA. indicaextract was found most efficacious with growth inhibition of (29.33%) followed byE. globulusextract (28.72%). Therefore more evaluations in the green house of field experiments may validate their antifungal activity.