In Vitro efficacy of essential oils on mycelial growth of Magnaporthe griseaca using blast in basmati rice

Abstract

Management of Pyriculari agrisea by eco-friendly approaches is promising. In this study the essential oils from Coriander sativum (Coriander), Azadirachta indica (Neem) and Syzygium aromaticum (Clove) were tested against Pyricularia grisea in vitro by poison food technique. The pure culture of P. grisea was allowed to grow at 300ppm, 500ppm and 1000ppm concentration of essential oils on PDA medium. Clove oil was found most effective to inhibit mycelial growth completely at 300, 500 and 1000ppm after72 hrs, 96 hrs and 120 hrs. Next effective oil was observed neem oil followed by coriander oil. This indicated that clove oil is most effective against P. oryzae pathogen. Neem and coriander oil is less effective. The results of the current study indicated that each of the three essential oils tested, reduced the radial growth of P. oryzae.