Rice is the most staple cereal crop of Bangladesh and rice blast caused by Magnaporthe oryzae oryzae (MoO) has become a major factor limiting rice yield in Bangladesh and throughout the world. Eight botanicals extracted both in water and ethanol namely Kalijira ( Nigella sativa ), Turmeric ( Curcuma lon ga ), Ginger ( Zingiber officinalis ), Garlic ( Allium sativum ), Onion ( Allium ce pa ), Neem ( Azadirachta indica ), Allamanda ( Allamanda cathartica ) and Aloevera ( Aloe vera ) were tested against MoO in vitro in the Mycology Laborato ry, Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. All the botanicals significantly reduced radial growth of the tested pathogen. Maximum mycelia growth inhibition of MoO was achieved with water extract of turmeric (1:1 w/v) and ethanol extracts of neem (1:4 w/v) with 86.57% and 92.62% mycelia growth inhibition at 14 DAI, respectively.
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