eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-12-22 13 4 2015 2018 10.13005/bbra/2358 17321 article Mukesh Kumar 1 Sobita Simon 1 Department of Plant Pathology, Faculty of Agriculture, Sam Higginbottom Institute of Agriculture, Technology and Sciences (Deemed University) Allahabad 211007. Rice is suffering from several fungal diseases among them brown spot caused by Helminthosporium oryzae is important. In the present investigation, Results showed that the treatment Azadirachta indica@10% FS was found most effective treatment against brown leaf spot of rice. Minimum disease intensity was recorded significantly at 30, 45, 60, 75 days in treatment carbendazim (2.73, 6.21, 11.10, 21.09 %), as compared to the untreated control, Maximum  Plant height was recorded at 30, 60, 90 and number of tillers at 60 days after transplanting in treatment Azadirachta indica (19.43, 40.13, 58.73) and (23.6)as compared to control, on the other hand maximum fresh shoot weight and dry shoot weight was recorded at 110 and 120 days after transplanting in treatment Azadirachta indica (187.46), (26.04) compared to control, maximum fresh root weight and dry root weights was recorded at 110 and 120 days after transplanting in Azadirachta indica (37.46), (25.42) compared to controls. Maximum yield and cost benefited ratio was recorded in carbendazim (43.01 q/ha), (2.16) as compared to controls  respectively, So it may be concluded that botanical extracts can be use for the effective management of brown leaf spot of rice. https://www.biotech-asia.org/vol13no4/efficacy-of-certain-botanical-extracts-in-the-management-of-brown-leaf-spot-of-rice-cause-by-helminthosporium-oryzae/ Azadirachta indica; botanicals; brown leaf spot disease; chemical; rice