EFFICACY OF SOME BOTANICALS AND FUNGICIDES IN CONTROLLING LEAF BLIGHT OF MUSTARD

Abstract

The efficacy of some selected fungicides and botanicals were evaluated against Alternaria brassicae and Alternaria brassicicola causing leaf blight of mustard (var. BARl sharisha-15). Experiments were conducted at the farm of Bangladesh Agricultural Reasearch Institute, Gajipur, Joydebpur during rabi season from the month of October 2009 to March 2010. Three fungicides viz. Alphadeone, Aristodeone, Movral and three botanical extracts viz. Garlic clove extract, Tulshi and Dhutora leaf extract were employed in the experiment. Among the fungicides and botanicals tested, movral showed the best performance in reducing disease severity as well as increasing seed yield against gray blight of mustard. Leaf infection by Alternaria sp was reduced by 51.17 .%and seed yield was increased by 20.64 % over control by the application of Movral. No promising results were shown by the botanicals against leaf blight of mustard.