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Pakistan Journal of Biological Sciences
Year: 2001  |  Volume: 4  |  Issue: 2  |  Page No.: 178 - 180

Efficacy of Fungicides and Botanicals in Controlling Leaf Blight of Wheat and its Cost Benefit Analysis

I. Hossain, M.H. Rahman, F.M. Aminuzzaman and F. Ahmed    

Abstract: The efficacy of three fungicides viz. Tilt 250 EC, Bavistin, Pencozeb and botanicals viz. Allium sativum (clove), Nigella sativa (seed), Lawsonia alba (leaf) and Cymbopogon citratus (oil) were evaluated for leaf blight (Bipolaris sorokiniana) and grain yield of wheat cv. Kanchan under field condition. All the fungicides showed significant effect in controlling leaf blight of wheat cv. Kanchan. The highest reduction of the disease was recorded in plots that received Tilt 250 EC (0.1%) followed by Pencozeb (0.2%). Maximum grain yield of 3.89 t/ha with the gross margin of US$ 881.24/ha which 22.80% increase over the control was obtained by using Tilt which was followed by Pencozeb (10.01%). Among botanicals, leaf extract of Lawsonia alba resulted an increase of gross margin of US$ 731.78/ha which is 1.98% increase over the untreated control. Tilt 250 EC, Bavistin, Pencozeb and Lawsonia alba showed 13.16, 3.71, 9.31 and 8.39 BCR, respectively, while others resulted negative response.

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