Dewprakash Patel*, N. Lakpale, A.S. Kotasthaneand Deepti Jha
Department of Plant Pathology, Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh)
Received-02.07.2023, Revised-14.07.2023, Accepted-25.07.2023
Abstract: Brown leaf spot disease of potato caused by Alternaria alternata has been known as one of the destructive and common diseases of potato and occurred worldwide. In vitro evaluation of plant extracts, Euphorbia tithymaloides (Nagdon) was found most effective followed by Jasminum spp (Jasmine) and Eclipta prostrate (Bhringraj). Highest mycelial growth inhibition (71.86%) was recorded at 10% concentration of Trichoderma viride culture filtrate followed by Trichoderma viride (60.74% reduction) and Pseudomonas fluorescens (34.81% growth reduction) over to control. Among the different fungicides, Hexaconazole 4% + Zineb 68% WP at 0.3% concentration exhibited nearly 100% reduction in mycelial growth over to control treatment (90.00 mm radial growth) at par with Hexaconazole 5% EC at 0.2%, Captan 70% + Hexaconazole 5% WP at 0.3% followed by Fluopyram 17.7% + Tebuconazole 17.7% SC at 0.2% with 92.59% mycelial growth reduction and Tebuconazole 50% + Trifloxystrobin 25% SC at 0.2% with 91.48% reduction over to control at 7 DAI.
Keywords: Potato, Alternaria alternata, plant extract, bio agents, fungicide, in vitro
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