Vol. 12, Issue 9 (2023)

Onion (Allium cepa L.) is a widely cultivated bulbous vegetable crop appreciated globally for its strong taste and distinct flavour. The crop was infected by plethora of economically important diseases. One among these diseases is twister blight, caused by Colletotrichum gloeosporioides resulting in substantial yield losses. Due to the scarcity of available information on disease management aspects, a study was emphasized for the management of disease under in vitro conditions using different fungicides, botanicals and bioagents at different concentrations. Among the seven fungicides evaluated, propiconazole, tebuconazole + trifloxystrobin and kresoxim-methyl at tested concentrations were proved to be effective in inhibiting the pathogen. Among the different botanicals tested, lemongrass oil at 15 per cent concentration was found to be most effective, showing cent per cent mycelial growth inhibition. Bacillus subtilis and Trichoderma reesei were noted as most effective among the tested bioagents with 87.11 and 75.31 per cent inhibition rate respectively.