Effect of biotic and abiotic formulations on control of Botrytis blight of rose cv. Grand Gala

Abstract: The present investigation was undertaken at the Model Floriculture Centre, G.B. Pant University of Agricultural and Technology, Pantnagar. The experiment was conducted to test the different concentrations and time of application of biotic formulation, i.e., Bacillus subtilis var. amyloliquifaciens strain FZB24 (manufactured by Novozyme South Asian Pvt. Ltd. under the brand name Taegro) and abiotic formulation i.e., sodium bicarbonate and acetic acid on control of Botrytis blight of rose cv. Grand Gala under field condition and during vase life. Foliar spray of standard chemical Carbendazim 50% W.P. @ 500g/ha, 6 spray at 7 days interval was found best followed by Carbendazim 50% W.P. @ 500g/ha, 3 spray at 14 days intervals which was at par with Bacillus subtilis @ 1000 g per hectare, 6 spray at 7 days interval against incidence of Botrytis blight in field condition while, during vase life, application of treatment was insignificant. In contrast, acetic acid and sodium bicarbonate do not significantly affect disease control.