Management of Alternaria alternata of blond Psyllium (Plantago ovata L.) through fungicides in vitro and natural condition

The experiments were conducted at Department of Plant Pathology, S.K.N. College of Agriculture, Jobner (Rajasthan). Alternaria alternata was isolated from leaves of isabgol and observed to be pathogenic under artificial conditions. An attempt was more find out the efficacy of different fungicides were against in Alternaria alternata in vitro and in vivo condition. Among five fungicides mancozeb + carbendazim was found most effective against Alternaria alternata in vitro conditions followed by mancozeb and carbendazim. In potted plant minimum disease intensity were obtained in mancozeb + carbenxazim and mancozeb followed by carbendazim + difencozole. All treatments as foliar sprays were able to reduce disease severity over untreated control of 0.2% followed by 0.25% concentration. Carbendazim + mancozeb, and mancozeb were found effective in management of leaf blight of isabgol by Alternaria alternata in vitro and in vivo conditions.