Vol. 8, Issue 8, Part J (2024)

Abstract: A survey was conducted at East Nimar, Khandwa (M.P.) during the Rabi (winter) season, 2022-23 on major onion growing farmer’s field five blocks viz., Khalwa, Chhaigaon Makhan, Khandwa, Punasa and Pandhana to record Incidence of Purple blotch of onion caused by Alternaria porri. The disease affected in all onion grown farmer’s field of Khandwa. The mean of percent disease incidence was ranged between 6.10 to 10.13%. The maximum PDI was observed in block Pandhana (10.13%) followed by block Khalwa (8.58%), Punasa (8.20%), Khandwa (7.18%), and the minimum PDI was recorded in Chhaigaon Makhan block (6.10%). In the field experiment, the efficacy of six fungicides was assessed during the Rabi season. The minimum percent disease incidence was observed with Tebuconazole (23.17%), followed by Propiconazole (25.22%), Hexaconazole (28.10%) and the maximum percent disease incidence was recorded with Thiophanate methyl (38.30%). The highest yield was observed with Tebuconazole and lowest yield in the Thiophanate methyl over the control plot.