Bio-efficacy evaluation of azoxystrobin 23% SC on potato for the control of late blight disease under the gangetic plains of West Bengal

Abstract

A field experiment was carried out to evaluate the bio-effectiveness of Azoxystrobin 23% SC against the control of late blight disease of potato its persistence, phytotoxicity and effect on residual level and tuber quality. Experimental findings indicate that effiectiveness of the fungicidal products of Azoxystrobin (Rainbow) 23% SC to increase crop yield and terminal disease incidence values were found to be the lowest (11.97%) when treated with Azoxystrobin 23% SC (Rainbow) @ 600 ml/ha followed by Azoxystrobin 23% SC (Rainbow) @ 500 ml/ha (14.17%). The per cent reduction in disease incidence was also recorded maximum (81.15%) when treated with Azoxystrobin 23% SC (Rainbow) @ 600 ml/ha over un-treated plot.