Management of Root Rot (Rhizoctonia solani) of Fenugreek through Newer Combined Formulations of Fungicides

Abstract

Background: Root rot disease of fenugreek caused by Rhizoctonia solani has become a severe menace to the growers of Rajasthan as well as India. This pathogen survives in soil, causes damping off and root rot symptoms and responsible nearly for 50 per cent disease incidence and yield losses. Methods: During 2016-17 to 2017-18 cropping seasons, this study was carried out with the aim to manage the disease by means of using six fungicides including newer formulations (hexaconazole and tebuconazole + trifloxystrobin) under in vitro and field conditions. Result: The result of in vitro study with tebuconazole + trifloxystrobin was found to be most fungitoxic and inhibited mycelial growth cent per cent at 200 and 500 ppm concentrations. Seed treatment with tebuconazole + trifloxystrobin (@ 0.2%) was found highly effective in reducing disease incidence (83.12%) and in increasing seed yield (84.71%) under field conditions. Thus, it can be concluded that the use of newer combined formulation as seed treatment before sowing provide us alternative source to manage root rot disease of fenugreek.