Efficacy of New Combination Fungicide against Rice Sheath Blight Caused by Rhizoctonia solani (Kuhn)

A new combination fungicide having azoxystrobin 18.2% and difenoconazole 11.4% SC was tested against rice sheath blight disease under field conditions during kharif 2010-11 and 2011-12 seasons. The combination fungicide @ 1.25 ml/l and 1.0 ml/l was found effective against sheath blight recording least disease incidence of 9.36% and 16.43% respectively. Similarly, disease severity of 17.19% and 21.37% was recorded as against 72.09% and 78.21% in untreated check. Standard recommended fungicide, hexaconazole 5% EC was also effective showing disease incidence and severity of 23.09% and 31.06% respectively. Azoxystrobin 23 SC alone was also found effective which recorded sheath blight incidence and severity of 27.06% and 32.89%.