Received: 15 October 2019; Accepted: 12 December 2019

Abstract

Field experiments were conducted at Rice Research Station, Kerala Agricultural University, Moncompu during Kharif 2012, Kharif 2013 and Rabi 2013-14 to evaluate the fungicides against sheath blight and glume discoloration. The six fungicides evaluated were trifloxystrobin25%+tebuconazole 50% 75 WG (Nativo), kresoxim methyl (Ergon 44.3 SC), azoxystrobin 25 SC (Amistar), tricyclazole 75 WP (Beam), carbendazim 50 WP (Bavistin) and propiconazole 25 EC (Tilt). The pooled analysis of three seasons data showed that trifloxystrobin 25%+tebuconazole 50% 75 WG @ 0.4 g/l and azoxystrobin 25 SC @ 1 ml/l were found equally effective against the sheath blight and glume discoloration than other molecules. It was promoted as farm trials at 7 different farmers field during Rabi 2014-15, and proved that the azoxystrobin 25 SC @ 1 ml/l and trifloxystrobin 25%+tebuconazole 50% 75 WG @ 0.4 g/l restricted the incidence of sheath blight (18.12 and 21.52 %) and glume discoloration panicles (12.16 and 12.01 %) and spikelets (8.97 and 9.56%) than standard check fungicide carbendazim @ 1g/l (28.26, 12.69 and 9.76 % ). Highest yield (6930 kg/ha) was recorded by the azoxystrobin 25 SC followed by trifloxystrobin 25%+tebuconazole 50% 75 WG (6732 Kg/ha) and standard check fungicide (6464 Kg/ha).