Evaluation of fungicides for the management of blast diseases of rice under field condition

Abstract

Rice (Oryza sativa L.) is the principal staple food for more than two billion people; most of them live in rural and urban areas of tropical and subtropical Asia. An experiment was conducted during Kharif 2014 and 2015 to know the impact of eight fungicide treatments. Among eight treatments, Tricyclazole 45% + Hexaconazole 10% WG @ 1.0 g/L andTricyclazole 75% WP @ 0.6 g/L were on par with each other with least pooled leaf blast disease index of 21.15% and 23.25% and neck blast disease incidence of 17.43% and 19.65% respectively followed by followed by Tricyclazole 18% + Mancozeb 62% WP @ 2.5 g/L. Further, the highest pooled yield was recorded in Tricyclazole 45% + Hexaconazole 10% WG @ 1.0 g/L (4450 kg/ha) followed by Tricyclazole 75% WP @ 0.6 g/L (4001.85 kg/ ha). However, when cost benefit ratio was calculated, Tricyclazole 45% + Hexaconazole 10% WG (1.67) and Tricyclazole 75% WP (1.61) respectively.