Field Evaluation of New Fungicides Against Blast of Rice

An investigation was carried out for three consecutive years during Kharif seasons (1994–96) to evaluate the efficacy of new fungicides for the management of blast of rice caused by Pyricularia grisea, in a highly blast susceptible native cultivar Pankhali-203. Five fungicides viz. cyproconazole (@ 0.1%), tricyclazole (@ 0.045%), carbendazim (@ 0.05%), bitertanol (@ 0.025%), propiconazole (@ 0.025%) and standard check carbendazim (WP @ 0.05%) were sprayed twice, first at booting stage and second at flowering. The results of three years revealed that all the chemicals proved effective in management of leaf as well as neck blast and increased the grain yield. Tricyclazole proved significantly superior in decreasing the leaf and neck blast by 62.9 and 64.1%, respectively, with corresponding increase of 72.3% in grain yield over control and as effective as recommended treatment of carbendazim 50 WP.