Bio-efficacy of combination fungicide Prochloraz 27% + tricyclazole 23% SE for the management of blast disease of rice

Abstract

Rice blast caused by Magnaporthe oryzae is the major threat to rice production worldwide. Many chemicals were evaluated to manage the disease but are found costly and less effective over time. To find the cost-effective and efficient fungicide, we have evaluated the Prochloraz 27% + Tricyclazole 23% SE, Tricyclazole 75% WP, Carbendazim 50% WP, and Carbendazim 12% + Mancozeb 63% at different concentration during Rabi and Kharif 2016 under field conditions. The study revealed that the three successive sprays of Prochloraz 27% + Tricyclazole 23% SE at 1250 ml/ha atten days interval from the initiation of disease was found most effective in reducing the disease up to 98.24% and 97.13% in Rabi and Kharif seasons respectively. Although, higher yield was observed with the application of Prochloraz 27% + Tricyclazole 23% at 1000 ml/ha in both the seasons, however, 1000 ml/ha spray concentration was found economic (1: 2.74) followed by the same chemical at 1250 ml/ ha (1: 2.65).