Effect of different active fungicides molecules on the management of rice blast disease

Evaluation of different fungicides against rice blast disease was carried out during Kharif 2008 and 2009, at State Adaptive Research Farm, Khirpai, Pachim Medinipur, West Bengal. A rice variety MTU 7029 was transplanted in Randomized Complete Block Design and the application of various fungicides viz Nativo 75WG, Gain 75 WP, Score 250 EC, Hexacon Super 5%SC, and Tilt 25 EC, were made with dose rates of 0.4 g l⁻¹ water, 0.6 g l⁻¹ water, 1.25 ml l⁻¹ water, 1.5 ml l⁻¹ water, 1 ml l⁻¹ water. All the fungicides proved to be effective in the management of rice blast disease but, Nativo, Gain and Score proved effective in all the three weeks in reducing the disease percentage more in 3^rd week with 10.15%, 12.85% and 11.46%. The control of disease in case of neck blast was shown by Score, Tilt and Nativo with 11.63%, 14.29% and 18.98% disease respectively. Tilt was proved the least effective in controlling leaf blast and Hexacone Super neck blast.