Evaluation of fungicides for the management of false smut of paddy

Abstract

Rice. (Oryza sativa L.) Is the most extensively cultivated food crop of the Asia and forms a major part of nourishment for half of the world’s population. An experiment was conducted during Kharif 2013 and 2014 to know the impact of three chemical sprays were given for different stages of the crop at Booting stage, 50% flowering stage and 100% flowering stage included the ten treatments. Among ten treatments, a spray of Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75 WG) @ 0.4gm/lt at 100% panicle emergence was highly effective in the management of false smut disease with least pooled data of infected spikelets/panicles (4.45%), which was followed by Kresoxim methyl (Ergon 44.3 SC) @ 1ml/lt at 100% panicle emergence (5.84%) respectively. In terms of Infected panicles/sq mt, the treatment with a spray of Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75 WG) @ 0.4gm/lt at 100% panicle emergence was highly effective in the management of false smut disease with least pooled data of infected panicles/sqmt (2.63%), which was followed by Kresoxim methyl (Ergon 44.3 SC) @ 1ml/lt at 100% panicle emergence (3.88%) respectively, the grain yield obtained from each plot it was found that a spray of Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75 WG) @ 0.4gm/lt at 100% panicle emergence gave the highest grain yield of 5077.08 kg/ha which was followed by the Kresoxim methyl (Ergon 44.3 SC) @ 1ml/lt at 100% panicle emergence (4943.75 kg/ha). However, when cost benefit ratio was calculated, Propiconazole 25EC (Tilt) @ 1ml/lt at 100% panicle emergence (27.07) and Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75 WG) @ 0.4gm/lt at 100% panicle emergence(20.16) respectively.