Field evaluation of fungicides against pod blight complex disease of soybean Glycine max (L.) Merrill

Abstract

Experiment on soybean (Glycine max L. Merrill) were carried out aiming to control pod blight caused by fungus, Colletotrichum truncatum (Schew.) Andus and Moore, Colletotrichum gloeosporoides (Penz.) Penz. and Sac. and Rhizoctonia bataticola (Taub.) Butler with seven treatments represented by different seed treatments and fungicidal sprays against disease. Whereas, control receiving no spray with three replications of each under field conditions during two consecutive years from 2016 to 2017. In 2016, the least Per cent Disease Index (PDI), per cent pod infection and increase in yield were estimated in plot treated with seed treatment with Carboxin 37.5% + Thiram 37.5% (Vitavax Power) @ 2 g/Kg of seed + Foliar Spray with Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75WG) (0.7 g/l) followed by seed treatment with Mancozeb 50% + Carbendazim 25% (Sprint 75 WP) at 2 g/Kg of seed + Spray with Carbendazim 12% + Mancozeb 63% (SAAF 75 WP) fungicides. The mean Pod Disease Index (PDI) was highest in plots treated with Seed treatment with Carboxin 37.5% + Thiram 37.5% (Vitavax Power) @ 2 g/Kg of seed + Foliar Spray with Hexaconazole 5 EC (0.1%) followed by Seed treatment with Carboxin 37.5% + Thiram 37.5% (Vitavax Power) @ 2 g/Kg of seed + Foliar Spray with Propiconazole 25 EC (0.1%). Almost similar trends of disease control were observed in 2017. The treatment with Carboxin 37.5% + Thiram 37.5% (Vitavax Power) @ 2 g/Kg of seed + Foliar Spray with Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75WG) (0.7 g/l) recorded least per cent disease Index, per cent pod infection and better yield productions against pod blight disease in soybean.