~ 2299 ~ International Journal of Chemical Studies 2019; 7(6): 2299-2303 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2019; 7(6): 2299-2303 © 2019 IJCS Received: 13-09-2019 Accepted: 15-10-2019 DS Sunil Kumar Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka, India MSL Rao Prof. Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka, India Shamarao Jahagirdar Prof. Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka, India KN Vijaykumar Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka, India Corresponding Author: DS Sunil Kumar Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka, India Field evaluation of fungicides against pod blight complex disease of soybean Glycine max (L.) Merrill DS Sunil Kumar, MSL Rao, Shamarao Jahagirdar and KN Vijaykumar 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. Keywords: Soybean, pod blight, fungicide, per cent disease index (PDI) Introduction Soybean [Glycine max (L.) Merill] is a species of legume native to East Asia. The plant is classed as an oilseed rather than a pulse. The genus Glycine is wild and divided into two subgenera, Glycine and Soja. It is cultivated over an area of 0.27 million hectare with a production of 0.17 million tonnes and productivity of about 639 kg/ha in Karnataka (Directors report, 2018) [1] . The state productivity (639 kg/ha) and national productivity (803 kg/ha) are low in comparison with world average (2735 kg/ha). The major soybean growing states in the country are Madhya Pradesh, Maharashtra, Karnataka, Andhra Pradesh, etc. Soybean is a major oilseed and pulse crop and its plant parts easily succumb to different biotic stresses. Among them major constrains for soybean cultivation is the pod blight disease. Even though many seed and soil borne diseases do occur in the crop, pod blight has more important due to severe crop losses. Pod blight is a complex disease in which more than one pathogens are involved and also nature of damage and symptoms are decided by pathogens association. The disease is usually caused by fungal spp. Among the fungal diseases infecting soybean crop, pod blight complex disease caused by Colletotrichum truncatum, Colletotrichum gloeosporoides and Rhizoctonia bataticola is one of the most important and destructive disease causing lower production and productivity and higher yield losses in soybean., has been reported as the major constraint in the successful cultivation of soybean (Khan and Backman, 1989 and Sinclair, 1974) [7, 8] . Material Methods Field experiment was conducted during crop season of the year 2016-2017 at Ugar Research and Development Unit, Ugarkhurdh, Belagavi. The efficacy of fungicides by seed treatment and foliar spray and alone against the pathogen were tested in field during 2016 and 17.