Department of Plant Pathology, AICRP on Soybean, University of Agricultural Sciences, Dharwad-580 005, Karnataka, India
Field screening of new fungicide molecules against soybean rust and pod blight was done during kharif growing season 2014 and 2015 at Agricultural Research Station, Dharwad. Seven treatments were tested under natural epiphytotic conditions for rust and pod blight severity. The pooled analysis over two years revealed that among the treatments imposed, spraying with Trifloxystrobin+Tebuconazole 75WG @0.7g/L recorded minimum per cent disease index of 25.5 and 15.1 for rust and pod blight respectively followed by 32.6 and 18.1 PDI in case of Trifloxystrobin+Tebuconazole 75WG @0.6g/L against rust and pod blight respectively. The positive check Hexaconazole @ 1ml/L recorded disease severity of 29.1 and 26.8 respectively. The maximum severity was recorded in untreated control (78.50 PDI Rust and 40.9 PDI Pod blight). The reduction in PDI, increase in seed yield and B: C ratio was observed in above treatments. Thus, two sprays with Trifloxystrobin + Tebuconazole 75WG @0.7g/L be recommended in management of rust and pod blight diseases in northern Karnataka.
Soybean anthracnose, field management, new molecules, Colletotrichum truncatum, Phakospora pachyrhizi
