Studies on efficacy of SLNPV with plant extracts in the management of Spodoptera litura (Fabricius) on cabbage

Abstract

Results on evaluation of SLNPV at 250 LE per ha in combination with different plant extracts under field condition against Spodoptera litura (Fab.) on cabbage indicated that highest per cent (81.66%) larval reduction was recorded in the SLNPV+NSKE-5% followed by SLNPV+neem oil-0.1% (73.33%). The other botanicals like mustard oil-0.2%, chilli garlic extract- 2.5%, Calatropis leaf extract-2% and Pongamia leaf extract-2% along with SLNPV recorded 62.78, 60.26, 55.38 and 53.75 per cent larval reduction, respectively over control (5.53%), after first spray. Least per cent larval reduction was observed in sole treatment of SLNPV with 45.60%. The same trend was observed after second spray. The addition of NSKE-5% or neem oil-0.1% with SLNPV spray solution showed additive effect and also avoided deterioration of NPV in the sun light and helps in bringing more reduction in the larval population of S.litura immidietly after each spray