Evaluation of different management approaches against pod borer, helicoverpa armigera (hubner) in chickpea

Abstract

Abstract : An experiment was conducted to evaluate various management approaches for the management of the pod borer, Helicoverpa armigera (Hubner) in chickpea at Regional Agricultural Research Station, Ishurdi, Pabna during 2005-06. All the management approaches were found superior over the farmer’s practice both in terms of protection and production. Out of 11 approaches, T5 consisting of first spray with Helicoverpa nuclear polyhedrosis viruses (HNPV) @ 500 Larval equivalent/ha at 100% pod formation stage and second spray after seven days intervals with cypermethrin 10 EC @ 1 ml/1 of water gave the best protection in terms of the lowest pod borer damage (4.62%) and provided the highest yield (2096 kg/ha) with BCR of 5.05 followed by only HNPV spray.. Recommended practice significantly reduced pod borer damage than the farmer’s practice. The pod borer damage reduction by different management approaches ranged from 15.25% to 81.26% compared to farmer’s practice with BARIchola-5. The most economic approach for pod borer management was chickpea intercropped with mustard sown on November 15. But to get best protection against the pod borer, the most effective management approach was first spray with HNPV @ 500 LE/ha and second spray after 7 days intervals with cypermethrin 10 EC @ lmi/1 water.