Biological activities of cow excreta with neem seed kernel extract against Helicoverpa armigera (Hübner)

Laboratory studies were conducted to study the combined action of cow excreta with neem seed kernel extract (NSKE) on biological activities of Helicoverpa armigera. NSKE 5%+cow urine 5%+cow dung extract 5% treatment was found to be the best in exhibiting toxic effect on eggs and larvae of H. armigera. The larval growth index was also low in H. armigera fed with NSKE 5%+cow urine 5%+cow dung extract 5%, while high antioviposition and antifeedant index and low total developmental growth index, food intake and post ingestive utilization of treated pods by H. armigera were recorded in NSKE followed by NSKE + cow urine + cow dung.