Evaluation of some ipm modules against Helicoverpa Armigera on chickpea
2000
Singh, Vikram | Mathur, N.M. | Kalyan, R.K. | Hussain, Akhther | Sharma, G.K. (Rajsthan Agricultural University, Jaipur (India). Agricultural Research Station)
The bioefficacy of five IPM modles was evaluated for the management of Helicoverpa armigera (Hub.) in chickpea during 1995-96, 1996-97 and 1997-98 under irrigated as well as, rainfed conditions. The IPM modules, excepting M4 and M5 consisted of three insecticide spray applications; module 4 and module 5 had two spray applications. All the IPM modules tested were found significantly superior over the untreated control, both in protection and prodution. Minimum pod damage and maximum grain yield was observed in module 1 (HaNPV, Btk and endosulfan) treatment, in both irrigated (3.4% 16.81 q/ha) and unirrigated (4.6%; 11.55 q/ha) conditions; untreated control had maximum pod damage (irrigated, 26.04%; unirrigated, 24.8%) and minimum pod yield (7.96 q/ha and 5.39 q/ha). Module 2, in which second spray of Btk of module 1 was replaced with nimbecidine, was second best in controlling H. armigera and gave maximum benefit-cost (B-C) ratio due to low cost of nimbecidine. The standard check (two sprays of endosulfan) was found more effective than module 3 (Ha NPV, nimbecidine and nimbecidine) and module 4 (two sprays of HaNPV + endosulfan) in crop protection and production.
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