Department of Entomology, CCS Haryana Agricultural University, Hisar - 125 004, Haryana, India.
*Corresponding author's address: Department of Entomology, CCS Haryana Agricultural University, Hisar, Haryana - 125 004, India; E-mail: ramjood@rediffmail.com; ramsjood@hau.ernet.in
Eleven genotypes including five Bt (Ankur 2534 Bt, Ankur 651 Bt, RCH 134 Bt, RCH 317 Bt and MRC 6304 Bt) and their corresponding non-Bt hybrids with one local hybrid HHH-223 of cotton were evaluated against Spodoptera litura (Fabricius) for various biological parameters (larval period, larval weight, larval survival, pupal period, pupal weight and adult emergence). The various biological parameters of S. litura larvae from first instar onwards were studied on leaves at an interval of 80, 120 and 140 days of crop age. There was no significant difference between Bt and non-Bt hybrids.
