Survival and Development of Helicoverpa armigera (Hubner) on Public Sector Bt Cotton Hybrids Thakre B A1,*, Bhamare V K1 1Department of Agricultural Entomology, College of Agriculture, Latur413512, Maharashtra, India *Email: tbhushan50@gmail.com (corresponding author): ORCID ID 0000-0002-1735-0248
Online Published on 18 October, 2023. Abstract Laboratory experiment was conducted to find out the survival and development of Helicoverpa armigera (Hubner) on public sector Bt cotton hybrids (NHH-44 BG II, PKV Hy-2 BG II, PDKV-JKAL-116 BG II, G. COT-10 Hy. BG II and G. COT-08 Hy. BG II). Instarwise observations were documented on leaves, squares, young bolls and mature bolls at 60-80, 90-110, 120-140 and 150-170 days old crop, respectively. The results revealed that the early instars of H. armigera exhibited higher larval mortality than the later instars. The surviving larvae revealed adverse effect on many parameters viz., larval and pupal weight, % pupation and adult emergence indicating low growth and survival indices. Top Keywords Helicoverpa armigera, Bt cotton, Hybrids, Adult emergence, Diet, Bioassay, Larval weight, Pupal weight, Pupation, Emergence, Growth, Development. Top |