Indian Journal of Entomology

Open Access
SCOPUSWeb of Science
  • Year: 2018
  • Volume: 80
  • Issue: 4

Biology of Herpetogramma bipunctalis (Fabricius) with descriptions of larval chaetotaxy

Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, 641003

1Department of Seed Technology, Tamil Nadu Agricultural University, Coimbatore, 641003

Abstract

This study is on the biology of Herpetogramma bipunctalis (Fabricius) as observed on Solanum trilobatum, a new host record. These observations revealed that the egg, larval, and pupal periods were 3.75 ± 0.35, 17.22 ± 1.48 and 6.35 ± 0.70 days, respectively. The total life cycle (egg-to-adult) was 32.92 ± 5.27 days. Additionally, descriptions of larval chaetotaxy and morphology of the eggs, larvae and pupae are provided. Eggs circular to oblong, flattened, transparent, colourless and laid in groups, and measure 1.0045 ± 0.02 mm long and 0.796 ± 0.024 mm broad. Pupae stout and 9.14 ± 0.05 cm long. Larval chaetotaxy reveals that the subventral setae are trisetose in first abdominal segment; and D and SD pinacula of mesothorax fused, a characteristic feature of H bipunctalis.

Keywords

Psara bipunctalis, Solanum trilobatum, larval chaetotaxy, setal map, head, thorax, abdomen