Comparative efficacy of different cotton hybrids containing Bt genes against Pectinophora gossypiella (Saunders)

SHRILAKSHMI R G; UDIKERI S S

doi:10.61475/JFS.2023.v36i3.04

SHRILAKSHMI R G Department of Agricultural Entomology, College of Agriculture University of Agriculture Sciences, Dharwad - 580 005, India
UDIKERI S S Department of Agricultural Entomology, College of Agriculture University of Agriculture Sciences, Dharwad - 580 005, India

DOI: https://doi.org/10.61475/JFS.2023.v36i3.04

Keywords: Bollworm,Cotton hybrids, Genotype, Pectinophora gossypiella

Abstract

Field experiment was conducted at Agricultural Research Station, Dharwad farm, during 2018 and 2019 to
evaluate performance of eighteen different cotton genotypes representing four different Bt events. Damage due to pink boll
worm (PBW) was least in intraspecific (H×H) hybrids compared to interspecific hybrids (H×B) hybrids. Cotton hybrid
Everest recorded least flower damage of 9.40 per cent, followed by Jadoo (9.71%) and were on par. The highest per cent
flower damage of 22.57 was registered in (H × H) non Bt hybrid DCH-32. Least boll damage of 13.93 per cent was recorded
in Everest BG-II and was on par with Jadoo (14.94%) and highest per cent boll damage of 41.26 was recorded in DCH-32
The seed cotton yield was highest in Everest BG-II (15.20 q/ha). Among BG-I genotypes, VCH-5 (Event-1) recorded
highest yield (9.84 q/ha) and the least yield was recorded in DCH-32(5.97 q/ha).