Effect of Different Spacing of Bt and Non Bt Cotton Hybrid on Population of P. gossypiella under High Density Planting

A field experiment was conducted at Experimental farm of Department of Entomology, Dr. PDKV, Akola, on evaluation of various cotton cultivars against sucking pests under high density planting during kharif 2013 in Factorial Randomized Block Design with three replications. It is evaluated from the study that the higher population of P. gossypiella was harboured on Bt and non Bt cotton hybrid. The population of P. gossypiella larvae was in PKV Hy-2 and RCH-2 BGII was ranging from 0.25 to 1.28 and 0.05 to 0.11, respectively. The lowest mean population of P. gossypiella larvae (0.40) was observed in plant spacing of cotton 120 x 45 cm followed by plant spacing of 90 x 45 cm.