Patil RK, Halappa B and Guru PN*
Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad, Karnataka, India
*Corresponding Author: Guru PN, Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad, Karnataka, India.
Received: December 22, 2017; Published: January 11, 2018
Citation: Guru PN., et al. “Screening of New Bt Cotton Hybrids against Sucking Pests”. Acta Scientific Agriculture 2.1 (2018).
A field experiment was conducted during kharif-2012 to study the reaction of different Bt cotton hybrids against sucking pests and their natural enemy population. Among the different hybrids tested Bio HY. 15-2 recorded the least incidence of leafhoppers (2.96 per 3 leaves) and aphids (1.20 per 3 leaves), BIO GHY 60-2 BGII recorded least population of thrips (4.64 per 3 leaves) and in KDCHH 553 BGII population of whitefly (0.37 per 3 leaves) was recorded lowest and founds best. Although per cent good opened bolls not differed significantly across the tested hybrids, KDCHH 6741 BGII (29.91%) recorded the highest bad opened boll percentage and found susceptible. With respect to population of coccinellids and green lace wings not differed significantly across the hybrids tested while the population of spiders recorded highest in BIO GHY 60-2 BGII (2.19 per plant) and least in Ankur yesh BGII (0.28 per plant). However, Ankur suvarna BGII (1833 kg/ha), KDCHH 553 BGII, 72SS 66 BGII and Ankur 4252 BGII (1750 kg/ha respectively) recorded the respective higher yield with all the constraints.
Keywords: Screening; Bt Cotton Hybrids; Sucking Pests; Natural Enemies
Copyright: © 2018 Guru PN., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.