Management cotton whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) Mehra Swati*, Rolania Krishna, Rathee Mandeep Department of Entomology, CCS Haryana Agricultural University, Hisar, 125 004 *Email: swatimehra7191@gmail.com
Online published on 23 October, 2018. Abstract Schedules incorporated with biorationals and insecticides were evaluated against whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) on Bt cotton hybrid. Four sprays of nimbecidine 300 ppm @ 5ml/l at 10 days interval gave highest benefit cost ratio (0.86). First spray of nimbecidine 300 ppm @ 5ml/l followed by dimethoate 30 EC @ 1.5 ml/l, triazophos 40 EC @ 3 ml/l, novaluron 10 EC @ 1ml/l, nimbecidine 300 ppm @ 5ml/l and trizophos 40 EC @ 3 ml/l at 5 days interval proved the most effective. Maximum yield (20.66 q/ha) was obtained with six sprays of nimbecidine 300 ppm @ 5ml/l at 5 days interval along with yellow sticky traps installed @ 125 Nos/ha. This was observed to be at par with four sprays of nimbecidine at 10 days interval (20.53 q/ha). Top Keywords Bt cotton, whitefly, yellow sticky traps, nimbecidine, benefit cost ratio, yields, dimethoate, trizophos, novaluron. Top |