Seasonal incidence and management of onion thrips Thrips tabaci L. on marigold Ganai Suheel Ahmad*, Ahmad Hafeez, Kour Devinder Sharma Ramandeep, Norboo Thanlass, Khaliq Nadeya Division of Entomology, FoA, SKUAST-J, Chatha, Jammu, 180009, J&K *Email: suhail_jalib@yahoo.com
Online published on 23 October, 2018. Abstract Studies were conducted on the seasonal incidence of Thrips tabaci L. during 2014–15 at the University Research Farm, Sher-e-Kashmir University of Agricultural Sciences and Technology-Jammu. The incidence of T. tabaci was 0.68 thrips plant−1 in the 7th standard week and reached its maximum 3.49 thrips plant−1 in the 12th standard week. The mean maximum temperature (r = 0.721**) and minimum temperature (r = 0.768**) had positive but highly significant effect on thrips population. The mean relative humidity (morning) (r =-0.627*) and rainfall (r =-0.393*) had negative significant effect, while as mean relative humidity (evening) (r =-0.502) had negative effect. The evaluation of efficacy of insecticides against T. tabaci revealed that thiamethoxam 25EC (0.100%) was the most effective followed by imidacloprid 200SL (0.008%), methyl-o-demeton 25EC (0.030%), carbosulfan 250EC (0.003%), neem oil 5% (0.050%), novaluron 10EC (0.100%) and bifenthrin 10EC (0.050%). Top Keywords Marigold, Thrips tabaci, population dynamics, weather factors, correlation, insecticides, thiamethoxam, imidacloprid, methyl demeton, carbosulfan, neem oil, novaluron, bifenthrin. Top |