Insecticide Toxicology Laboratory Department of Entomology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar-263 145, Uttarakhand, India
*Corresponding author's E-mail: himanshumaimor@gmail.com
Online published on 23 January, 2020.
The effect of sub-lethal concentrations of flubendiamide and spinetoram on growth and development parameters was tested against 5d old larvae of Spodoptera litura (Fab.) by leaf smear method on soybean leaf disc. At 3 days after feeding (DAF), flubendiamide (0.009%) and spinetoram (0.01%) reduced the mean eight gain over control by 110.7 and 62.97% and caused 66.6 and 40% mortality, respectively. Pupation was zero at flubendiamide (0.009%) whereas in spinetoram (0.01%) it was 53.34%. In another experiment the effect of sub-lethal concentrations of spinosad was evaluated against 4d old larvae of S. litura by larval atomization method. At 4 days after treatment (DAT), spinosad (0.005%) caused 37.24% reduction in weight gain over control. The feeding inhibitory activity of flubendiamide, spinetoram and spinosad were determined against 6d old larvae of S. litura and 12d old larvae of Spilarctia obliqua (Wlk.) by leaf smear method on castor leaf disc. The order of deterrence against S. litura and S. obliqua was flubendiamide > spinetoram > spinosad at the higher concentration (0.01%) and at lower concentrations (0.002, 0.0002 and 0.00005%) the order was flubendiamide > spinosad > spinetoram.
Antifeedant activity, flubendiamide, spinetoram, Spodoptera litura, Spilarctia obliqua, sub-lethal effect, spinosad
