Efficacy of sub lethal concentration of flubendiamide against larvae of Spodoptera litura (Fab.) (Lepidoptera: Noctuidae)

Abstract

The sub lethal effects of flubendiamide (39.35% SC) were studied against the 5th instar larvae of Spodoptera litura under the laboratory condition. The different sub lethal concentrations used were 0.002%, 0.004%, 0.006%, and 0.008%. A significant increase in the larval mortality was observed as compared to the control with increase of sub lethal concentration of flubendiamide. Highest larval mortality of 47.33% was observed at 0.008% concentration. Longevity of both the larvae (5th and 6th) and adults increases significantly with increase in sub lethal concentration. A significant decrease in the fecundity and fertility were observed with increase in the sub lethal concentration flubendiamide as compared to the control. The inhibition of adults emergence was also observed with increase in the sub lethal concentration. Hence from this study, it was concluded that flubendiamide is highly effective insecticide at its sub lethal concentrations against the 5th instar larvae of Spodoptera litura under laboratory condition.