PJB-2023-346
Investigation on the susceptibility of fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) to selected insecticides and Bt in India.
B. N. Balaji
Abstract
The Fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), was first reported from India in May 2018 on Maize. Since its invasion, it has spread to all maize-growing regions, but there is no information on its susceptibility to insecticides. In this study, we investigated baseline sensitivity to six insecticides against six field FAW populations collected from Karnataka by an artificial diet incorporation and surface coating method. All the populations were highly sensitive to emamectin benzoate (LC50 0.428 - 1.51ppm) followed by spinetoram (LC50 3.69 - 11.28ppm), chlorantraniliprole (LC50 16.94 - 39.42ppm) lambda-cyhalothrin (LC50 7.19 - 23.26ppm), azadirachtin (LC50 5.30-17.89ppm) and B. thuringiensis (LC50 39.0 - 117.27ppm). However, the emamectin benzoate was highly toxic to the larvae as compared to other insecticides. The resistance Ratio of insecticides was very low, indicating similar susceptibility across populations. A comparison analysis of Indian populations with the American population revealed that the Indian population registered higher LC50. The baseline data generated here will be useful in the future for monitoring the development of insecticide resistance.
To Cite this article:
Download
