Ahmad, T., Khan, R., Khattak, T.N., Ullah, I., Khan, A. and Khan, S. 2020. Comparative Efficacy of Bio-Pesticide and Synthetic Agrochemicals on Population Control of Aphids, Helicoverpa armigera, Infestation Control and Yield of Okra: Population Control of Aphids, Helicoverpa armigera. Biological Sciences - PJSIR. 63, 3 (Nov. 2020), 207–213. DOI:https://doi.org/10.52763/PJSIR.BIOL.SCI.63.3.2020.207.213.