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Efficacy of Bio-Insecticides and Synthetic Insecticides on the Control of Helicoverpa Armigera Insect on Tomato Crop: Helicoverpa Armigera Insect on Tomato Crop. Pakistan Journal of Scientific & Industrial Research 2020, 63 (1), 17-21. https://doi.org/10.52763/PJSIR.BIOL.SCI.63.1.2020.17.21.