Tavoosi Ajvad, F., Madadi, H., Gharali, B., Kazzazi, M. (2013) ‘Multiple predation effects of Episyrphus balteatus (Dip., Syrphidae) and Hippodamia variegata (Col., Coccinellidae) on Aphis gossypii  (Hem.: Aphididae) population’, IAU Entomological Research Journal, 5(1), pp. 51-59. doi: