List of Articles multiple predator effects Open Access Article Abstract Page Full-Text 1 - Multiple predation effects of Episyrphus balteatus (Dip., Syrphidae) and Hippodamia variegata (Col., Coccinellidae) on Aphis gossypii (Hem.: Aphididae) population F. Tavoosi Ajvad H. Madadi B. Gharali M. Kazzazi