Population density of Aphis fabae Scopoli (Hemiptera, Aphididae) and its natural enemies in intercropping of faba bean (Vicia faba L.) and dragonhead (Dracocephalum moldavica L.) Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Solmaz Azimi, Rouhollah Amini Subject(s): Biological Sciences, Environmental Sciences, Biology