Insect olfactory system can recognize odorants for feeding, courtship, oviposition, and avoiding natural enemies. Odorant cues from host plants play important roles in the insect behaviours. The main cultivated host of the oligophage oriental tobacco budworm Helicoverpa assulta is
Aphids (Hemiptera: Aphididae) cause significant damage and transmit viruses to various crop plants. We aimed to evaluate how the infectious status of aphids influences their interaction with potential hosts. Two aphid (Myzus persicae and Rhopalosiphum padi) and plant (Nicotiana