Aphids feed on host plants by penetrating the stems or leaves with stylets. The feeding behavior of aphids consists of probing, penetration, salivation, and sap ingestion. To assess the effects of sound on feeding behavior, we monitored the stylet activity of the green peach aphid, Myzus persicae (Sulzer), using electrical penetration graph (EPG). The use of EPG was critical for determining the stage, frequency, and duration of feeding in aphids. We played back three acoustic stimuli of sine waves with frequencies of 100, 1000, and 5000 Hz to adult aphids. In the sound treatment group, the frequencies of probing, penetration, and salivation increased, whereas the duration of sap ingestion decreased. The results of EPG revealed that the acoustic stimuli may restrict aphid feeding by inhibiting sap ingestion.

• Hyoyoung Jang(Division of EcoScience, Research Institute of Eco Science, Ewha Womans University)
• Amanda Wee Huixin(School of Life Science and Chemical Technology, Ngee Ann Polytechnic, Singapore)
• Sim Sze Ching Danielle(School of Life Science and Chemical Technology, Ngee Ann Polytechnic, Singapore)
• Yeo Qin Yi(School of Life Science and Chemical Technology, Ngee Ann Polytechnic, Singapore)
• Hyojoong Kim(Division of EcoScience, Research Institute of Eco Science, Ewha Womans University)
• Yikweon Jang(Division of EcoScience, Research Institute of Eco Science, Ewha Womans University)