Increased xylem ingestion and decreased phloem ingestion in the aphid Acyrthosiphon pisum (Hemiptera: Aphididae) parasitised by Aphidius ervi (Hymenoptera: Braconidae)

• Main Authors: Claudio C. RAMÍREZ, Cristian A. VILLAGRA, Hermann M. NIEMEYER
• Format: Article
• Language: English
• Published: Institute of Entomology, Biology Centre, Czech Academy of Science 2006-01-01
• Series: European Journal of Entomology
• Subjects: acyrthosiphon pisum; aphidius ervi; parasitisation; feeding behaviour; xylem; phloem; ingestion
• Online Access: https://www.eje.cz/artkey/eje-200601-0032_Increased_xylem_ingestion_and_decreased_phloem_ingestion_in_the_aphid_Acyrthosiphon_pisum_Hemiptera_Aphididae.php

The effects of parasitisation by Aphidius ervi on the feeding behaviour of the aphid Acyrthosiphon pisum were studied. There was progressive increase in the time devoted to xylem ingestion (G waveform) and concomitant decrease in time devoted to phloem ingestion (E2 waveform) in parasitized relative to unparasitized aphids, as the time from parasitisation increased. These changes are interpreted as a way aphids compensate for metabolic changes occurring during parasitisation.