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

摘要

The effects of parasitization 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 parasitization increased. These changes are interpreted as a way aphids compensate for metabolic changes occurring during parasitization..