Waveform Comparisons Among AC and DC Electronic Monitoring Systems for Aphid (Homoptera: Aphididae) Feeding Behavior

Abstract

<i>Waveforms from AC and DC electronic monitoring systems were directly compared to determine which waveforms were equivalent to one another. Comparisons were facilitated by a device that allowed rapid switching from system to system while an aphid was producing a given waveform. Results revealed that potential drops occur in AC systems and that X waves occur in DC systems. For reasons presented, we propose that the term</i> stylet pathway phase <i>replace</i> salivation, <i>that</i> sieve element phase <i>replace</i> phloem ingestion, <i>and that</i> nonphloem phase <i>be used in AC systems instead of</i> nonphloem ingestion. <i>In general, the DC system could distinguish more details than could the AC systems we used.</i>