Electrical penetration graph (EPG) waveforms produced by potato psyllids of three haplotypes during salivation into phloem sieve elements (E1), and ingestion of phloem sap (E2).

<p>The waveforms are compared to characteristic EPG waveforms identified and described by Pearson et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0138946#pone.0138946.ref027" target="_blank">27</a>] for psyllids of the Central haplotype.