Experimental aphid clones classified by source crop plant, aphid color morph and screened symbiotic bacteria.

Clone IDs are unique numbers from field samples followed by letters: first capital letter (A or C) is for alfalfa or clover crop; lowercase letter (g or p) is for green or pink; last letter is for aphid symbiont, T for Hamiltonella defensa, U for Regiella insecticola, or 0 for none of the symbionts tested for (see text for details). In Figure 1, wasp x clone interactions are identified as e.g. interaction ‘Aw_52Ag0’ where an ‘Aw’ A. ervi wasp interacts with individuals (n = 6) of the clone ‘52Ag0’.