effect on parasitism. The Rag2 resistance allele did not affect proportion
of male progeny (Fig. 1b; Table 2c), but did decrease the
size of female progeny, although the effect size was only one-third
that of the Rag1 resistance allele (Fig. 1c; Table 2d and e). The resistance
alleles did not affect the number of aphids approached,
stung, or fed upon (Table 4a–c), nor did resistance alleles affect
the numbers of aphids in which A. certus oviposited (Table 4d;
Fig 1a). The egg load of A. certus females at the start of the behavioral
observations was 14.2 ± 0.8, and females laid 2.8 ± 0.3 eggs
during the 25 min exposure period. At this rate, females would
exhaust their egg load in less than 3 h.