Results/Conclusions Adelgid density differed among groups and across time, and there was a significant group*time interaction. Although crawler densities in the resistant and control groups did not differ, settled adult densities were significantly lower in the resistant group than in the control. The steep decline in adelgid density between the crawler and adult phases in both the resistant and control groups is typical of this species, since even under ideal conditions only a small fraction of crawlers survive to adulthood. There were no within-group differences among sites in either the resistant or control groups. Western hemlock cuttings had very low rates of both adelgid settlement and survival; in contrast, cuttings from putatively-resistant trees had high adelgid settlement but very poor survival. This suggests that although resistant trees are poor hosts, adelgids cannot differentiate between them and control trees during the settlement process. Work is currently underway to assess the mechanistic basis of plant resistance in this interaction.