F. Leland Russell, Svata M. Louda, Tatyana A. Rand, and Steven D. Kachman. 2007. Variation in herbivore-mediated indirect effects of an invasive plant on a native plant. Ecology 88:413–423.

Appendix H. Regressions of mean number of Rhinocyllus conicus egg cases per wavyleaf thistle flower head as a function of the number of bolting wavyleaf thistles within a 5-m radius of the sampled wavyleaf plant.

FIG. H1. Regressions of mean number of Rhinocyllus conicus egg cases per wavyleaf thistle flower head as a function of the number of bolting wavyleaf thistles within a 5-m radius of the sampled wavyleaf plant. Rhinocyllus conicus egg load per wavyleaf thistle flower head was not significantly related to number of bolting wavyleaf thistles within 5 m, nor was there a significant interaction between distance to the focal musk thistle patch and neighbor density on egg load per flower head. Regression equations are (1) at 30–50 m: egg load per head = 0.646 – 0.0007(number of bolting wavyleaf thistles), (2) at 80–100 m: egg load per head = 0.551 – 0.032(number of bolting wavyleaf thistles), and (3) at 200–220 m: egg load = 0.251 – 0.12(number of bolting wavyleaf thistles).