Table 1. Logistic regressions on the probability of attack by Oreina leaf beetles and infection by the rust U. cacaliae.

Source	DF	Deviance	Resid. DF	Resid. Dev.	P (Chi)
leaf beetle
null			159	184.21
population	1	2.076	158	182.13	0.150
treatment	6	16.404	152	165.73	0.012
pop*treatment	6	3.926	146	161.80	0.687
rust
null			159	213.64
population	1	12.960	158	200.68	<0.001
treatment	6	48.048	152	160.63	<0.001
pop*treatment	6	8.985	146	151.64	0.174