Effects of (A) the density of Douglas fir in the direct neighbourhood of a focal Douglas fir and (B) of mean damage by C. pseudotsugae on the probability of a Douglas fir being infected by Nothophaeocryptopus gaeumannii, the causal agent of Swiss needle cast. Solid and dashed lines represent prediction and adjusted standard error of model 2 (Table 1). Dots at probability 0 and 1 represent Douglas fir that were (1) or were not (0) infected.