Fig. 1

Detached leaf inoculation of twelve Phytophthora species. A, and E, show lesion area (%) on Rhododendron cv. catawbiense ‘Boursault’ in experiments 1 and 2, respectively. B and F show sporulation (sporangia/mm²) on Rhododendron cv. catawbiense ‘Boursault’ in experiments 1 and 2, respectively. C, and G, show lesion area (%) on Rhododendron cv. ‘Lee’s dark purple’ in experiments 1 and 2, respectively. D and H show sporulation (sporangia/mm²) on Rhododendron cv. ‘Lee’s dark purple’ in experiments 1 and 2, respectively. Lower case letters in each panel represent statistically significant differences among Phytophthora spp. within each cultivar based on Tukey’s test at the 95% confidence level carried out on square root transformed data. The data presented are not transformed. Bars show standard deviation from the mean of replicates (based on non-transformed data)