Figure 1. Symptoms on cotyledons of B. napus cv. Westar infected with L. maculans ‘brassicae’ or L. biglobosa ‘canadensis’.
B. napus cv. Westar cotyledons were wounded and inoculated with Lmb or Lbc spores and disease allowed to progress for 17 days post inoculation (dpi). Cotyledons were harvested and photographed at 3, 5, 7, 10, 14, and 17 dpi to track lesion development by the two pathogens.