Effect of herbicide and disease resistance on survival and inoculum production of Leptosphaeria maculans, the causal agent of blackleg

Researcher:

Dr. S. Roger Rimmer, Agriculture and Agri-Food Canada, Dr. R. Kutcher, AAFC Melfort

Project Code:

CARP 9905

Final Report:

March 2002

Summary:

Leptosphaeria maculans, the cause of blackleg, causes significant yield loss in canola crops. In this study, researchers compared pathogen survival and inoculum production of infested residues in both blackleg resistant cultivars and blackleg susceptible herbicide tolerant cultivars. The results showed that ascospore release occurred from residues from both susceptible and resistant canola cultivars, and is not highly associated with the disease ratings observed at harvest.