Improving stem canker control in winter oilseed rape by accurate timing of fungicide applications based on disease forecasting

This three year project focused on improving strategies for control of canker (Leptosphaeria maculans) in winter oilseed rape. There were three main objectives, which were addressed using historical data and field experiments: a) to quantify yield losses in relation to the development of phoma leaf spot and the severity of stem canker epidemics, b) to identify factors affecting ascospore discharge and hence phoma leaf spot attacks and c) to optimise fungicide timing for stem canker control and yield response