Ground Cover Supplement : GC Supplement - Foliar fungal diseases of pulses
7 Canola GRDC Research Code UM00051 More information: Dr Steve Marcroft, Marcroft Grains Pathology, 03 5381 2294, email@example.com; Professor Barbara Howlett, University of Melbourne, 03 8344 5062, b.howlett@ unimelb.edu.au This research is undertaken as part of the National Canola Pathology Program led by Professor Barbara Howlett. Cut a plant at the crown to assess internal infection. PHOTO: STEVE MARCROFT TA BLE 2 Crop blackleg severity. High risk Medium risk Low risk Yield loss occurs when more than half of the cross-section is discoloured. Cankered 60% 100% 40% 80% 0% 20% TA BLE 1 Regional blackleg factors. Environmental factors that determine risk of severe blackleg infection Blackleg severity risk factor High risk Medium risk Low risk Regional canola intensity (% area sown to canola) above 20 16–20 15 11–14 11–14 10 6–9 5 below 5 Annual rainfall (mm) above 600 551–600 501–550 451–500 401-450 351–400 301–350 251–300 below 250 Total rainfall received March–May prior to sowing (mm) above 100 above 100 above 100 above 100 91–100 81–90 71–80 61–70 below 60 Combined high canola intensity and adequate rainfall increase the probability of severe blackleg infection.
GC Supplement - Profitable pulses and pastures
GC Supplement - Soil constraints