Bacterial and fungal disease management research on pulse crops in Southern Alberta.

1. Bacterial and fungal disease management research on pulse crops in Southern Alberta. M.W. Harding, R.J. Howard, D.A. Burke and M.J. Unruh, Pulse Science Cluster – Annual General Meeting Saskatoon, SK – November 17-18, 2011

2. Objectives • Assessment of multiple management tools • genetic potential for disease control, • chemical potential for disease control • benefits of integrating multiple tools for control of white mould and bacterial blights. • Assess efficacy of experimental chemicals, and novel tank mix combination for management of white mould and bacterial blights.

3. Sclerotinia White Mold White mold disease on bean caused by Sclerotiniasclerotiorum

4. Sclerotinia White Mold • Management of white mold on bean • Broad host range • Soil-borne fungus, sclerotia long-lived in soil • Infections well below crop canopy • No highly effective host resistance • Curative fungicides (vinclozolin) phased out • Timing of protective fungicides (boscalid, fluazinam, etc) is often difficult ALTERNATIVES??

5. Varietal Tolerances to White Mold A CD BCD D

6. Fungicide Efficacy and Novel Treatments A ABC AB AB CD D

7. Fungicide Tank Mix A AB BC

8. Bacterial Blights Common and halo blights caused by Xanthomonasaxonopodispv. phaseoliand Pseudomonas syringaepv. phaseolicola

9. Bacterial Blights • Seed-borne • Rain splash and wind driven particles • One contaminated seed in 16,000 can lead to severe outbreak of disease • Can reduce photosynthetic potential and yield • Managed primarily by disease-free seed and bactericidal seed treatments (streptomycin and copper) • Alternatives???

10. Disease Incidence (%) A B B B No treatment Oxysilver Streptomycin Copper Compound Sulphate Hydroxide

11. Integrating Multiple Tools Disease Incidence (%) abc abcd abcd cd d

12. Dry Bean Disease Surveillance • Activity 13: Determine the incidence and severity of infectious and non-infectious diseases on dry beans over two growing seasons(Dr. Ron Howard, ARD) • 2010: Alberta & Saskatchewan • 2011: Alberta & Manitoba • 2012: Saskatchewan & Manitoba • Activity 13: Determine the incidence and severity of infectious and non-infectious diseases on dry beans over two growing seasons (Dr. Ron Howard, ARD) • 2010: Alberta & Saskatchewan • 2011: Alberta & Manitoba • 2012: Saskatchewan & Manitoba

13. 2011 – Survey Results • Alberta: 28 fields in three counties • Manitoba: 28 fields in four municipalities • Incidence and severity of: bacterial blights, white mold, root diseases.

14. Conclusions • Demonstration of: • efficacy of experimental fungicides • novel tank mix combinations • Additive effects of integrating multiple tools • New seed treatment for control of seed-borne bacteria and fungi on pulse seed • Disease Surveillance in commercial dry bean fields in AB, SK, MB for bacterial blights, white mold and root diseases

15. Acknowledgements • Collaborators • Innovotech staff at Brooks and Edmonton, AB • Alberta Agriculture staff at CDCS – Brooks, AB • Viterra’s Alberta Bean Division • AAFC-Vauxhall Substation • Funding & Support • CAAP & Pulse Science Cluster • Innovotech Inc. & ARD • Viterra’s Alberta Bean Division • OmexAgriculture Inc. • Heads Up Plant Protectants