www.usask.ca
Fungicide application at flowering provides
effective control of stripe rust in wheat in
western Canada.
2nd ...
www.usask.ca
www.usask.ca
Stripe rust on winter wheat
Stripe rust pustules on seedling winter wheat leaf,
October 2010, Saskatchewan
www.usask.ca
Saskatchewan stripe rust survey 2013
Saskatoon
Regina
Prince Albert
Severe (infected leaf area 40 - 90%)
Mode...
www.usask.ca
Stripe rust
• In 2011, yield losses in
western Canada on:
S varieties: up to 35%,
I varieties: up to 20%
R va...
www.usask.ca
• Not necessary if growing a
resistant cultivar
• Goal is to protect the flag and
penultimate leaves
• Applic...
www.usask.ca
• Varieties
- AC Barrie: (S)
- CDC Imagine: Yr18 (MR)
- Lillian: Yr18 & Yr36 (R)
• Fungicide
- tebuconzole (F...
www.usask.ca
Fungicide and variety experiments
• Two seeding dates:
early (mid-May), and
late (early June)
• Three locatio...
www.usask.ca
Saskatoon 2012 early seed date – stripe rust severity
0
10
20
30
40
50
60
70
80
Unsprayed Stem
elongation
50%...
www.usask.ca
Saskatoon 2012 late seeding date – stripe rust severity
0
10
20
30
40
50
60
70
80
Unsprayed Stem
elongation
5...
www.usask.ca
2000
2500
3000
3500
4000
4500
Unsprayed Stem elongation 50% anthesis Early milk Fungicide at all
stages
Yield...
www.usask.ca
2000
2500
3000
3500
4000
4500
Unsprayed Stem elongation 50% anthesis Early milk Fungicide at all stages
Yield...
www.usask.ca
ns
www.usask.ca
Yield
benefit (%) 25 38* 12 40*
www.usask.ca
www.usask.ca
Yield
benefit (%) 46 36 27 40
www.usask.ca
www.usask.ca
Preliminary conclusions:
• Under the conditions of this study,
stripe rust was not observed on a highly
resis...
www.usask.ca
Preliminary conclusions:
• generally the best control was achieved when
fungicide was applied during flowerin...
www.usask.ca
Acknowledgements
• Jess Taylor, Tatiana Vera, Tim Dament and Jill
Woytowich for technical support, and
• To t...
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  1. 1. www.usask.ca Fungicide application at flowering provides effective control of stripe rust in wheat in western Canada. 2nd International Wheat Stripe Rust Symposium, Izmir, Turkey, 2014 Hadley Kutcher and Jianfeng Liu Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
  2. 2. www.usask.ca
  3. 3. www.usask.ca Stripe rust on winter wheat Stripe rust pustules on seedling winter wheat leaf, October 2010, Saskatchewan
  4. 4. www.usask.ca Saskatchewan stripe rust survey 2013 Saskatoon Regina Prince Albert Severe (infected leaf area 40 - 90%) Moderate (10 - 20%) Light (4 - 9%) Trace (1-3%) No stripe rust found
  5. 5. www.usask.ca Stripe rust • In 2011, yield losses in western Canada on: S varieties: up to 35%, I varieties: up to 20% R varieties: up to 10% R varieties - Lillian; many durum varieties
  6. 6. www.usask.ca • Not necessary if growing a resistant cultivar • Goal is to protect the flag and penultimate leaves • Application timing is unknown • Very high rate of disease increase under ideal conditions Foliar fungicide to control stripe rust of wheat
  7. 7. www.usask.ca • Varieties - AC Barrie: (S) - CDC Imagine: Yr18 (MR) - Lillian: Yr18 & Yr36 (R) • Fungicide - tebuconzole (Folicur®) 1) unsprayed check 2) stem elongation 3) 50% anthesis 4) early milk 5) all three stages Fungicide and variety experiments
  8. 8. www.usask.ca Fungicide and variety experiments • Two seeding dates: early (mid-May), and late (early June) • Three locations over 3 years
  9. 9. www.usask.ca Saskatoon 2012 early seed date – stripe rust severity 0 10 20 30 40 50 60 70 80 Unsprayed Stem elongation 50% Anthesis Early milk Fungicide at all stages Striperustseverity% AC Barrie CDC Imagine Lillian
  10. 10. www.usask.ca Saskatoon 2012 late seeding date – stripe rust severity 0 10 20 30 40 50 60 70 80 Unsprayed Stem elongation 50% anthesis Early milk Fungicide at all stages Striperustseverity(%) AC Barrie CDC Imagine Lillian
  11. 11. www.usask.ca 2000 2500 3000 3500 4000 4500 Unsprayed Stem elongation 50% anthesis Early milk Fungicide at all stages Yield(kg/ha) 2012 early seeding – yield of the susceptible cv. AC Barrie Yield benefit (%) 10.4 8.3 12.6
  12. 12. www.usask.ca 2000 2500 3000 3500 4000 4500 Unsprayed Stem elongation 50% anthesis Early milk Fungicide at all stages Yield(kg/ha) 2012 early seeding – yield of MR cv. CDC Imagine (Yr18) Yield benefit (%) 4.5 8.4 8.8 6.9
  13. 13. www.usask.ca ns
  14. 14. www.usask.ca Yield benefit (%) 25 38* 12 40*
  15. 15. www.usask.ca
  16. 16. www.usask.ca Yield benefit (%) 46 36 27 40
  17. 17. www.usask.ca
  18. 18. www.usask.ca Preliminary conclusions: • Under the conditions of this study, stripe rust was not observed on a highly resistant variety (Yr18 + Yr36), and yield loss was minimal on an MR variety (Yr18), • fungicide is effective on susceptible cultivars, but time of application is very important, and this will vary with environment and seeding date,
  19. 19. www.usask.ca Preliminary conclusions: • generally the best control was achieved when fungicide was applied during flowering, • a single well-timed fungicide application was equally effective to control stripe rust and improve yield as three applications, and • yield benefits of fungicide application were as much as 46% on a stripe rust susceptible variety.
  20. 20. www.usask.ca Acknowledgements • Jess Taylor, Tatiana Vera, Tim Dament and Jill Woytowich for technical support, and • To the funders of this project:

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