The Coffee Bean & Tea Leaf(CBTL), Business strategy case study
Kutcher stripe rust_symposium_izmir_28.04.
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
3. www.usask.ca
Stripe rust on winter wheat
Stripe rust pustules on seedling winter wheat leaf,
October 2010, Saskatchewan
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. 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. 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. 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. www.usask.ca
Fungicide and variety experiments
• Two seeding dates:
early (mid-May), and
late (early June)
• Three locations
over 3 years
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. 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
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. 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.
