Abstract
Winter wheat production in Canada is approximately 5% of all the wheat seeded in Canada; however, it has important economic and agronomic benefits for growers. Stripe rust of wheat, caused by Puccinia striiformis f. sp. tritici Eriks. occurs across western Canada in many years; as a result, it is prudent to evaluate strategies to control stripe rust in winter wheat. The objective of this project was to evaluate the effects of fall and spring fungicide application (metconazole and pyraclostrobin) on stripe rust, as well as leaf spot severity, and impact on yield and quality of winter wheat (Triticum aestivum L.). The effect of fungicide application in the fall, in the spring, or both, on four winter wheat cultivars varying in resistance to these diseases was evaluated at 11 site-years in Alberta and Saskatchewan for four growing seasons from 2013 to 2017. Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high. Single spring and dual fungicide applications to ‘AC Bellatrix’ maintained yield potential by 16.9–229.5% compared to the unsprayed treatment. Grain quality was also maintained by the same treatments at some site-years. During the study, virulence of the natural Pst population on ‘Radiant’ with the Yr10 resistance gene was differentially expressed among sites and therefore yield response to fungicide varied. The stripe rust resistant cultivar ‘Moats’ did not benefit from fungicide application at any timing. Single fall fungicide application had no effect on disease severity of any of the cultivars at any site-years, although it had minor effects on yield or grain quality of ‘AC Bellatrix’ at a few site-years. Multiple fungicide applications, in fall and again in spring, did not offer additional benefits to a single spring application.
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Claims 14
Claim · model-written summary
Spring or dual fungicide application reduced Stripe rust severity in ‘AC Bellatrix’ when disease severity was high.
- Taxon
- winter wheat
Triticum aestivumt0 - Material
- ‘AC Bellatrix’e0
- Treatment
- single spring or dual (fall and spring) applicationse0
- Outcome
- Stripe rust severitye0
- Direction
- reducede0
- Qualifier
- when disease severity was highe0
- Comparator
- fall application alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e0“Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high.”
Claim · model-written summary
Spring or dual fungicide application reduced Stripe rust severity in ‘CDC Osprey’ when disease severity was high.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘CDC Osprey’e0
- Treatment
- single spring or dual (fall and spring) applicationse0
- Outcome
- Stripe rust severitye0
- Direction
- reducede0
- Qualifier
- when disease severity was highe0
- Comparator
- fall application alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e0“Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high.”
Claim · model-written summary
Spring or dual fungicide application reduced leaf spot severity in ‘AC Bellatrix’ when disease severity was high.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘AC Bellatrix’e0
- Treatment
- single spring or dual (fall and spring) applicationse0
- Outcome
- leaf spot severitye0
- Direction
- reducede0
- Qualifier
- when disease severity was highe0
- Comparator
- fall application alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e0“Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high.”
Claim · model-written summary
Spring or dual fungicide application reduced leaf spot severity in ‘CDC Osprey’ when disease severity was high.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘CDC Osprey’e0
- Treatment
- single spring or dual (fall and spring) applicationse0
- Outcome
- leaf spot severitye0
- Direction
- reducede0
- Qualifier
- when disease severity was highe0
- Comparator
- fall application alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e0“Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high.”
Claim · model-written summary
Spring or dual fungicide application reduced leaf spot severity in ‘Radiant’ when disease severity was high.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘Radiant’e0
- Treatment
- single spring or dual (fall and spring) applicationse0
- Outcome
- leaf spot severitye0
- Direction
- reducede0
- Qualifier
- when disease severity was highe0
- Comparator
- fall application alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e0“Stripe rust severity on the susceptible cultivars, ‘AC Bellatrix’ and ‘CDC Osprey’, and leaf spot severity on these cultivars and ‘Radiant’, was reduced by single spring or dual (fall and spring) applications, but not by fall application alone when disease severity was high.”
Claim · model-written summary
Spring and dual fungicide application maintained AC Bellatrix yield potential by 16.9–229.5% versus unsprayed treatment.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘AC Bellatrix’e1
- Treatment
- Single spring and dual fungicide applicationse1
- Outcome
- yield potentiale1
- Direction
- maintainede1
- Value
- 16.9–229.5%e1
- Comparator
- unsprayed treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e1“Single spring and dual fungicide applications to ‘AC Bellatrix’ maintained yield potential by 16.9–229.5% compared to the unsprayed treatment.”
Claim · model-written summary
Grain quality was maintained by spring and dual fungicide applications at some site-years.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘AC Bellatrix’e1
- Treatment
- Single spring and dual fungicide applicationse1
- Outcome
- Grain qualitye2
- Direction
- maintainede2
- Qualifier
- at some site-yearse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e1“Single spring and dual fungicide applications to ‘AC Bellatrix’ maintained yield potential by 16.9–229.5% compared to the unsprayed treatment.”
e2“Grain quality was also maintained by the same treatments at some site-years.”
Claim · model-written summary
Pst virulence on Radiant carrying Yr10 differed among sites.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘Radiant’e3
- Interactor
- Pste3pathogen
- Gene
- Yr10e3
- Outcome
- virulence of the natural Pst populatione3
- Direction
- differentially expressede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e3“virulence of the natural Pst population on ‘Radiant’ with the Yr10 resistance gene was differentially expressed among sites and therefore yield response to fungicide varied.”
Claim · model-written summary
Radiant yield response to fungicide varied among sites.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘Radiant’e3
- Interactor
- Pste3pathogen
- Gene
- Yr10e3
- Outcome
- yield response to fungicidee3
- Direction
- variede3
- Setting
- among sitese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e3“virulence of the natural Pst population on ‘Radiant’ with the Yr10 resistance gene was differentially expressed among sites and therefore yield response to fungicide varied.”
Claim · model-written summary
Moats did not benefit from fungicide application at any timing.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘Moats’e4
- Treatment
- fungicide application at any timinge4
- Outcome
- benefite4
- Direction
- did not benefite4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e4“The stripe rust resistant cultivar ‘Moats’ did not benefit from fungicide application at any timing.”
Claim · model-written summary
Fall fungicide application had no effect on disease severity across cultivars and site-years.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Single fall fungicide applicatione5
- Outcome
- disease severitye5
- Direction
- no effecte5
- Qualifier
- any of the cultivars at any site-yearse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e5“Single fall fungicide application had no effect on disease severity of any of the cultivars at any site-years, although it had minor effects on yield or grain quality of ‘AC Bellatrix’ at a few site-years.”
Claim · model-written summary
Fall fungicide had minor effects on yield of AC Bellatrix at a few site-years.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘AC Bellatrix’e5
- Treatment
- Single fall fungicide applicatione5
- Outcome
- yielde5
- Qualifier
- at a few site-yearse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e5“Single fall fungicide application had no effect on disease severity of any of the cultivars at any site-years, although it had minor effects on yield or grain quality of ‘AC Bellatrix’ at a few site-years.”
Claim · model-written summary
Fall fungicide had minor effects on grain quality of AC Bellatrix at a few site-years.
- Taxon
- winter wheatTriticum aestivumt0
- Material
- ‘AC Bellatrix’e5
- Treatment
- Single fall fungicide applicatione5
- Outcome
- grain qualitye5
- Qualifier
- at a few site-yearse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e5“Single fall fungicide application had no effect on disease severity of any of the cultivars at any site-years, although it had minor effects on yield or grain quality of ‘AC Bellatrix’ at a few site-years.”
Claim · model-written summary
Dual fungicide application offered no additional benefit over spring alone.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Multiple fungicide applications, in fall and again in springe6
- Outcome
- additional benefitse6
- Direction
- did not offere6
- Comparator
- single spring applicatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter wheat”
e6“Multiple fungicide applications, in fall and again in spring, did not offer additional benefits to a single spring application.”
The same questions in other papers
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- positive
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231 papers in the same direction as this paper · 30 in the opposite direction
- positive
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See all 262 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.