Abstract
This work was done to demonstrate the opportunities provided by application of meta-analysis in plant pathology. It was a case study used to determine the effectiveness of foliar fungicides in minimising yield loss from a complex of yellow spot (Pyrenophora tritici-repentis) and septoria nodorum blotch (Stagonospora nodorum, teleomorph: Phaeosphaeria nodorum) (YS-SNB disease complex) on wheat in the northern grain-belt of Western Australia. Forty-seven datasets of experimental results from 14 growing seasons, using 18 varieties sprayed one to three times, predominantly with tebuconazole or propiconazole fungicides, were analysed. Across the datasets, the wheat yield gain from fungicide application was 297 kg ha−1 with a 95 % confidence interval of 11.6 kg ha−1. Significant yield gains resulted from single or multiple applications of fungicides. Both propiconazole and tebuconazole, increased yield of wheat affected by the YS–SNB disease complex, with yield gain from propiconazole being greater than that from tebuconazole. Yield response varied significantly among crop growing seasons. Meta-analysis was able to aggregate a large number of experimental results and answer important questions related to the variables that influenced those results; in this case the effectiveness of fungicides in minimising yield loss from the YS-SNB disease complex on wheat. It also identified areas where further research needs to be done. It is concluded that meta-analysis has the potential to contribute to similar analyses in other crop disease systems.
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Claims 8
Claim · model-written summary
Fungicides increased wheat yield by 297 kg ha−1 across datasets.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- fungicide applicatione0
- Outcome
- yield gaine0
- Direction
- gaine0
- Value
- 297 kg ha−1e0
- Qualifier
- 95 % confidence interval of 11.6 kg ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across the datasets, the wheat yield gain from fungicide application was 297 kg ha−1 with a 95 % confidence interval of 11.6 kg ha−1”
Claim · model-written summary
Single fungicide applications gave significant yield gains.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- singlee0
- Outcome
- yield gainse0
- Direction
- gainse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant yield gains resulted from single or multiple applications of fungicides”
t0“wheat”
Claim · model-written summary
Multiple fungicide applications gave significant yield gains.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- multiple applications of fungicidese0
- Outcome
- yield gainse0
- Direction
- gainse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant yield gains resulted from single or multiple applications of fungicides”
t0“wheat”
Claim · model-written summary
Propiconazole increased yield of diseased wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- propiconazolee0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- YS–SNB disease complexe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both propiconazole and tebuconazole, increased yield of wheat affected by the YS–SNB disease complex”
Claim · model-written summary
Tebuconazole increased yield of diseased wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- tebuconazolee0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- YS–SNB disease complexe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both propiconazole and tebuconazole, increased yield of wheat affected by the YS–SNB disease complex”
Claim · model-written summary
Propiconazole gave a larger yield gain than tebuconazole.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- propiconazolee0
- Outcome
- yield gaine0
- Direction
- greatere0
- Comparator
- tebuconazolee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield gain from propiconazole being greater than that from tebuconazole”
t0“wheat”
Claim · model-written summary
Wheat yield response varied significantly among growing seasons.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Yield responsee0
- Setting
- crop growing seasonse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield response varied significantly among crop growing seasons”
t0“wheat”
Claim · model-written summary
Meta-analysis aggregated experimental results to assess fungicide effectiveness and identify further research needs.
- Taxon
- wheatTriticum aestivume0
- Outcome
- answer important questionse0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Meta-analysis was able to aggregate a large number of experimental results and answer important questions related to the variables that influenced those results; in this case the effectiveness of fungicides in minimising yield loss from the YS-SNB disease complex on wheat. It also identified areas where further research needs to be done”
The same questions in other papers
propiconazole · yield · Triticum aestivum (wheat)Results differ
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- no effect
- negative
- negative
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See all 22 papers →tebuconazole · yield · Triticum aestivum (wheat)Positive and negative results
35 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
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See all 38 papers →fungicide · yield · Triticum aestivum (wheat)Positive and negative results
231 papers in the same direction as this paper · 30 in the opposite direction
- negative
- no effect
- no effect
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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.