Abstract
Linear models were used to investigate the effects and interactions of treatments for the control of disease in multifactorial experiments on the dynamics of the take‐ al disease of wheat. Analyses were based on repeated measures of disease on second successive winter wheat crops in three successive se sons. The treatments were date of sowing, presence or absence of triadimenol‐containing seed treatment, autumn nitrogen and chloride applications, timing of early spring nitrogen and total spring nitrogen applications. The effects of treatments were investigated on line and quadratic trends of disease increase and on the integral amount of disease over time. Different disease variables were used to express disease relative to the total and diseased plant populations. The effects of treatments on absolute and relative numbers of diseased roots per plant were also analysed. During three se sons when disease was never severe, the effects of the treatments were shown to be variable. Late sowing consistently reduced disease during the early stages of the epidemic (in the winter months). The effect of late sowing in reducing disease, however, persisted through to the end of the growing se son in only one of the 3 years of the study. autumn nitrogen application and Baytan seed treatment (containing triadimenol) also reduced disease in some seasons. The presence of an effect for either was dependent on sowing date and was most evident on the proportion of diseased roots relative to the diseased plant rather than the total plant population.
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Claims 6
Claim · model-written summary
Treatment effects on wheat disease varied across seasons when disease was not severe.
- Taxon
- wheat
Triticum aestivume0e1 - Qualifier
- three se sonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During three se sons when disease was never severe, the effects of the treatments were shown to be variable”
e1“disease of wheat”
e2“reduced disease in some seasons”
Claim · model-written summary
Late sowing reduced disease in early epidemic stages.
- Taxon
- wheatTriticum aestivume0e1
- Treatment
- Late sowinge0
- Direction
- reducede0
- Qualifier
- early stages of the epidemice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late sowing consistently reduced disease during the early stages of the epidemic (in the winter months)”
e1“disease of wheat”
e2“reduced disease in some seasons”
Claim · model-written summary
The late sowing effect lasted to season end in only one of three years.
- Taxon
- wheatTriticum aestivume0e1
- Direction
- persistede0
- Value
- one of the 3 yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“persisted through to the end of the growing se son in only one of the 3 years of the study”
e1“disease of wheat”
e2“reduced disease in some seasons”
Claim · model-written summary
Autumn nitrogen reduced disease in some seasons.
- Taxon
- wheatTriticum aestivume0e1
- Treatment
- autumn nitrogen applicatione0
- Direction
- reducede0
- Qualifier
- some seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“autumn nitrogen application and Baytan seed treatment (containing triadimenol) also reduced disease in some seasons”
e1“disease of wheat”
e2“reduced disease in some seasons”
Claim · model-written summary
Baytan seed treatment reduced disease in some seasons.
- Taxon
- wheatTriticum aestivume0e1
- Treatment
- Baytan seed treatment (containing triadimenol)e0
- Direction
- reducede0
- Qualifier
- some seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“autumn nitrogen application and Baytan seed treatment (containing triadimenol) also reduced disease in some seasons”
e1“disease of wheat”
e2“reduced disease in some seasons”
Claim · model-written summary
Effects of autumn nitrogen and Baytan depended on sowing date and were most evident for the proportion of diseased roots relative to diseased plants.
- Taxon
- wheatTriticum aestivume0e1
- Outcome
- proportion of diseased rootse0
- Qualifier
- dependent on sowing datee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of an effect for either was dependent on sowing date and was most evident on the proportion of diseased roots relative to the diseased plant rather than the total plant population”
e1“disease of wheat”
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