Abstract
Abstract Alternaria solani is causing early blight and thereby yield reduction in the potato production. The pathogen is today mainly controlled by fungicide applications. The severity of early blight can vary largely among fields. The aim of this study was to gain understanding of what field and management parameters are the most important for early blight severity to create more farm-specific fungicide treatment recommendations. Over three seasons, 2019–2021, 52 field plots were observed at farms in southern Sweden. In each field a 24 m × 24 m plot was left untreated against early blight. However, late blight fungicides were applied. The disease severity was scored twice in the untreated plot and information about various soil/plant parameters and farmer’s management was collected from each field. In addition to the observational study, field trials were performed in 2021 and 2022, evaluating the effect of potassium fertiliser levels on severeness of infection. We found that the soil composition was of significant importance for the severity of infection, in particular the sand, clay, and potassium content. The early blight severity was directly positively correlating with a high sand content. Low levels of leaf potassium increased the severity of early blight infection, and this observation was confirmed in field trials where different levels of potassium fertiliser were applied. Further no reduction in disease severity was observed with a four-year crop rotation. With knowledge about field and management factors that influence disease, field-specific recommendations can be developed supporting an integrated pest management strategy for early blight to reduce and optimise the fungicide usage.
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Claims 6
Claim · model-written summary
Soil composition significantly influenced potato early blight severity, particularly sand, clay and potassium content.
- Taxon
- Potato
Solanum tuberosumt0 - Interactor
- Alternaria solani
Alternaria solanie1pathogen - Outcome
- severity of infectione0
- Setting
- soil compositione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil composition was of significant importance for the severity of infection, in particular the sand, clay, and potassium content”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
Claim · model-written summary
Higher sand content was positively correlated with early blight severity.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- Alternaria solaniAlternaria solanie1pathogen
- Outcome
- early blight severitye0
- Direction
- positively correlatinge0
- Setting
- high sand contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The early blight severity was directly positively correlating with a high sand content”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
Claim · model-written summary
Low leaf potassium increased potato early blight severity.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- leafe0
- Interactor
- Alternaria solaniAlternaria solanie1pathogen
- Outcome
- severity of early blight infectione0
- Direction
- increasede0
- Setting
- Low levels of leaf potassiume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low levels of leaf potassium increased the severity of early blight infection”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
Claim · model-written summary
Potassium fertilizer trials confirmed the association between low leaf potassium and early blight severity.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- different levels of potassium fertilisere0
- Interactor
- Alternaria solaniAlternaria solanie1pathogen
- Outcome
- this observatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this observation was confirmed in field trials where different levels of potassium fertiliser were applied”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
Claim · model-written summary
A four-year crop rotation did not reduce potato early blight severity.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- four-year crop rotatione0
- Interactor
- Alternaria solaniAlternaria solanie1pathogen
- Outcome
- disease severitye0
- Direction
- no reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no reduction in disease severity was observed with a four-year crop rotation”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
Claim · model-written summary
The authors propose field-specific recommendations to reduce and optimize fungicide use for early blight.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- Alternaria solaniAlternaria solanie1pathogen
- Outcome
- field-specific recommendationse0
- Qualifier
- to reduce and optimise the fungicide usagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“field-specific recommendations can be developed supporting an integrated pest management strategy for early blight to reduce and optimise the fungicide usage”
t0“Potato Early Blight Severity”
e1“Alternaria solani is causing early blight”
The same questions in other papers
fertilization · Alternaria solani · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.