Claim · model-written summary
In the untreated control of the Niagara juice grape trial, downy mildew severity reached 26% in 2021.
- Taxon
- Juice Grapest1
- Material
- Niagarae1
- Interactor
- Plasmopara viticola
Plasmopara viticolat0pathogen - Outcome
- severitye0
- Value
- 26%e0
- Qualifier
- untreated control (UTC)e0
- Setting
- Fennville, MIe1
Not reportedGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the untreated control (UTC) reached 34% incidence and 26% severity in 2021 versus 90% incidence and 57% severity in 2022”
e1“a mature ‘Niagara’ vineyard in Fennville, MI”
t0“Plasmopara viticola”
t1“Juice Grapes”
Title
Nancy Sharma; Lexi Heger; Roger Sysak; et al. Plant Health Progress 2026. doi:10.1094/php-10-25-0241-sc
Other claims from this paper (9)
- Observation In the untreated control of the Niagara juice grape trial, downy mildew incidence reached 34% in 2021.
- Observation In the untreated control of the Niagara juice grape trial, downy mildew incidence reached 90% in 2022.
- Observation In the untreated control of the Niagara juice grape trial, downy mildew severity reached 57% in 2022.
- Intervention effect Across both years, mandipropamid provided consistent control of grape downy mildew, reducing incidence and severity AUDPC values by more than 70% compared with the untreated control.
- Intervention effect Across both years, cyazofamid provided consistent control of grape downy mildew, reducing incidence and severity AUDPC values by more than 70% compared with the untreated control.
- Intervention effect Across both years, fenamidone provided consistent control of grape downy mildew, reducing incidence and severity AUDPC values by more than 70% compared with the untreated control.
- Observation All 24 P. viticola isolates collected in 2022 belonged to P. viticola clade aestivalis.
- Observation The G1105S mutation associated with resistance to carboxylic acid amides was not detected in the P. viticola isolates.
- Observation The G143A mutation conferring resistance to quinone outside inhibitor fungicides was present in 12 P. viticola isolates.