Abstract
Gnomoniopsis castanea is an emerging pathogen of Castanea species, causing nut rot, bark cankers, and leaf necrosis, while also existing asymptomatically as an endophyte. This study evaluated the presence of G. castanea spores in two chestnut orchards in Trás-os-Montes (Sobreiró, Vinhais) and assessed the effect of copper-based fungicides in reducing inoculum levels in leaves and burrs. Air samples were collected weekly from May to October 2024 at two heights per tree using a SAS air sampler. Colonies identified as G. castanea were isolated and cultured for confirmation. Additionally, symptomatic leaves and burrs were treated with Nordox copper (1 g/L) and incubated in outdoor cages at Instituto Politécnico de Bragança. Air sampling from these cages was conducted between March and June to detect remaining spores. In vitro sensitivity tests were performed using copper sulphate and Copper Nordox at varying concentrations. Airborne spores were detected in both orchards, and a total of 50 G. castanea isolates were obtained, confirming species identity via molecular analysis. The in vitro trials showed increasing inhibition with higher copper concentrations. Copper Nordox was more effective, achieving up to 54.29% inhibition, compared to a maximum of 17.46% with copper sulphate, indicating its potential to reduce disease inoculum in chestnut orchards.
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Claims 5
Claim · model-written summary
Airborne G. castanea spores were detected in both chestnut orchards.
- Taxon
- chestnutt0
- Interactor
- Gnomoniopsis castaneaGnomoniopsis castaneaee1pathogen
- Outcome
- Airborne sporese0
Verbatim
e0“Airborne spores were detected in both orchards”
t0“chestnut groves”
e1“Gnomoniopsis castanea is an emerging pathogen of Castanea species”
Claim · model-written summary
Fifty G. castanea isolates were obtained and confirmed molecularly.
- Taxon
- chestnutt0
- Interactor
- G. castaneaGnomoniopsis castaneaee0pathogen
- Outcome
- G. castanea isolatese0
- Value
- 50e0
Verbatim
e0“a total of 50 G. castanea isolates were obtained, confirming species identity via molecular analysis”
t0“chestnut groves”
Claim · model-written summary
Higher copper concentrations increasingly inhibited G. castanea in vitro.
Verbatim
e0“The in vitro trials showed increasing inhibition with higher copper concentrations.”
t0“chestnut groves”
e1“Gnomoniopsis castanea is an emerging pathogen of Castanea species”
Claim · model-written summary
Copper Nordox inhibited G. castanea by up to 54.29%.
Verbatim
e0“Copper Nordox was more effective, achieving up to 54.29% inhibition, compared to a maximum of 17.46% with copper sulphate”
t0“chestnut groves”
e1“Gnomoniopsis castanea is an emerging pathogen of Castanea species”
Claim · model-written summary
Copper sulphate inhibited G. castanea by at most 17.46%.
Verbatim
e0“Copper Nordox was more effective, achieving up to 54.29% inhibition, compared to a maximum of 17.46% with copper sulphate”
t0“chestnut groves”
e1“Gnomoniopsis castanea is an emerging pathogen of Castanea species”
The same questions in other papers
copper atom · Gnomoniopsis castaneae · CastaneaResults agree
1 paper in the same direction as this paper
- positive
sulfate · Gnomoniopsis castaneae · CastaneaResults agree
1 paper in the same direction as this paper
- 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.