Claim · model-written summary
Initial symptoms were irregular brown spots that later expanded into grayish-brown blighted areas.
- Taxon
- Acer palmatum
Acer palmatumt0 - Outcome
- irregular brown spots that later expanded into grayish-brown blighted arease0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Initial symptoms appeared as irregular brown spots that later expanded into grayish-brown blighted areas”
t0“Acer palmatum”
Title
First Report of Coniella quercicola Causing Leaf Spot on Palmate Maple ( Acer palmatum ) in Korea
Jiwon Kim; Sang-Tae Seo; Ki Hyeong Park Plant Disease 2026. doi:10.1094/pdis-12-25-2581-pdn
Other claims from this paper (10)
- Observation This is the first report of Coniella quercicola on Acer palmatum in Korea.
- Observation Leaf spots and blights were observed on several maple trees in Cheonan, Korea.
- Observation The fungal conidia measured 9.4-18.2 x 1.2-4.1 um (n = 38), consistent with Coniella quercicola.
- Observation ITS and LSU sequences of the isolates showed 100% identity to Coniella quercicola in BLAST searches.
- Observation TEF1-alpha of isolate S10 showed 98.33% identity to Coniella quercicola.
- Observation TEF1-alpha of isolate HM3 showed 98.42% identity to Coniella quercicola.
- Observation In a maximum-likelihood tree of concatenated ITS, LSU and TEF1-alpha sequences, the isolates clustered with Coniella quercicola strains.
- Intervention effect Leaves of A. palmatum inoculated with the conidial suspension developed typical lesions, whereas control leaves remained symptomless.
- Observation The pathogen was re-isolated from symptomatic tissue and identified as C. quercicola, fulfilling Koch postulates.
- Recommendation Occurrence of the pathogen on ornamental Acer trees suggests a potential risk to landscape and forest ecosystems and a need for continued monitoring and management.