Litylenchus crenatae
The inducer of this gall is unknown or undescribed.
Family: Anguinidae | Genus: Litylenchus
Hosts: Fagus crenata / Fagus grandifolia
Detachable:
Color: brown, yellow, green
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Walls:
Location: between leaf veins
Form: leaf curl
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Possible Range:i
Common Name(s): Beech leaf disease (BLD)
Synonymy: 
Our ID Notes may contain important tips necessary for distinguishing this gall from similar galls and/or important information about the taxonomic status of this gall inducer.
Beech leaf disease symptoms caused by newly recognized nematode subspecies Litylenchus crenatae mccannii (Anguinata) described from Fagus grandifolia in North America.
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[S]ymptoms included interveinal darkening, some puckering, crinkling and irregularly thickened leaves. Mature forest trees exhibited thinned crowns and branch dieback. ... Nearly angular leaf spots, upon close inspection with a stereo-microscope, showed very small angular lesions within the darkened areas ... BLD is associated with tree mortality within 7 years of detection.
”- Carta, Lynn Kay; Handoo, Zafar A.; Li, Shiguang; Kantor, Mihail; Bauchan, Gary; McCann, David; Gabriel, Colette K.; Yu, Qing; Reed, Sharon; Koch, Jennifer; Martin, Danielle; Burke, David J.: (2020) Beech leaf disease symptoms caused by newly recognized nematode subspecies Litylenchus crenatae mccannii (Anguinata) described from Fagus grandifolia in North America.©
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