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First report of Cryptostroma corticale on Aesculus hippocastanum causing sooty bark disease in Germany

GND
1242746048
ORCID
0009-0000-9968-8893
Affiliation
Julius Kühn Institute (JKI), Institute for Plant Protection in Horticulture and Urban Green, Germany
Brenken, Ann-Christin;
ORCID
0009-0009-5073-3919
Affiliation
University of Applied Sciences and Arts,Faculty Resource Management, Germany
Kehr, Rolf;
GND
1204034958
ORCID
0000-0002-0160-4813
Affiliation
Julius Kühn Institute (JKI), Institute for Plant Protection in Horticulture and Urban Green, Germany
Riebesehl, Janett;
Affiliation
Forstbetrieb Herter GmbH, Germany
Esch, Jonas;
GND
1093413204
ORCID
0000-0002-3436-9581
Affiliation
Julius Kühn Institute (JKI), Institute for Forest Protection, Germany
Enderle, Rasmus

Cryptostroma corticale is the causal agent of sooty bark disease, which was first described in the middle of the last century and has developed in recent years to a relevant threat for Acer spp. trees in Central Europe. Triggered by extreme heat and drought, this tree disease is becoming more and more important in the course of climate change. Acer pseudoplatanus is a particularly affected tree species, but the disease has also been observed on other Acer spp., and there is some indication that there are suitable hosts outside the Acer genus. In literature, Aesculus hippocastanum was mentioned twice to be a host, however, without any proof or details. With this study, we verify the assumption that A. hippocastanum is a host of C. corticale by morphological and phylogenetic analyses based on a case in Germany. Furthermore, we provide microscope pictures of microtome sections of the specimens, showing the spore production of C. corticale on A. hippocastanum.

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