Forstschutz Aktuell Nr. 65 - Abstracts
Horse-chestnut leafminer (Cameraria ohridella Deschka & Dimić, 1986) on yellow buckeye (Aesculus flava) – observations from Munich
Since the beginning of the successful spread of the horse chestnut leafminer throughout middle Europe in the mid-80s, park and city gardeners have been searching for possible alternative tree species that offer a similar decorative value like the white-flowering horse-chestnut (Aesculus hippocastanum). Until now, the red-flowering horse-chestnut (Aesculus x carnea), which is not infested by C. ohridella, has been preferred. The yellow buckeye (Aesculus flava) is also proposed as alter native tree species, since it is thought not to be infested by the leaf-mining moth. Observations from Munich in recent years, however, show that A. flava can serve as host tree for C. ohridella.
Eutypella canker on maple detected in Bavarian forest stands
Nicole Burgdorf, Markus Blaschke, Ludwig Straßer
Subsequently to the first European finding in 2005 in Slovenia and detections in Austria, Croatia and the Czech Republic, Eutypella parasitica, the causal agent of maple canker, was first detected in Germany in the urban area of Munich in 2013 (Cech et al. 2016). New studies show that the fungus is established also outside the urban area in adjacent forest stands. Our survey resulted in detection of Eutypella canker in deciduous forest stands in southern Bavaria. Increasing damage to drought-tolerant tree species of the genus maple, particularly Acer pseudoplatanus, is expected for the next years.
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