Within the current research work 20 sample trees (mean diameter at
breast height 15 cm) infested by the Large Poplar Longhorn Beetle
(Saperda carcharias) have been felled and analyzed. The lowest
stem-parts and the crown-attachment-areas exhibited the most intense
infestation. In total 88 larval galleries (median length: 199 mm; mean
length: 195 mm) have been found. The number of entry-/ exit-areas varied
from one to four per larval gallery. It has been remarkable that the
larvae often mine deeply in the sapwood. A quarter of all galleries have
been branched. No distinct pupal chamber with more than one entrance has
been noticed, but all galleries contained at least one dead end, which
sometimes possessed an irregular enlargement. Characteristic exit holes
have been rare and often found horizontally above entry areas.
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