When infested, the bark peels off of the trunk and whole sheets of it can be removed. On the inner surface, fine, pale lines can be identified as burrows and developmental stages of spruce bark-beetles – on this small sheet of bark we counted 38 beetles.
© Wald und Holz NRW, Nadine Neuburg

90% of bark-beetles survive

Article by Fabian Pöschel, translated by Susanne Höfler | 14.03.2019 - 10:42


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