With the fogging method, insects and other invertebrates can be collected almost completely from tree crowns. All arthropods that are affected by the insecticide drop into the collecting sheets and are collected for identification. Top right: As a result of drought and ash dieback, most F. excelsior trees had died in 2020. Following a mass development of the ash bark beetle Hylesinus fraxini (Curculionidae, Scolytinae), woodpeckers subsequently destroyed the bark of dead F. excelsior trees. This gives the dead trunks their distinctive structure. (Image: Andreas Floren / Universität Würzburg)
With the fogging method, insects and other invertebrates can be collected almost completely from tree crowns. All arthropods that are affected by the insecticide drop into the collecting sheets and are collected for identification. Top right: As a result of drought and ash dieback, most F. excelsior trees had died in 2020. Following a mass development of the ash bark beetle Hylesinus fraxini (Curculionidae, Scolytinae), woodpeckers subsequently destroyed the bark of dead F. excelsior trees. This gives the dead trunks their distinctive structure. (Image: Andreas Floren / Universität Würzburg) 02/21/2022 - How do canopy insects react to the sudden disappearance of their host tree? A study in the floodplain forests along the river Elbe shows surprising results. As a result of the droughts of recent years, a pronounced tree mortality has been observed in Germany, which has left clearly visible gaps in forests and parks.
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