The bark beetle has done in the past year, in many German forests, caused enormous damage and threatens to be in 2019, a plague.
“The insects have increased due to the dry and warm weather conditions particularly well,” said the Julius-Kühn-Institute (JKI) on request. After the strong Storms of the beetle, I used the overturned coniferous wood as breeding material, said a spokeswoman for the Federal research Institute for cultivated plants. If the mass propagation continue, depends on the temperatures in April.
After a rough extrapolation, the JKI has estimated the damaged timber volume nationwide, with about eleven million cubic metres. A cubic metre of wood is equal to one cubic meter of solid wood mass. Used to Pay the research Institute with headquarters in Quedlinburg (Saxony-Anhalt), which it set in December 2018 in the case of the forest protection service of the Federal States has requested. Due to the Wood supply overhang, which is also caused by the harmful wood, had yielded to the prices for spruce wood regional up to 50 percent.
The damage from the JKI, according to regional differences. Particularly strong in the spruce areas in North Rhine-Westphalia, Hesse, Bavaria, Baden-Württemberg and Saxony were affected. In Hesse forest experts reported at the end of February of the catastrophic conditions, and beat a stock Alarm.
Also in Bavaria, were infested 2018 first calculations, more trees than in the previous years. In January, the Ministry of agriculture in Baden had reported-Württemberg, that the beetles were so active as for the last 15 years.
Some countries are already reacting to the threat of re-infestation. In Saxony, where it is the largest mass propagation of bark beetles since the Second world war give, according to the Ministry of the environment currently, forest owners ensures the help. For the years 2019 and 2020, more than eight million euros were overall, for the processing of residual wood, and the Debarking of trunks or the removal of the tribes from the forest.
In lower Saxony, the Ministry of the environment gave last week the green light for the use of plant protection products in environmentally sensitive areas. In addition, the cases and the removal of the trees will be there this year, exceptionally, without interruption.
To the family of bark beetles include various species, which differs according to the Julius Kühn-Institute, roughly in cattle-breeder and Wood-nesting birds. The most damage is the larvae of the cattle breeder to notify the JKI spokeswoman, according to, including a printer and engraver. They nourish themselves of the juice-bearing layers in the cortex. “Since this layer is the lifeline of the tree, the infestation is usually to the death,” explains the JKI spokeswoman.