AT A GLANCE
Does the processionary moth attack the birch?
Birch trees are not among the endangered tree species. In years with a very high infestation, however, it can happen that a few young birches being attacked by processionary moths. The necessary combat requires special knowledge of handling insecticides and should left to professionals become.
Which regions are particularly affected?
The processionary moth occurs more often in warm and dry regions of Germany on, for example in the Rhineland, and turns out to be the largest pest of the oak.
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What do the processionary moth and its caterpillars look like?
The adult moth is inconspicuous grey-brown and has a wing width of 3-4 cm. The caterpillars are up 5 cm long, yellowish brown colored and with innumerable long white hairs littered. It is striking that they usually occur in masses and practically all of them Oak or. can weave in birch. In addition, more than 100 species of butterflies visit the birch every year. caterpillars on birches are not uncommon, but mostly harmless.
When are processionary moth caterpillars active?
The larvae hatch about mid August and are until October active in the tree. After that, they form silky nests where they spend the winter. In the spring they move towards the ground, where they burrow and web themselves into the earth.
How can processionary moths become dangerous to humans?
The stinging hairs of caterpillars contain a protein called thaumetopoein. It can as nettle poison to be viewed as. Contact with the hairs can have serious consequences for people, e.g. e.g.:
- Skin irritation such as itchy caterpillar dermatitis
- bronchitis
- conjunctivitis
- allergic shock reaction
Incidentally, the tiny hairs can break off very easily, float around in the air and be absorbed through the respiratory tract when walking past. The stinging hairs are on discarded skins lying around somewhere in the undergrowth.
How can I protect myself from caterpillars of the processionary moth?
Appropriate warning signs or barriers are often set up in affected forests. You should generally don't get too close, let alone touch the caterpillars. And should you unexpectedly come into contact with them, have a shower and change clothes. Find one immediately Physician when you feel the first symptoms of an allergy.
Tip
Report infested trees to the local gardening department
For infestation with the oak processionary moth no obligation to report. If you discover an oak, birch or other tree with countless caterpillars on a walk and suspect the oak processionary moth, you should still report it to the authorities. They can then decide whether control is necessary.
