The oak processionary moth is active again in Baden-Württemberg. According to the Baden-Württemberg Forest Research Institute (FVA), the caterpillars are currently in their fifth larval stage. This means they are now forming the characteristic web nests where they stay to molt and rest.
Avoid contact at all costs
The caterpillars’ fine stinging hairs are dangerous to humans. According to the FVA, they can cause skin redness, swelling, itching, and irritation of the eyes, mouth, and throat. Direct contact with caterpillars and web nests should therefore be avoided at all costs.
Tübingen treated around 50 locations in May
The city of Tübingen took action against the oak processionary moth at around 50 locations this year as well. These included playgrounds and sports fields, tree stands near schoolyards, as well as public streets and paths. The biocide “Foray ES” was used for the treatment. During this time, the affected areas were cordoned off. Once the treatment solution had dried, they were usable again.
Preventive spraying no longer advisable
According to the FVA, the caterpillars are now so far along in their development that preventive measures using approved products are no longer effective. In sensitive areas such as kindergartens, schools, parks, or playgrounds, it may be advisable to have the webs mechanically removed. However, the FVA points out that such work is labor-intensive and, due to health risks, should only be performed with protective equipment and expert knowledge.
What those affected should do
Anyone who sees caterpillars or webs on oak trees should keep their distance and not touch them. Even abandoned webs may still contain stinging hairs. If you experience symptoms such as severe itching, a rash, eye irritation, or breathing difficulties, it is advisable to see a doctor.
Further information:
https://www.fva-bw.de/daten-tools/monitoring/eichenprozessionsspinner/aktuelle-situation
https://www.tuebingen.de/pressemitteilungen/46316/47190.html
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