Species can trigger allergies. In search of food, the caterpillars leave the nests once in a colony; These long lines of caterpillars are the quintessential "procession". Again, you should avoid touching it as much as possible.
But the deviations are warnings of the contact of canvases and caterpillars living there on shrubs such as monkeys, hawthorns, hawthorns, cherry trees, etc. touching General caution only applies to oaks.
No and yes No, because caterpillars turn into juvenile moth stage in July. Butterflies flying over the month of August are not dangerous. And even if many butterflies hatch, if, as this year, many caterpillars were present, they are an important source of food for insectivorous birds and mammals, but also for lizards, spiders, etc. This also applies to caterpillars.
Yes, there is always a danger, because there is a lot of hair left in the abandoned paintings and there is always a potential risk of triggering allergies. So, even the paintings abandoned and over the years on the oaks do not touch!
Should the "nests" of caterpillars be poisoned?
Absolutely not, because all insecticides – no matter how they are declared "ecological", harm the fauna and flora of oaks and their environment. Effective control, implemented in many municipalities, involves vacuuming with special devices and removing "nests" (usually by burning).
A fundamental struggle, however, is debatable – simply because there are already a lot of predators for caterpillars. Measures should only be taken when children, people with dementia and people with disabilities visit the facility regularly. Otherwise, it is usually sufficient to make warnings and, where appropriate, local closures.
Generally, there is no need to close parks, forests or entire hiking trails, as settlements are usually concentrated locally.
Further information: http://www.ag-rh-w-lepidopterologen.de/eps-info/
Archive: Eichenprozessionsspinner: The Municipal Administration blocks Jahnstadion