Oak processionary caterpillar

The oak processionary moth (EPS) has been spreading for years. It is also becoming increasingly common in northern Germany. In addition to Bavaria and Baden-Württemberg, it is now also found in Berlin, Brandenburg, Hamburg and Lower Saxony.

In Bremen, the EPS could be introduced from Lower Saxony. Oak trees from other regions could also bring it with them. The caterpillars of the EPS mainly eat oak leaves. They are often found at the edges of forests, in sparse woods or on individual trees. They move in long rows, hence the name.

The caterpillars have fine stinging hairs that are dangerous to humans. Before the hairs grow, the caterpillars can be controlled, for example with chemicals.

Contact with the hairs causes severe itching, which can last for several days. Red spots or hives may appear on the skin, similar to insect bites. Some people experience coughing or breathing problems such as bronchitis or asthma. The eyes may also become irritated and inflamed. In rare cases, the hairs can cause circulatory problems.

Dangerous oak processionary moth or harmless web moth – how can I tell the difference?

A brief overview of the differences between oak processionary caterpillars and web moths can be found on the website of the Bremen Environmental Agency.

Reporting an infestation of oak processionary moths

Have you seen an infestation of oak processionary caterpillars? If so, please report the infestation by email to the Bremen Health Authority.