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| Analysis - view details of type of pest/disease/disorder | |
| Symptoms | Leaves: young leaves totally eaten, old leaves skeletonized; web-like threads; nests of caterpillars on the stem and in forks of branches; on the stem processions of hairy, greyish-yellow caterpillars with reddish-brown mirror-like spots; Warning! Hairs may cause heavy allergic reactions! Egg layers mostly flat on twigs; possibilities of errors: other insects | |
| Impact | Total defoliation normally only weakens older trees (predisposition to secondary damaging agents!), but if repeated several years, they can cause the death of even old trees. | |
| Control | Biological and biotechnical insecticides at the time of young caterpillars; if control is needed urgently, pyrethroids against feeding caterpillars can be used (see Official Register for Plant Protection). | |
| Hosts | Oak; | |
| Affected plant parts | Leaf; Leaf; |
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| Oak processionary moth – egg layers |
Oak processionary moth – procession of caterpillars |
Oak processionary moth – migrating caterpillars on a stem |
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| Oak processionary moth – total defoliation |
Oak processionary moth – caterpillars |
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