Udea decrepitalis is a moth of the family Crambidae described by Gottlieb August Wilhelm Herrich-Schäffer in 1848. It is found in most of Europe (except Iceland, Ireland, the Iberian Peninsula, the Benelux, Denmark, Greece, Bulgaria, Croatia, Hungary and Ukraine), east into Russia.

Udea decrepitalis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Crambidae
Genus: Udea
Species:
U. decrepitalis
Binomial name
Udea decrepitalis
Synonyms
  • Botys decrepitalis Herrich-Schaffer, 1848
  • Pionea decrepitalis ab. leucoalis Strand, 1920

The wingspan is 23–27 mm. Adults are on wing from May to July.

The larvae feed on Dryopteris carthusiana.

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