Depressaria ultimella Stainton, 1849
fen flat-body
on Apiaceae
parasite
The larva bores in the stem, initially in the inflorescence, but gradually descending into older and thicker stems. Infected plants recognisable by withering stems. Pupation in the lower part of the stem, not infrequently below the water table.
host plants
Apiaceae, oligophagous
Cicuta virosa; Helosciadium nodiflorum; Oenanthe aquatica, crocata; Sium latifolium.
phenology
Larvae in June-August.
distribution within Europe
larva
Head light brown; prothoracic plate yellowish; body, thoracic feet and anal plate greenish, no length lines; pinacula black with grey setae. See also Fetz.
references
Blaik, Dobrzański, Hołowiński & Zajda (2019a), Emmet & Langmaid (2002b), Fetz (1994a), Heckford (1982a), Huisman & Koster (1996a), Huisman, Koster, van Nieukerken & Ulenberg (2004a), Muuus (2022c).