Agromyza woerzi Groschke, 1957
Blotch, invariably beginning at the leaf margin, and widening fast and strongly. Primary and secondary feeding lines very conspicuous. Frass in coarse grains. Pupation outside the mine.
Knautia arvensis, drymeia.
Larvae in June (Hering, 1957a).
Not known from the Benelux countries (Fauna Europaea, 2007).
distribution within Europe
From Germany eastwards to the Baltic States and Belarus (Fauna Europaea, 2007).
De Meijere (1926a) described the larva of an Agromyza sp., reared from Knautia; later (1928a) he wrote the he finally had identified this material as A. dipsaci. This is not correct: in reality it concerned A. woerzi. Rear spiraculum with 3-4 papillae.
Buhr (1964a), Černý & Bächli (2018a), Černý & Merz (2006a), Dursun, Civelek, Barták ao (2015a), Groschke (1957a), Hering (1957a), Huber (1969a), de Meijere (1926a, 1928a), Pakalniškis (1995a, 1998a), Papp & Černý (2015a), von Tschirnhaus (1999a).