Last modified: May 7, 2024, 4:54 p.m.
A very rare and local species in Belgium, mainly found in the northern part and especially in the Kempen region.
This species is considered Vulnerable according to the IUCN Red List category for Flanders 2023.
Native
Male: uncus elongated with pointed apex; gnathos reduced; valva narrow, semilanceolate, broadly rounded distally; juxta somewhat hexagonal with short lateral tubercle like extensions; saccus relatively wide, broadly rounded distally; phallus longer than valva, slender, slightly c-shaped; vesica without cornuti.
The larva bores in the lower part of the culm and development takes two years. Pupation in the spring in the upper part of the culm.
The adult moths come to light.
The adults have been seen from mid-May till mid-September with a peak during June.
The monophagous larva feeds on the stems of Phragmites australis.
It inhabits fens, marshes, reedswamps and reedbeds.