Stathmopoda pedella (Linnaeus, 1761)
In August-September the larvae live as borers in the still green female catkins, feeding on te seeds. Infected catkins sometimes have a weak discolouration, but otherwise only a little entrance hole and a bit of extruded frass betray their presence. Full grown larvae drop to the ground for pupation.
Alnus glutinosa, incana.
distribution within Europe
Emmet & Langmaid (2002b), Klimesch (1960a), Koster & Sinev (2003a), Pollard (2011a).