Plant Parasites of Europe

leafminers, galls and fungi

Bagous alismatis

Bagous alismatis (Marsham, 1802)


The mine starts with a broad corridor, someplace on the leaf. Later a broad blotch, not determined by heavy veins. The mine is full depth and very transparant. The colour in the end is reddish-brown, making mined plants very conspicuous, even from a distance. Frass irregular. Often several larvae in a mine. The larvae are able to leave their mine and restart elsewhere, either on the same or on another leaf. Pupa in a pupal chamber in the midrib or petiole.

host plants

Alismataceae, oligophagous

Alisma lanceolatum, plantago-aquatica; Luronium natans; Sagittaria sagittifolia.


Larvae in June-July (Scherf, 1964a).


BE recorded, 2010).

NE recorded (Heijerman, 1993a).

LUX recorded (Fauna Europaea, 2007).

distribution within Europe

All of Europe, including the British Isles, but excluding the Iberian and Balkan Peninsula.

larva & pupa

Scherf (1964a), Urban (1926a), Gosik (2008a).


Hydronomus alismatis.


Buhr (1933a, 1964a), Delbol (2013a), Dieckman (1983a), Drăghia (1974a), Gosik (2008a), Gruschwitz (2001a), Heijerman (1993a), Hering (1925a. 1930a, 1957a), Huber (1969a), Menet (2012a), Michalska (1970a, 1976a), Nowakowski (1954a), Rheinheimer & Hassler (2010a), Robbins (1991a), Scherf (1964a), Skala & Zavřel (1945a), Sønderup (1949a), Stejskal (2004a), Turner (2011a), Urban (1926a), Vorst (2010a), Yunakov, Nazarenko, Filimonov & Volovnik (2018a).

Last modified 25.xi.2023