Ocnerostoma friesei Svensson, 1966

grey pine ermine

Ocnerostoma friesei larva

Pinus sylvestris, Hilversum (winter); tip of the needle to the left

Pinus sylvestris, Posbank; tip of needle, with an egg

mine

The mine begins at an oval egg on the flat side of the tip of a needle. Working from here the larva mines the needle for about one quarter of its length. Apart from the larval chamber, the entire mine is filled with frass. The full grown larva leaves the mine by an opening made at the end of te mine, then forms a cocoon between a few needles that have been spun together. Only the pupa enables discrimination from O. piniarella.

hostplants

Pinaceae, monophagous

Pinus mugo, sylvestris.

Reported occurrences on Abies alba, and especially Juniperus need further confirmation.

phenology

Larvae in December – March and June – July (Agassiz, 1996a), adults in April – May and August (Koster, 1990a).

BENELUX

BE recorded (Phegea, 2010).

NE recorded (Kuchlein & de Vos, 1999a; Microlepidoptera.nl, 2010).

LUX not recorded (Fauna Europaea, 2010).

distribution within Europe

From Fennoscandia and North Russia to Spain and the Alps, and from Ireland to the Ukraine (Fauna Europaea, 2010).

larva

pupa

references

Agassiz (1996a), Baldizzone (2004a), Bengtsson & Johansson (2011a), Corley, Merckx, Cardoso, Dale,Marabuto, Maravalhas & Pires (2012a), Gómez de Aizpúrua (2003a), Huemer (2012a), Koster (1990a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Patočka & Turčáni (2005a), Robbins (1991a), Svensson (1966a).

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