Yponomeutidae : Yponomeutinae
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Photo © Neil Sherman

Similar Norfolk Species
Ocnerostoma piniariella
White Pine Ermine
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Ocnerostoma friesei
Grey Pine Ermine
(Svensson, 1966)445 / 16.024
Norfolk status
Rare.
Double or triple-brooded.
Males have pale grey forewings, females are white.

Can be confused with the similar pine feeding species Ocnerostoma piniariella.
O. friesei initially has an earlier flight time, however a gen. det. is required to confirm any specimens.

Note differences in antennae, Ocnerostoma friesei: grey. O. piniariella: ringed white and pale grey (male) and white (female)
To see this, a very good hand lens or low-powered microscope with good lighting is required.

The larvae, not distinguishable from O. piniariella, mine the needles of the foodplant from December to March, June to July and sometimes September.

First Norfolk record at Dersingham in 2011 (R.Jones, 14/04/11)

[MBGBI vol3, p65]

Determination by Genitalia Examination (gen. det.) Required

Recorded in 10 (14%) of 69 10k Squares.
First Recorded in 2011.
Last Recorded in 2020.
Additional Stats

< Ocnerostoma piniariella  |  Ypsolopha mucronella >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
15/08/2020128TL79 - Methwold/Foulden
11/08/2020127TG14 - Sheringham
05/08/2020128TL78 - Hockwold/Weeting
21/05/2020128TL99 - Thompson/Gt.Hocking
20/05/2020128TF81 - Castle Acre/Litcham
 Show Details | 1990 to 2020 | 2000 to 2020 |
Express Record Ocnerostoma friesei
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Wingspan: 8-10mm
Flight: Two or Three Generations
March - May, Aug, Nov
Foodplant:   Scots Pine
Nat Status: Local
Verification Grade:  Adult: 4
 Immature Adult
Further info: Ocnerostoma friesei
 
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Historical UK Distribution (pre 2013)
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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ 2021. © James Wheeler - Norfolk Moths 2007 - 2021. Data © NOLA™ 2021
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