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1021 ~ Cnephasia asseclana ~ Flax Tortrix
UK Status

Resident. Widespread and generally common throughout the British Isles as far north as Morayshire.

Montgomeryshire Status

Recorded from a few sites across the county.

Wingspan :   M & F, 15-20mm.

Confusion species

C. insertana.
Flight time & Voltinity (Univoltine)


Many habitats.


A wide range of herbaceous plants.

Lifestage data

Leaf miner/spinning. Eggs laid on a leaf. Larva first mines a leaf then feeds externally from within a spinning by drawing fresh leaves together. Pupates in a folded leaf edge or in debris on the ground.
Click map for larger image

Montgomeryshire photos

Photo by PRW, 13th June 2011, Commins Coch

Photo by MDH, 4th July 2011, Llanfyllin
Female confirmed by Gen. Det. (ANG)