Food Plant: Achillea millefolium (Yarrow), Tanacetum vulgare (Tansy)

Egg: Laid on the leaf

Mine: June - July

Notes: Initially mines the leaflet, leaving a central line of black frass. Then grazes the leaflet tips externally, causing withering. First found in Aviemore in 1966. It is fairly common on the riverbanks and verges in the Highlands.

Synonymy: B.capreella, B.obscurella, B.merei

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