Food Plant: Alnus glutinosa (Alder)

Egg: Upper side of leaf

Mine: May-July:August-October

Pupa: Under a silk membrane on underside of leaf

Notes: Initially in an irregular upper surface gallery becoming a blotch usually over a vein (as shown). Later in two successive longitudinally rolled leaves.

Data: 08.x.2018, Treborth Botanic Gardens, Caernarvonshire, VC49, Andy & Melissa Banthorpe

Image:© Melissa Banthorpe