Food Plant: Conium maculatum (Hemlock), Smyrnium olusatrum (Alexanders) Elsewhere: Pastinaca sativa (Parsnip0

Mine: August-May

Notes: Initially feeds on the seeds until the autumn. It then enters the stem, usually in the upper part, to hibernate and can congregate gregariously, with up to 20 larvae being found in a stem. A larval entry hole is shown in a stem of Conium maculatum (Hemlock).

Data: 26.ii.2021, Astons Eyot, Oxfordshire, VC23

Image:© Will Langdon