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 (as shown, in a stem of Conium maculatum (Hemlock)), with up to 20 larvae being found in a stem.

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

Image:© Will Langdon