Food Plant: Rumex hydrolapathum (Water Dock), R.crispus (Curled Dock)

Egg: on the flower

Mine: August - June

Notes: Feeds on the seeds and then later moves to the stem to pupate, where it fixes itself. The case is 7-8mm long, being narrow, tubular and trivalved. Found in the Norfolk Broads, the coastal marshes of Suffolk and also in Co.Durham and East Sussex and Kent. Langdon (2024) discovered R.crispus as another host for this species. Larval cases feeding on Rumex crispus in summer. Larvae can be hard to find in the dense seedheads of this hostplant, but can occur at very high densities - 5 are visible here.

Data: 24.vii.2022, Dungeness, Kent, VC15

Image:© Will Langdon