Food Plant: Cytisus/ Sarothamnus (Broom), Genista tinctoria (Dyer's Greenweed).

Egg: On a stem. The egg is not filled with frass and soon drops off when the larva hatches (which distinguishes it from Trifurcula immundella, where the egg remains).

Mine: September-May

Pupa: In a white silken cocoon attached to a stem (as shown).

Notes: A gallery in the bark of the food plant generally mining upwards, similar to that of Trifurcula immundella, which usually mines downwards.

Data: Bedfordshire

Image:© Charles Baker