Food Plant: Epiobium hirsutum (Great Willowherb)

Gall: July

Notes: The larva lives in the pith of the stem, causing galling. It generally feeds upwards and prefers flowering side stalks. The gall may be red (as shown). Widely distributed, but possibly overlooked. Occurs in marshes, damp fields and ditches. May occur in dry habitats in urban areas.

Data: 14.viii.2011, Hilsea Lines NR, Portsmouth, Hants, VC11

Image:© John Langmaid