Euura amerinae - Bay Willow Shoot-galler

See Liston et al (2017) for determination of adults. The main host plant is a widespread species.

Larvae feed on shoots of bay willow causing a large walnut shaped gall to form on one side of the shoot, often bent and containing several larvae.

Size: Female: 3.5 - 5.1mm, male: 3.8 - 6.0mm

Status: Local

Distribution: England, Scotland, Ireland

Flight period: Univoltine

Plant associations: Salix pentandra (bay willow)


Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Liston, A.D., Heibo, E., Prous, M., Vårdal, H., Nyman, T. and Vikberg, V., 2017. North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae). Zootaxa, 4302(1), pp.1-115.

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168.