Eriophyes laevis
The mite Eriophyes laevis causes galls to form on the leaves of Alder (Alnus glutinosa). The galls start off shiny yellow, becoming green then red, purplish or brown. They are scattered over the leaf, often numerous, and with a small opening below. The gall is seen more often than the mite.
Aceria nalepai also causes galls on alder leaves, but in the axils of midrib/veins. However, indeterminate examples can be found, and combinations of the galls are common.
Gall 
Adult 
State host, and provide a photo
On Alder
The gall can be seen at any time that Alder is in leaf, best time is around August and September.
Widespread and fairly frequent in Britain.
Fairly frequent in Leicestershire and Rutland.
David Nicholls
Watermead Country Park
27 September 2013
galls on Alder
Graham Calow
Witherley
26 September 2015
Graham Calow
Witherley
26 September 2015
Graham Calow
Witherley
26 September 2015
David Nicholls
Thornton Reservoir
05 October 2019
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Species group:
- Mites, Ticks & Pseudoscorpions
- Kingdom:
- Animalia
- Order:
- Trombidiformes
- Family:
- Eriophyidae
- Records on NatureSpot:
- 66
- First record:
- 15/06/2013 (Woodward, Steve)
- Last record:
- 21/10/2024 (Timms, Sue)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.
Latest images
Latest records
David Nicholls
Watermead Country Park
27 September 2013
David Nicholls
Ratby
05 June 2014
on Alder
