Pea Gall Sawfly - Pontania viminalis

Alt Name
Eupontania gallarum and as Eupontania viminalis

The sawfly Pontania viminalis causes galls to form on certain Willow species


Anywhere that the host plants such as Crack-willow, Purple Willow and Osier are found.

When to see it

There are two broods with adults flying May/June and July/August.

Life History

The pea shaped gall is formed on the midrib on the underside of the leaf and often reddens.

UK Status

Occasional in Britain

VC55 Status

Uncommon in Leicestershire and Rutland.

Leicestershire & Rutland Map

UK Map