Turnip Sawfly - Athalia rosae

Description

Length is about 7-8 mm. This species is relatively easy to identify, with an orange thorax, abdomen and legs contrasted with black head and 'shoulder pads'. It also has an obvious black front edge to its wings. The abdomen is thick; pointed in female, rounded in male.

Habitat

The adults feed on nectar visiting a range of flowers, often cruciferous plants and umbellifers.

When to see it

First generation fly in May and June

Life History

Larva are dark greeny-grey, or almost black (18-25 mm). The larva overwinters in the ground in a cocoon. It feeds on cruciferous plants where it can be a pest.

UK Status

Although thought to be fairly common, most British records are from the south.

VC55 Status

Fairly common in Leicestershire and Rutland.

Leicestershire & Rutland Map

UK Map