The larvae of the Blackberry Leaf Midge Dasineura plicatrix cause galls to form on Bramble. The young leaf is creased, pleated or buckled with thickened veins. The larvae are present in the creases briefly in late spring or early summer. The leaf becomes black around the midrib after the larva has left.

Gall  Adult

May be found anywhere that Bramble occurs.

Late spring and summer.

Widespread and fairly frequent in England and Wales.

Fairly frequent in Leicestershire and Rutland.