Ground-ivy - Glechoma hederacea

Agromyza flavipennis

The larvae of the Agromyzid fly Agromyza flavipennis mine the leaves of Lamium species such as White Dead-nettle as well as Yellow Archangel and Ground-ivy, creating a large pale blotch at the edge of the leaf. 

Phytomyza glechomae

The larva of the Agromyzid fly Phytomyza glechomae mines the leaves of Ground-ivy. The leaf-mine starts with a corridor section, which widens, sometimes into a blotch, and then another corridor is made. 

Lighthouse Gall

The larva of the gall midge Rondaniola bursaria causes galls (sometimes referred to as Lighthouse Galls) to form on the leaves of Ground-ivy. The gall takes the form of a hairy cylinder up to 4 mm tall, often several on the upper surface of a leaf. The galls are initially green, later light red or brown. Each gall contains a single larva. Galls fall off the leaf in late summer leaving a neat, circular hole. 

Puccinia glechomatis

The rust fungus Puccinia glechomatis galls the leaves of Ground-ivy affecting the stem, petiole or underside of the leaf veins. The yellow, brown or black swellings bear telia.  There is no host-plant alternation, and only telia are produced.

Coleophora albitarsella

The cased larva of the moth Coleophora albitarsella feeds on the leaves of Ground-ivy, leaving translucent patches in the leaves where feeding has taken place.

Liposthenes glechomae

Liposthenes glechomae is a cynipid gall wasp that causes galls to form on Ground-ivy. The galls are globular hairy swellings on the undersides of leaves or apparent on both sides of the stem. They are green or reddish in sunlight, soft at first becoming hard and containing a white larva. 

It is a unisexual species, with males rare or absent; the females reproduce by parthenogenesis.