Stem miner (Diptera: Agromyzidae) in Teucrium

Record Details

Record no.:	0565
Feeding guild:	Stem miner
Taxonomy:	Diptera: Agromyzidae: Ophiomyia sp.
Stages observed:	trace, larva, puparium
Distribution observed:	IA
Hosts in Teucrium:	T. canadense (germander)

I observed active Ophiomyia stem mines in Teucrium in mid-June, with puparia formed in the mines by early July. I also located and photographed completed mines in October and black puparia overwintering on dead stems in January. One of the January puparia was positioned in the uppermost part of the stem, within ~70mm of the very top, just below the infructescence.

Featured Images

[?] Top

Image #: 565-13 Terminus of stem mine, backlit, showing puparium under epidermis.

Image #: 565-14 Puparium at end of stem mine.

Image #: 565-15 Puparium, with anterior spiracles projecting through epidermis.

Image #: 565-16 Puparium overwintering in dead stem.

Image #: 565-18 Overwintering puparium, dorsal.

Image #: 565-19 Overwintering puparium, lateral.

Additional Images

[?] Top

Image #: 565-06 Inhabited stem, backlit, showing larva under epidermis.

Image #: 565-12 In this view the larva is visible at an oblique angle as a slightly raised area in the flat face of the stem, above center.

Page created: April 8, 2026. Last update: April 8, 2026