Stem borer (Coleoptera: Mordellidae) in Mentha

Record Details

Record no.:	0329
Feeding guild:	Stem borer
Taxonomy:	Coleoptera: Mordellidae: cf. Mordellina pustulata
Stages observed:	trace, larva, adult
Distribution observed:	IA
Hosts in Mentha:	M. cf. arvensis (wild mint)

Larvae overwinter in the stems and adults emerge in spring. I reared an adult in 2022.

Featured Images

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Image #: 329-01 Larva in stem. (Photo date: November 4, 2023)

Image #: 329-04 Exit hole in stem from adult's successful emergence. (Photo date: April 4, 2022)

Image #: 329-05 Reared adult. (Photo date: April 4, 2022)

Specimen Data for Images

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Coll. 11/03/23, photos on 11/04/23 (01-03); coll. 02/28/22, adult em. 04/03/22, photos of adult and exit hole in stem on 04/04/22 (04-10, 12) and 11/11/23 (11).

Page created: December 2, 2023. Last update: March 20, 2026