Stem wasp
Tetramesa
insectView on iNaturalist
Parasitic wasp targeting grass stems; minute and cryptic. Biological control of grass stem pests; beneficial for native grass gardens.
Plants that support Stem wasp
2 plants
Creeping Wildrye
Elymus triticoides
grass
Larvae develop in grass stems; adults emerge summer-fall
Bay Area native
Giant Wildrye*
Elymus condensatus
grass
parasitoid of grass stem-boring insects; multiple generations per season
Bay Area native