Tetramesa hordei (Harris, 1830)

on Agropyron, Elymus, Elytrigia

gall

Above a node the leaf sheath is thickened, and mostly open at one side. At the inside some fusiform galls, each with a yellow larva or pupa.

host plants

Poaceae, narrowly oligophagous

Agropyron cristatum; Elymus caninus; Elytrigia intermedia & subsp. trichophora, juncea, repens.

E. repens is the most important one.

synonyms

Harmolita, Isthmosoma, hordei.

notes

In some regions outside of Europe a pest on cereal crops (“barley jointworm”).

references

Buhr (1964a), Dauphin & Aniotsbehere (1997a), Ludwig (1973a), Roskam (2019a), Tomasi (2014a).