spatulae of 3 larvae; from Sylvén ao (1997a)

gall

up to 4 mm large, orange larvae in sometimes very large groups within the leaf sheath, mainly just above the nodes. Locally the stem becomes darkened and soft, causing lodging of the culm. Univoltine, pupation in a cocoon in the soil.

host plants

Poaceae, monphagous

Phalaroides arundinacea.

references

Skuhravá & Skuhravý (2021a: 177), Sylvén, Hellqvist, Sellerholm & Tastás-Duque (1997a).