Woolly Stem Gall Midge
Asphondylia floccosa

This midge induces large, white, cotton-like gall masses on stems of allscale saltbush, spiny saltbush, and shadescale. Galls cover most of one side of a branch and sometimes completely encircle it.

Hosts:
Atriplex polycarpa
Atriplex confertifolia
Atriplex spinifera

Range:
CA, AZ

Large, woolly stem gall [on A. polycarpa] not covered with small leaf clusters...Asphondylia floccosa Gagné
Masses of galls are 0.5–1.5 cm in diameter on apices of plants in the summer and are 1–10 cm in diameter and farther down on the plant in winter. They are monothalamous or polythalamous, white, sometimes pink basally...