"At least seven taxa of Solidago have been reported as hosts of E. solidaginis, including S. altissima, S. gigantea, S. canadensis, S. rugosa, S. (Euthamia) graminifolia, S. serotina (a synonym of S. gigantea), S. rugosa, and S. ulmifolia (Wasbauer 1972; Novak and Foote 1980; Ming 1989). While such reports provide some indication of the breadth of Eurosta's host preferences, our observations suggest that E. solidaginis is more narrowly oligophagous than the literature indicates. The two principal host plants of E. solidaginis are S. altissima and S. gigantea; both are putative members of the S. canadensis species complex (pers. obs.).
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Solidago altissima L. (syn. S. altissima var. scabra), late goldenrod, is the ancestral and primary host plant of E. solidaginis throughout the eastern portions of its range (Abrahamson, McCrea, and Anderson 1989; Waring, Abrahamson, and Howard 1990; Craig et al. 1993; Brown et al. 1995; Brown, Abrahamson, and Way 1996).
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Solidago gigantea Ait. (syn. S. serotina, S. shinnersii), tall goldenrod, is a common but derived host plant of E. solidaginis across northern portions of the gallmaker's distribution (Waring, Abrahamson, and Howard 1990; Craig et al. 1993; Brown et al. 1995; Brown, Abrahamson, and Way 1996).
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Other species identified as hosts of E. solidaginis are less frequent hosts (pers. obs.). Solidago canadensis L. (syn. S. scabra, S. pruinosa), Canada goldenrod, is an occasional host plant of E. solidaginis in northern portions of its range (pers. obs.) and has supported gall formation by E. solidaginis in a greenhouse study (Abrahamson, McCrea, and Anderson 1989). Miller (1959) suggested that early reports of E. solidaginis galls on this goldenrod may have been due to confusion of S. canadensis and S. altissima.
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Solidago rugosa Mill., rough-stemmed goldenrod; S. ulmifolia Muhl., elm-leaved goldenrod; and S. (Euthamia) graminifolia (L.) Nutt. (syn. Chrysocoma graminifolia, S. lanceolata, S. nuttallii), grass-leaved goldenrod have been reported to be hosts for E. solidaginis. We have never observed galls on the latter two taxa and only very infrequently seen them on S. rugosa."