A crown gall formed (Stoltzfus, 1966) as the larva developed. No stunting of infested plants was observed in the fall of the year but in the spring as the larvae matured rapidly the stems of infested plants were sometimes severely stunted, resulting in lack of flowering. Galls were first noticed in October when the larvae were in the second instar. By June 15 of the following year the larvae were fully grown. The first puparium was taken June 17 in northeastern Ohio. The galls form at ground level and are nearly round. They range in size from 7 to 11 mm. The larval cavity in the gall is only slightly larger than the larva. Pupariation occurs within the gall.

Crown gall on Aster simplex

- Stoltzfus, W.B.: (1977) The taxonomy and biology of Eutreta (Diptera: Tephritidae)^©