Figure 2 from: Zwölfer H, Böheim M, Beck E (2015) Eurytoma serratulae and E. robusta (Hymenoptera, Eurytomidae): complementary host exploitation strategies of coexisting parasitoids and their impact on the host Urophora cardui. Journal of Hymenoptera Research 42: 47-62. https://doi.org/10.3897/JHR.42.8847

Figure 2 - Average frequency of Eurytoma serratulae (black) and Eurytoma robusta (white) larvae as function of cell numbers per gall. Analysed material: 260 gall samples with a total of 7,064 galls collected from 1976 to 1993 in eastern France, southern Germany and eastern Austria