The diameter (mm) of 40 goldenrod galls collected at the Brown Family Environmental Center in 2002. Wasp larvae infected 100% of the galls less than 16 mm in diameter.

For galls with surviving flies
Mean = 19.82 mm
Variance = 5.44

18.13 18.97 13.49 15.70
13.84 22.64 19.28 24.81
18.04 14.56 17.69 14.17
24.85 22.55 20.78 18.67
20.64 15.39 19.41 20.51
14.15 21.90 21.82 18.61
18.24 18.40 17.46 20.18
19.95 18.32 12.35 17.56
17.16 19.47 25.47 16.12
18.44 20.06 17.59 20.61