Fig. 1

The effect of parasitoid wasp exposure on lamellocyte differentiation and the melanization of oil droplets. A Concentration of lamellocytes in the hemolymph of unchallenged larvae and larvae 48 h postinjection with oil or oil + wasp homogenate. The data points are independent measurements of hemolymph pooled from 8 to 10 larvae. B Oil droplets injected into larvae are either melanized (arrow) or not. Melanization of the cuticle resulting from injection wounding is often visible (arrowhead). C Proportion of larvae with melanized oil droplets 48 h after different immune challenges. Different letters represent treatments with statistically significant differences (Tukey’s honest significant difference test, p < 0.01)