Figure 4. Enzyme activities (U) in Folsomia candida when the collembolan was fed a pure artificial diet (negative control) or diets containing Cry1C, Cry2A, or E-64 (positive control) for 0, 7, or 14 days.

The following enzymes were analysed: (A) superoxide dismutase (SOD); (B) peroxidase (POD); (C) glutathione reductase (GR); (D)carboxylesterase (CES); (E) total proteases (T-Pro); (F) tryptase (TPS). Values are means + SE, n = 10. Asterisks indicate a significant difference between the treatment and the negative control (P < 0.05).