Fig. 6. Contour maps illustrating the effects of nutrient consumption on blood protein, free amino acids and trehalose concentrations (mg ml^-1) during the fifth stadium of normal unparasitized fifth instar M. sexta larvae and larvae parasitized by C. congregata, maintained over the fourth and fifth stadia on a chemically defined artificial diet having varying ratios of casein and sucrose. (A,D) Protein, (B,E) free amino acid and (C,F) trehalose concentrations of (A-C) normal unparasitized larvae and (D-F) parasitized larvae.