Fig. 1. Salicylate levels in the haemolymph of third instar larvae fed on a salicylate-enriched diet. (A) Levels of salicylate in the haemolymph of larvae fed on a 20 mmol l^–1 salicylate-enriched diet for different periods. (B) Levels of salicylate in the haemolymph of larvae fed for 24 h on diets with different concentrations of salicylate. Each point represents the mean ± s.e.m. of 25–50 samples. The curve was fitted to the Michaelis–Menten equation by non-linear regression analysis.