HEAVY-METALS AND FLUORINE INFLUENCE ON ARYLPHORIN SYNTHESIS IN THE CABBAGE MOTH (MAMESTRA-BRASSICAE, LEPIDOPTERA, NOCTUIDAE)

Semisynthetic diet contaminated by Cd, Pb, Cu and F was administered t o cabbage moth larvae: a) on a single occasion, after moulting to the sixth instar b) continually, from the fourth instar onwards. Changes o f the arylphorin concentration in the haemolymph of larvae and pupae w ere determined by means of ELISA. Toxic diet significantly reduced the arylphorin concentrations in the haemolymph of larvae (except of thos e continually fed on F and a lower concentration of Cu). There were no significant differences in the haemolymph arylphorin concentrations o f pupae, the larvae of which had previously received a single dose of toxic feed. On the other hand, the arylphorin concentrations of pupae with larvae under continual toxic pressure were significantly lower (C d) or higher (Cu).