DISTRIBUTION AND EXCRETION OF JUVENOID IN THE LOCUST LOCUSTA-MIGRATORIA-MIGRATORIOIDES (R-ET-L) (ORTH, OEDIPODINAE)

The distribution and the excretion rate of topically administered H-3 and C-14-labelled juvenoids, derivatives of 2-(4-hydroxybenzyl)-1-cycl oalkanone were analyzed in the last instar nymphs and imagoes of the A frican migratory locust, Locusta migratoria migratorioides. It was fou nd that the main process of elimination of juvenoid is the excretion. About 80% of the total applied label was excreted within the first 2 d ays after topical application. The maximum quantity of the topically a pplied juvenoid penetrated in the locust body within the first 2 days after application. However, the administered juvenoid was deposited in cuticle for a long time. It was found that 7-8% of the total applied label was deposited in cuticle (exuvies) that have been casted off aft er 12 days from application. In the other analysed organs (brain, fat body, thoracic muscles, intestine, gonads, haemolymph) only a small pa rt of the administered radioactivity was found.