Supernumerary nymph

Methoprene, when topically applied to newly emerged 5th-stage 0. fasclatus, shortens the duration of the 5th stadium by approximately 36 hours, causes supernumerary nymph formation, and accelerates the onset of molting hormone secretion (18). Two of these phenomena, i.e., shortening of the 5th stage and supernumerary nymph formation, were readily observed for 5 in morphogenetic... 

In 1966, Bowers isolated the paper factor from A. balsamea, and identified it as juvabione (60, Figure 3.2).2 Administration of 5 pg of juvabione (60) to a fifth instar larva of P. apterus inhibits its normal moulting to the adult, and generates a sixth instar supernumerary nymph.2 The acid obtained by... 

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