Effects of juvenile hormone i, methoprene and kinoprene on development of the hymenopteran parasitoid nasonia vitripennis
1979
LOOF, A. | LOON, J. | HADERMANN, F.
Juvenile hormone I, methoprene and kinoprene were applied to almost all developmental stages of Nasonia vitripennis, a hymenopteran parasitoid particularly of Diptera. JH I has ovicidal activity, and may arrest postembryonic development in the first larval instar. If applied to larvae and pupae, the three compounds may cause a wide range of effects: arrestment of development in the last larval instar, any pupal or pharate adult stage; incomplete coloration of the adult cuticle; and most commonly, disruption of normal eclosion. None of the compounds induced diapause in the last larval instar. Kinoprene is a very potent inhibitor of eclosion, even if applied to completely black pharate adults. Depending upon the compound used, the time lapse between the treatment of Sarcophaga and parasitation, and the developmental stage of Nasonia which is taken as a reference, the parasitoids inside a puparium of Sarcophaga bullata tolerate a dose which is 80 to more than 5,000 times higher than that tolerated after being removed from a fly puparium. JH I and methoprene are less toxic to Nasonia than to Sarcophaga.
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