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Diapause of the southwestern corn borer, Diatraea grandiosella Dyar (Lepidoptera, Pyralidae): effects of a juvenile hormone mimic

Published online by Cambridge University Press:  10 July 2009

G. M. Chippendale  and
C.-M. Yin
G. M. Chippendale
Affiliation:
Department of Entomology, University of Missouri, Columbia, Missouri 65201, U.S.A.
C.-M. Yin
Affiliation:
Department of Entomology, University of Missouri, Columbia, Missouri 65201, U.S.A.
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Abstract

Topical applications of a juvenile hormone (JH) mimic induced and prolonged the mature larval diapause of the southwestern corn borer, Diatraea grandiosella Dyar. The onset of this diapause is marked by an ecdysis from a spotted to an immaculate morph. A high percentage of spotted non-diapause larvae treated with a single dose of a JH mimic moulted into the immaculate morph and became dormant. Similar treatments of diapause larvae led to a reversion to the spotted morph, but the larvae remained dormant. These results imply that diapause larvae contain an intermediate JH titre. A use for JH mimics in disrupting the seasonal phenology of pest insects with larval dormancies is suggested.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 66 , Issue 1 , March 1976 , pp. 75 - 79
Copyright
Copyright © Cambridge University Press 1976

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