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INDUCTION OF SEXUAL MATURITY IN THE WHITE PINE WEEVIL, PISSODES STROBI (COLEOPTERA: CURCULIONIDAE), BY SOME ANALOGUES OF JUVENILE HORMONE1

Published online by Cambridge University Press:  31 May 2012

Arthur Retnakaran
Affiliation:
Insect Pathology Research Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario

Abstract

Topical application of three analogues of juvenile hormone, ZR-515 (isopropyl 11-methoxy-3,7,11-trimethyldodeca-2,4-dienoate), ZR-777 (prop-2-ynyl 3,7,11-trimethyldodeca-2,4-dienoate), and JH-25 (7-ethoxy-1 (p-ethylphenoxy)-3,7-dimethyl-2-octene) to pre-diapause adults of the white pine weevil, Pissodes strobi (Peck), induced ovarian development and resorption of fat bodies. Control of this species by hormonal induction of reproductive maturity and related metabolic alterations at the onset of winter is suggested.

Résumé

L’application topique de trois substances analogues à l’hormone juvénile, nommément le ZR-515 (isopropyle 11-méthoxy-3,7,11-triméthyledodéca-2,4-diénoate), le ZR-777 (prop-2-ynyl 3,7,11-triméthyledodéca-2,4-dienoate) et le JH-25 (7-éthoxy-1 (p-éthyléphénoxy)-3,7-diméthyle-2-octène) sur des adultes sexuellement non matures du charançon du pin blanc, Pissodes strobi (Peck), avant la diapause, induisit le développement des ovaires et la résorbtion des matières grasses. L’auteur suggère que cet insecte soit réprimé au début de l’hiver par l’induction hormonale de la maturité sexuelle, et autres proches altérations métaboliques, ce qui produirait la mortalité hivernale.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1974

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