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The effects of precocenes in grasshoppers Heteracris littoralis (Orthoptera: Acrididae)

Published online by Cambridge University Press:  19 September 2011

Hussain F. Alrubeai
Hussain F. Alrubeai
Affiliation:
Department of Plant Protection, Faculty of Agriculture and Biology, Nuclear Research Center, P.O. Box. 765, Baghdad, Iraq
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Abstract

Prococenes I or II (20–100 μg/insect) were topically applied to third instar nymphs of the grasshepper, Heteracris littoralis. Both compounds led to different degrees of precocious metamorphosis, irreversible with time, at the subsequent moults. Precocene-treated third instar nymphs gave rise to precocious adults at the following moult, though some of the nymphs responded and metamorphosed precociously in the fifth instar. Ovarian development was inhibited by precocene II. Meanwhile, juvenile hormone (20/μg/insect) restored normal ovarian development to some extent.

Résumé

Le précocène I ou II (20–100 μg/insecte) ont été localement appliqué pour nymphes au 3eme stade de Heteracris Littoralis.

Les resultats avec l'un ou l'autre composé conduit pour different metamorphose précoce, irreversible avec le temps, en subsequante mue. Bienque, la 3eme stade treatee par le précocène donne qulques adultes précoce en mue suivante, authre percentage de nymphes ă répondre et metamorphose précoceté dans la 5eme stade. L'utilisation de precocene II a montré en empêchement le developpment d'ovariane. En même temps, JH III (20 μg/insecte) a paru remettre le developpment d'ovariane jusqu'a sertain niveau.

Keywords

Heteracris littoralisprecoceneprecocious metamorphosisovarian retardationjuvenile hormone III
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 7 , Issue 4 , August 1986 , pp. 529 - 531
Copyright
Copyright © ICIPE 1986

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References

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