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NEUROHORMONAL INDUCTION OF PHEROMONE BIOSYNTHESIS BY HELIOTHIS ZEA (BODDIE) DURING THE PHOTOPHASE

Published online by Cambridge University Press:  31 May 2012

P.E.A. Teal  and
J.H. Tumlinson
P.E.A. Teal
Affiliation:
Insect Attractants, Behavior, and Basic Biology Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Gainesville, Florida, USA32604
J.H. Tumlinson
Affiliation:
Insect Attractants, Behavior, and Basic Biology Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Gainesville, Florida, USA32604
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Abstract

Females of Heliothis zea (Boddie) were stimulated to produce pheromone by injection of brain – subesophageal ganglion homogenates. Females injected with this homogenate during the photophase produced the same amount of pheromone and same ratio of components as neck-ligated females injected during the peak of pheromone production. Decapitated females and isolated abdomens also produced pheromone when injected with the brain – subesophageal ganglion homogenate during the photophase. These data show that the neurohormone which stimulates pheromone production is not degraded by enzymes during the photophase and that pheromone is not metabolized at a greater rate during periods when the insect is not producing pheromones.

Résumé

Les femelles d’Heliothis zea (Boddie) ont été induites à produire leur phéromone par injection d’homogénats du complexe cerveau-ganglion sou s-oesophagien. Les femelles injectées avec l’homogénat durant la photophase ont produit la même quantité de phéromone et les mêmes proportions de ses composantes que des femelles ligaturées au cou injectées durant le pic de production de phéromone. Des femelles décapitées et des abdomens isolés ont aussi produit la phéromone lorsqu’injectés avec l’homogénat durant la photophase. Ces résultats montrent que la neuro-hormone qui stimule la production de phéromone n’est pas dégradée enzymanquement durant la photophase et que la phéromone n’est pas métabolisée à un taux plus rapide lorsque l’insecte ne produit pas de phéromone.

Type
Articles
Information
The Canadian Entomologist , Volume 121 , Issue 1 , January 1989 , pp. 43 - 46
Copyright
Copyright © Entomological Society of Canada 1989

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