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Influence of Host Presence, Age and Mating on the Calling Behaviour of Female Earias Vitella (Fabricius) (Lepidoptera: Noctuidae)

Published online by Cambridge University Press:  19 September 2011

Ashok J. Tamhankar
Ashok J. Tamhankar
Affiliation:
Nuclear Agriculture Division, Bhabha Atomic Research Centre, Trombay, Bombay 400085, India
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Abstract

The influence of host presence, age and mating on calling behaviour of the female spotted bollworm, Earias vittella, was studied under a 14L:10D photoperiod. Onset of calling was earlier in the presence of a host and 93% of the females initiated calling in its presence on day one after emergence, compared to 67% in its absence. A majority of the females initiated calling during the 10th hour of the first scotophase and thereafter the initiation shifted to earlier hours as age advanced. Females generally called longer in the presence of a host. The mean time spent in calling, from the 1st to the 10th day increased from 56 to 152 min in the absence of a host, and from 77 to 234 min in its presence. Most of the females resumed calling after mating, but the mated females exhibited a significant reduction in calling performance when compared with the virgin females.

Résumé

L'influence de l'accessibilité à l'âge de l'hôte et à l'accouplement sur le comportement de l'appel sexuel de la femelle du vera taché, Earias vittella a été étudiée à une photopériode de 14 heures d'éclairement et de 10 heures d'obscurité. Le commencement de l'appel était plus tôt en présence de l'hôte et 93% des femelles ont commencé l'appel le jour après leur émergence par rapport à 67% en absence de l'hôte. La plupart des femelles ont commencé leur appel pendant la dixième heure de la scotophase et après cela, le commencement de l'appel était aux heures plus tôot, selon l'âge avancé de la femelle. En générale, l'appel des femelles a duré plus longtemps en présence de l'hôte. Comme l'âge s'est avancé de l'émergence jusqu'aux dix jours, la durés moyenne de l'appel s'est accrue de 56 min à 152 min en absence de l'hôte et de 77 min à 234 min en sa présence. La plupart des femelles accouplées se sont remises à l'appel sexuel, mais elles ont montré une réduction significative de cette activité par rapport aux femelles vierges.

Keywords

Spotted bollwormEarias vittellahostokraagematingcallingVera tachéEarias vittellahôteokraâgeaccouplementappel sexuel
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 15 , Issue 3 , June 1994 , pp. 275 - 280
Copyright
Copyright © ICIPE 1994

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