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Sexual differences in foraging on corn of adultLabidura riparia [Derm.: Labiduridae]

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Abstract

A significantly greater number of adult femaleLabidura riparia (Pallas) was found foraging on corn (male: female, 1:4.16) than were expected from the male: female ratio (1:1.63) caught in pitfall traps. Nymphs reared to adulthood from both corn plants and pitfall traps indicated nymphs forage without respect to sex.

Adult female earwigs killed significantly moreDiabrotica balteata Le Conte adults than did male earwigs at 2 higher diet levels of a functional response experiment. This apparent requirement of the female for more food than the male is offered as an explanation of the differences in their foraging activity.

Résumé

On a observé un nombre sensiblement plus important de femelles adultes deLabidura riparia (Pallas) se nourrissant sur le maïs (mâle: femelle, 1:4.16) que la proportion mâle: femelle (1: 1.63) des individus capturés dans les pièges ne le laissait prévoir.

D'après l'élevage de nymphes jusqu'à l'âge adulte sur des plantes de maïs et d'après les captures dans des pièges, il apparaît que les nymphes se nourrissent sans considération de sexe.

Les forficules femelles adultes ont tué sensiblement plus d'adultes deDiabrotica balteata Le Conte que les forticules mâles au cours d'une expérience de réponse fonctionnelle à deux niveaux d'alimentation élevés. Ce besoin apparent de plus de nourriture de la femelle est fourni comme explication des différences dans son activité alimentaire par rapport au mâle.

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References

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Authors and Affiliations

  1. Agricultural Research and Education Center, University of Florida, 18905 S. W. 280th Street, 33031, Homestead, Florida, USA

    V. H. Waddill

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  1. V. H. Waddill
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Additional information

Florida Agricultural Experiment Station Journal Series No. 860. I thankJoe Lathan andWhitaya chaisit for their assistance with this study.

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Waddill, V.H. Sexual differences in foraging on corn of adultLabidura riparia [Derm.: Labiduridae] . Entomophaga 23, 339–342 (1978). https://doi.org/10.1007/BF02373050

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  • DOI: https://doi.org/10.1007/BF02373050

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