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DAILY ACTIVITY PATTERNS OF HORSE FLIES (DIPTERA: TABANIDAE: HYBOMITRA SPP.) IN NORTHERN AND SOUTHERN MANITOBA

Published online by Cambridge University Press:  31 May 2012

Paul E.K. McElligott  and
Terry D. Galloway
Paul E.K. McElligott
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
Terry D. Galloway
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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Abstract

Daily patterns of host-seeking activity by female tabanids were determined by hourly trapping (0530–2230 hours) with Manitoba horse fly traps at Seven Sisters, Man., 4 days a week, throughout the summer of 1988. Hybomitra epistates (Osten Sacken) and H. pechumani Teskey and Thomas were most active during late morning or mid-day; H. arpadi (Szilady) and H. zonalis (Kirby) in early afternoon; H. affinis (Kirby), H. illota (O.S.), and H. lasiophthalma (Macquart) in late afternoon; H. nitidifrons nuda (McDunnough) and H. lurida (Fallen) in early evening.

The morning onset of tabanid flight activity usually was related to temperature, but the cessation of activity in the evening was related either to temperature or light, depending on which was first to fall below threshold levels. Tabanid flight activity was generally low at temperatures below 20°C, although H. lasiophthalma and H. affinis occasionally were caught at 12°C. Little flight activity occurred at light intensity levels below 1000 lx regardless of temperature. At Churchill, Man., where tabanids were trapped hourly from 27 July to 15 August in 1988, H. affinis and H. frontalis (Walker) activity was low below 14°C, although some activity occurred at 6°C.

Résumé

Les patrons journaliers de rechercher les hôtes par les taons femelles ont été déterminés par échantillonnage à toutes les heures de 05h30 à 22h30 en utilisant les pièges de taons du Manitoba à Seven Sisters, Manitoba, pendant 4 jours par semaine, à l’été de 1988. Hybomitra epistates (Osten Sacken) et H. pechumani Teskey et Thomas ont été les plus actives tard le matin ou à midi; H. arpadi (Szilady) et H. zonalis (Kirby) de bonne heure l’après-midi; H. affinis (Kirby), H. illota (Osten Sacken) et H. lasiophthalma (Macquart) tard l’après-midi; et H. nitidifrons nuda (McDunnough) et H. lurida (Fallen) de bonne heure le soir.

Le commencement d’activité du vol matinal des taons a été normalement relié à la température, tandis que la cessation d’activité le soir a été reliée soit à la température, soit à la lumière, dépendant à celle qui a été la première à tomber sous le niveau du seuil. L’activité du vol des taons normalement a été base aux températures inférieures à 20°C, malgré que H. lasiophthalma et H. affinis ont été prises par occasion à 12°C. Peu d’activité du vol a eu lieu aux niveaux d’intensité de lumière plus bas que de 1000 lx, sans égard à la température. À Churchill, Manitoba, où les taons ont été relevés des pièges à toutes les heures du 27 juillet au 15 août en 1988, l’activité d’H. affinis et d’H. frontalis (Walker) a été base aux températures inférieures à 14°C, malgré que quelques activités ont eu lieu à 6°C.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 2 , April 1991 , pp. 371 - 378
Copyright
Copyright © Entomological Society of Canada 1991

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