DIEL PATTERN OF ADULT EMERGENCE IN THE SCREW-WORM FLY CHRYSOMYA BEZZIANA (DIPTERA: CALLIPHORIDAE)

Authors

  • J. P. Spradbery,

    1. Division of Entomology, CSIRO Screw-worm Unit. P.O. Box 6712. Boroko, Papua New Guinea.
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  • D. P. A. Sands,

    1. Division of Entomology, CSIRO Screw-worm Unit. P.O. Box 6712. Boroko, Papua New Guinea.
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    • *CSIRO Long Pocket Laboratories, Private Mail Bag No. 3. Indooroopilly, Qld 4068.

  • P. Bakker

    1. Division of Entomology, CSIRO Screw-worm Unit. P.O. Box 6712. Boroko, Papua New Guinea.
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    • **CSIRO Division of Soils. Private Mail Bag. P.O. Townsville, Qld 4810.


Abstract

The diel pattern of emergence in native and artificially reared screw-worm fly. Chrysomya bezziana (Villeneuve), under a natural photo-periodic regime of LD 12:12 was described. Peak emergence was centred at dawn (0610 h) with 60%, of all emergence taking place between 0300 h and 0900 h. Less than 8% of emergence was between 1200 h and 0300 h. There was no difference in the emergence pattern of males and females or between wild and laboratory-reared flies.

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