Effects of Adult Temperature on Male Mating Success in the West Indian Sweetpotato Weevil, Euscepes postfasciatus (Coleoptera : Curculionidae)

    • Moriya Seiichi MORIYA Seiichi
    • Okinawa Prefectural Agricultural Experiment Station:(Present address)Insect Ecology Laboratory, Department of Entomology and Nematology, National Agricultural Research Center

Abstract

To examine the possibility that mating continues in the winter in Okinawa, we observed the effects of adult temperature on male mating success in Euscepes postfasciatus. Males kept at 15℃ for the first 30 or 60 days of adulthood had much lower mating rates than those kept at 25℃ when paired with females at 25℃. However, when males were first kept at 25℃ for 30 days and then exposed to 15℃ for the next 30 days, they showed a high mating rate even when paired with females at 15℃, although the rate rapidly decreased with time. This indicates that 1) mating activity itself was not inhibited at 15℃ and that 2) sexually mature males retained the inseminating ability even after a period of cool conditions. The possibility that sperm is quickly depleted after several matings at a spermiogenesis-suppressing temperature was pointed out to explain the present results. This and other laboratory studies suggest the occurrence of mating in the winter highly likely on Okinawa Island, and point out the importance of release of sterile insects in all seasons including winter in eradicating this pest.

Journal

Entomological science   [List of Volumes]

Entomological science 4(3), 265-269, 2001-09-25  [Table of Contents]

The Entomological Society of Japan

References:  24

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Codes

  • NII Article ID (NAID) :
    110003374745
  • NII NACSIS-CAT ID (NCID) :
    AA11217633
  • Text Lang :
    ENG
  • Article Type :
    ART
  • ISSN :
    13438786
  • NDL Article ID :
    5938976
  • NDL Source Classification :
    ZR4(科学技術--生物学--動物)
  • NDL Call No. :
    Z54-J320
  • Databases :
    CJP  NDL  NII-ELS 

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