Emergence and orientation behavior of brood <i>Trypodendron lineatum</i> (Coleoptera: Scolytidae)

Authors

  • J. H. Borden Pestology Centre Department of Biological Sciences Simon Fraser University Burnaby, B.C.
  • C. E. Fockler Pestology Centre Department of Biological Sciences Simon Fraser University Burnaby, B.C.

Keywords:

<i>Trypodendron lineatum</i>, Coleoptera, Scolytidae

Abstract

Emergence of <i>Trypodendron lineatum</i> from caged naturally infested host logs occurred from June 2 to August 27, 1969. Approximately 30% of the parent beetles emerged before June 30, when the first major brood emergence took place. The sporadic brood emergence was apparently influenced by maturation, and markedly by environmental temperature, A daily emergence. A total of 6,539 beetles emerged, with a male:female sex ratio of 0.997. Emergent brood beetles were hygronegative and strongly photopositive, indicating that behavioral reversals in both humidity and photic responses must occur since the beetles select and occupy moist, dark overwintering sites.

References

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Published

2019-08-28

Issue

Vol. 70 (1973): Journal of the Entomological Society of British Columbia

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Articles

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