Observations of the gallery habits of Trypodendron retusum (Coleoptera: Scolytidae) infesting aspen in central Michigan

Authors

S.D. Brewer
R.A. Beck
R.A. Roeper

Document Type

Article

Journal/Book Title/Conference

Great Lakes Entomologist

Volume

21

Issue

1

First Page

5

Last Page

8

Publication Date

1988

Abstract

A monogamous pair of adult Trypodendron retusum construct a gallery system consisting of an entrance tunnel and from two to five lateral tunnels into the sapwood of aspen. Inoculation of the mutualistic fungus Ambrosiella ferruginea by the female beetle, was followed by oviposition in shallow egg cradles. Two instars were observed as the larvae enlarged their cradles. The number of cradles per gallery system was correlated to the length of the gallery system. Progeny adults with a sex ratio of approximately 1:1 emerged from late June to early August to overwinter in the litter.

Recommended Citation

Brewer, S. D.; Beck, R. A.; Roeper, R. A. 1988. Observations of the gallery habits of Trypodendron retusum (Coleoptera: Scolytidae) infesting aspen in central Michigan. Great Lakes Entomologist. 21 (1): 5-8.