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Notes on the Juniper Berry Mite, Trisetacus quadrisetus (Thomas) (Acarina: Eriophyidae), in British Columbia1

Published online by Cambridge University Press:  31 May 2012

C. V. G. Morgan  and
A. F. Hedlin
C. V. G. Morgan
Affiliation:
Entomologist, Research Station, Research Branch, Canada Deparhnent of Agriculture, Summerland, B.C.
A. F. Hedlin
Affiliation:
Forest Biologist, Forest Biology Laboratory, Research Branch, Canada Department of Agriculture, Victoria, B.C.
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Extract

The juniper berry mite, Trisetacus (Eriophyes) quadrisetus (Thomas), was unknown in Canada until 1956, when its occurrence was noted on Rocky Mountain juniper, Juniperus scopulorum Sarg., in the Tzouhalem Indian Reserve near Duncan on Vancouver Island, B.C.; it has not been found elsewhere in the Province (Fig. 1). Material was first submitted to the authors by Mr. W. G. Ziller, Forest Biology Laboratory, Victoria, B.C. Each year almost the entire crop of berries on the only two trees in the area is destroyed by the mite; these trees are 30 and 50 feet high. In 1956 and 1957, no normal berries were observed. In 1959, only four healthy berries were found amongst 715 examined from the two trees. Such a heavy infestation indicates that seed production by these trees was practically eliminated since feeding by the mite destroys the seed.

Type
Articles
Information
The Canadian Entomologist , Volume 92 , Issue 8 , August 1960 , pp. 608 - 610
Copyright
Copyright © Entomological Society of Canada 1960

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References

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