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ASSOCIATION OF SCOLYTUS VENTRALIS (COLEOPTERA: SCOLYTIDAE) AND PHORADENDRON BOLLEANUM SUBSPECIES PAUCIFLORUM ON ABIES CONCOLOR1

Published online by Cambridge University Press:  31 May 2012

L. S. Felix ,
B. Uhrenholdt  and
J. R. Parmeter Jr.
L. S. Felix
Affiliation:
Department of Plant Pathology, University of California, Berkeley
B. Uhrenholdt
Affiliation:
Department of Plant Pathology, University of California, Berkeley
J. R. Parmeter Jr.
Affiliation:
Department of Plant Pathology, University of California, Berkeley
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Abstract

Attacks by Scolytus ventralis on white fir were correlated both with periods of low precipitation and with medium to heavy infestations of true mistletoe. Trees were seldom attacked when the "running mean precipitation" was above 54 in. Attacks were significantly more frequent and were often a year or more earlier on trees with substantial amounts of mistletoe. Broods were seldom produced, however.Data suggest that heavy mistletoe infestation rendered trees more susceptible to beetle infestation, possibly by creating moisture stress in infected trees.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 12 , December 1971 , pp. 1697 - 1703
Copyright
Copyright © Entomological Society of Canada 1971

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