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A Six-Year Plot Study on Douglas-Fir Cone Insect Population Fluctuations

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From 1957 to 1962 records were obtained on cone production, insect-caused damage to cones, and cone-insect populations in four plots of Pseudotsuga menziesii (Mirb.) Franco on Vancouver Island, British Columbia. Cone crops and insect populations varied extremely. In order of importance Contarinia oregonensis, C. washingtonensis, Barbara colfaxiana and Megastigmus spermotrophus were the main seed-destroyers. Apart from availability of cones, the phenomenon of diapause was probably the most important single factor affecting insect population fluctuations.

Document Type: Journal Article

Affiliations: Stationed at the Forest Entomology and Pathology Laboratory Victoria, B.C.

Publication date: 1964-03-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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