Canadian Forest Service Publications

Storage and retrieval of quantitative British Columbia-Yukon forest insect and disease survey records. 1976. Harris, J.W.E. Government of Canada. Department of the Environment. Canadian Forest Service, Pacific Forest Research Centre, Victoria, BC. Information Report BC-X-120.

Year: 1976

Issued by: Pacific Forestry Centre

Catalog ID: 3981

Language: English

Series: Information Report (PFC - Victoria)

Availability: PDF (request by e-mail)

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The Forest Insect and Disease Survey, established in 1936, and now part of of the Canadian Forestry Service, Department of the Environment, collects and interprets data on forest pest populations for the benefit of forest land managers. These data are used for current population and damage prediction, and are stored on a computer file for possible future analysis.

The most complete and extensive long-term records are on defoliating insects, for which there has been a standard collecting technique applied since 1949, at established sampling points throughout the Province. The methods of data collection and retrieval are described in this report. Data are extracted by computer programs which a) list in several formats: by collection, pest species and locality; b) print pest population and sample distribution listings and maps; c) calculate and summarize insect population measures such as average number of insects per sample and % positive samples. These measures, for any insect pest, host tree and geographic location, can be plotted and compared. Methods of access to Atmospheric Environment Service weather data were also developed and the data can be print-plotted.