Canadian Forest Service Publications

Forest insect and disease conditions, Prince Rupert District, 1974. 1974. Andrews, R.J.; Erickson, R.D. Environment Canada, Forestry Service, Pacific Forest Research Centre, Victoria, BC. Information Report BC-X-115. 15 p.

Year: 1974

Issued by: Pacific Forestry Centre

Catalog ID: 1428

Language: English

Series: Information Report (PFC - Victoria)

Availability: Order paper copy (free), PDF (download)

Mark record


Mountain pine beetle and blackheaded budworm continued to cause extensive damage to forest stands in the Prince Rupert Forest District. Mountain pine beetle attacks on lodgepole pine ranged from Ritchie east to the Burns Lake area, with notable expansion in the areas between Houston and Kitwanga. Blackheaded budworm damage increased from 281 000 acres in 1973 to 316 000 acres in 1974. Populations were sporadic south of Ocean Falls but increased between Ocean Falls and Terrace. Black army cutworm infestations declined in conifer plantations in the interior portion of the District.

A shoot blight damaged advanced western hemlock regeneration from Kitimat to Nass River, and was found for the first time on western hemlock and Sitka spruce on the Queen Charlotte Islands. Other significant diseases in the District were: a spruce needle rust and a spruce needle cast, globose gall rust and a leaf and twig blight.

The 1974 special surveys for mountain pine beetle and western blackheaded budworm were conducted with the much valued co-operation of the British Columbia Forest Service, Eurocan Pulp and Paper Company Limited and Rayonier of Canada Limited.