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Filtering by: Date issued sim 1983-08-29 Subject Douglas fir -- Diseases and pests

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Creator:

Waddell, Karen L.

Abstract:

Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...

Resource Type:

Masters Thesis