Canadian Forest Service Publications
Province of Quebec forest insect survey. 1959. Martineau, R. Annual Report of the Forest Insect and Disease Survey 1959: 36-40.
Issued by: Laurentian Forestry Centre
Catalog ID: 15612
Availability: PDF (download)
The general conduct of forest insect surveys in Quebec again followed the pattern adopted in 1955. Favourable early spring weather started insect activity much earlier than usual but a period of cold, dry weather soon brought seasonal insect development back to normal.
The spruce budworm continued to decline in 1959 and serious defoliation was recorded only in very restricted areas, particularly in the Lower St. Lawrence and Gaspé regions. The special aerial and ground surveys conducted for several years in connection with the aerial spray program, were discontinued. The Swaine jack-pine sawfly increased in abundance, particularly in parts of the St. Maurice watershed where special surveys were conducted this year. No appreciable change has been reported in other infestation areas. The larch sawfly is becoming abundant over a wider area each year; in 1959 outbreak conditions extended from the Abitibi district eastward through the central regions of Quebec. Numbers of the European spruce sawfly also increased in 1959 and it is now fairly common in several regions. Other forest insects mentioned in this report, are associated with projects of the Laboratory or are of particular interest to the Survey. The information received from various project leaders and the collections submitted by cooperators are gratefully acknowledged.