Canadian Forest Service Publications

Province of Quebec forest insect survey. 1960. Martineau, R. Annual Report of the Forest Insect and Disease Survey 1960: 35-40.

Year: 1960

Issued by: Laurentian Forestry Centre

Catalog ID: 15614

Language: English

Availability: PDF (download)

Mark record


Forest Insect Survey activities in Quebec were continued on the same basis as the past five years with the activities related directly to spruce budworm conditions or to specific research projects of the Laboratory. The field season was not particularly favourable for insect development; spring came early but weather remained relatively dry throughout most of the summer with the exception of two weeks in July. Conditions returned to normal in September.

No important change was recorded in the spruce budworm situation and the population level remained low except in certain residual outbreak areas where insect numbers increased markedly. The Swaine jack-pine sawfly was less abundant in several outbreak areas but new increases were recorded in some localities of the Lake St. John region. The larch sawfly is presently the most important forest insect in Quebec; some decrease in numbers was recorded in the western regions but medium to severe infestations are now relatively common in central Quebec. The status of the European spruce sawfly is comparable to that of 1959. In contrast, the fall webworm has increased considerably and was found more commonly south of the St. Lawrence River. The appearance of the gypsy moth in southern Quebec in sufficient numbers to necessitate aerial spraying was also unusual. In 1960, the Quebec Laboratory again participated in a co-operative egg survey in southern Quebec. An area of 2,100 square miles was covered and new areas of infestation were found which may require spraying in 1961.

This report summarizes the various conditions observed by the Survey staff and the research officers of this Laboratory. The information received from the various project leaders is gratefully acknowledged.