Canadian Forest Service Publications

Province of Quebec forest insect survey. 1961. Martineau, R. Annual Report of the Forest Insect and Disease Survey 1961: 44-48.

Year: 1961

Issued by: Laurentian Forestry Centre

Catalog ID: 15617

Language: English

Availability: PDF (request by e-mail)

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Insect development was generally retarded in 1961 due to unfavourable weather conditions through the first half of the season. The spring and early summer were unusually cool and humid with near normal conditions prevailing through late August and September.

There were no major changes in the status of important forest insects in the Province. Populations of the spruce budworm declined in several of the small infestation centres reported in 1960. The larch sawfly was again extremely abundant and although a decline in numbers was recorded in northwestern Quebec, the insect made appreciable gains in other regions. The jack-pine sawfly situation showed little change, and the European spruce sawfly was at its lowest level since 1955.

Moderate to severe infestations of the basswood looper developed in maple stands in Frontenac and Beauce counties, and the birch skeletonizer was unusually abundant in several regions. The 1961 gypsy moth egg survey revealed new infestation centres in southern Quebec and aerial spraying is anticipated for that region in 1962.

The following report of insect conditions in Quebec is based on observations by Survey personnel and other project workers at this Laboratory whose cooperation is gratefully acknowledged.