Canadian Forest Service Publications
Répartition géographique et intensité du dépérissement de l'érable à sucre dans les érablières du Québec. 1985. Lachance, D. Phytoprotection 66 : 83-90.
Issued by: Laurentian Forestry Centre
Catalog ID: 14593
Availability: PDF (request by e-mail)
A survey of maple decline in Québec was made in 257 sugar bushes in 1983. The decline was present throughout the range of sugar maple but it was more frequent and severe in the census divisions of Beauce, Mégantic and Frontenac. Damages were estimated as light in 35% of the bushes surveyed, moderate in 11% and severe in 6%. A significative relationship was found between the severity of the decline and the elevation of the sites above sea level. No relationship was detected decline and slope exposition, presence of the sugar maple borer, maple tapping, or sap collection methods. Larger trees show more decline than smaller ones and the shoestring fungus is more common on trees most affected by the decline. Possible causes of this maple decline are discussed.