Publications du Service canadien des forêts

Techniques d'échantillonnage pour détecter les infestations de la canopée par le puceron lanigère de la pruche. 2021. Fidgen, J.; MacQuarrie, C.J.K.; Turgeon, J.J. Ressources naturelles Canada, Service canadien des forêts, Centre de foresterie des Grands Lacs, Sault Ste. Marie (Ontario). Frontline Note Technique 118. 4 p.

Année : 2021

Disponible au : Centre de foresterie des Grands Lacs

Numéro de catalogue : 40518

La langue : Français

Séries : Frontline - Note technique (CFGL - Sault Ste. Marie)

Disponibilité : PDF (télécharger)

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Résumé en langage clair et simple

Hemlock woolly adelgid (Adelges tsugae Annand) has recently invaded Canada and is threatening the survival of eastern hemlock. An important part of the management of the hemlock woolly adelgid is effective detection of populations while they are still small and less costly to treat. This note describes two new detection techniques: ball sampling and sticky trapping, which consistently detect low-level infestations of the adelgid. Ball sampling involves shooting a ball fitted with Velcro into the hemlock canopy to detect the ‘wool’ produced by the adelgid, whereas sticky traps intercept the mobile stage of the insect at ground level when it falls from the trees. Ball sampling and sticky trapping are most effective when at least 2% of the twigs on a tree or at least 2% of the trees in the stand have adelgids.