##  [Hemlock Woolly Adelgid](/resource/hemlock-woolly-adelgid) 

Organization

[Natural Resources Canada (NRCan)](/organization/natural-resources-canada-nrcan)

[2 Billion Trees (2BT)](/organization/2-billion-trees-2bt)

 

 

Project

[Great Lakes Forestry Centre](/project/great-lakes-forestry-centre)

 

Resource Type

[Fact sheet](/taxonomy/term/34)

 

 

Author(s)

V. Fewster

Chris MacQuarrie

Jeffrey Fidgen

 

 

Original Authors

V. Fewster

Chris MacQuarrie

Jeffrey Fidgen

 

 

Resource Date:

2021

 

Page Length

2

 

 

The hemlock woolly adelgid (*Adelges tsugae*) is an introduced pest of hemlock trees in eastern Canada and the eastern United States. Hemlock woolly adelgid is also present in British Columbia but is a native species there and not a significant pest. The insect causes damage by eating the contents of a tree’s nutrient storage cells. This reduces the health of trees and causes buds to die and needles to turn yellow. Tree death can occur in 5-15 years after a tree is infested. This publication describes the biology, impact and management options for hemlock woolly adelgid in Canada.