Animalia > Arthropoda > Insecta > Hemiptera > Adelgoidea > Adelgidae > Adelges > Adelges tsugae

Adelges tsugae

Synonyms: Adelges tsugae; Aphrastasia tsugae; Aphrastasia tugae

Wikipedia Abstract

Hemlock woolly adelgid (Adelges tsugae), or HWA, is member of the Sternorrhyncha suborder of the Order Hemiptera and native to East Asia. It feeds by sucking sap from hemlock and spruce trees (Tsuga spp.; Picea spp.). In eastern North America, it is a destructive pest that gravely threatens the eastern hemlock (Tsuga canadensis) and the Carolina hemlock (Tsuga caroliniana).
View Wikipedia Record: Adelges tsugae

Invasive Species

Adelges tsugae is a small, aphid-like insect that has become a serious pest of eastern hemlock and Carolina hemlock. The most obvious sign of infestation is the presence of white, woolly egg masses on the underside of hemlock needles. Infested eastern North American hemlocks defoliate prematurely and will eventually die if left untreated. A. tsugae is a difficult insect to control as the white waxy secretion protects it from pesticides. It is dispersed to new habitats through the nursery trade and locally by wind, birds, mammals and humans. Hemlock trees provide important habitats for many wildlife species and A. tsugae has severe adverse ecological impacts which will become more severe as its distribution expands.
View ISSG Record: Adelges tsugae

Prey / Diet

Tsuga canadensis[1]


Parasite of 
Tsuga canadensis (Canada hemlock)[1]



Attributes / relations provided by
1Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
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