🇺🇸 In the USA, usually spelled hemlock wooly adelgid.

Part of 🐜︎🐛︎ true bug  order Hemiptera in 🐞︎🐛︎🐜︎🐝︎ insect  class Insecta.

Native to East Asia.   Invasive > learn+quiz Invasive > 🇨🇦 🇺🇸 Canada+USA Invasive > report it! Invasive > Michigan Invasive > more info in Michigan   Inv. summary sheet  Adobe Acrobat Reader file (page 4)

🚼︎ For kids!  This insect described in invasive species placemat  Adobe Acrobat Reader file series.

Uses by native peoples
(Ethnobotany database)

HWA feeds by sucking sap from hemlock  genus Tsuga and spruce  genus Picea trees.

In eastern 🇨🇦 🇺🇸 North America, HWA has destroyed large forests, and threatens other forests, of eastern hemlock  Tsuga canadensis and Carolina hemlock  Tsuga caroliniana.

In addition to How to treat hemlock trees for hemlock woolly adelgid, this author has heard of preventative measures and treatments:

  • foliar-spray, using a horticultural mineral oil (short-term), and
  • insecticide-injection, using one of a couple different insecticides (said to protect the tree for 5–7 years).

Learn more about hemlock woolly adelgid (HWA) Adelges tsugae

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