INSECTSElm Sack Gall AphidTetraneura ulmiInsectsIntroduced5 images2–3 mmLengthTrue bug in the family Aphididae 2–3 mm long. Introduced to Québec. Feeds on plants.Where to see itSimilar speciesElm Cockscomb AphidColopha ulmicolaSlippery Elm Gall AphidKaltenbachiella ulmifusaWoolly Elm AphidEriosoma americanum
