The City of Edmonton has confirmed that an elm tree removed in October from the Glengarry neighbourhood has tested positive for Dutch elm disease (DED), the second confirmed case in 2025. City arborists inspected a declining tree in October and decided to remove it, the City of Edmonton said in a Wednesday news release. The tree initially tested negative for DED, but fungal collections from the tree appeared to match DED under a microscope and were submitted for more tests, where the results confirmed DED. A total of seven trees have tested positive since August 2024, when the disease was first detected. …Elm trees make up nearly 22 per cent of Edmonton’s boulevard and open-space trees, with an estimated population of around 90,000 trees. The city has conducted 185,510 visual surveys and submitted 57 samples for testing this year.