Caution | State of Local Emergency declared

The City has declared a State of Local Emergency to respond to the COVID-19 pandemic. Wear a mask and get vaccinated.

COVID-19 Information Get vaccinated

Tree pests and diseases

There are many different pests or diseases that can infest Calgary's urban forest. Some are beneficial to the trees, but many are not.

Below is a list of the more common pests and diseases that can occur in Calgary's trees:

​Dutch elm disease is a fungus spread in elm trees by the elm bark beetle. Alberta is DED-free and works diligently to stay that way.​​

​​​Learn more about common pests in Calgary​

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