Noxious species are species that landowners must control to prevent from spreading. These non-native species are already widely distributed in Alberta that have significant economic or ecological impact and can spread easily from existing infestations onto adjoining properties. Relatively easily controlled in small numbers, they can become unmanageable if left uncontrolled and can have a significant impact when abundant.

The following Noxious species are administered by the Weed Control Act:

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