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The Green pages

Getting to know low-impact pesticides

Damages caused by herbicides.
Photo: Jardin botanique de Montréal (Pascale Maynard)
Damaged leaf

Although Montréal has a by-law prohibiting the outdoor use of pesticides, certain low-impact pesticides may be used at all times. Their active ingredients are considered to have low toxicity for human health and the environment.

An active ingredient is a compound that makes a pesticide effective. It may act on insects (insecticide), fungal diseases (fungicide), mites (acaricide), molluscs (molluscicide) or weeds (herbicide). To find out what active ingredient a product contains, look on the label after the "guarantee."

The following sheets list active ingredients in low-impact pesticides (this list is not exhaustive). The details found here are for information only – always check the label on any product before using it and be sure to properly identify the problem so that you can choose the appropriate product.

Low-impact pesticides:



Insecticides, acaricides and molluscicides


NB: This information is based on labels from pesticides registered for household use in Canada.

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