As part of the management of dead trees in parks and woodlots, a number of ash trees have been removed. The City will be working with a contractor to spray the stumps of the ash and invasive shrubs such as buckthorn to minimize the competition with new trees that are to be planted on the site.


Garlon RTU is applied using a backpack spray system directly to the cut surface of the buckthorn and ash stumps which greatly reduces the risk of exposure and impact on non-targeted species. The active ingredient, triclopyr, penetrates the cambium layer to prevent resprouting of the shrub.


If ingested, Garlon RTU has low toxicity; small amounts of Garlon RTU swallowed incidental to handling are unlikely to cause injury.  Long term testing has produced no evidence that triclopyr causes carcinogenic or mutagenic effects in mammals. The herbicide’s active ingredient disrupts the growth process within the plant by affecting enzymes unique to plants.


Below is the list of parks identified to receive treatment with Garlon RTU this spring.

Ward Name Address
22 River Road (East side of the road) 543 River Road
22 Heart’s Desire Forest (between end of Goodwood Drive and forest service road) 3566 Woodroffe Avenue


Note:  the treatment in the above-mentioned park should start within the next three weeks and be completed by April 27, 2018.

Internal Information:

If residents have more questions in regards to the buckthorn treatment, redirect to Cédric Bertrand at or by voicemail at extension 43223.