Emerald Ash Borer Response Continues at Rattray Marsh Conservation Area

Monday, February 22, 2021 by Credit Valley Conservation


Credit Valley Conservation (CVC) is continuing its Emerald Ash Borer Restoration Project at Rattray Marsh Conservation Area in Mississauga. Work will take place from February 22 to March 13, 2021.

Ash trees at Rattray Marsh have been devastated by emerald ash borer (EAB), an invasive insect.

“Dead or dying ash trees are unstable and can fall,” said Aaron Day, Program Manager, Forestry at CVC. “They pose a safety risk to visitors and are a threat to forest health. We are continuing to remove dead standing ash trees in priority sections of the forest.”

CVC staff will also be restoring these sections to prevent invasive plants from filling the gap left by dead or dying ash trees. Invasive plants have little value for native wildlife and prevent the growth of natural, healthy forests. Staff will continue their work to prevent the growth of invasive plants throughout the summer and fall and plant native trees and shrubs where needed.

“In line with forest restoration best practices, we will not be removing all ash trees. Some of the smaller trees, select mature trees, and most of the cut logs will be left to provide habitat for wildlife,” said Day.

Since 2014, CVC staff have been injecting select ash trees on its properties with TreeAzin, an environmentally safe bio-insecticide treatment that helps protect healthy ash trees from becoming infected with EAB. This treatment will continue over the next 10 years for ecologically significant trees and where funding allows.

For more information, visit or email

Credit Valley Conservation (CVC) is a local conservation authority established by the Ontario government in 1954 to protect, restore and enhance the natural environment of the Credit River Watershed. Our watershed is defined by the area of land where all rainfall, snowmelt and runoff drain into lands and waters flowing into the Credit River. CVC creates connections between people and nature, knowledge and action. We inspire a deep appreciation for the role of nature in keeping people connected, healthy and happy. CVC is a member of Conservation Ontario.


Media Contact
Baljit Seran
Specialist, Marketing & Communications
Credit Valley Conservation

COVID-19 related service changes
Data and information released from Credit Valley Conservation (CVC) are provided on an 'AS IS' basis, without warranty of any kind, including without limitation the warranties of merchantability, fitness for a particular purpose and non-infringement.

Availability of this data and information does not constitute scientific publication. Data and/or information may contain errors or be incomplete. CVC and its employees make no representation or warranty, express or implied, including without limitation any warranties of merchantability or fitness for a particular purpose or warranties as to the identity or ownership of data or information, the quality, accuracy or completeness of data or information, or that the use of such data or information will not infringe any patent, intellectual property or proprietary rights of any party. CVC shall not be liable for any claim for any loss, harm, illness or other damage or injury arising from access to or use of data or information, including without limitation any direct, indirect, incidental, exemplary, special or consequential damages, even if advised of the possibility of such damages.

In accordance with scientific standards, appropriate acknowledgment of CVC should be made in any publications or other disclosures concerning data or information made available by CVC.