If you have elm trees, you can start pruning them again. The annual ban on pruning ends as of September first. The province says the ban is in place to reduce the risk of spreading Dutch Elm Disease. It’s a fungus that kills the trees. The elm bark beetle that carries the fungus is most active during the ban period. Fresh cuts from pruning can attract the beetles. Regular pruning helps keep the trees healthy and less vulnerable to diseases.

Whether you choose to prune your trees yourself or hire someone, it’s important to do the job properly. If done incorrectly, pruning can damage your trees and spread DED and other diseases. Under provincial regulations, individuals pruning elm trees commercially must have completed a recognized training program or be under the supervision of someone who has completed the program.
It is illegal to transport, store or use elm firewood, as the wood can carry the beetles that spread DED. Dispose of elm wood promptly using the method and location approved by your local municipality. To find out more about proper elm wood disposal in your area, check with your local municipal authority.
For more information, or if you suspect an elm tree may have DED, call the Ministry of Environment’s Inquiry Centre at 1-800-567-4224.