City warns of bronze leaf disease
Thursday, Aug 27, 2015 11:28 am
Most Airdrie residents understand the important benefits trees provide to people and our community. However, the proper way to care for the trees on private property is less well understood.
City of Airdrie Parks staff has recently noticed a large outbreak of a tree disease on privately owned trees. This disease is called ‘bronze leaf disease.’ It affects tower poplars and Swedish columnar aspens, and has the potential to kill a tree within a few seasons if left unchecked. There is concern that it could jump to our native trembling aspen tree, which could be devastating to the aspen parkland region that we live in.
•Bronze leaf disease enters through the leaves and becomes systemic after that, meaning it can spread very quickly.
•Affected branches turn a reddish/bronze colour, while the veins of the leaves remain green. Those leaves will remain on the tree well into the winter. They contain the spores that will spread to new hosts the following spring.
•Affected branches should be removed back to the trunk of the tree and pruning tools should be sanitized with bleach: water 1:10 solution between each cut.
•The diseased wood and leaves should be bagged and disposed of. Tied bags of diseased limbs can be left in your regular garbage or burnt or buried.
It is your responsibility to care for trees on your private property as per the Parks Bylaw. This includes prevention, maintenance and treatment with regards to pests or diseases considered to be contagious that could affect the health of any City tree. Should you become aware of a contagious pest or disease, it is your responsibility to treat, remove and/or dispose of it in accordance with the direction of the City of Airdrie.
For more information, please visit airdrie.ca and search for tree diseases.