Tree Pests
The way the City responds to pests on public trees depends on a number of factors, including the nature of the pest, the extent of the damage, and the level of risk the pest may pose to the urban forest.
Insects feeding on trees are often merely a nuisance or unsightly and do not seriously harm the tree (see Insect Identification and Advice). Since the City avoids using pesticides as much as possible, it will not treat for these mostly cosmetic tree pests. In most cases, there are also natural controls for these minor pests (like ladybird beetles and parasitic wasps). Indiscriminate spraying would destroy these beneficial insects.
Spraying is also ineffective against certain pests, such as wood borers. Some pests can also be managed simply though pruning or other non-chemical control methods.
Harmful tree pests
The City will take action against destructive tree pests that can severely damage or kill trees. In addition to selective spraying, the City may inject pesticide directly into some trees. Although tree injections are of limited use, this method is more targeted and reduces the public's exposure to pesticides.
Notify the City if you are concerned that a public tree appears diseased or infested with an injurious pest. Pest management staff will make an assessment and decide on the best course of treatment. The City will also inspect a privately owned tree if you suspect it's being attacked by a critical invasive pest, such as Dutch elm disease or emerald ash borer.
For more information:
River Valley, Forestry and Environmental Services
12304-107 Street
Edmonton AB
T5G 2S7
Please include the address of the tree in question and provide your name and phone number to speed up processing
| Telephone | In Edmonton: 311 Outside Edmonton: 780-442-5311 |
|---|---|
| Fax | 780-496-4978 |
| citytrees@edmonton.ca |
