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City of Winnipeg
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Insect Control

Dutch Elm Disease

Elm Bark Beetle Control Program

Seasonally, the City of Winnipeg Insect Control Branch will treat American, Siberian and Japanese Elm trees on public and private property utilizing Pyrate® 480EC (chlorpyrifos) (Pyrate® 480EC Label / Pyrate® 480EC MSDS) weather permitting. The program is intended to control elm bark beetles, the carriers of Dutch Elm Disease (DED).

Spraying of trees will occur between the hours of 5:30 a.m. and 4:30 p.m. Monday to Friday, weather permitting. Treatment will take place in various locations throughout the city where DED has claimed American, Siberian and Japanese Elm trees. Also, as a preventative measure the City treats areas with large stands of elms on a two year rotational basis.

Treatment will be conducted utilizing Pyrate® 480EC (chlorpyrifos), which is sprayed from portable sprayers directly onto the lower 50 cm of the tree trunk. This product has been approved for use in Canada by Health Canada’s Pest Management Regulatory Agency, and will be used in accordance with federally approved label directions by licensed pesticide applicators.

Citizens can register for notifications using the following link: Elm Bark Beetle Control Program Notification.

Click here to type in your address and find out in what insect management area you reside.

Spraying Schedule - Week of September 25th, 2017 - IMAs 39, 42, 46, 50 and Brookside Cemetery

Areas to be Treated Areas to be treated  
Areas that have been Treated Areas prviously treated  




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Elm Bark Beetle Control Program Map
Elm Bark Beetle Control Program

  • Start Date: May 23rd, 2017
  • End Date:

Elm Bark Beetle Control Program Archives

2015 | 2016


Last update: September 22, 2017
Contact Us
Bugline: 311
or 1-877-311-4WPG
Media inquiries: 204-986-6000
311@Winnipeg.ca

Administrative Office and Research Laboratory
1539 Waverley Street
Winnipeg MB R3T 4V7

Operations Base
3 Grey Street
Winnipeg MB R2L 1V2
Citizens' Information Service
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to find out your insect management area.