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Wildfire evacuations: Learn how the City is supporting evacuees from other parts of Manitoba

City services in the event of a Canada Post work stoppage

Wildfire evacuations: Learn how the City is supporting evacuees from other parts of Manitoba

City services in the event of a Canada Post work stoppage

Insect Control

Tree Pest Caterpillar Spraying Schedule 2025

Report insect concerns

Tree pest caterpillar (cankerworm) on public property

Tree Pest Caterpillar Control Program

Tree pest caterpillar treatment crews will only be treating selected streets within each IMA that have or are at risk of significant defoliation. Not all streets within an IMA will be treated.

IMAs to be sprayed will be announced at least 8 hours in advance of spraying operations.

The City of Winnipeg controls forest tent caterpillar and cankerworms on City-owned trees using the biological insecticide Foray® 48B (Foray® 48B Label / Foray® 48B SDS).

Citizens can register for notifications using the following link: Tree Pest Caterpillar Control Program Notification

Spraying Schedule: Tree Pest Caterpillar Program Continues - June 6, 2025

Areas to be treated Areas to be treated  
Areas previously treated Areas previously treated  





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 Cankerworm Control Program Map

Tree Pest Caterpillar Control Program

  • Start Date: May 20, 2025
  • End Date:

Previous Treatment Dates:

  • June 5, 2025 - IMA 49 and 40
  • June 4, 2025 - IMA 50 and 49
  • June 3, 2025 - IMA 50
  • June 2, 2025 - IMA 50
  • May 30, 2025 - IMA 30 and 50
  • May 29, 2025 - IMA 30
  • May 28, 2025 - IMA 31 and 30
  • May 27, 2025 - IMA 31 and 30
  • May 26, 2025 - IMA 31
  • May 23, 2025 - IMA 25 and 31
  • May 22, 2025 - IMA 25 and 32
  • May 21, 2025 - IMA 25 and 32
  • May 20, 2025 - IMA 25

Tree Pest Caterpillar Program Archives

2024 | 2023


Last update: June 6, 2025
Contact Us
311
or 1-877-311-4WPG
Media inquiries: 204-986-6000
Contact 311

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.

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