Marianne Wilkinson

Councillor, Kanata North

Nuisance Mosquito Program

NOTE: Latest information and updates are noted below program information

The Kanata North Nuisance Mosquito Control Program targets mosquito larva found in wetlands to prevent hatching. The small, localized, program has been approved for four years from 2016 to 2019. GDG Environnement has commenced the first treatment and ongoing applications will be done to the treatment area  in and around Kanata North. The control agents are Bacillus Thuringiensis Israelensis (Bti) and Bacillus sphaericus  (Bs), which are a bacteria found naturally in soils. No other control agents will be used.  The Health Canada Regulatory Agency has approved both agents and has found them to have no effects on humans, birds, fish, animals or other insects. Bti and Bs are effective bacteria that destroy the stomachs of mosquito larvae that hatch in water.

The treatment program poses little risk to the natural environment.  Nonetheless, it includes a research project to detect any environmental changes to the area. The research project will be a partnership between the City’s Land Use and Natural Systems Unit, The University of Ottawa and GDG Environnement.


2016 Final Report

2016 Research Project Report

Summary of the 2016 Research for the Mosquito Program

More information on the Kanata North Nuisance Mosquito Control Program is available in reports to Council from February 16, 2016 and February 24, 2016.

For more information

Any inquires that my office receives about the Nuisance Mosquito Control Program are being sent directly to GDG Environnment for immediate action. Nuisances can arise for various reasons and so an investigation needs to take place when we hear that the treatment is not working as it should. You can direct your questions/requests directly to GDG Environnment by phone at 1-877-227-0552 or by e-mail at This process is in place to increase the effectiveness of the program.

For all inquiries related to Bti and Bs application in Kanata North, please contacGDG Environnement by email or toll-free hotline 1-877-227-0552.

For all inquiries related to the background information (community vote, project financing, levy, etc.), please contact Councillor Wilkinson’s Office by email or 613-580-2474.

For all inquiries related to the research project, please contact Nick Stow, City of Ottawa Planning & Growth Management Department by email or 613-580-2424 ext. 13000. 

For all other inquiries, please call 3-1-1. 


August 23, 2018: For the past few weeks we’ve been experiencing more adult mosquitoes due to heavy rains coming after a long drought resulting in flood plain mosquitoes eggs, that have been dormant, erupting.  GDG installed 15 traps to reduce the adult populations and get a better understanding of what happened.  I am concerned that their work has not kept up with this new infestation so I’m meeting with them this week and will report back in a future edition of this paper.  In the meantime please report any problem to GDG so they will know where to find the new areas which have larvae.  Email GDG at or call 1-877-227-0552 and they will respond to you and do a local field check.  

May 28, 2018: GDG has completed their spring treatment and have started their weekly sweep test which checks to see if adult mosquitoes are present. If you can help by volunteering to be an observer of these tests, please contact my office. It takes about an hour a week at dusk. You would accompany GDG staff to confirm the sweep test. Students can use this towards their required hours.

As we head into the warmer weather that mosquitoes enjoy, it is important to stay vigilant in making sure your property is free from any standing water. If you do find adult mosquitoes please call GDG Environment at 1(877)227-0552  or and they will respond within 48 hours.

May 10, 2018: As the weather warms up so does the activities of the mosquitoes. GDG has started treatment with handheld sprayers and aerial treatment by helicopter on large wetlands. You can help by ensuring that your property is free from any standing water. Larvae are found in the smallest amount of standing water so take a good look around your property. If you do find adult mosquitoes, please call GDG Environment at 1-877-227-0552 or and they will respond within 48 hours.

We are also looking for volunteers who would be interested in scrutinizing the sweep tests that are completed on a weekly basis. If you are interested, please contact my office.

April 17, 2018: Update from Councillor Wilkinson
GDG Environment will be at my Town Hall on April 23rd to present this year’s program and answer your questions. Earlier this year I met with City staff and GDG to review last year’s program as well as plan for this coming season. You might have noticed GDG staff surveying the surroundings to see where there might be potential hot spots in the area. I have reviewed this with them as well as identified areas of concern where we received a number of complaints last year. GDG personnel will start treatments as of April 23 (weather permitting). Treatments consist of the use of a helicopter as well as staff applying applications on foot using backpacks. It is very important that residents look for areas on their property where mosquitoes could breed including birdbaths, standing water and deep puddles. If you notice these places in and around your property, we ask that you empty the water out of them, as these are also breeding grounds for mosquitoes. If you would like to report an issue to GDG Environment please call them at 1-877-227-0552 or

March 29, 2018: Update from Councillor Wilkinson
Entomologist, Mark Ardis, from GDG Environmental, has provided the following information on the mosquitoes that are emerging as the air warms. He explained that the milder than usual winter may result in higher survival rates of overwintering mosquitoes, more specifically the Culiseta species. These mosquitoes overwinter in tree-holes and under the bark of trees and are the first mosquitoes we see flying in the spring. It is normal to see them flying around while there is still snow on the ground on warmer days. Because these mosquitoes overwinter as adults, they cannot be controlled by this spring’s biological mosquito larval control program. Fortunately Culiseta mosquitoes are not aggressive human biters and do not create much nuisance, unlike all other more voracious mosquito species that will soon develop in snowmelt ponds or wetland areas. I am meeting with GDG next week to discuss this year’s program, treating wetlands to stop larvae from hatching, which will commence in April.

August 24, 2017: Update from Councillor Wilkinson
GDG advised that with the rain we received on Tuesday, the Carp river has overflowed  in some areas and there is a new generation of larvae.  They are planning to do an aerial treatment either tomorrow (Friday) afternoon or Saturday morning (after 7 am).  It will be done by an airplane this time as the helicopter is not available.  The treatment will last approximately 30 min.  They will install the signs accordingly.  The Carp river is the only area where they will proceed with the aerial treatment. 

Since Wednesday, they have been doing ground treatments and they have been able to access the Arcadia development land.

June 29, 2017: Update from Councillor Wilkinson
Despite regular treatment to keep the mosquito larvae from hatching the heavy rains that created larger flood plains and puddles everywhere, has meant that some larvae survived. GDG has retreated some areas and I met with them this week to review the program and get them to expand operations.  Most mosquitoes in our area are floodplain varieties which can be dormant for up to 15 years. When the area floods they hatch so some areas are experiencing adult mosquitoes. A few landowners have not permitted treatment on their land which is why the program is based on an 80% reduction as not all larvae can be treated.  To volunteer to observe one of the weekly monitoring tests please contact my office. 

April 20, 2017: Public Service Announcement

Summary description: Nuisance mosquito control measures in the Kanata North area starts tomorrow, with ground applications. 

Nuisance mosquito control measures in Kanata North starts tomorrow

Thursday, April 20 – To control nuisance mosquito growth in Kanata North and the surrounding areas, larvicide will be applied throughout the summer, beginning with ground applications on April 21, and ending September 15.

The Kanata North Nuisance Mosquito Control Program deals with treating mosquito larvae in wetlands so they won’t hatch. No part of the program involves killing live mosquitoes.

Contractors, hired by the City of Ottawa, will do daily ground applications of a liquid larvicide in selected areas throughout the program. The application of granular larvicides through the air, by helicopter, is expected to take place sometime in the next two weeks.

The program will use Bti, (Bacillus Thuringiensis Israelensis) and Bs (Bacillus Sphaericus), which are naturally-occurring bacteria, that is dropped directly into the water where the larvae are found. Feeding larvae draw it in with the water, which stops them from becoming adult mosquitoes.

The Health Canada Regulatory Agency states that Bti and Bs have no effect on humans, birds, fish, animals or other insects, but destroys the stomachs of mosquito and black fly larvae that hatch in water.

Quality control includes weekly nuisance tests at five sites. There will also be post-treatment larva surveillance and extra applications of larvicide, if needed.

The treatment area map and program details can be found on For further information about the larvicide application, contact GDG Environment at INFO@GDG.CA, or call, toll free: 1-877-227-0552.

For more information on City programs and services, visit or call 3-1-1 (TTY: 613-580-2401). You can also connect with us through Facebook, Twitter and Instagram.

Sept 8:  The month of August has been fairly wet with over 100 mm of rainfall. Because of the intense amounts of rain received over a short period of time, streams overflowed their banks causing flooding of dry ponds and wetlands along the floodplain. This has generated a new generation of a flood water mosquitoes. Treatments were launched to control these mosquitoes, including use of their helicopter in the Kizell wetlands. They have been in the field treating from backpacks as well, but continuing showers have made it difficult to treat all areas where they breed so we have some problem areas. If you experience many mosquitoes please notify the contractor, GDG at or call 1-877-227-0552 so they can investigate the cause and provide treatment in that area. Only larvae are treated so some mosquitoes will remain. Mosquito larvae can stay dormant for many years in dried up flood plains so information from the public is crucial to improving treatments in the future. The biological treatment program will end on September 19th this year and recommence next March.

Aug 16: Update from GDG Environnement – Mosquito treatment is presently ongoing in the Kanata area. Due to the accumulation of 64 to 89mm of rain during the weekend, larvae have appeared in most sites. Terrestrial treatment started on Monday, August 15th, and should be ongoing until Friday, August 19th. Aerial treatment around the Goulbourn Forced Road/Beaver pond will be done either Thursday or Friday. The helicopter will fly for less than an hour in that sector. Kanata_Aerial_Treatment_2016-08-17

July 5: Press Release G.D.G Canada, University of Ottawa and City of Ottawa collaborating on research on the effects of BTI treatments on non-biting midges in the South March Highlands.

July 4: Press Release by GDG Environnment re: Cattail Marsh Mosquitoes.
GDG Environnment confirmed that “a spring treatment was done in Kanata North for the Coquilletidia perturbans and field monitoring is continuously being performed for mosquito larvae developpement sites.”

May 17: The aerial application was completed this morning. The helicopter flew over Kanata a total of 2h45 between 8h and noon.  No other aerial application is planned in the short term.

May 16: If there is no wind, the next aerial application in Kanata will be Tuesday the 17th of May on very specific areas of cattail marshes in South March park and Beaver pond area.