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NOTICE, May 22, 2020: After recent precipitation and some warmer temperatures, it has been determined that a second aerial application of larvicide will be conducted on Monday, May 25th to the standing waters in all communities (Ailsa Craig, Nairn and Parkhill)
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MUNICIPALITY OF NORTH MIDDLESEX
NOTICE OF AERIAL APPLICATION OF LARVICIDE
FOR MOSQUITO CONTROL
NOTICE: THE FIRST AERIAL APPLICATION WILL BE CONDUCTED ON TUESDAY, APRIL 7, 2020.
Timing for application is of the essence. Given the environmental conditions, today was the only suitable day for flying this week. Wind is the major factor.
Yes, we did get some precipitation following the application, and possibly more tonight as well in North Middlesex. The way that the B.t.i. works is that once the corn granules hit the water's surface, the bacteria is released into the water column. The mosquito larvae filter feed and ingest the bacteria in their mid-gut. Mortality normally occurs within 2 hours, sometimes longer when it is colder. The bacteria is active in the water column for about 72 hours, which is why timing of the application is very important. We've been assured that there is no need to worry about precipitation after the aerial Application, the larvae will be dead relatively soon after applying it and will remain active for about 3 days.
NOTE: B.t.i. is very specific to mosquitoes and black fly larvae because their mid-gut is alkaline. Most other aquatic organisms can eat the bacteria up as food with no adverse affects. The B.t.i. does NOT affect bees!
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When weather conditions permit and continuing as required throughout the season, the Municipality of North Middlesex will be applying a biological larvicide (B.t.i.) by helicopter to standing water within 3km of Parkhill, Ailsa Craig and Nairn beginning April 1st through Aug. 31st, 2020. The program will utilize application of the larvicide VectoBac 200G (PCP#18158, granular) or VectoBac 1200L (PCP#21062, liquid) by ground in order to control larval mosquitoes.
If you require further information in regards to the Mosquito Control Program, you may contact Kevin Taylor at Pestalto Environmental Health Services Inc. at
1-866-648-7773 or kevin.taylor@pestalto.com
BTI Fact Sheet - click here.
Health Canada re-evaluation decision - click here.
Nairn Boundary Map.
Ailsa Craig Boundary Map.
Parkhill Mosquito Area Map.