What other cities have same program, for how long, how funded?

There are a number of municipalities that have similar programs in the province of Quebec, however, to our knowledge we are the first municipality in Ontario to have such a program.

Why has the larvicide program failed for the last 2 summers?

The larvicide program has not failed over the last two summers, however, there were environmental factors that diminished its efficiency.

In 2018, Kanata North had a record rainfall event (200 mm over a few days) that occurred in late July and early August, causing large amounts of mosquito development sites to become active. Given the short window of opportunity for treatment, mosquitoes were able to develop into adults at some treatment sites before these could be treated. Through this experience, GDG learned about these flood water mosquitos and now understands that they need to treat further up the Carp River flood plain in order to lower overall populations in Kanata North. 

In 2019, GDG also learned that these species can fly longer distances and that the Carp river will overflow its banks with less rain than was originally predicted. It has a large catchment basin, meaning it receives lots of water from tributaries causing frequent flooding. 200 hectares have been added to the surface area of the treatment map in 2019 based on residential feedback and GDG’s mosquito trap data. With this information and these added areas, GDG will have better control in future years and residents should notice a difference.

Does the larvicide affect dragonfly larvae can the company provide evidence?

No, there is no evidence to suggest that the larvicide affects dragonflies. In fact, long-term research carried out by teams in Minnesota, France, Sweden, and Germany demonstrated no impact on secondary consumers in targeted areas. Bti’s are considered a discriminant approach as it only affects targeted species.

Why is there a need for the University of Ottawa to study the impact on plant life? What about the studied on the impact to animal life?

The University of Ottawa study included analysis of other ‘prey’ species of insects and larva such as Chironomidae (a fly whose larva feed through water filtration, much like mosquitoes), Odonata, and other non-target Arthropoda to ensure that non-target species were not adversely affected and that the primary food sources of larger animals in the food web continued to thrive.

Why is the program so expensive?

The RFP process was public and open to bidders. This open process resulted in a price per household that will be lower than it was for the last four years and a contract which obligates the successful bidder, GDG, to reduce mosquito populations by 80%.