Insecticide Inquiry from Twitter
Had an inquiry come in via Twitter from @ecoDomestica and @ChrisInEdmonton asking the following:
Why is Dursban, an insecticide that kills frogs & tadpoles, being used as part of #yeg mosquito control program?
I inquired with the city’s Office of the Environment and received the following information:
There is no evidence that the amounts of Dursban used, and the targeted nature of the City of Edmonton’s program has had any effect on amphibian populations.
While laboratory trials with large doses of directly injected organophosphates have shown effects on developing amphibians, this does not match the kinds of exposures amphibians receive in field conditions.
Both wood frogs (Rana sylvatica) and boreal chorus frogs (Pseudacris maculata) remain abundant in all suitable habitats in the Edmonton area. The City continually monitors populations of non-target organisms and has not seen any decline in amphibian populations. All native species of frogs are thriving in habitats treated by the control program.
As with fluoride, all things in moderation I suppose.
My concern is that it is bad enough to be banned by the Federal Government, and the ban was only lifted to deal with mosquitos who may carry West Nile- which these mosquitos do not.
My major concern is sadly not for frogs- but for my children. While they may not play near the spraying areas, they are living in a city that chooses a short cut and is taking advantage of the federal lift on the ban to take care of nuisance mosquitos rather than the dangerous ones the ban was lifted for.
I am angry about this because this is the exact type of thing that makes people feel apathetic about democracy. Obviously there is something wrong with Dursban if it was banned in the first place, but now Edmonton has just “decided” it’s FINE! Don’t WORRY about it! Just pretend we’re all okay!
My children will be just as disgruntled as I am about the government, and that makes me angry.
Thanks to Mike Jenkins with the city’s Office of Environment for the following further detail quoted below:
Edmonton remains the only city in Alberta and perhaps in Canada that still uses this and it is unnecessary. It appears that Health Canada is registering this product for Edmonton only. It is actually been considered for annexation by the Stockholm convention. Studies support the need to remove it and use safer alternatives.
This string takes me by surprise.
We are spraying for a nuisance with a persistent organic pollutant. If west nile was present perhaps, but this use of Durban lacks common sense from a risk benefit perspective. We need to align our integrated pest management with reasonable health protection.
Maybe a scientific advisory board could help council better evaluate policy and make informed science-based decisions with less industry influence. Sadly your post seems to take several speaking notes straight from industry. Do you think because the city uses Dursban that people will not use DEET or other chemicals?
Also, Winnipeg which has Yellow Fever to contend with has sold its reserves to Edmonton. The city does not need to resort to fogging to spray for mosquitoes as there are other safer methods. In 2011 the city said this would be the last year we would use this product (and mosquitoes were bad that year regardless….this kills predators to mosquitoes so we should even question whether it works). The last diagnosed case of West Nile was 2007 (1 case) in Edmonton. How many children have had neurological damage from this very potent and persistent neurotoxin? Why are we the last city in our nation to think this is still acceptable and yet call ourselves green??
This statement alone from Mike Jenkins should raise serious concern: “In 2000, following a re-evaluation of the various uses of chlorpyrifos (the active ingredient in Dursban), the manufacturer voluntarily withdrew the use of Dursban from domestic and structural uses.” If the manufacturer itself voluntarily withdrew use of its product, then that means they recognize its unsuitability and risk.
Canada DID indicate it intended to ban Dursban, following the U.S.’s lead. Continued use of this product is criminal.