May 16, 2013

Tiny Doses of Some Insecticides Fatal for Bees, Aquatic Insects

"May 15, 2013 - Neonicotinoid insecticides have adverse effects not only on bees but also on freshwater invertebrates. Exposure to low but constant concentrations of these substances -- which are highly soluble in water -- has lethal effects on these aquatic organisms."

One of the insecticides this article addresses is imidacloprid, the active ingredient in Merit. I fought a losing battle several years ago against using Merit in our townhouse complex (less than 20m from Byrne Creek) to combat chaffer beetles (and we had not even had an outbreak!).

Even Bayer's fact sheet for Merit states it is highly toxic to aquatic invertebrates, and says it should not be applied to water, or where surface water is present. It also says it can contaminate groundwater.

I contacted Environment Canada back then with the argument that the application ban should also extend to any ground that drains into a storm drain. They didn't buy it.

Posted by Paul at May 16, 2013 01:14 PM