BC Researchers Conclude that Common Pesticides in Runoff Harm Rainbow Trout
Scientists at Simon Fraser University in British Columbia studied the effects of a mixture of 10 common pesticides on Rainbow Trout. Their conclusion – that the mixture of agricultural herbicides & insecticides may be causing the trout to lose its sense of smell. The trout’s sense of smell is important in detecting predators and in finding a mate. The researchers hope that government regulators will consider these findings when setting limits on pesticide use. One key point they make is that the combination of pesticides must be considered when setting regulations. Regulations are currently based normally on single pesticides … whereas the combination that enters rivers and streams from agricultural runoff seems to be more hazardous than any one pesticide.
This reminds me of the debate by Winnipeg’s city council to ban pesticides by homeowners. After public hearings on the issue, the city decided to NOT take the “drastic actions” of other municipalities in enforcing a ban on the use of pesticides by homeowners. Instead, they opted for a law requiring companies and individuals to put up larger signs warning the public about the application of pesticides. While this is a good “first step”, I found it to be disappointing. While most of the pesticides entering Manitoba’s waterways is likely due to agricultural use, those of us living in the City can’t avoid our own responsibilities in this area. I understand the challenges … our school is not allowed to use pesticides and every spring/summer the lawn is FULL of dandelions! There must be other options … but I confess that I haven’t researched them! Perhaps some leisurely reading this summer!? 
Mr. Patenaude