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US Fed evaluation: 3 more pesticides may harm salmon by JEFF BARNARD April 10,2012   |  Source: AP

A draft federal evaluation has found that three more common pesticides used on home lawns and agricultural crops jeopardize the survival of West Coast salmon in the United States.

The evaluation from NOAA Fisheries Service is the latest one resulting from lawsuits filed by conservation groups and salmon fishermen demanding the U.S. Environmental Protection Agency enforce restrictions on pesticides around salmon streams.

This one looked at the pre-emergent herbicides oryzalin, pendimenthalin and trifluralin. They are used to control weeds in lawns, on road shoulders, in orchards, vineyards, and farm fields growing soybeans, cotton, corn, Christmas trees and other crops. Heaviest use is in California. The herbicides are ingredients in more than 100 commercial products made by dozens of manufacturers.

NOAA Fisheries informed the U.S. Environmental Protection Agency that they are likely to jeopardize half the 26 salmon populations on the West Coast protected by the Endangered Species Act, and suggested restrictions like no-spray buffers to keep them out of salmon streams.

Trifluralin is the most toxic of the three, and deforms fish backbones even at low concentrations. It is used on soybeans, cotton, lawns and road shoulders.

Oryzalin is the least toxic, and is

 

© 2012 Bloomberg L.P.

Theme(s): Fisheries Resources.

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