WASHINGTON (CN) - The Environmental Protection Agency has approved lower tolerance levels for the weed killer clopyralid than those requested by Interregional Research Group 4, an EPA funded agricultural research project based at Rutgers University in New Jersey.
The group had requested a tolerance of 5.0 ppm for Swiss chard and 6.0 ppm for strawberries and blueberries. The EPA approved tolerances of 3.0 ppm for Swiss chard and 0.5 ppm for blueberries and 4.0 ppm for strawberries.
Clopyralid was once a fairly common lawn pesticide that was banned by the city of Seattle in 1999 because it was found to persist in composted vegetation. Not much later, Dow AgroScientists stopped using clopyralid for lawn care.
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