Eradicating Swamp Buttercup in pastures

Asked September 25, 2013, 1:48 PM EDT

Every year the moister areas of our cattle pasture get more and more covered with Swamp Buttercup ( Ranuculas Hispidus/Repens?) What spray is most effective to kill it without destroying the native grass and clover? When is the best time to apply it? It is not good for the cattle and horses and needs to be controlled.

Lincoln County Oregon

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