TRIFLURALIN: ACUTE TOXICITY TOE THE MAYFLY, HEXAGENIA LIMBATA, UNDER FLOW-THROUGH CONDITIONS
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The test substance trifluralin, a,a,a-trifluro-2,6-dinitro-N,N-dipropyl-p-toluidine is a yellow-orange crystal that is used commercially as an herbicide. It is used as a selective preemergence herbicide. Its solubility in water is less than 1 mg/L (Farm Chemicals Handbook, 1987). Commonly used trade names are DigerminR, TR-lOR, TreflanR or TriflurexR. The objectives of this study were to determine the toxicity of trifluralin to the mayfly, Hexagenia limbata, from a single exposure approaching the solubility limit of trifluralin in water, under flow-through test conditions.