TRIFLURALIN: ACUTE TOXICITY TO THE MIDGE, CHIRONOMUS TENTANS, UNDER FLOW-THROUGH CONDITIONS

Abstract

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 a 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 midge, Chironomus tentans, from a single exposure approaching the solubility limit of trifluralin in water, under flow-through test conditions.