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Related Experiment Videos

Trifluralin transfer from top soil

F Malterre1, J G Pierre, M Schiavon

  • 1Ecole Nationale Supérieure d'Agronomie et des Industries Alimentaires, Vandoeuvre-Lès Nancy, France.

Ecotoxicology and Environmental Safety
|March 27, 1998
PubMed
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Leaching of trifluralin from soil is minimal, with less than 1% of the applied product found in leachate after one year. Degradation products, not trifluralin itself, constitute the majority of leached radioactivity.

Area of Science:

  • Environmental Chemistry
  • Soil Science
  • Agrochemical Research

Background:

  • Trifluralin is a widely used herbicide.
  • Understanding its environmental fate, particularly leaching, is crucial for risk assessment.
  • Soil leaching studies inform agricultural best practices and environmental protection.

Purpose of the Study:

  • To quantify the leaching of trifluralin and its degradation products in soil.
  • To assess the long-term fate of trifluralin under outdoor conditions.
  • To determine the influence of formulation on trifluralin leaching.

Main Methods:

  • A microlysimeter experiment was conducted under outdoor conditions.
  • 14C-ring-labeled technical trifluralin was applied to the top 5 cm of soil.

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  • Leachate was collected and analyzed over 18 months to measure radioactivity and identify compounds.

    • Main Results:

    • Leaching of trifluralin residues was low, representing 2.2% to 6.7% of applied radioactivity over 18 months.
    • Degradation products A and B comprised approximately 90% of the leached radioactivity.
    • Trifluralin itself was minimally detected in leachate (0.06% of applied product after 1 year).

    Conclusions:

    • Trifluralin exhibits low leaching potential from soil.
    • Soil degradation significantly reduces the amount of parent trifluralin in leachate.
    • Formulation type does not substantially impact trifluralin leaching behavior.