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Related Experiment Videos

Measuring herbicide volatilization from bare soil.

S R Yates1

  • 1USDA-ARS, GEBJ Salinity Laboratory, 450 W. Big Springs Road, Riverside, California 92507, USA. syates@ussl.ars.usda.gov

Environmental Science & Technology
|June 6, 2006
PubMed
Summary
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Significant volatilization of the herbicide triallate occurs when applied directly to bare soil. This study measured triallate dissipation and volatilization rates over 6.5 days using multiple methods.

Area of Science:

  • Environmental Chemistry
  • Agricultural Science
  • Soil Science

Background:

  • Herbicides are crucial for weed management in agriculture.
  • Understanding herbicide fate in the environment is essential for risk assessment.
  • Triallate is a herbicide commonly used for weed control.

Purpose of the Study:

  • To quantify the surface dissipation and volatilization of triallate.
  • To assess the impact of direct soil application on herbicide loss.
  • To compare different methods for measuring herbicide volatilization.

Main Methods:

  • Field experiment measuring triallate dissipation and volatilization.
  • Utilized micrometeorological (integrated horizontal flux, theoretical profile shape) and flux chamber methods.

Related Experiment Videos

  • Soil sampling to determine triallate mass over time.

    • Main Results:

    • Average volatilization rate was 361 g ha(-1) d(-1).
    • Approximately 31% of applied triallate was lost from the soil over 6.5 days.
    • Micrometeorological methods showed higher daily peak volatilization rates than flux chambers.

    Conclusions:

    • Significant volatilization of triallate is possible from bare soil surfaces.
    • Direct application without soil incorporation increases herbicide loss.
    • Results highlight the importance of application methods for herbicide environmental fate.