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Monitoring Herbicide Movement in Forests: Dissipation and Off-site Sampling Results

This study by Pam Wofford examines the dissipation and off-site movement of aerially applied forestry herbicides in Beargrass, Yarrow, Huckleberry, and Manzanita sites. Results show no detectable herbicide amounts off-site. The MDL is set at 0.05 ppm for some areas and 0.10 ppm for others. The report includes findings from spring and fall sampling conducted on specific acreages and plant types. The study also covers water monitoring by the Hupa and Karuk Tribes.

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Monitoring Herbicide Movement in Forests: Dissipation and Off-site Sampling Results

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  1. Dissipation and Off-site Movement of Aerially Applied Forestry Herbicides Pam Wofford Department of Pesticide Regulation Tribal Environmental Work Group Klamath, CA February 14, 2001

  2. Plant Monitoring Spring 2000:Two dissipation sampling sites Beargrass One off-site sampling site Beargrass Fall 2000: Two dissipation sampling sites Yarrow Huckleberry Manzanita Two off-site sampling sites Beargrass Huckleberry Yarrow

  3. Spring 2000 Triclopyr & 2,4-D Beargrass 225 acres Fall 2000 Triclopyr & 2,4-D Beargrass Huckleberry 25 acres Fall 2000 Triclopyr & 2,4-D Yarrow 35 acres

  4. Results of sampling for off-site movement ano detectable amount. MDL is 0.05 ppm bno detectable amount. MDL is 0.10 ppm

  5. Spring 2000 Triclopyr 2,4-D Beargrass 25 acres Spring 2000 Triclopyr 2,4-D Beargrass 66 acres Fall 2000 Triclopyr 2,4-D Yarrow Huckleberry 116 acres

  6. Fall 2000 Tricloypr 2,4-D Manzanita 44 acres

  7. Hupa & Karuk Water Monitoring

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