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Foot Transfer of Lawn Applied Pesticides from Turf to Carpet: Comparison of Semivolatile Chlorpyrifos With Nonvolatile Chlorothalonil

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Abstract: Residues of pesticides are found on lawns after direct applications or as a result of drift from applications to ornamentals, gardens, or perimeters of buildings. These residues dissipate by volatilization, transport to soil by rainfall or watering, photochemical and microbial degradation, and other mechanisms. The lifetimes of pesticide residues on turf are generally short relative to those on indoor surfaces. Many of the pesticides identified in house dust and indoor air obviously have outdoor sources. The presence in house dust of pesticides that are typically used on the lawn or garden, suggest track-in of turf and soil residues.

The study described here was conducted to examine the temporal behavior of dislodgeable turf residues of two pesticides that have been commonly used on lawns and estimate the extent to which they may be tracked into a home by normal walking and entry into the home. This study was carried out to compare dislodgeable turf residue levels and track-in rates for differing pesticides, application methods, and application rates. The applicability of this test design, and comparison of chemical factors such as volatility and water solubility to significantly different pesticides were evaluated here with the insecticide chlorpyrifos in both emulsifiable concentrate (EC) spray and granular applications and the fungicide chlorothalonil in an EC formulation.

The U.S. Environmental Protection Agency through its Office of Research and Development funded the research described here under Contract No. 68-DO-0007 to Battelle. It has been subjected to Agency review and approved for publication. Mention of trade names or commercial product does not constitute endorsement or recommendation for use.
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Citation:Nishioka, M. G., R. G. Lewis, M. C. Brinkman, and H. M. Burkholder. Foot Transfer of Lawn Applied Pesticides from Turf to Carpet: Comparison of Semivolatile Chlorpyrifos With Nonvolatile Chlorothalonil. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 68(1):64-71, (2002).
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Exposure Methods & Monitoring Branch
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Product Type: Journal
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Published: 01/15/2002
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Related Entries:
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Bullet Item Development and Application of Methods to Assess Human Exposure to Pesticides
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Last Updated on Monday, October 22, 2007
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