Journal article
The Washington aerial spray drift study: assessment of off-target organophosphorus insecticide atmospheric movement by plant surface volatilization
Atmospheric environment (1994), Vol.38(33), pp.5703-5713
10/2004
Handle:
https://hdl.handle.net/2376/106379
Abstract
Post-application pesticide emissions from wetted leaf surfaces and soil may present a significant pathway of exposure to humans in nearby residential communities. In this study, high volume air sampling was performed to measure airborne concentrations of the pesticide methamidophos in a residential community in close proximity to aerial spraying. Sampling occurred before, during and 24h post-application. To evaluate whether predictive models could reliably estimate residential exposure to methamidophos, an emission factor was used for estimating fluxes of volatilized material over the sprayed area for a 1-day post-application period. These flux estimates were then incorporated into a fugitive dust gaussian dispersion model (FDM) for assessing distribution of mass around the sprayed area. The predictive model output was compared with the field air sampler measurements. In our comparison, 1-day flux estimates from the model were found to be associated to observed field measurement data, with an r2=0.63 the day of the spray and r2=0.67 the day after the spray. The volatilization model however appears to underestimate surface emission flux immediately after the spray and overestimate the emission the next day.
Metrics
8 Record Views
Details
- Title
- The Washington aerial spray drift study: assessment of off-target organophosphorus insecticide atmospheric movement by plant surface volatilization
- Creators
- Jaya Ramaprasad - Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195-7234, USAMing-Yi Tsai - Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195-7234, USAKai Elgethun - Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195-7234, USAVincent R Hebert - Food and Environmental Quality Laboratory, Washington State University, USAAllan Felsot - Food and Environmental Quality Laboratory, Washington State University, USAMichael G Yost - Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195-7234, USARichard A Fenske - Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195-7234, USA
- Publication Details
- Atmospheric environment (1994), Vol.38(33), pp.5703-5713
- Academic Unit
- Entomology, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900546552801842
- Language
- English
- Resource Type
- Journal article