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Published online 7 June 2005
Published in J Environ Qual 34:1205-1213 (2005)
DOI: 10.2134/jeq2004.0473
© 2005 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
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Accelerated Soil Dissipation of Tebuconazole following Multiple Applications to Peanut

Thomas L. Pottera,*, Timothy C. Stricklanda, Hyun Joob and Albert K. Culbreathc

a USDA-ARS, Southeast Watershed Research Laboratory, P.O. Box 748, Tifton, GA 31793
b Department of Environmental and Molecular Toxicology, North Carolina State University, Raleigh, NC 27695
c Department of Plant Pathology, University of Georgia Coastal Plain Experiment Station, Tifton, GA 31794



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  		Fig. 1. Daily rainfall and irrigation and dates of tebuconazole application and soil sample collection and peanut digging. DAP, days after planting.

 


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  		Fig. 2. Structures of tebuconazole and confirmed ({dagger}) and proposed ({ddagger}) degradates.

 


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  		Fig. 3. Tebuconazole dissipation during laboratory incubations of spiked control and treated plot soil samples collected after the first application on 28 days after planting (DAP).

 


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  		Fig. 4. Tebuconazole dissipation during laboratory incubations of spiked control and treated plot soil samples collected after the fourth application on 71 days after planting (DAP).

 


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  		Fig. 5. Predicted and measured tebuconazole and sum of degradate concentrations, rainfall plus irrigation, and estimated leaf area index (LAI) following tebuconazole applications to peanuts on 28, 43, 59, and 71 days after planting (DAP). Leaf area index predicted from best-fit equation (r2 = 0.84) to data reported by Truman and Williams (2001).

 




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