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Soil Detection and Mobility of Fluridone

Published online by Cambridge University Press:  12 June 2017

P. A. Banks  and
M. G. Merkle
P. A. Banks
Affiliation:
Soil and Crop Sci. Dep., Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843
M. G. Merkle
Affiliation:
Soil and Crop Sci. Dep., Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843
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Abstract

Bioassay and gas chromatographic procedures were evaluated for their effectiveness in detecting fluridone [1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(1H)-pyridinone] in soil. Bioassay procedures were limited to a detection range of 0.05 to 0.45 ppmw if grain sorghum (Sorghum bicolor (L.) Monech) was used. Visual estimations of chlorophyll content in affected plants, used as an indicator of fluridone concentration, were as reliable as spectrophotometric determinations. Gas-liquid chromatographic (GLC) procedures were less variable than the bioassay and had no upper limit of detection. Recovery of fluridone from treated soil ranged from 60 to 100 percent, depending on soil type. Soil water content affected percent recovery. Fluridone did not leach more than 1 cm in clay or sandy loam soils when up to 10 cm of water was passed through a soil column containing the herbicide, as determined by GLC. Extensive downward movement, 12 to 16 cm, occurred in a coarse sand when 5 or 10 cm of water was passed through the column.

Keywords

Bioassaygas-liquid chromatographherbicide
Type
Research Article
Information
Weed Science , Volume 27 , Issue 3 , May 1979 , pp. 309 - 312
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

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