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Availability and Persistence of Imazaquin, Imazethapyr, and Clomazone in Soil

Published online by Cambridge University Press:  12 June 2017

Mark M. Loux ,
Rex A. Liebl  and
Fred W. Slife
Mark M. Loux
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL 61801
Rex A. Liebl
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL 61801
Fred W. Slife
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL 61801
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Abstract

The availability and persistence of imazaquin, imazethapyr, and clomazone were studied in a Cisne silt loam (1.3% organic matter) and a Drummer silty clay loam (5.8% organic matter). Availability of all three herbicides to bioassay species was greater in the Cisne soil than in the Drummer soil. Corn root growth was more sensitive to imazaquin and imazethapyr than corn shoot growth. Shoot and root growth of wheat was inhbited by similar clomazone concentrations. In field experiments conducted in 1984, 1985, and 1986, all three herbicides were more persistent in the Drummer silty clay loam than in the Cisne silt loam. Clomazone and imazethapyr were detected by liquid or gas chromatographic analysis in the Drummer soil 3 yr following application. Crop injury occurred 5 months after application of imazaquin and clomazone to the Drummer soil. In the Cisne soil, only imazethapyr caused crop injury 5 months after application. Herbicide residues found below 7.5 cm were greater in the Drummer soil than in the Cisne soil.

Keywords

Imazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl] −3-quinolinecarboxylic acidimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidclomazone 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinonecorn, Zea mays L. ‘B73 X Mo17′wheat, Triticum aestivum L. ‘Caldwell’Bioactivitycarryoverdissipation
Type
Soil, Air, and Water
Information
Weed Science , Volume 37 , Issue 2 , March 1989 , pp. 259 - 267
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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