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Effect of AC 222,293 Soil Residues on Rotational Crops

Published online by Cambridge University Press:  12 June 2017

Gary M. Fellows ,
Peter K. Fay ,
Gregg R. Carlson  and
Vern R. Stewart
Gary M. Fellows
Affiliation:
Plant Soil Sci. Dep., Mont. State Univ., Bozeman, MT 59717-0002
Peter K. Fay
Affiliation:
Plant Soil Sci. Dep., Mont. State Univ., Bozeman, MT 59717-0002
Gregg R. Carlson
Affiliation:
North. Mont. Agric. Res. Cent., Havre, MT 59501
Vern R. Stewart
Affiliation:
Northwest Mont. Agric. Res. Cent., Kalispell, MT 59901
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Abstract

AC 222,293, a postemergence herbicide for wild oat control in wheat, barley, and sunflower, was applied at five rates at three locations in Montana in the spring of 1985. Twelve and 11 crops were seeded into treated soil in 1985 and 1986, respectively. Sugarbeet, lentil, and rape were injured by residual levels of AC 222,293 14 months after application. Injury was significantly greater at one location, indicating herbicide bioavailability varied by location. Soil pH was correlated negatively with crop injury, indicating the herbicide persists longer on lower pH soils.

Keywords

AC 222,293, m-toluic acid, 6-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)-, methyl ester, and p-toluic acid, 2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)-, methyl esterbarley, Hordeum vulgare L.lentils, Lens culinaris Medikrape, Brassica napus L.potato, Solanum tuberosum L.sugarbeet, Beta vulgaris L.sunflower, Helianthus annuus L.wheat, Triticum aestivum L.wild oat, Avena fatua L. ♯4 AVEFAHerbicide persistencewild oatAVEFA
Type
Research
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 48 - 51
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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