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Sulfonylurea Herbicide Effects on Following Crops

Published online by Cambridge University Press:  12 June 2017

Jim R. Moyer
Jim R. Moyer*
Affiliation:
Res. Cent., Agric. and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
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Abstract

Five sulfonylurea herbicides were applied to Typic Boroll soil with pH 8.0 and 2% organic matter in the field and growth chamber to assess their residual effects on following crops. Under irrigated conditions, triasulfuron at 22 g/ha reduced the growth of alfalfa, canola, corn, lentil, pea, potato, and sugarbeet the year after application but caused no injury after two years. Alfalfa GR50 (rate required to reduce growth by 50%) values immediately after application of chlorsulfuron, triasulfuron, and metsulfuron were < 2.2 g/ha and similar in the growth chamber and field. Alfalfa and canola GR50 values immediately after thifensulfuron application in the growth chamber were ≥ 90 g/ha. Alfalfa, canola, flax, and sugarbeet GR50 for tribenuron in the growth chamber were < 4 g/ha. Crop response curves developed by growth chamber experiments could replace many of the multiple site and crop field experiments now required to develop recropping guidelines for residual herbicides.

Keywords

alfalfa, Medicago sativa L.canola, Brassica napus L.corn, Zea mays L.lentil, Lens culinans Medikpea, Pisum sativum L.potato, Solanum tuberosum L.sugarbeet, Beta vulgaris L.ChlorsulfurontriasulfuronmetsulfurontribenuronthifensulfuronBeta vulgarisBrassica napusLens culinarisMedicago sativaPisum sativumSolanum tuberosumZea mays
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 373 - 379
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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