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Sweet Potato (Ipomoea batatas) Clones Differ in Response to Ethyl-Metribuzin

Published online by Cambridge University Press:  12 June 2017

Carl E. Motsenbocker  and
Thomas J. Monaco
Carl E. Motsenbocker
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27695-7609
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27695-7609
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Abstract

Six commercial sweet potato clones were evaluated in field and greenhouse studies for the ethylthio analog of metribuzin (ethyl-metribuzin) tolerance. ‘Southern Delite’ was most tolerant in field studies and ‘Cordner’ the most tolerant in the greenhouse. ‘White Delite’ was the most susceptible clone in the field and greenhouse. Considering the rates used in this study, all the sweet potato clones generally were tolerant to ethyl-metribuzin. When averaged over all clones, sweet potato injury increased as the ethyl-metribuzin rate increased from 1.6 to 3.2 kg/ha but injury decreased as the season progressed and was minimal in late season. Ethyl-metribuzin did not reduce marketable yields at Clayton, NC. At Clinton, NC, ethiozin PRE, POST, or PRE followed by POST at 3.2 kg/ha or PRE at 1.6 kg/ha reduced yield.

Keywords

Ethyl-metribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(ethylthio)-1,2,4-triazin-5(4H)-onesweet potato, Ipomoea batatas, (L.), Lam.Herbicide tolerancepostemergencepreemergenceselectivityasymmetrical triazine
Type
Research
Information
Weed Technology , Volume 9 , Issue 3 , September 1995 , pp. 546 - 552
Copyright
Copyright © 1995 by the Weed Science Society of America 

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