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Weed Control by Alachlor and Residues in Sweet Potato (Ipomoea batatas) and Soil

Published online by Cambridge University Press:  12 June 2017

Nancy D. Herman ,
Thomas J. Monaco  and
T. Jack Sheets
Nancy D. Herman
Affiliation:
Dep. Hortic. Sci., Pestic. Residue Res. Lab., North Carolina State Univ., Raleigh, NC 27650
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., Pestic. Residue Res. Lab., North Carolina State Univ., Raleigh, NC 27650
T. Jack Sheets
Affiliation:
Dep. Hortic. Sci., Pestic. Residue Res. Lab., North Carolina State Univ., Raleigh, NC 27650
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Abstract

Alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide] at 3.4 and 6.7 kg/ha controlled weeds present in sweet potatoes (Ipomoea batatas L. ‘Jewel’, ‘Centennial’, ‘Caromex’) at two locations in North Carolina. Yield was not reduced from slight early season injury observed with the herbicide treatments. Most sweet potato root samples contained less than the detectable limit of 0.05 ppmw of alachlor. At one location, samples of the cultivars Jewel and Centennial that received 6.7 kg/ha contained 0.06 and 0.05 ppmw, respectively. Averaged over locations, residue levels in soil samples from plots treated at 6.7 kg/ha decreased from 1.55 ppmw initially to less than 0.05 ppmw by 16 weeks after application.

Keywords

Eleusine indica # ELEINPortulaca oleracea # POROLmethod of analysisdiphenamid
Type
Research Article
Information
Weed Science , Volume 31 , Issue 4 , July 1983 , pp. 567 - 571
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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