Herbicide systems including linuron for Palmer amaranth (Amaranthus palmeri) control in sweetpotato

Field studies were conducted to determine sweetpotato tolerance to and weed control from management systems that included linuron. Treatments included flumioxazin preplant (107 g ai ha–1) followed by (fb) S-metolachlor (800 g ai ha–1), oryzalin (840 g ai ha–1), or linuron (280, 420, 560, 700, and 84...

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Bibliographic Details
Published in:Weed technology 2021-02, Vol.35 (1), p.49-56
Main Authors: Moore, Levi D., Jennings, Katherine M., Monks, David W., Boyette, Michael D., Jordan, David L., Leon, Ramon G.
Format: Article
Language:English
Subjects:
Agricultural production
Amaranth
Amaranthus palmeri
herbicide cultivation
herbicide tillage
Herbicides
Horticulture
Integrated approach
Ipomoea batatas
Linuron
Management systems
Metolachlor
Oryzalin
Research centers
Weed control
Weeds
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Summary:Field studies were conducted to determine sweetpotato tolerance to and weed control from management systems that included linuron. Treatments included flumioxazin preplant (107 g ai ha–1) followed by (fb) S-metolachlor (800 g ai ha–1), oryzalin (840 g ai ha–1), or linuron (280, 420, 560, 700, and 840 g ai ha–1) alone or mixed with S-metolachlor or oryzalin applied 7 d after transplanting. Weeds did not emerge before the treatment applications. Two of the four field studies were maintained weed-free throughout the season to evaluate sweetpotato tolerance without weed interference. The herbicide program with the greatest sweetpotato yield was flumioxazin fb S-metolachlor. Mixing linuron with S-metolachlor did not improve Palmer amaranth management and decreased marketable yield by up to 28% compared with flumioxazin fb S-metolachlor. Thus, linuron should not be applied POST in sweetpotato if Palmer amaranth has not emerged at the time of application. Nomenclature: Flumioxazin; linuron; oryzalin; S-metolachlor; Palmer amaranth, Amaranthus palmeri S. Watson AMAPA
ISSN:0890-037X
1550-2740
DOI:10.1017/wet.2020.63