Author:
Beam Shawn C.,Jennings Katherine M.,Chaudhari Sushila,Monks David W.,Schultheis Jonathan R.,Waldschmidt Mathew
Abstract
AbstractField studies were conducted in 2015 and 2016 in North Carolina to determine the response of ‘Covington’ and ‘Murasaki-29’ sweetpotato cultivars to four rates of linuron (420, 560, 840, and 1,120 g ai ha–1) alone or withS-metolachlor (803 g ai ha–1) applied 7 or 14 d after transplanting (DAP). Injury (chlorosis/necrosis and stunting) to both cultivars was greater when linuron was applied withS-metolachlor as compared to linuron applied alone. Herbicide application at 14 DAP caused greater injury (chlorosis/necrosis and stunting) to both cultivars than when applied at 7 DAP. At 4 wk after treatment (WAT), stunting of Covington and Murasaki-29 (hereafter Murasaki) from linuron at 420 to 1,120 g ha–1increased from 27% to 50% and 25% to 53%, respectively. At 7 or 8 WAT, crop stunting of 8% or less and 0% was observed in Covington and Murasaki, respectively, regardless of application rate and timing. Murasaki root yields were similar in the linuron alone or withS-metolachlor treatments, and were lower than the nontreated check. In 2016, no. 1 and marketable sweetpotato yields of Covington were similar for the nontreated check, linuron alone, or linuron plusS-metolachlor treatments, but not in 2015. Decreases in no. 1 and marketable root yields were observed when herbicides were applied 14 DAP compared to 7 DAP for Covington in 2015 and for Murasaki in both years. No. 1 and marketable yields of Covington were similar for 420 to 1,120 g ha–1linuron and nontreated check except marketable root yields in 2015. No. 1 and marketable sweetpotato yields of Murasaki decreased as application rates increased.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference26 articles.
1. Hahn RA (1992) Pre and postemergence control programs for annual weeds in soybeans. Page 117 in Proceedings of the Northeast Weed Sci Society, Boston, MA
2. ‘Covington’ sweetpotato;Yencho;HortScience,2008
3. Webster TM (2010) Weed survey—southern states vegetable, fruit and nut crops subsection. Page 256 in Proceedings of the Southern Weed Science Society. Little Rock, AR: Southern Weed Science Society
4. [NCDACS] North Carolina Department of Agriculture and Consumer Services (2015) Research Stations Annual Report 2015. http://www.ncagr.gov/Research/documents/2015_Annual_Report_000.pdf. Accessed: May 29, 2017
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