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Sensitivity of Adzuki Bean (Vigna angularis) to Preplant-Incorporated Herbicides

Published online by Cambridge University Press:  20 January 2017

Nader Soltani ,
Christy Shropshire ,
Darren E. Robinson  and
Peter H. Sikkema
Nader Soltani*
Affiliation:
Department of Plant Agriculture, Ridgetown College, University of Guelph, Ridgetown, ON N0P 2C0, Canada
Christy Shropshire
Affiliation:
Department of Plant Agriculture, Ridgetown College, University of Guelph, Ridgetown, ON N0P 2C0, Canada
Darren E. Robinson
Affiliation:
Department of Plant Agriculture, University of Guelph, Ridgetown, ON N0P 2C0, Canada
Peter H. Sikkema
Affiliation:
Department of Plant Agriculture, University of Guelph, Ridgetown, ON N0P 2C0, Canada
*
Corresponding author's E-mail: nsoltani@ridgetownc.uoguelph.ca
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Abstract

There is a limited number of herbicides available for weed control in adzuki bean production in Ontario, Canada. A total of six field trials were conducted in Ontario over a 2-yr period (2003 and 2004) to evaluate tolerance of adzuki bean to preplant incorporated (PPI) application of EPTC (4,400 and 8,800 g ai/ha), trifluralin (1,155 and 2,310 g ai/ha), dimethenamid (1,250 and 2,500 g ai/ha), S-metolachlor (1,600 and 3,200 g ai/ha), and imazethapyr (75 and 150 g ai/ha). All treatments, including the nontreated control, were maintained weed free during the growing season. EPTC and dimethenamid caused as much as 39% visual crop injury and reduced plant height, shoot dry weight, and yield up to 34, 63, and 38%, respectively. Maturity was delayed with the application of EPTC and dimethenamid. Trifluralin caused as much as 9% visual crop injury and decreased plant height up to 11%. There was no effect of trifluralin on shoot dry weight, seed moisture content, and yield. S-metolachlor caused as much as 19% visual crop injury, decreased plant height up to 23%, and reduced shoot dry weight up to 29%. Yield was not affected at the low rate but was decreased 19% at the high rate. There was no effect of S-metolachlor on maturity. Imazethapyr caused up to 6% visual injury but had no adverse effects on plant height, shoot dry weight, seed moisture content, and yield except at the high rate, which caused a 15% reduction in plant height. Based on these results, trifluralin and imazethapyr applied PPI have an adequate margin of crop safety for weed management in adzuki bean production in Ontario.

Keywords

DimethenamidEPTCimazethapyrS-metolachlor; trifluralinAdzuki bean, Vigna angularis.(Willd.) Ohwi and Ohashi ‘Erimo’crop injurytoleranceDAE, days after emergencePPI, preplant incorporated

Information

Type
Research Article
Information
Weed Technology , Volume 19 , Issue 4 , December 2005 , pp. 897 - 901
Copyright
Copyright © Weed Science Society of America 

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