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Biologically Effective Dose and Selectivity of SAN 1269H (BAS 662H) for Weed Control in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Peter H. Sikkema ,
Stevan Z. Knezevic ,
Allan S. Hamill ,
François J. Tardif ,
Kevin Chandler  and
Clarence J. Swanton
Peter H. Sikkema
Affiliation:
Ridgetown College, University of Guelph, Ridgetown, ON, Canada NOP 2C0
Stevan Z. Knezevic
Affiliation:
Crop Science Division, Department of Plant Agriculture, University of Guelph, ON, Canada N1G 2W1
Allan S. Hamill
Affiliation:
Agriculture and Agri-Food Canada, Harrow, ON, Canada N0R 1G0
François J. Tardif
Affiliation:
Crop Science Division, Department of Plant Agriculture, University of Guelph, ON, Canada N1G 2W1
Kevin Chandler
Affiliation:
Crop Science Division, Department of Plant Agriculture, University of Guelph, ON, Canada N1G 2W1
Clarence J. Swanton*
Affiliation:
Crop Science Division, Department of Plant Agriculture, University of Guelph, ON, Canada N1G 2W1
*
Corresponding author's E-mail: [email protected].
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Abstract

Field experiments were conducted in 1996 and 1997 at five locations in southwestern Ontario to develop dose-response curves for SAN 1269H (SAN 835H plus dicamba) for weed control and crop tolerance in corn. SAN 1269H controlled wild buckwheat (Polygonum convolvulus L.), common ragweed (Ambrosia artemisiifolia L.), common lambsquarters (Chenopodium album L.), pigweeds (Amaranthus retroflexus L. and A. powellii S. Wats.), barnyardgrass [Echinochloa crus-galli (L.) Beauv.], and yellow foxtail [Setaria glauca (L.) Beauv.]. Biologically effective doses of SAN 1269H (BAS 662H) were 440, 430, 180, and 40 g/ha for yellow foxtail, barnyard grass, wild buckwheat, and common ragweed, respectively. The biologically effective dose (that which provides 90% reduction in weed dry matter) for common lambsquarters was 560 g/ha when SAN 1269H was applied preemergence (PRE) and 110 g/ha when applied postemergence (POST). When applied PRE at a rate of 420 g/ha, pigweed was controlled, whereas only 85 g/ha was required when applied POST. Grain yield increased with dose of SAN 1269H and did not differ with time of application. Temporary crop injury was observed when SAN 1269H was applied at the four- to six-leaf growth stage. Optimum corn yields were achieved with doses of 100 to 250 g/ha.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidglyphosate, N-(phosphonomethyl)glycineSAN 582H, 2-chloro-N[(1-methyl-2-methoxy)ethyl]-N-(2,4-dimethyl-thien-3-yl)-acitamideSAN 835H, 2-[1-[[[(3,5-difluorophenyl)amino]carbonyl]hydrozono]ethyl]-3-pyridinecarboxylic acidSAN 1269 (BAS 662H), a mixture of SAN 835H and dicambacorn, Zea mays (L.)green pigweed, Amaranthus powellii S. Wats. #AMAPOredroot pigweed, Amaranthus retroflexus L. # AMAREcommon lambsquarters, Chenopodium album L. # CHEALyellow foxtail, Setaria glauca (L.) Beauv. # SETGLwild buckwheat, Polygonum convolvulus L. # POLCObarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCRcommon ragweed, Ambrosia artemisiifolia L. # AMBELDicambaglyphosatenicosulfuronrimsulfuronRPA 201772SAN 582HSAN 835HDAE, days after emergenceDAT, days after treatmentDM, dry matterI90, biologically effective dose to provide 90% reduction in weed dry matterIWM, integrated weed managementPOST, postemergencePRE, preemergence
Type
Research
Information
Weed Technology , Volume 13 , Issue 2 , June 1999 , pp. 283 - 289
Copyright
Copyright © 1999 by the Weed Science Society of America 

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