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Weed management with CGA-362622 in transgenic and nontransgenic cotton

Published online by Cambridge University Press:  20 January 2017

Dunk Porterfield ,
John W. Wilcut ,
Jerry W. Wells  and
Scott B. Clewis
Dunk Porterfield
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
Jerry W. Wells
Affiliation:
Syngenta Crop Protection, P.O. Box 18300, Greensboro, NC 27419
Scott B. Clewis
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
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Abstract

Field studies conducted at three locations in North Carolina in 1998 and 1999 evaluated crop tolerance, weed control, and yield with CGA-362622 alone and in combination with various weed management systems in transgenic and nontransgenic cotton systems. The herbicide systems used bromoxynil, CGA-362622, glyphosate, and pyrithiobac applied alone early postemergence (EPOST) or mixtures of CGA-362622 plus bromoxynil, glyphosate, or pyrithiobac applied EPOST. Trifluralin preplant incorporated followed by (fb) fluometuron preemergence (PRE) alone or fb a late POST–directed (LAYBY) treatment of prometryn plus MSMA controlled all the weed species present less than 90%. Herbicide systems that included soil-applied and LAYBY herbicides plus glyphosate EPOST or mixtures of CGA-362622 EPOST plus bromoxynil, glyphosate, or pyrithiobac controlled broadleaf signalgrass, entireleaf morningglory, large crabgrass, Palmer amaranth, prickly sida, sicklepod, and smooth pigweed at least 90%. Only cotton treated with these herbicide systems yielded equivalent to the weed-free check for each cultivar. Bromoxynil systems did not control Palmer amaranth and sicklepod, pyrithiobac systems did not control sicklepod, and CGA-362622 systems did not control prickly sida.

Keywords

BromoxynilCGA-362622, N-[(4,6-dimethoxy-2-pyrimidinyl) carbamoyl]-3-(2,2,2-trifluoroethoxy)-pyridin-2-sulfonamide sodium saltfluometuronglyphosateMSMAprometrynpyrithiobactrifluralinbroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash BRAPPentireleaf morningglory, Ipomoea hederacea var. integriuscula Gray IPOHGlarge crabgrass, Digitaria sanguinalis (L.) Scop. DIGSAPalmer amaranth, Amaranthus palmeri S. Wats. AMAPAprickly sida, Sida spinosa L. SIDSPsicklepod, Senna obtusifolia (L.) Irwin and Barneby CASOBsmooth pigweed, Amaranthus hybridus L. AMACHcotton, Gossypium hirsutum L. ‘Paymaster 1220 RR’, ‘Stoneville BXN 47’, ‘Stoneville 474’Herbicide-resistant crops
Type
Weed Management
Information
Weed Science , Volume 51 , Issue 6 , December 2003 , pp. 1002 - 1009
Copyright
Copyright © Weed Science Society of America 

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References

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