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Sicklepod (Senna obtusifolia) Control and Seed Production after 2,4-DB Applied Alone and with Fungicides or Insecticides

Published online by Cambridge University Press:  20 January 2017

Sarah H. Lancaster ,
David L. Jordan ,
Janet F. Spears ,
Alan C. York ,
John W. Wilcut ,
David W. Monks ,
Roger B. Batts  and
Richard L. Brandenburg
Sarah H. Lancaster
Affiliation:
Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC 27695-7620
David L. Jordan*
Affiliation:
Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC 27695-7620
Janet F. Spears
Affiliation:
Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC 27695-7620
Alan C. York
Affiliation:
Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC 27695-7620
David W. Monks
Affiliation:
Department of Horticulture, North Carolina State University, Box 7609, Raleigh, NC 27695-7620
Roger B. Batts
Affiliation:
Department of Horticulture, North Carolina State University, Box 7609, Raleigh, NC 27695-7620
Richard L. Brandenburg
Affiliation:
Department of Entomology, Box 7613, North Carolina State University, Raleigh, NC 27695-7620
*
Corresponding author's E-mail: david_jordan@ncsu.edu
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Abstract

Experiments were conducted during 1999, 2002, and 2003 to evaluate sicklepod control by 2,4-DB applied alone or in mixture with selected fungicides and insecticides registered for use in peanut. The fungicides boscalid, chlorothalonil, fluazinam, propiconazole plus trifloxystrobin, pyraclostrobin, or tebuconazole and the insecticides acephate, carbaryl, esfenvalerate, fenpropathrin, lambda-cyhalothrin, methomyl, or indoxacarb applied in mixtures with 2,4-DB did not reduce sicklepod control by 2,4-DB compared with 2,4-DB alone. The fungicide azoxystrobin reduced control in some but not all experiments. Sicklepod control was highest when 2,4-DB was applied before flowering regardless of fungicide treatment. Seed production and germination were reduced when 2,4-DB was applied 81 to 85 d after emergence when sicklepod was flowering. Applying 2,4-DB before flowering and at pod set and pod fill did not affect seed production.

Keywords

Acephate, O,S-dimethyl acetylphosphoramidiothioatecarbaryl, 1-napthyl N-methylcarbamatechlorothalonil, tetrachloroisophthalonitrile2,4-DBsicklepod, Senna obtusifolia L. Irwin and Barneby # CASOBpeanut, Arachis hypogaea L.Pesticide interactionDAE, days after emergence
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 2 , June 2005 , pp. 451 - 455
Copyright
Copyright © Weed Science Society of America 

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