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Effect of Pyridate Formulation and Adjuvants on Broadleaf Weed Control in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  20 January 2017

Michael W. Edenfield ,
Daniel L. Colvin ,
Barry J. Brecke ,
Donn G. Shilling  and
Henry H. McLean
Michael W. Edenfield*
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL
Daniel L. Colvin
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL
Barry J. Brecke
Affiliation:
West Florida Research and Education Center, University of Florida, Jay, FL
Donn G. Shilling
Affiliation:
Mid-Florida Research and Education Center, University of Florida, Apopka, FL
Henry H. McLean
Affiliation:
Novartis Crop Protection, Inc., 2949 North County Road 1000E, Dewey, IL 61840
*
Corresponding author's E-mail: [email protected].
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Abstract

Field studies were conducted near Archer, FL, and Vienna, GA, in 1995 and 1996 to investigate the effects of pyridate formulation and adjuvants on broadleaf weed control in peanut (Arachis hypogaea). Pyridate formulations SAN 319H 450EC 361LZ, SAN 319H 450EC 216LZ, and SAN 319H 600EC 418LZ were evaluated at two rates, 1.07 and 2.14 kg/ha. Pyridate at 1.07 kg/ha plus 2,4-DB at 0.23 kg/ha were evaluated alone and with five adjuvants. The adjuvants included a crop oil concentrate, a nonionic surfactant, a nonionic surfactant with organosilicone blend, urea ammonium nitrate plus a nonionic surfactant, and chlorothalonil (a fungicide) plus a nonionic surfactant. No pyridate treatment injured peanut. Pyridate formulation did not affect broadleaf weed control. Increasing pyridate rate increased weed control and yield. Mixing 2,4-DB with pyridate generally enhanced sicklepod (Senna obtusifolia) and common cocklebur (Xanthium strumarium) control. Florida beggarweed (Desmodium tortuosum), smallflower morningglory (Jacquemontia tamnifolia), hairy indigo (Indigofera hirsuta), sicklepod, and common cocklebur control with pyridate was not enhanced by adjuvants. Adding chlorothalonil to pyridate plus 2,4-DB did not affect weed control or peanut injury.

Keywords

2,4-DB; chlorothaloniltetrachloroisophthalonitrilepyridatecommon cocklebur, Xanthium strumarium # XANSTFlorida beggarweed, Desmodium tortuosum # DEDTOhairy indigo, Indigofera hirsuta # INDHIpeanut, Arachis hypogaea ‘Sunrunner’ and ‘GK-7’sicklepod, Senna obtusifolia # CASOBsmallflower morningglory, Jacquemontia tamnifolia # IAQTASAN 319H 450EC 361LZSAN 319H 450EC 216LZSAN 319H 600EC 418LZcrop oil concentratenonionic surfactantorganosilicone-nonionic surfactant blendurea ammonium nitrateCOC, crop oil concentrateNIS, nonionic surfactantNIS/OS, nonionic surfactant with organosiliconePOST, postemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 15 , Issue 3 , September 2001 , pp. 419 - 423
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: P.O. Box 7, Cantonment, FL 32533

References

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