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Use of Mixtures of Mesotrione, Imazethapyr, and Imazethapyr plus Imazapyr in Imidazolinone-Resistant Corn (Zea mays)

Published online by Cambridge University Press:  20 January 2017

Gregory R. Armel ,
Henry P. Wilson ,
Robert J. Richardson  and
Thomas E. Hines
Gregory R. Armel
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
Henry P. Wilson*
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
Robert J. Richardson
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
Thomas E. Hines
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
*
Corresponding author's E-mail: hwilson@vt.edu
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Abstract

Field studies were conducted in 1999, 2000, and 2001 to evaluate mesotrione at 105 and 210 g ai/ha alone and in mixtures with imazethapyr at 70 g ai/ha and the prepackage mixture of imazethapyr at 47 g/ha plus imazapyr at 16 g ai/ha postemergence. Mixtures of mesotrione with imazethapyr and imazethapyr plus imazapyr controlled common ragweed, common lambsquarters, and morningglory species better than imazethapyr or imazethapyr plus imazapyr alone. Similarly, mixtures of mesotrione with these imidazolinone herbicides improved the control of giant foxtail over that by mesotrione alone. Crop injury did not exceed 11% with all treatments and appeared as transient stunting. Yields of corn treated with mixtures of mesotrione plus imidazolinone herbicides were highest in 2000 and 2001, when rainfall was higher than in 1999.

Keywords

Imazapyrimazethapyrmesotrionecommon lambsquarters, Chenopodium album L. #3 CHEALcommon ragweed, Ambrosia artemisiifolia L. # AMBELgiant foxtail, Setaria faberi Herrm. # SETFAmorningglory species, Ipomoea spp. # IPOSScorn, Zea mays L. ‘Pioneer 3395 IR’, ‘Pioneer 32Z1B IR’Imidazolinone herbicidesIpomoea hederacea (L.) Jacq.Ipomoea lacunosa L.Ipomoea purpurea (L.) RothIPOHEIPOLAIPOPUtotal postemergencetriketone herbicidesDAT, days after treatmentPOST, postemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 17 , Issue 4 , December 2003 , pp. 674 - 679
Copyright
Copyright © Weed Science Society of America 

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