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Mesotrione Combinations in No-Till 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: [email protected]
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Abstract

Field studies were conducted in 1999, 2000, and 2001 to determine the effectiveness of mesotrione applied preemergence (PRE) or postemergence (POST) in no-till corn. Also, a proposed prepackage mix of mesotrione plus acetochlor (1:11 ratio of mesotrione–acetochlor) in combinations with the trimethylsulfonium salt of glyphosate (glyphosate-TMS), paraquat, and 2,4-D was investigated. Mesotrione PRE at 235 g ai/ha or greater controlled common lambsquarters, smooth pigweed, and common ragweed at least 80%. POST mesotrione at 35 g/ha and higher controlled common lambsquarters 91% or greater. Mesotrione applied POST at 140 g/ha controlled smooth pigweed greater than 97%. Common ragweed control from POST mesotrione was inconsistent, ranging from 56 to 97%. PRE and POST applications of mesotrione did not adequately control goosegrass, giant foxtail, fall panicum, johnsongrass, or cutleaf eveningprimrose. The mesotrione plus acetochlor prepackage mix plus glyphosate-TMS or paraquat controlled field pansy and ivyleaf morningglory similar to or better than did the prepackage mixture of the isopropylamine salt of glyphosate (glyphosate-IPA) plus atrazine plus acetochlor. But common ragweed control by mesotrione plus acetochlor plus glyphosate-TMS or paraquat was occasionally lower than control by the prepackage mixture of glyphosate-IPA plus atrazine plus acetochlor. Corn injury was generally less than 10% with PRE and POST mesotrione applications.

Keywords

Acetochloratrazine2,4-Dglyphosate-Ipa (isopropylamine salt of glyphosate)glyphosate-TMS (trimethylsulfonium salt of glyphosate)mesotrioneparaquatcommon lambsquarters, Chenopodium album L. #3 CHEALcommon ragweed, Ambrosia artemisiifolia L.# AMBELcutleaf eveningprimrose, Oenothera laciniata Hill # OEOLAfall panicum, Panicum dichotomiflorum Michx. # PANDIfield pansy, Viola arvensis Murr. # VIOARgiant foxtail, Setaria faberi Herrm. # SETFAgoosegrass, Eleusine indica (L.) Gaertn # ELEINivyleaf morningglory, Ipomoea hederacea (L.) Jacq. # IPOHEjohnsongrass, Sorghum halepense (L.) Pers. #SORHAsmooth pigweed, Amaranthus hybridus L. # AMACHcorn, Zea mays L.Bleaching herbicidesburndownnonselective herbicidestriketone herbicidesCOC, crop-oil concentrateDAT, days after treatmentfb, followed byPRE, preemergencePOST, postemergenceUAN, urea ammonium nitrateWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 17 , Issue 1 , March 2003 , pp. 111 - 116
Copyright
Copyright © Weed Science Society of America 

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