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Quinclorac for Cheat (Bromus secalinus) Control in Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

Lora M. Franetovich  and
Thomas F. Peeper
Lora M. Franetovich
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Thomas F. Peeper
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

Thirteen field experiments were conducted to evaluate quinclorac for cheat control in hard red winter wheat. Cheat control with quinclorac was variable. Quinclorac at 560 and 1120 g a.i./ha applied to tillered wheat controlled cheat 93 to 100% at four sites. In contrast, pooled over four other experiments and four application times, quinclorac at 420 g/ha and 560 g/ha controlled cheat only 20 and 31%, respectively. Quinclorac at 420 g/ha plus chlorsulfuron:metsulfuron (5:1) at 35 g a.i./ha applied PRE increased wheat yield 28% at one of three sites. At two of these sites, averaged over chlorsulfuron:metsulfuron rates of 0, 18, and 35 g a.i./ha, quinclorac at 280 and 420 g/ha applied POST, increased wheat yield 32 to 112%. In two cultivar tolerance experiments, quinclorac treatments did not damage any cultivar. Pooled over cultivars, yields were increased 7 and 10% when quinclorac at 280 and 560 kg/ha was applied, respectively. In a greenhouse experiment, quinclorac plus dicamba or esfenvalerate consistently reduced the leaf area of cheat in a manner suggesting synergistic effects. Of eight adjuvants evaluated in a laboratory experiment, only quinclorac plus the adjuvant BCH 864 01S reduced cheat leaf area more than quinclorac alone.

Keywords

BCH 864 01S, chemistry not availablechlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamidedicamba, 3,6-dichloro-2-methoxybenzoic acidesfenvalerate, (S)-cyano(3-phenoxyphenyl)methyl(S)-4-chloroalpha-(1-methylethyl)benzene acetatemetsulfuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acidquinclorac, 3,7-dichloro-8-quinolinecarboxylic acidcheat, Bromus secalinus L. # BROSEwheat, Triticum aestivum L.SynergismchlorsulfurondicambaesfenvalerateethylmetribuzinMCPAmetribuzinmetsulfuronpicloramBROSE
Type
Research
Information
Weed Technology , Volume 9 , Issue 1 , March 1995 , pp. 131 - 140
Copyright
Copyright © 1995 by the Weed Science Society of America 

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