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Chemical Control Systems for Coffee Senna (Cassia occidentalis) in Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  12 June 2017

Andrew Keeton ,
Edward C. Murdock ,
Gregory S. Stapleton  and
Joe E. Toler
Andrew Keeton
Affiliation:
Dep. Agron., Clemson Univ., Clemson, SC 29634
Edward C. Murdock
Affiliation:
Dep. Agron., Clemson Univ., Clemson, SC 29634
Gregory S. Stapleton
Affiliation:
Dep. Agron., Clemson Univ., Clemson, SC 29634
Joe E. Toler
Affiliation:
Dep. Exp. Stat., Clemson Univ., Clemson, SC 29634
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Abstract

Field experiments were established to evaluate coffee senna control in cotton with registered PRE, early POST-directed (EPD), and late POST-directed (LPD) herbicides and with pyrithiobac applied PRE and early POST. Fluometuron and norflurazon applied PRE controlled coffee senna 87 and 65%, respectively, 6 wk after planting (WAP). Methazole applied EPD controlled coffee senna 96% 2 wk after application, whereas fluometuron and MSMA applied EPD controlled 70 and 16%, respectively. LPD applications of cyanazine, diuron, and prometryn averaged only 45% control 8 WAP. MSMA applied LPD controlled coffee senna only 12%. Fluometuron and norflurazon applied PRE followed by methazole applied EPD and cyanazine applied LPD controlled coffee senna 98 and 99% 6 WAP, respectively. PRE, early POST, and PRE followed by early POST applications of pyrithiobac controlled coffee senna 88, 89, and 95% 6 WAP, respectively. Seed cotton yields were similar to weed-free cotton with all treatments except MSMA applied EPD and the LPD treatments, all of which provided unacceptable (12 to 49%) control 8 WAP.

Keywords

Cyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitrilediuron, N-(3,4-dichlorophenyl)-N,N-dimethylureafluometuron, N,N-dimethyl-N'-[3-(trifluoromethyl)phenyl]ureamethazole, 2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dioneMSMA, monosodium salt of methylarsonic acidnorflurazon, 4-chloro-5-(methylamino)-2-(3-trifluoromethyl)phenyl)-3(2H)-pyridazinoneprometryn, N,N-bis(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diaminepyrithiobac, 2-chloro-6-[(4,6-dimethoxy-2-pyrimidinyl)thio] benzoic acidtrifluralin, 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenaminecoffee senna, Cassia occidentalis L. ♯3CASOCcotton, Gossypium hirsutum L. ‘Acala 90,’ ‘Deltapine 5313.’Sequential treatmentscyanazinediuronfluometuronmethazoleMSMAnorflurazonprometrynpyrithiobactrifluralin
Type
Research
Information
Weed Technology , Volume 10 , Issue 3 , September 1996 , pp. 550 - 555
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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