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Devil's-Claw (Proboscidea louisianica) and Smellmelon (Cucumis melo var. dudaim) Control in Cotton (Gossypium hirsutum) with Pyrithiobac

Published online by Cambridge University Press:  12 June 2017

Eric P. Prostko  and
James M. Chandler
Eric P. Prostko
Affiliation:
Department of Soil and Crop Sciences, Texas Agricultural Experiment Station, College Station, TX 77843–2474
James M. Chandler
Affiliation:
Department of Soil and Crop Sciences, Texas Agricultural Experiment Station, College Station, TX 77843–2474
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Abstract

Devil's-claw and smellmelon are summer annual broadleaf weed problems in the southwest cotton production region. Field studies conducted in 1993 and 1994 evaluated the efficacy of pyrithiobac for postemergence (POST) control of devil's-claw and smellmelon compared with soil-applied fluometuron or prometryn. Pyrithiobac at 0.07 and 0.14 kg ai/ha early POST and 0.14 kg ai/ha mid-POST controlled devil's-claw more than 84% at the late rating. Devil's-claw control with mid-POST applications of pyrithiobac at 0.07 kg ai/ha was reduced when compared with other rates and application timings. Smellmelon control with pyrithiobac ranged from 57 to 84% and, except when applied at 0.07 kg ai/ha early POST, was equivalent to or greater than either fluometuron or prometryn. Crop injury with pyrithiobac treatments 16 d after treatment was 5 to 13%, but 33 d later, was no more than 3%.

Keywords

Fluometuron, N,N-dimethyl-N-[3-(trifluoromethyl) phenyl]ureaprometryn, N,N'-bis(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diaminepyrithiobac, sodium salt of 2-chloro-6-[(4,6-dimethoxy-2-pyrimidinyl)thio]benzoic aciddevil's-claw, Proboscidea louisianica (Mill.) Thellung # PROLOsmellmelon, Cucumis melo L. var. dudaim Naud. # CUMMDcotton, Gossypium hirsutum L. # GOSHI ‘Stoneville 825’and ‘Deltapine 50.’Weed managementfluometuronprometrynCUMMDPROLOGOSHIDAT, days after treatmentEPOST, early postemergenceMPOST, mid-postemergencePOST, postemergencePPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 19 - 22
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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