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Bermudagrass (Cynodon dactylon) and Johnsongrass (Sorghum halepense) Ecotype Response to Herbicides

Published online by Cambridge University Press:  12 June 2017

Steven M. Brown ,
James M. Chandler  and
David C. Bridges
Steven M. Brown
Affiliation:
Soil Crop Sci. Dep., Texas A&M Univ., College Station, TX 77843
James M. Chandler
Affiliation:
Soil Crop Sci. Dep., Texas A&M Univ., College Station, TX 77843
David C. Bridges
Affiliation:
Soil Crop Sci. Dep., Texas A&M Univ., College Station, TX 77843
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Abstract

Common bermudagrass [Cynodon dactylon (L.) Pers. #3 CYNDA] and johnsongrass [Sorghum halepense (L.) Pers. # SORHA] ecotypes were collected from seven locations in Texas. Ecotype responses to glyphosate [N-(phosphonomethyl)glycine], SC-0224 (trimethylsulfonium carboxymethylaminomethylphosphonate), sethoxydim {2-[l-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one}, fluazifop {(+)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, and quizalofop {(+)-2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy] propanoic acid} were evaluated in 1982, 1983, and 1984. Johnsongrass ecotype-by-herbicide interactions and ecotype differences were detected in only one of three years. Differences were observed consistently among the herbicide treatments. Numerous bermudagrass ecotype-by-herbicide interactions were detected each year with greater diversity occurring with less-than-optimum herbicide rates. The interactions were herbicide-by-ecotype specific and were not predictable with respect to geographic site of collection.

Keywords

ControlfluazifopglyphosatehaloxyfopquizalofopSC-0224sethoxydimCYNDASORHA.
Type
Research
Information
Weed Technology , Volume 1 , Issue 3 , July 1987 , pp. 221 - 225
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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