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Moisture Stress Effects on Absorption and Translocation of Four Foliar-Applied Herbicides

Published online by Cambridge University Press:  12 June 2017

Daniel B. Reynolds ,
Trina G. Wheless ,
E. Basler  and
Don S. Murray
Daniel B. Reynolds
Affiliation:
La. State Univ. Agric. Cent. N.E. Res. Stn., St. Joseph, LA 71366
Trina G. Wheless
Affiliation:
USDA, Stillwater, OK 74078
E. Basler
Affiliation:
Dep. Bot., Okla. State Univ, Stillwater, OK 74078
Don S. Murray
Affiliation:
Dep. Agron., Okla. State Univ., Stillwater, OK 74078
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Abstract

Laboratory experiments with 14C-herbicides were conducted with grain sorghum as an indicator species to determine the effects of imposed moisture stress on absorption, precent recovery, and acropetal and basipetal translocation of the butyl ester of fluazifop, the methyl ester of haloxyfop, the ethyl ester of quizalofop, and sethoxydim. Haloxyfop was the only herbicide where recovery decreased between the 3-and 48-h interval. All plants absorbed more of the herbicide at the 48-h interval than at the 3- or 6-h interval under both stressed and non-stressed conditions. Increased drought stress caused more acropetal movement with fluazifop and sethoxydim and less acropetal movement with quizalofop at the 3-h interval. Basipetal transloation, although different among herbicides, responded similarly to imposed moisture stress, which decreased basipetal translocation approximately 19%.

Keywords

fluazifop, (±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanic acidhaloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acidquizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy] propanoic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onegrain sorghum, Sorghum bicolor (L.) Moench. ‘Acco BRY 90’Translocationwater stressgraminicidesfluazifophaloxyfopquizalofopsethoxydim
Type
Research
Information
Weed Technology , Volume 2 , Issue 4 , October 1988 , pp. 437 - 441
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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