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Temperature Effects on Translocation Patterns of Several Herbicides within Quackgrass (Agropyron repens)

Published online by Cambridge University Press:  12 June 2017

K. Neil Harker  and
Jack Dekker
K. Neil Harker
Affiliation:
Crop Sci. Dep., Univ. Guelph, Ontario, Canada N1G 2W1
Jack Dekker
Affiliation:
Crop Sci. Dep., Univ. Guelph, Ontario, Canada N1G 2W1
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Abstract

A growth cabinet study was conducted to evaluate the effect of temperature on the distribution of several herbicides in quackgrass. Uniformly labeled 14C-sucrose and the radiolabeled herbicides glyphosate, sethoxydim, cloproxydim, the butyl ester of fluazifop, the methyl ester of haloxyfop, and the ethyl ester of quizalofop were applied to quackgrass grown at three day / night temperature regimes (10/5, 20/15, and 30/25 C). Seven days after treatment the plants were harvested, lyophilized, and later sectioned, mapped, and oxidized in preparation for 14C quantification. Quackgrass rhizome growth was more vigorous at 20/15 than 30/25 or 10/5 C. of the herbicides tested, haloxyfop was the most inhibitory to rhizome growth. Temperature increases from 10/5 to 20/15 or from 20/15 to 30/25 C resulted in more translocation to shoots. Increasing temperature had various effects on translocation to rhizomes depending on the chemical applied. At all three temperature regimes, more 14C was recovered from distal than basal buds in plants treated with 14C-sethoxydim. In contrast, at all three temperature regimes, similar amounts of 14C were recovered from the distal and basal buds of plants treated with 14-C-sucrose.

Keywords

Quackgrass, Agropyron repens (L.) Beauv. #3 AGRREsucrose, α-glucopyranosyl-β-D-fructofuranosideglyphosate, N-(phosphonomethyl)-glycinesethoxydim, 2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)-propyl]-3-hydroxy-2-cyclohexen-1-onecloproxydim, (E,E)-2-[1-[[(3 - chloro-2-propenyl)oxy] imino] butyl] -5- [2 -(ethylthio) propyl] -3-hydroxy-2-cyclohexen-1-onefluazifop (±)-2-[4-[[5 - (trifluoromethyl) - 2 - pyridinyl] oxy] phenoxy] propanoic acidhaloxyfop, 2-[4-[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acidquizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy] propanoic acidRhizomebudssucroseglyphosatesethoxydimcloproxydimfluazifophaloxyfopquizalofopgraminicidesAGRRE
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 36 , Issue 5 , September 1988 , pp. 545 - 552
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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