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The Effect of Site of Application of 14C-Fluazifop on Its Uptake and Translocation by Quackgrass (Agropyron repens)

Published online by Cambridge University Press:  12 June 2017

Nimal R. Chandrasena  and
Geoff R. Sagar
Nimal R. Chandrasena
Affiliation:
School of Plant Biology, Univ. College of North Wales, Bangor, Gwynedd, U.K.
Geoff R. Sagar
Affiliation:
School of Plant Biology, Univ. College of North Wales, Bangor, Gwynedd, U.K.
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Abstract

The effect of site of application on uptake and translocation of the butyl ester of fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy] phenoxy] propanoic acid} by quackgrass [Agropyron repens (L.) Beauv. # AGRRE] was investigated using 14C-labeled herbicide and intact plants. Uptake and distribution of the label were significantly greater from the abaxial than from the adaxial surface of leaves. The addition of a nonionic surfactant4 to the treatment solution increased the uptake significantly only through the adaxial surface. Uptake of 14C by the apical, middle, and basal regions of the treated leaf lamina did not differ significantly. However, movement of the 14C-label to stem areas and leaves both above and below treated leaves was greater from lamina base applications than from treatments to the lamina apex and middle. The older leaves absorbed more herbicide than did younger leaves, but the pattern of translocation did not differ. Considerably greater translocation occurred from treatments to the outside of the leaf sheaths in the lower regions of the stem than from applications to the upper leaf sheaths, with the 14C-label moved to young and old leaves, roots, and rhizomes. Uptake from applications to the outside of the upper leaf sheaths also resulted in improved translocation mainly within the stem areas and into upper leaves.

Keywords

AGRRE
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 4 , July 1987 , pp. 457 - 462
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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