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Behavior of 14C-Haloxyfop in Common Bermudagrass (Cynodon dactylon) Stolons

Published online by Cambridge University Press:  12 June 2017

Horacio L. Maroder ,
Imelda A. Prego  and
Maria A. Cairoli
Horacio L. Maroder
Affiliation:
Plant Physiol., Unidad Fisiologia Vegetal, Departamento de Botanica, CIRN, INTA, Castelar, Buenos Aires, Argentina
Imelda A. Prego
Affiliation:
Plant Physiol., Unidad Fisiologia Vegetal, Departamento de Botanica, CIRN, INTA, Castelar, Buenos Aires, Argentina
Maria A. Cairoli
Affiliation:
Plant Physiol., Unidad Fisiologia Vegetal, Departamento de Botanica, CIRN, INTA, Castelar, Buenos Aires, Argentina
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Abstract

The behavior of the methyl ester of 14C-haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} in common bermudagrass [Cynodon dactylon (L.) Pers. # CYNDA] stolons was examined in greenhouse experiments at two different seasons. The 14C from the herbicide applied on the leaves of a stolon node translocated no more than 3% of the applied radioactivity to the apex and base. Movement out of stolons was not significant. In early summer less than 1% translocated in each direction; in early fall more than 2% moved to the apex and less than 1% toward the base. Decrease of 14C recovery with time was evident in both seasons, particularly in early summer. Haloxyfop volatilization from the leaf surface apparently plays a significant role in recovery decrease. The 14C found in stolons in early summer was approximately the same as that of early fall, although herbicide remaining available for uptake on the leaf surface was lower in the former season. We suggest that environmental conditions that favor volatilization could enhance uptake.

Keywords

TranslocationvolatilizationCYNDA
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 5 , September 1987 , pp. 599 - 603
Copyright
Copyright © 1987 by the Weed Science Society of America 

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