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

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 o...

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Bibliographic Details
Published in:Weed science 1987-09, Vol.35 (5), p.599-603
Main Authors: Maroder, Horacio L., Prego, Imelda A., Cairoli, Maria A.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Chemical control
CYNODON DACTYLON
Esters
ESTOLON
Fundamental and applied biological sciences. Psychology
HERBICIDAS
HERBICIDE
HERBICIDES
Leaves
Parasitic plants. Weeds
Physiology, Chemistry, and Biochemistry
Phytopathology. Animal pests. Plant and forest protection
Radioactive decay
Radiocarbon
Relative humidity
Sorghum
STOLON
STOLONS
Summer
TECHNIQUE DES TRACEURS
TECNICAS DE AISLAMIENTO DE ISOTOPOS
TRACER TECHNIQUES
Vaporizing
Weeds
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Summary: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.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500060641