Absorption, Translocation, and Toxicity of Glyphosate and Oxyfluorfen in Yellow Nutsedge (Cyperus esculentus)

The potential for yellow nutsedge (Cyperus esculentus L. var. leptostachyus Boeck. # CYPES) regrowth was reduced by increasing plant age and by glyphosate [N-(phosphonomethyl)glycine] and oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene]. Of the amount of glyphosate trans...

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Bibliographic Details
Published in:Weed science 1986-11, Vol.34 (6), p.923-929
Main Authors: Pereira, Welington, Crabtree, Garvin
Format: Article
Language:English
Subjects:
ABSORCION
ABSORPTION
Biological and medical sciences
Chemical control
CHLOROPHYLLE
CHLOROPHYLLS
CLOROFILAS
CRECIMIENTO
CROISSANCE
CYPERUS ESCULENTUS
FITOTOXICIDAD
Fundamental and applied biological sciences. Psychology
GROWTH
HERBICIDAS
HERBICIDE
HERBICIDES
Leaves
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
PHYTOTOXICITE
PHYTOTOXICITY
Plant anatomy
Plant roots
Plants
Radioactive decay
Regrowth
Rhizomes
TRANSLOCACION
TRANSLOCATION
Tubers
Weed Control and Herbicide Technology
Weeds
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Summary:The potential for yellow nutsedge (Cyperus esculentus L. var. leptostachyus Boeck. # CYPES) regrowth was reduced by increasing plant age and by glyphosate [N-(phosphonomethyl)glycine] and oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene]. Of the amount of glyphosate transported to underground parts, most was found in the tubers, with immature rhizomes, roots, and tubers having 2 to 3 times higher concentrations than comparable mature tissues. Addition of unlabeled oxyfluorfen as a tank mixture with glyphosate increased absorption and translocation, mainly into leaves and new tubers, of radioactivity from 14C-glyphosate in 30-day-old plants. In contrast to the younger plants, the addition of oxyfluorfen decreased 14C-glyphosate detected in 60-day-old plants. The greater effectiveness of glyphosate when applied with oxyfluorfen on yellow nutsedge at the early growth stage has important implications in the field because the tuberization process must be stopped early in the development of the plant for successful control.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500068119