Retention, Absorption, and Loss of Foliage-Applied Metribuzin

Immediately following postemergence application, similar quantities of metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] were retained on the foliage of downy brome (Bromus tectorum L. # BROTE) and winter wheat (Triticum aestivum L.). Three days following treatment, m...

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Bibliographic Details
Published in:Weed science 1987-11, Vol.35 (6), p.775-779
Main Authors: Devlin, Daniel L., Gealy, David R., Morrow, Larry A.
Format: Article
Language:English
Subjects:
Agrology
APLICACION FOLIAR
APPLICATION FOLIAIRE
BROMUS TECTORUM
ESTADOS UNIDOS DE AMERICA
ETATS-UNIS
FOLIAR APPLICATION
HERBICIDAS
HERBICIDE
HERBICIDES
Leaves
METABOLISM
METABOLISME
METABOLISMO
Photodecomposition
Physiology, Chemistry, and Biochemistry
Radiocarbon
Rain
RESIDU
RESIDUES
RESIDUOS
Sunlight
Surfactants
TRITICUM AESTIVUM
USA
Vaporizing
WASHINGTON
Wheat
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Summary:Immediately following postemergence application, similar quantities of metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] were retained on the foliage of downy brome (Bromus tectorum L. # BROTE) and winter wheat (Triticum aestivum L.). Three days following treatment, more metribuzin was present on the surface of the foliage of downy brome than of winter wheat and similar quantities of metribuzin had been absorbed into the interior of the foliage of both species. Fourteen days after treatment, metribuzin had disappeared from the surfaces of the foliage of both species but more metribuzin was present in the interior of the foliage of downy brome than of winter wheat. Results from petri dish studies in the field suggested that the amount of unaltered metribuzin available for absorption by leaves was influenced primarily by volatilization and secondarily by photodecomposition. In addition, small quantities of rainfall may have washed metribuzin from leaf surfaces. In 1984, yield of winter wheat was greater in metribuzin-treated plots than in nontreated check plots.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500079327