Phytotoxicity and Adsorption of Chlorsulfuron as Affected by Soil Properties

The phytotoxicity of chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl] benzenesulfonamide} was compared in six soils, and the relationship of activity to soil physical and chemical properties was evaluated. The influence of soil pH (4.2 to 7.8) on phytotoxicity and a...

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Bibliographic Details
Published in:Weed science 1985-07, Vol.33 (4), p.564-568
Main Authors: Mersie, Wondimagegnehu, Foy, Chester L.
Format: Article
Language:English
Subjects:
Acid soils
ADSORCION
ADSORPTION
Agricultural soils
BIOASSAY
Biological and medical sciences
Chemical control
CHIMIE DU SOL
Clay soils
DESORCION
DESORPTION
ENSAYO BIOLOGICO
ESSAI BIOLOGIQUE
FITOTOXICIDAD
Fundamental and applied biological sciences. Psychology
HERBICIDAS
HERBICIDE
HERBICIDES
Organic soils
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
PHYTOTOXICITE
PHYTOTOXICITY
QUIMICA DEL SUELO
Soil biochemistry
SOIL CHEMISTRY
Soil organic matter
Soil toxicity
Soil, Air, and Water
Weeds
ZEA MAYS
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Summary:The phytotoxicity of chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl] benzenesulfonamide} was compared in six soils, and the relationship of activity to soil physical and chemical properties was evaluated. The influence of soil pH (4.2 to 7.8) on phytotoxicity and adsorption of chlorsulfuron incorporated into high-organic-matter soil was also studied. For the phytotoxicity studies, corn (Zea mays L. ‘Pioneer 3320’) was used as the bioassay plant. Organic matter was the soil variable most highly correlated with chlorsulfuron phytotoxicity. There was an inverse relationship between phytotoxicity and organic matter. No significant relationship between clay content and chlorsulfuron toxicity was observed. The adsorption of chlorsulfuron decreased with increasing soil pH while desorption was greater at alkaline pH. Phytotoxicity of chlorsulfuron increased with increasing soil pH and reached a maximum at pH 6.9.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500082850