394-28 Indaziflam Sorption-Desorption In Diverse Soils.

Poster Number 540

See more from this Division: S11 Soils & Environmental Quality
See more from this Session: General Soil and Environmental Quality Posters: II
Wednesday, October 19, 2011
Henry Gonzalez Convention Center, Hall C
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Jennifer Rittenhouse, Soil and Water Managment Unit, United States Department of Agriculture - Agricultural Research Service, Saint Paul, MN, Diego Alonso, Universidade Estadual del Maringa, Maringa, Brazil, Pamela Rice, Soil & Water Managment Unit, United States Department of Agriculture - Agricultural Research Service, St. Paul, MN and William C. Koskinen, USDA-ARS, St. Paul, MN
Indaziflam is a new herbicide active ingredient, classified as a member of the new chemical class “alkylazine”. There is no published information on its fate and behavior in soil. This study is aimed at characterizing the adsorption and desorption of indaziflam in soils with different physical chemical properties. Three surface soils and three subsurface soils in Minnesota with varying soil properties (pH 5.8-7.6, 1-3% organic carbon, 3-23% clay) were used in the study. Adsorption-desorption studies were performed using the batch equilibration method. Sorption to soil was variable; Kd ranged from 5.7-19.6 mL/g. The surface soils had higher Kf values as compared to the subsurface soils. Normalization of sorption for OC reduced variability, but did not eliminate it. Desorption of indaziflam was hysteretic, indicating that sorption data alone will be not be sufficient to accurately predict its transport in soil. More work is needed to further characterize indaziflam adsorption-desorption in aged soils.
See more from this Division: S11 Soils & Environmental Quality
See more from this Session: General Soil and Environmental Quality Posters: II