Sulfentrazone Adsorption and Mobility in Surface Soil of The Southern United States

Abstract

Sulfentrazone adsorption and mobility in six soils with varying soil properties were evaluated under laboratory conditions. Adsorption was evaluated using a modified slurry technique. Mobility was evaluated using packed-soil columns under saturated flow conditions. The order of adsorption to soil was Sequatchie loam > Dothan loamy sand = Bosket fine sandy loam > Malden loamy sand > Commerce silty clay loam > Harkey clay loam. Greater sulfentrazone adsorption occurred in soils with lower pH. Sulfentrazone movement under saturated flow conditions in 27-cm soil-packed columns was greater in soils with low adsorption, high pH, and coarse texture. Sulfentrazone movement was limited in the Sequatchie loam but was greater in the other soils examined. No clear relationship was evident between sulfentrazone mobility and adsorption in these soils.

Seletividade e eficiência de herbicidas aplicados em pré-emergência na cultura da mandioca

“…Estes resultados podem ser justificados devido ao fato de o flumioxazin (Kow 2,55), metolachlor (Kow 3,05) e sulfentrazone (Kow 1,48) apresentarem va- (Oliveira et al 1998, Liu et al 2001, Ohmes & Mueller 2007, Szmigielski et al 2009). Biffe et al (2010) verificaram que o S-metolachlor (1.920 g ha -1 ) foi seletivo para as cultivares 'Fécula Branca' e 'Fibra', quando aplicado em pré--emergência, em condições de solo arenoso.…”

Weed Control and Crop Safety with Premixed <i>S</i>-Metolachlor and Sulfentrazone in Sunflower

“…Lower control of Palmer amaranth with F7583 applied preplant at Manhattan compared to Hays could be due to higher weed density (data not shown) and lower soil pH (6.8) than at Hays (7.8). Greater sulfentrazone adsorption occurs in soils with lower pH [10]. Sulfentrazone is a weak acid and its concentration in soil solution increases as soil pH increases and is available for root uptake by plants [11].…”

Residual activity of herbicides used in soybean agriculture on grain sorghum crop succession

“…Evaluating the sulfentrazone herbicide behavior in soil, Szmigielski et al (2009) observed that this herbicide presents a high bioactivity in soils with low tenor of organic matter and clay, where its residual activity could overcome 302 days, fact also observed by Blanco & Velini (2005). To Ohmes & Mueller (2007), the sulfentrazone sorption is more intense in clayvey soils.…”