Evaluation of leaching behavior of pendimethalin in sandy loam soil

Chopra, Indu; Kumari, Beena; Sharma, Sanjeev

doi:10.1007/s10661-008-0662-2

Cited by 22 publications

(10 citation statements)

References 13 publications

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“…500 L kg À1 ), so it is not surprising that the herbicide showed minimal leaching. This same phenomenon has been reported by others (Chopra et al 2010;Lin et al 2007;Simmons et al 2007;Smith et al 1995), and pendimethalin is classified as a nonleaching herbicide (Weber 1990). …”

Section: Resultssupporting

confidence: 81%

Field Dissipation of Sulfentrazone and Pendimethalin in Colorado

Shaner

2012

Weed technol.

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Pendimethalin and sulfentrazone are applied PRE in sunflower to control many grasses and broadleaf weeds. These herbicides have quite different physicochemical properties. Pendimethalin has a high carbon-referenced sediment partition coefficient (Koc)(17,200 L kg−1), with a low leaching potential, whereas sulfentrazone has a low Koc(43 L kg−1), with a high leaching potential. A 2-yr study was conducted to determine the dissipation of these two herbicides applied to a loamy sand soil. Pendimethalin dissipated in two phases, an initial rapid loss between application and 3 to 5 d after application (DAT) and then a slower rate of dissipation. The first, rapid phase was likely due to volatilization of the herbicide from the soil surface. Pendimethalin dissipated at a similar rate for the slower phase in 2008 and 2010 (time to 50% dissipation [DT50] was 43 d and 39 d, respectively). The dissipation of sulfentrazone, unlike pendimethalin, was not biphasic. The DT50for sulfentrazone was different between the 2 yr (30 d and 14 d in 2008 and 2010, respectively). Pendimethalin remained primarily in the top 7.5 cm of the soil column, whereas sulfentrazone leached to at least 30 cm. The leaching of sulfentrazone depended on the timing of irrigation or precipitation after application. The more rapid loss of sulfentrazone in the top 30 cm of the soil column in 2010 could have been partially due to the herbicide leaching below the 30 cm depth that was sampled.

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Section: Resultssupporting

confidence: 81%

Field Dissipation of Sulfentrazone and Pendimethalin in Colorado

Shaner

2012

Weed technol.

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“…Research shows that pendimethalin, as a commercial EC formulation (Panida 330 EC), has the ability to move in soil, which is confirmed by studies of Chopra et al (2010). Use of pendimethalin immobilized in alginate matrix minimizes this process according to studies conducted (Włodarczyk 2011).…”

Section: Resultssupporting

confidence: 53%

“…A strong influence on behavior of an active substance in the environment is the formulation of a pesticide, whose components such as synergists, buffers, activators, organic solvents, adsorbents, fillers, or adjuvants, modify the physical and chemical properties of the active substance (Mulqueen 2003; Green and Beestman 2007; Knowles 2008). According to numerous studies, these compounds have an effect on availability, durability, mobility, and, in consequence, biologic characteristics of the pesticides (Reddy 1993; Beulke and Malkomes 2001; El-Nahhal 2003; Sondhia 2009; Chopra et al 2010; Kucharski and Sadowski 2011). Furthermore, the application rates for conventional pesticide formulations, during the time required for weed control, are generally higher than the minimum threshold to counter losses from degradation, leaching, volatilization, and adsorption (Maqueda et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Influence of formulation on mobility of metazachlor in soil

Włodarczyk

2014

Environ Monit Assess

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The mobility of metazachlor [2-chloro-N-(pyrazol-1-ylmethyl)acet-2′,6′-xylidide] in sand soil and loamy sand soil was studied in a soil column under laboratory conditions. Commercial metazachlor formulation (Metazachlor 500 suspension concentrate (SC)) and metazachlor immobilized in alginate matrix were used for leaching experiment. The initial concentration of metazachlor in soil for both formulations was 2.0 mg mL−1. After application of herbicide, the columns were irrigated with 100, 40, and 3.7 mm of water. After 1 h, when addition of water was completed, soils were sampled in 5-cm segments and were used for the analysis of residues. The use of alginate controlled release (CR) formulation reduced the vertical mobility of metazachlor into soil layer in comparison with the formulation SC.

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“…Pendimethalin has low mobility and will persist in soil because of its low leaching potential, attributed to its ability to strongly adsorb to soil colloids and organic matter. As a result, it typically remains in the top 10 cm of the soil profile following PRE application (Alister et al 2009;Chopra et al 2010;Lin et al 2007;Simmons and Derr 2007;Smith et al 1995). Furthermore, pendimethalin has low volatility (vapor pressure ¼ 1.25 3 10 À3 Pa), and thus is less prone to volatilization compared to other dinitroanilines (Parochetti and Dec 1978).…”

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confidence: 99%

Dissipation of Pendimethalin in Organic Soils in Florida

Odero

Shaner

2014

Weed technol.

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Understanding the persistence of PRE-applied pendimethalin is important in determining timing of subsequent weed management programs in sugarcane on organic soils in the Everglades Agricultural Area (EAA). Dissipation of oil- and water-based pendimethalin formulations applied PRE at 2, 4, and 8 kg ai ha−1were compared in 2011 and 2012 on organic soils in the EAA. The rate of dissipation of both formulations was very similar. Both formulations had an initial rapid rate of dissipation followed by a slower rate of dissipation. However, the initial amount of pendimethalin in the soil was higher with the water-based compared to the oil-based formulation, most likely because of the lower volatility of the water-based formulation. The half-lives (DT50s) of the oil-based formulation were 32, 18, and 10 d and 8, 8, and 12 d at 2, 4, and 8 kg ha−1, respectively, in 2011 and 2012, respectively. The DT50s of the water-based formulation were 20, 13, and 10 d and 12, 12, and 14 d at 2, 4, and 8 kg ha−1, respectively in 2011 and 2012, respectively. These DT50values were attributed to low soil water content as well as the absence of incorporation following application. Our results suggest that dissipation of pendimethalin is rapid on organic soils irrespective of the formulation when applied under dry soil conditions with no incorporation into the soil.

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Evaluation of leaching behavior of pendimethalin in sandy loam soil

Cited by 22 publications

References 13 publications

Field Dissipation of Sulfentrazone and Pendimethalin in Colorado

Field Dissipation of Sulfentrazone and Pendimethalin in Colorado

Influence of formulation on mobility of metazachlor in soil

Dissipation of Pendimethalin in Organic Soils in Florida

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