Movement of water, bromide and the pesticides ethoprophos and bentazone in a sandy soil: the Vredepeel data set

Boesten, J.J.T.I.; Pas, L.J.T. van der

doi:10.1016/s0378-3774(99)00082-7

Cited by 55 publications

(37 citation statements)

References 9 publications

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“…The values of E a calculated from the Arrhenius equation based on the results of degradation experiments carried out in the Ap horizon at 5 and 25°C are presented in Table 2 Scorza et al (2004), which is close to our results (52.5-88.5 kJ mol -1 , average of 74.0 kJ mol -1 ), and the extremely high value of 113.3 kJ mol -1 obtained by Boesten and van der Pas (2000). Given the variability of the above results (see also the E a values for MCPA in Paszko (2009) and for carbendazim in Paszko and Skrzypek (2010)), a default value of 68.9 kJ mol -1 , which is recommended for pesticides by EFSA (2008), should give correct results for the relationship between temperature and pesticide degradation rates in Polish soils.…”

Section: Resultssupporting

confidence: 88%

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Paszko¹,

Muszyński²

2017

International Agrophysics

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A b s t r a c t. The degradation rates of three herbicides (alachlor, atrazine, and bentazone) were examined according to OECD Guideline 307 in three profiles of grey-brown podzolic soil (Luvisol) in a laboratory experiment. The aim of the experiment was to determine herbicide degradation parameters and their relationships with soil properties. Degradation processes were effectively described by a first-order model. However, in some cases, the best results were produced by bi-phasic kinetics (hockey-stick and bi-exponential model). The degradation rates of the tested herbicides at 25°C and 40% maximum water holding capacity, established based on half-life values in the Ap horizon, increased in the following order: atrazine (32.6-42.8 days)

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Section: Resultssupporting

confidence: 88%

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Paszko¹,

Muszyński²

2017

International Agrophysics

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“…An earlier study at the Vredepeel field2, 13 found that the rate of transformation of bentazone in subsoil material from a depth of about 1 m (at 10 °C) was too low to be measured. One of the possible explanations is that the transformation potential was comparatively low at the time of the earlier subsoil collection.…”

Section: General Discussion and Conclusionmentioning

confidence: 96%

Rate of bentazone transformation in four layers of a humic sandy soil profile with fluctuating water table

Leistra¹,

Smelt²,

Matser³

et al. 2001

Pest Management Science

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The rate of transformation of a pesticide as a function of the depth in the soil is needed as an input into computations on the risk of residues leaching to groundwater. The herbicide bentazone was incubated at 15 degrees C in soil materials derived from four layers at depths of up to 2.5 m in a humic sandy soil profile with a fluctuating water table (0.8 to 1.4 m), while simulating the redox conditions existing in the field. Gamma-irradiation experiments indicated that bentazone is mainly transformed by microbial activity in the soil. The rate constant for transformation was highest in the humic sandy top layer; it decreased with depth in the sandy vadose subsoil. However, material from the top of the phreatic aquifer had a higher rate constant than that from the layers just above. The presence of fossil organic material in the fluviatile water-saturated sediment probably stimulated microbial activity and bentazone transformation. The changes in the transformation rate constant with depth showed the same trend as those in some soil factors, viz organic carbon content, water-extractable phosphorus and microbial density as measured by fluorescence counts. However, the (low) concentration of dissolved organic carbon (DOC) in the top of the aquifer did not fit the trend. The rate constant for bentazone transformation in the layers was higher at lower initial contents of the herbicide.

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“…Bentazone is a commonly used herbicide which poses environmental concerns because of its high mobility, persistence and susceptibility to leaching from soil to groundwater Boesten and Van der Pas, 2000;Li et al, 2003). It is applied at a high rate in agriculture and frequently occurs as contaminant of groundwater and surface water (Helweg et al, 2002;Lagana et al, 2002Dousset et al, 2004.…”

Section: Introductionmentioning

confidence: 99%

Study of the spatial variation of the biodegradation rate of the herbicide bentazone with soil depth using contrasting incubation methods

2008

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Movement of water, bromide and the pesticides ethoprophos and bentazone in a sandy soil: the Vredepeel data set

Cited by 55 publications

References 9 publications

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Rate of bentazone transformation in four layers of a humic sandy soil profile with fluctuating water table

Study of the spatial variation of the biodegradation rate of the herbicide bentazone with soil depth using contrasting incubation methods

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