Environmental Fate and Toxicology of Clomazone

Scoy, April R. Van; Tjeerdema, Ronald S.

doi:10.1007/978-3-319-03777-6_3

Cited by 21 publications

(17 citation statements)

References 53 publications

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“…In particular, DA T values were much higher in the amended than in unamended soils in aerobic (up to 3.7 times higher) and anaerobic (up to 4.2 times higher) conditions, indicating that clomazone was degraded preferably by biotic processes. This is in concordance with Tomco and Tjeerdema and Van Scoy and Tjeerdema who also described biological processes as constituting the major pathway of clomazone degradation in soils.…”

Section: Resultssupporting

confidence: 93%

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How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

Fernández

Gómez

Albarrán

et al. 2019

Pest Management Science

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BACKGROUND Irrigation and tillage systems alone or in combination with organic amendments can strongly influence soil properties, which in turn may also modify the environmental fate of any pesticides applied. This study was aimed at determining how amendment with composted olive‐mill waste (W) influenced leaching, sorption, and persistence of the herbicide clomazone in rice field soils under different tillage and irrigation management practices. The field trial conducted covered 3 years in succession, with six treatments: irrigation by sprinkler and conventional tillage without (ST) or with W application (80 Mg ha−1) (STW), irrigation by sprinkler but no tillage (SNT), irrigation by sprinkler but no tillage with W application (SNTW), and continuous flooding irrigation and tillage without (FT) and with W application (FTW). RESULTS Application of W significantly increased the adsorption of clomazone to soil in the first and third years. In the first year, the persistence of clomazone under aerobic (t1/2 = 33.1–36.3 days) and anaerobic incubation conditions (t1/2 = 3.43–10.8 days) decreased after W application to t1/2 values in the ranges 18.1–29.7 and 3.06–5.44 days, respectively. However, in the third year, although clomazone persistence increased significantly in SNT and ST when W was applied under both incubation conditions, it decreased significantly in FT management under anaerobic incubation conditions. The addition of W led to less leaching of clomazone, particularly for the FT case where the herbicide leaching losses were 2.8 and 2.6 times lower in the first and third years after W addition, respectively. CONCLUSIONS Using W as an organic amendment could be regarded as an invaluable strategy to reduce water contamination by clomazone in rice production, especially under traditional tillage and flooding management. © 2019 Society of Chemical Industry

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Section: Resultssupporting

confidence: 93%

“…This is consistent with previous studies reporting a faster dissipation of this herbicide in flooded than in non‐flooded soil conditions (e.g. Van Scoy and Tjeerdema). Similarly, Tomco et al .…”

Section: Resultsmentioning

confidence: 79%

How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

Fernández

Gómez

Albarrán

et al. 2019

Pest Management Science

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“…According to other authors, microbial metabolisms of clomazone and metazachlor form a major degradation pathway 49,50 . The rate of clomazone degradation is affected by soil moisture, temperature, microorganisms, pH, and is accelerated under anaerobic conditions 51 .…”

Section: Discussionmentioning

confidence: 97%

The difference in dissipation of clomazone and metazachlor in soil under field and laboratory conditions and their uptake by plants

Szpyrka

Słowik‐Borowiec

Książek

et al. 2020

Sci Rep

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The study concerned dissipation of metazachlor and clomazone, herbicides widely used in rapeseed (Brassica napus L. subsp. napus) protection, applied to the clay soil under field and laboratory conditions. Furthermore, the uptake of these pesticide from soil by rapeseed plants was investigated under field conditions. An additional aim of this work was to modify the QuEChERS method for the determination of metazachlor and clomazone in the plant material. Analytical procedures for metazachlor and clomazone qualification and quantification in rapeseed plants and soil were developed, using gas chromatography with an micro electron capture detector (GC-μECD) and a mass detector (GC-MS/MS QqQ) as confirmation. Dissipation kinetics of herbicide residues in soil were described as first-order equations. The analytical performance was very satisfactory and confirmed that the methods meet the requirements of the European Commission. In the conducted field experiments it was found that dissipation of clomazone and metazachlor in clay soil follows first-order kinetics (R 2 between 0.964 and 0.978), and half-lives were 9.5 days and 10.2 days for clomazone and metazachlor, respectively. Under laboratory conditions, dissipation of clomazone and metazachlor in soil also follows first-order kinetics (R 2 between 0.937 and 0.938), and half-lives were 8.8 days and 5.7 days for clomazone and metazachlor, respectively. Residues of both herbicides in rape plants 22 days after application of herbicides were below the maximum residue levels for Brassica plants. Metazachlor and clomazone dissipate very fast in clay soil and their uptake by rape plants is very low.

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“…Organophosphate pesticides are generally regarded as safe for use on crops and animals due to their relatively fast biodegradation, but depend on microbial composition, pH, temperature, and sunlight. This compound can be degraded rapidly by hydrolysis in the presence of sunlight and air [28]. Physical, chemical, and biological methods have been used to minimize the toxic effect generated by this pollutant in water.…”

Section: Methyl Parathionmentioning

confidence: 99%

Photocatalytic Treatment of Pesticides Using TiO₂ Doped with Rare Earth

Pérez¹,

Torres²,

Romero³

et al. 2019

Water and Wastewater Treatment

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Rare earth doping ions can improve the spectral response of this semiconductor to the visible region. This work evaluated the dopant effect of rare earth ions such as La, Ce, Nd, Pr, Sm, Eu, and Gd in titania for the solar photodegradation of Diuron and methyl parathion. The increase in the content up to 0.5% of dopants decreases photoactivity due to the formation of photo-generated electron-hole pair recombination centers. The catalysts calcined at 500°C presented only the anatase crystalline phase and the samples doped with La and Ce at 0.1 and 0.3% were the most active in diuron solar degradation; however, when the temperature of the thermal treatment increased to 800°C, mixtures of crystalline phases were presented. The catalyst with the highest anatase content showed the best performance. The materials calcined at 500°C with better performance in diuron solar degradation were selected to to treat methyl parathion using solar light. Finally, under these conditions, an affinity was found for the dopant ions in titania and in the functional groups of the contaminating molecules (phenylurea and thiophosphate). Solar photodegradation of diuron was more effective with La and Ce, while for methyl parathion, it was Eu at 0.3%.

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Environmental Fate and Toxicology of Clomazone

Cited by 21 publications

References 53 publications

How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

The difference in dissipation of clomazone and metazachlor in soil under field and laboratory conditions and their uptake by plants

Photocatalytic Treatment of Pesticides Using TiO₂ Doped with Rare Earth

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Environmental Fate and Toxicology of Clomazone

Cited by 21 publications

References 53 publications

How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

How the environmental fate of clomazone in rice fields is influenced by amendment with olive‐mill waste under different regimes of irrigation and tillage

The difference in dissipation of clomazone and metazachlor in soil under field and laboratory conditions and their uptake by plants

Photocatalytic Treatment of Pesticides Using TiO2 Doped with Rare Earth

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Photocatalytic Treatment of Pesticides Using TiO₂ Doped with Rare Earth