Pendimethalin degradation in soil and its interaction with soil microorganisms

Kočárek, Martin; Artikov, H.; Voříšek, K.; Borůvka, Luboš

doi:10.17221/226/2015-swr

Cited by 27 publications

(21 citation statements)

References 19 publications

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“…Strange-Hansen et al (2004) stated that glyphosate degradation in the soil environment is a cometabolic process and the rate of decomposition would depend on the general activity of microbial populations, the type of soil and environmental conditions. Kočárek et al (2016) in a study on pendimethalin degradation in a haplastic chernosol, under controlled conditions, did not observe any effect of pendimethalin on the quantity or activity of soil microorganisms. But it was observed that the fungi Aspergillus fumigatus and Penicillium citrinum used this herbicide as a carbon source in the present research.…”

Section: Resultsmentioning

confidence: 86%

Biodegradation of atrazine, glyphosate and pendimetaline employing fungal consortia

Bravim

Alves

Orlanda

2020

RSD

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The objective of the present study was to evaluate the bioremediation of soils artificially contaminated with atrazine, glyphosate and pendimethalin by fungal consortia in biodegradation processes in microcosms. Biodegradation was evaluated from microbial respiration over a period of 15 days and genotoxicity analysis in Allium cepa roots exposed to elutriate samples at zero and 50 μg mL-1 concentrations of the herbicides after the biodegradation process. The results were submitted to analysis of variance, the Tukey test and the Fischer test (p<0.05%) for comparison of means. The Aspergillus fumigatus - Penicillium citrinum consortium had a larger capacity to degrade atrazine but metabolism was inhibited in the presence of glyphosate and pendimethalin. There was a delay in the mitotic index in the meristematic cells of the Allium cepa roots exposed to the elutriates in the 50 μg mL-1 atrazine and pendimethalin concentration. There was a cellular alteration in the metaphase phase of the cells exposed to the elutriates at the 50 μg mL-1 concentration of the three herbicides. The changes occurred were low, indicating that there was degradation of part of the herbicides.

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Section: Resultsmentioning

confidence: 86%

Biodegradation of atrazine, glyphosate and pendimetaline employing fungal consortia

Bravim

Alves

Orlanda

2020

RSD

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“…On the contrary, an insignificant effect of doubled application rate on herbicides dissipation was documented by Tsiropoulos and Miliadis (1998), Kewat et al (2001) and Jursík et al (2016). Finally, Kočárek et al (2016) observed a shorter half-life for pendimethalin when the pendimethalin application rate was doubled. Vertical soil transport of herbicides.…”

Section: Sunflower Injurymentioning

confidence: 95%

Effect of different soil and weather conditions on efficacy, selectivity and dissipation of herbicides in sunflower

Jursík¹,

Kočárek²,

Kolářová³

et al. 2020

Plant Soil Environ.

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Six sunflower herbicides were tested at two application rates (1N and 2N) on three locations (with different soil types) within three years (2015–2017). Efficacy of the tested herbicides on Chenopodium album increased with an increasing cation exchange capacity (CEC) of the soil. Efficacy of pendimethalin was 95%, flurochloridone and aclonifen 94%, dimethenamid-P 72%, pethoxamid 49% and S-metolachlor 47%. All tested herbicides injured sunflower on sandy soil (Regosol) which had the lowest CEC, especially in wet conditions (phytotoxicity 27% after 1N application rate). The highest phytotoxicity was recorded after the application of dimethenamid-P (19% at 1N and 45% at 2N application rate). Main symptoms of phytotoxicity were leaf deformations and necroses and the damage of growing tips, which led to destruction of some plants. Aclonifen, pethoxamid and S-metolachlor at 1N did not injure sunflower on the soil with the highest CEC (Chernozem) in any of the experimental years. Persistence of tested herbicides was significantly longer in Fluvisol (medium CEC) compared to Regosol and Chernozem. Dimethenamid-P showed the shortest persistence in Regosol and Chernozem. The majority of herbicides was detected in the soil layer 0–5 cm in all tested soils. Vertical transport of herbicides in soil was affected by the herbicide used, soil type and weather conditions. The highest vertical transport was recorded for dimethenamid-P and pethoxamid (4, resp. 6% of applied rate) in Regosol in the growing season with high precipitation.

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“…The modi ed method by Kočárek et al (2016) was used to determine the residual concentration of herbicides in soil solution (µg cm − 3 ) using the HPLC (Dionex; USA) technique. The rate of degradation and half-life (DT 50 ) of herbicides were calculated using the following equation:…”

Section: Degradation Experimentsmentioning

confidence: 99%

Adsorption and Degradation Behavior of Six Herbicides in Different Agricultural Soils.

Sharipov

Kočárek

Jursík

et al. 2021

Preprint

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This study focuses on the assessment of herbicide adsorption and degradation in three soils (Haplic Chernozem, Haplic Fluvisol, and Arenic Regozem) from different agricultural regions of the Czech Republic where sunflower is cultivated. Soil samples were used in laboratory batch sorption and degradation experiments for six herbicides commonly used on sunflower crops. The findings are used to examine the effect of soil and herbicide properties on adsorption and degradation, as well as to determine the possible relation between the two processes. The (Kf) sorption coefficient ranged from 1.07 to 135.37 cm3/n μg1-1/n g-1, and sorption increased in order: dimethenamid-p < pethoxamid < s-metolachlor < flurochloridone < aclonifen < pendimethalin. Sorption of all six herbicides was positively correlated with organic matter content (p < 0. 001), and cation exchange capacity (p < 0.001). pH was negatively correlated with the sorption of all six compounds (p < 0.001). Degradation rates of herbicides ranged from 0. 012 to 0. 048 day-1, which corresponding to (DT50) half-lives between 14 - 57 days respectively. The longer half-lives were always found in Haplic Fluvisol with higher organic matter content. Results showed that both adsorption and degradation of herbicides is mainly controlled by soil organic matter. A negative relationship was found between the sorption coefficient and the rate of degradation. It can be concluded that the Freundlich sorption coefficient (Kf) can be a good predictor for soil degradation of the studied herbicides.

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Pendimethalin degradation in soil and its interaction with soil microorganisms

Cited by 27 publications

References 19 publications

Biodegradation of atrazine, glyphosate and pendimetaline employing fungal consortia

Biodegradation of atrazine, glyphosate and pendimetaline employing fungal consortia

Effect of different soil and weather conditions on efficacy, selectivity and dissipation of herbicides in sunflower

Adsorption and Degradation Behavior of Six Herbicides in Different Agricultural Soils.

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