Dissipation and Residue of S-metolachlor in Maize and Soil

Cao, Pengying; Wang, Xiangyun; Liu, Fengmao; Zhao, Ercheng; Han, Lijun

doi:10.1007/s00128-008-9359-z

Cited by 26 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The DT 50 value for the dissipation of S-metolachlor in soil and maize for the first-order kinetics was within the same range as that reported by Caracciolo et al (2005). In our study, the following values were reported: 11.1–14.7 days (soil) and 9.6–13.9 days (maize), while S-metolachlor half-lives in maize in Changchun and Beijing lasted longer: 6.68 and 4.84 respectively (Cao et al 2008). …”

Section: Resultssupporting

confidence: 50%

See 1 more Smart Citation

Dissipation of S-metolachlor in plant and soil and effect on enzymatic activities

Wołejko

Kaczyński

Łozowicka

et al. 2017

Environ Monit Assess

View full text Add to dashboard Cite

The present study aimed at evaluating the dissipation of S-metolachlor (S-MET) at three doses in maize growing on diverse physico-chemical properties of soil. The effect of herbicide on dehydrogenase (DHA) and acid phosphatase (ACP) activity was estimated. A modified QuEChERS method using LC-MS/MS has been developed. The limit of quantification (0.001 mg kg−1) and detection (0.0005 mg kg−1) were very low for soil and maize samples. The mean recoveries and RSDs for the six spiked levels (0.001–0.5 mg kg−1) were 91.3 and 5.8%. The biggest differences in concentration of S-MET in maize were observed between the 28th and 63rd days. The dissipation of S-MET in the alkaline soil was the slowest between the 2nd and 7th days, and in the acidic soil between the 5th and 11th days. DT50 of S-MET calculated according to the first-order kinetics model was 11.1–14.7 days (soil) and 9.6–13.9 days (maize). The enzymatic activity of soil was higher in the acidic environment. One observed the significant positive correlation of ACP with pH of soil and contents of potassium and magnesium and negative with contents of phosphorus and organic carbon. The results indicated that at harvest time, the residues of S-MET in maize were well below the safety limit for maize. The findings of this study will foster the research on main parameters influencing the dissipation in maize ecosystems.

show abstract

Section: Resultssupporting

confidence: 50%

“…Due to its cultivation in monoculture, more and more frequently, it decreases its yields owing to weed infestation, which at the early stages of growth competes with maize for nutrients and water (Sun et al 2013; Cao et al 2008). To prevent it, one uses herbicides, which play a key role in the maize conservation programmes.…”

Section: Introductionmentioning

confidence: 99%

Dissipation of S-metolachlor in plant and soil and effect on enzymatic activities

Wołejko

Kaczyński

Łozowicka

et al. 2017

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Considering both soils together (Table ), the half‐life at 0 to 5 cm was 82 d, increasing to 103 d in the A 1 layer, 123 d in the B horizon, and 134 d in the C horizon (Figure ). Values obtained in the present study for the A horizon (A 0 + A 1 ) were substantially greater than half‐lives reported by others for S‐metolachlor in soils sampled from the surface 30 cm. However, other authors working with metolachlor obtained DT50 values similar to the results obtained in the present study.…”

Section: Resultscontrasting

confidence: 71%

Persistence of acetochlor, atrazine, and S-metolachlor in surface and subsurface horizons of 2 typic argiudolls under no-tillage

Bedmar

Giménez

Costa

et al. 2017

Environmental Toxicology and Chemistry

View full text Add to dashboard Cite

Variations in soil properties with depth strongly influence the degradation and persistence of herbicides, underlining the importance of studying these processes in soil horizons with distinctively different properties. The persistence of the herbicides acetochlor, atrazine, and S-metolachlor was measured in samples of the A, B, and C horizons of 2 Typic Argiudolls from Argentina under no-till management. The soils studied differed in soil organic carbon (OC) content, pH, particle size distribution, and structure. Quantification of herbicides in soil was done through high-performance liquid chromatography with diode array detector. There were interactions of herbicide × horizon (p < 0.01) that resulted in degradation rates (k) of all herbicides decreasing, and their corresponding dissipation half-life (DT50) values increasing, with soil depth. Herbicide persistence across all soils and horizons ranged from 15 to 73 d for acetochlor, 13 to 29 d for atrazine, and 82 to 141 d for S-metolachlor, which had significantly (p < 0.01) greater persistence than atrazine and acetochlor. The DT50 values of herbicides were negatively correlated with the contents of OC (correlation coefficients ranging from -0.496 to -0.773), phosphorus (-0.427 to -0.564), and nitrogen-nitrate (-0.507 to -0.662), and with microbial activity (-0.454 to -0.687) and the adsorption coefficient (-0.530 to -0.595); DT50s were positively correlated with pH (0.366 to 0.648). Adsorption was likely the most influential process in determining persistence of these herbicides in surface and subsurface horizons. The present study can potentially improve the prediction of the fate of acetochlor, atrazine, and S-metolachlor in soils because it includes much needed information on the degradation of the herbicides in subsurface horizons. Environ Toxicol Chem 2017;36:3065-3073. © 2017 SETAC.

show abstract

“…Additionally, the sorghum plants can degrade the herbicide via oxidation or the glutathione-S-transferase (GST) (SLABA et al, 2015), reducing the toxicity of these plants at 28 DAA. Corn plants that absorbed 0.025 mg kg-1 Smetolachlor were able to degrade 80% of this herbicide in 10 days (CAO et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Effects of weed management and plant arrangements on yield index of sweet sorghum

et al. 2019

View full text Add to dashboard Cite

Sweet sorghum is currently an important alternative for ethanol production in sugar cane off-season. In this study was to evaluate the effects of plant arrangements and the application of atrazine and Smetolachlor on growth and productivity of sweet sorghum. An experiment was conducted in randomized block design and, arranged in split plots with four repetitions. Plots consisted of spacing (0.25 m, 0.45 m 0.45-0.45-0.90 m) and sub-plots of weed control methods -atrazine (2000 g ha -1 ), atrazine + S-metolachlor (2000 + 720 g ha -1 ), atrazine + S-metolachlor (2000 + 960 g ha -1 ), atrazine + S-metolachlor (2000 + 1200 g ha -1 ), atrazine + Smetolachlor (2000 + 1440 g ha -1 ). Besides that, manual hoeing control was added. The intoxication of sorghum plants and weed control was evaluated at 7, 14 e 28 days after herbicides application (DAA). Plant height, stem diameter, total fresh matter, juice mass and total soluble solids (°Brix) were evaluated at 120 days after crop emergence (DAE). There was no interaction between the factors spacings and control method for variables total matter fresh (TMF), height (H), stem diameter (D), juice mass (JM), and Brix. Application of the mixture (atrazine + S-metolachlor) in the highest doses reduced total fresh matter and °Brix. The spacing of 0.25 m provided the highest productivity of fresh matter, juice mass and increased the °Brix. The application of mixture (atrazine + S-metolachlor) controlled 90% of the weeds at 28 days after application. The increasing in doses of S-metolachlor elevates the intoxication in sorghum plants. The mixture (atrazine + S-metolachlor) has a potential for use in weed control in sweet sorghum, but at doses below 960 g ha -1 of S-metolachlor.

show abstract

Dissipation and Residue of S-metolachlor in Maize and Soil

Cited by 26 publications

References 11 publications

Dissipation of S-metolachlor in plant and soil and effect on enzymatic activities

Dissipation of S-metolachlor in plant and soil and effect on enzymatic activities

Persistence of acetochlor, atrazine, and S-metolachlor in surface and subsurface horizons of 2 typic argiudolls under no-tillage

Effects of weed management and plant arrangements on yield index of sweet sorghum

Contact Info

Product

Resources

About