Bioavailability and toxicity of imazethapyr in maize plant estimated by four chemical extraction techniques in different soils

Chang, Qing; Ji, Weiping; Lu, Qingxiang; Xue, Jiaying; Hua, Rimao; Wu, Xiangwei

doi:10.1016/j.scitotenv.2021.149594

Cited by 15 publications

(7 citation statements)

References 28 publications

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“…The results indicated that C IPW could better evaluate the bioavailability of atrazine to barnyard grass in different soils than C soil , C EPW , and C CaCl2 . Similarly, several studies have reported that the organic compound present in in situ pore water was the major bioavailable fraction for plant uptake, 12, 14, 15 and that pesticide concentration in plants was closely associated with C IPW 19 . C IPW has been considered as an effective method for evaluating the bioavailability of organic compounds, 14, 15, 19, 28 which was consistent with the results in this study.…”

Section: Resultssupporting

confidence: 90%

“…Therefore, atrazine in bulk soil and soil water was extracted by four different methods (C soil , C CaCl2 , C EPW , and C IPW ) and analyzed for further evaluation of bioavailability. In all the tested soils, C soil of atrazine was slightly lower than the amended concentration probably due to the fact that a small portion of atrazine could not be extracted as a result of strong sorption to soil 15 . In the cases of 1 mg kg −1 , C CaCl2 , C EPW and C IPW in JL soil were the lowest but those in SN soil were the highest.…”

Section: Resultsmentioning

confidence: 83%

“…In all the tested soils, C soil of atrazine was slightly lower than the amended concentration probably due to the fact that a small portion of atrazine could not be extracted as a result of strong sorption to soil. 15 In the cases of 1 mg kg −1 , C CaCl2 , C EPW and C IPW in JL soil were the lowest but those in SN soil were the highest. This difference was mainly governed by atrazine sorption to soil.…”

Section: Uptake Of Atrazine By Barnyard Grassmentioning

confidence: 91%

“…14 Chang et al suggested that in situ pore water and passive sampling concentrations of imazethapyr were effective to predict its bioavailability and toxicity to maize (Zea mays L.). 15 Given the possibility that weed control efficacy of atrazine varies with soil properties, it is necessary to find methods for accurate estimation of atrazine herbicidal activity to weeds.…”

Section: Introductionmentioning

confidence: 99%

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Herbicidal activity of atrazine to barnyard grass depends upon soil characteristics

Lang

Shen

et al. 2022

Pest Management Science

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BACKGROUND:The efficacy of a herbicide as soil treatment agent may be largely affected by soil characteristics. Understanding the relationship between herbicide efficacy and soil characteristics can provide decision basis for herbicide application according to local conditions. This study was aimed towards exploring the effect of soil characteristics on herbicidal activity of atrazine as a model herbicide to barnyard grass and thus to find an indicator for the herbicidal activity assessment of a herbicide against weeds.RESULTS: The herbicidal activity of atrazine to barnyard grass varied greatly among the tested soils with the medium inhibition concentration (IC 50 ), based on the amended concentration, ranging from 1.07 to 10.91 mg kg −1 . Uptake of atrazine by barnyard grass was negatively correlated with its adsorption onto soils, whereas it was positively related to the concentration of the herbicide in in situ pore water (C IPW ). Comparable IC 50 values ranging from 1.14 to 1.38 were obtained from C IPW in the tested soils with much smaller variation coefficient compared to those based on the traditional concentration (C soil ) of this herbicide in soils determined by extraction with organic solvents.CONCLUSION: The concentration of atrazine in in situ pore water could be reliable to evaluate its bioavailability and herbicidal activity to barnyard grass. C IPW of a herbicide in soil could be an indicator for guiding the practical application rate.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 83%

Section: Uptake Of Atrazine By Barnyard Grassmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Herbicidal activity of atrazine to barnyard grass depends upon soil characteristics

Lang

Shen

et al. 2022

Pest Management Science

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“…In agreement with the previous study, C IPW could be an effective candidate to estimate the uptake and accumulation of chemicals in soilplant systems. 29,41 Partition-Limited Model. The partition-limited model was used to predict the uptake and distribution of cyantraniliprole in wheat.…”

mentioning

confidence: 99%

Uptake, Translocation, and Distribution of Cyantraniliprole in a Wheat Planting System

Cao

Zhang

et al. 2023

J. Agric. Food Chem.

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Cyantraniliprole uptake, translocation, and distribution in wheat plants grown in hydroponics and soil conditions were investigated. The hydroponics experiment indicated that cyantraniliprole was prone to be absorbed by wheat roots mainly through the apoplastic pathway and predominately distributed in the cell-soluble fraction (81.4–83.6%) and ultimately transferred upward to leaves (TFleave/stem = 4.84 > TFstem/root = 0.67). In wheat-soil systems, the uptake of cyantraniliprole was similar to that in hydroponics. The accumulation of cyantraniliprole in wheat tissues was mainly affected by the content of soil organic matter and clay, resulting in the increased adsorption of cyantraniliprole onto soils (R 2 > 0.991, P < 0.01), and was positively related to the concentration of cyantraniliprole in soil pore water (R 2 > 0.991, P < 0.001). Besides, the absorption of cyantraniliprole by wheat was predicted well by the partition-limited model. These results increased our understanding of the absorption and accumulation of cyantraniliprole in wheat and were also helpful for guiding the practical application and risk evaluation of cyantraniliprole.

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Bioavailability and phytotoxicity of clomazone to corn depend on soil characteristics and can be estimated by in situ pore water

Cao,

Peng,

et al. 2024

Pest Management Science

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BACKGROUNDThe injury caused by residual herbicides in soils to subsequent crops has been frequently reported and is largely related to soil physicochemical properties. Elucidating the interactions between herbicide toxicity and soil properties could help assess its phytotoxicity based on local soil characteristics. Here, the influence of soil properties on the accumulation and toxicity of clomazone as a model compound to corn was explored to obtain a universal indicator for estimating the toxicity of herbicides against crops.RESULTSThe phytotoxicity of clomazone to corn differed in the five tested soils with the median inhibitory concentration (IC50) values, according to the added concentration, fluctuating between 2.80 and 26.97 mg/kg. The uptake of clomazone by corn was primarily affected by its sorption onto soils and showed a positive correlation with the concentration of clomazone in in situ pore water (CIPW) (R2 ≥ 0.775, P < 0.001). In contrast to results derived from traditional soil clomazone concentrations (Csoil) determined through organic solvent extraction, consistent IC50 values (1.344–1.626 mg/L) were obtained based on CIPW in all five soils with a much lower coefficient of variation.CONCLUSIONSThese findings indicate that measuring the concentration of clomazone in in situ pore water provides a reliable and comparable method for evaluating its bioavailability and phytotoxicity on corn. Using CIPW rather than Csoil as a herbicide indicator is more accurate for assessing its actual phytotoxicity. These results are important for the scientific application of clomazone and the safe production of corn. © 2024 Society of Chemical Industry.

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Bioavailability and toxicity of imazethapyr in maize plant estimated by four chemical extraction techniques in different soils

Cited by 15 publications

References 28 publications

Herbicidal activity of atrazine to barnyard grass depends upon soil characteristics

Herbicidal activity of atrazine to barnyard grass depends upon soil characteristics

Uptake, Translocation, and Distribution of Cyantraniliprole in a Wheat Planting System

Bioavailability and phytotoxicity of clomazone to corn depend on soil characteristics and can be estimated by in situ pore water

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