Adsorption and leaching of novel fungicide pyraoxystrobin on soils by 14C tracing method

Liu, Xunyue; Wu, Huiming; Hu, Tingting; Chen, Xia; Ding, Xingcheng

doi:10.1007/s10661-017-6458-5

Cited by 24 publications

(15 citation statements)

References 25 publications

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“…To explain the difference in behaviour evaluated through environmental availability (DMX less available than EPX) and adsorption studies (DMX more available than EPX), two reasons can be hypothesized. First, a hysteresis phenomenon could occur, decreasing DMX desorption as previously observed for some other strobilurin fungicides (Reddy et al 2013, Wu et al 2016Liu et al 2018). The second hypothesis is based on potential interactions driving pesticides remobilisation from soil, independantly of their solubilisation.…”

Section: Evaluation Of Environmental Availabilitymentioning

confidence: 82%

Soil dissipation and bioavailability to earthworms of two fungicides under laboratory and field conditions

Nélieu

Delarue

Amossé

et al. 2020

Environ Sci Pollut Res

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The representativeness of laboratory studies of the fate of pesticides in soil in field conditions is questionable. This study aimed at comparing the dissipation and bioavailability to earthworms of two fungicides, dimoxystrobin (DMX) and epoxiconazole (EPX), over 12 months under laboratory and field conditions. In both approaches, the fungicides were applied to the same loamy soil as a formulated mixture at several concentrations. We determined total DMX and EPX concentrations in the soil using exhaustive extraction, their environmental availability using mild extraction, and their bioavailability through internal concentrations in exposed earthworms. The initial fungicide application appeared as much better controlled in terms of dose and homogeneity in the laboratory than in the field. One year after application, a similar dissipation rate was observed between the laboratory and field experiments (ca 80% and 60% for DMX and EPX, respectively). Similarly, the ratio of available/total concentrations in soil displayed the same trend whatever the duration and the conditions (field or lab), EPX being more available than DMX. Finally, the environmental bioavailability of the two fungicides to earthworms was heterogeneous in the field, but, in the laboratory, the bioaccumulation was evidenced to be dose-dependent only for DMX. Our findings suggest that the actual fate of the two considered fungicides in the environment is consistent with the one determined in the laboratory, although the conditions differed (e.g., presence of vegetation, endogeic earthworm species). This study allowed better understanding of the fate of the two considered active substances in the soil and underlined the need for more research dedicated to the link between environmental and toxicological bioavailability.

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Section: Evaluation Of Environmental Availabilitymentioning

confidence: 82%

Soil dissipation and bioavailability to earthworms of two fungicides under laboratory and field conditions

Nélieu

Delarue

Amossé

et al. 2020

Environ Sci Pollut Res

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“…Variety of researches have been done on the adsorption of different pesticides in soils. [14][15][16][17][18] Despite such studies, reports regarding Rimsulfuron in Pakistani soils selected for current research are nonexistent. Current research has tackled the adsorption of Rimsulfuron with selected soils as physical adsorbents in addition to the environmental detoxification of those soils by means of biosorbent prepared in a cost effective and environmental friendly assay.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Rimsulfuron in selected soils and its removal via activated carbon

Ahmad¹

2019

Rev.Roum.Chim.

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In present investigation, Rimsulfuron has been adsorbed onto the selected soils possessing agricultural significance via batch equilibration experiments. Such an approach was adopted for comprehension of the adsorptive interactions between Rimsulfuron and soils as a function of selected soils'physicochemical parameters. Linear adsorption coefficient K d values varied from 3.07 to 20.5 µg mL-1. Due to distinct physicochemical properties favoring the adsorption of Rimsulfuron, highest K d value was shown by soil sample three with highest organic matter of 1.4% and lowest pH of 7.05. The Gibbs free energy values were found negative ranging from-6.7 to-19 kJ mol-1 proposing physio-sorption and exothermic interaction with selected soils. Results have been statistically analyzed by one way analysis of variance (ANOVA) and the accuracy of fit has been calculated by plotting residual graphs in Minitab. Activated carbon has been utilized for environmental remediation of Rimsulfuron adsorbed soils in simulated conditions. The effect of contact time on the removal efficiency was investigated. Soil sample 2 expressed the highest removal percentages by activated carbon at both concentrations of 5 ppm (81%) and 7.5 ppm (69%).

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“…Actually, over a dozen agrochemicals containing pyrazoles have been successfully developed for plant pathogen management (Figure ). − …”

Section: Introductionmentioning

confidence: 99%

Design, Synthesis, and Evaluation of Novel 4-Chloropyrazole-Based Pyridines as Potent Fungicide Candidates

Wang

Kou

Huo

et al. 2022

J. Agric. Food Chem.

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A rational molecular design approach was developed in our laboratory to guide the discovery of novel sterol biosynthesis inhibitors. Based on the application of bioactivities of heterocyclic rings and molecular docking targeting the sterol biosynthesis 14α-demethylase, a series of 4-chloropyrazole-based pyridine derivatives were rationally designed, synthesized, and characterized and their fungicidal activities were also evaluated. Bioassay results showed that 7e, 7f, and 7m exhibited commendable, diverse antifungal actions that are comparable to those of the positive controls imazalil and triadimefon. The active compounds’ mode of action was further studied by microscopy observations, Q-PCR, and enzyme inhibition assay and discovered that target compounds affect fungal sterol biosynthesis via disturbing RcCYP51 enzyme system. These findings support that their fungicidal mode of action still targets the cytochrome P450-dependent 14α-demethylase as the molecular design did at first. The above results strongly suggest that our rational molecular design protocol is not only practical but also efficient.

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Adsorption and leaching of novel fungicide pyraoxystrobin on soils by 14C tracing method

Cited by 24 publications

References 25 publications

Soil dissipation and bioavailability to earthworms of two fungicides under laboratory and field conditions

Soil dissipation and bioavailability to earthworms of two fungicides under laboratory and field conditions

Adsorption of Rimsulfuron in selected soils and its removal via activated carbon

Design, Synthesis, and Evaluation of Novel 4-Chloropyrazole-Based Pyridines as Potent Fungicide Candidates

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