The dissipation of fipronil, chlorpyrifos, fosthiazate and ethoprophos in soils from potato monoculture areas: first evidence for the enhanced biodegradation of fosthiazate

Papadopoulou, Evangelia S.; Lagos, Stathis; Spentza, Flora; Vidiadakis, Evangelos; Karas, Panagiotis A.; Klitsinaris, Tassos; Karpouzas, Dimitrios G.

doi:10.1002/ps.4092

Cited by 22 publications

(10 citation statements)

References 33 publications

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“…CHL showed a moderate persistence with DT 50s within the range reported in the literature: 10 to 120 days in laboratory studies (Racke, 1993;Papadopoulou et al, 2016) and 0.6 to 121 days in field studies (Jin and Webster, 1997;Laabs et al, 2002). In the laboratory study, the persistence of CHL decreased with increasing dose rates (DT 50s 28.6 to 52.6 days in the ×10 and ×1 dose rate, respectively) which is not in accordance with the general trend for increasing CHL persistence at increasing application rates (John and Shaike, 2015) and to the opposite trend observed in the field experiment (DT 50s 6.7 to 119.6 days in the × 1 and ×5 dose rate, respectively).…”

Section: Dissipation and Transformation Of Chlorpyrifossupporting

confidence: 65%

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Papadopoulou

Karas

Nikolaki

et al. 2016

Science of The Total Environment

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Assessment of dissipation constitutes an integral part of pesticides risk assessment since it provides an estimate of the level and the duration of exposure of the terrestrial ecosystem to pesticides. Within the frame of an overall assessment of the soil microbial toxicity of pesticides, we investigated the dissipation of a range of dose rates of three model pesticides, isoproturon (IPU), tebuconazole (TCZ), and chlorpyrifos (CHL), and the formation and dissipation of their main transformation products following a tiered lab-to-field approach. The adsorption of pesticides and their transformation products was also determined. IPU was the least persistent pesticide showing a dose-dependent increase in its persistence in both laboratory and field studies. CHL dissipation showed a dose-dependent increase under laboratory conditions and an exact opposite trend in the field. TCZ was the most persistent pesticide under lab conditions showing a dose-dependent decrease in its dissipation, whereas in the field TCZ exhibited a biphasic dissipation pattern with extrapolated DT90s ranging from 198 to 603.4days in the ×1 and ×2 dose rates, respectively. IPU was demethylated to mono- (MD-IPU) and di-desmethyl-isoproturon (DD-IPU) which dissipated following a similar pattern with the parent compound. CHL was hydrolyzed to 3,5,6-trichloro-2-pyridinol (TCP) which dissipated showing a reverse dose-dependent pattern compared to CHL. Pesticides adsorption affinity increased in the order IPU

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Section: Dissipation and Transformation Of Chlorpyrifossupporting

confidence: 65%

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Papadopoulou

Karas

Nikolaki

et al. 2016

Science of The Total Environment

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“…Enrichment cultures in MSM and MSMN amended with fosthiazate were employed to isolate fosthiazate-degrading bacteria. A soil from a potato monoculture area in Neurokopi-Drama, Northern Greece, which has shown enhanced biodegradation of fosthiazate (Papadopoulou et al 2016) was used as source for the isolation of fosthiazate-degrading bacteria. Prior to the commencement of the enrichment cultures, the soil was repeatedly treated with fosthiazate (10 mg kg À1 ), three times on 10-day intervals, to stimulate the fraction of the microbial community able to degrade fosthiazate.…”

Section: Enrichment Cultures and Isolation Of Fosthiazatedegrading Bamentioning

confidence: 99%

“…Fosthiazate was extracted from liquid media by mixing 0Á5 ml of liquid culture with 1 ml of methanol. The mixture was vortexed for 30 s, centrifuged for 3 min at maximum speed and the supernatant was directly analysed in a Marathon III HPLC-UV system equipped with a CNW Athena RP C18 150 mm 9 4Á6 mm column (CNW Technologies, Duesseldorf, Germany) as described by Papadopoulou et al (2016). Fortification tests at three concentration levels (0Á2, 2 and 20 mg l À1 ) showed recoveries of >85%.…”

Section: Fosthiazate Residue Analysismentioning

confidence: 99%

“…The repeated use of the same synthetic nematicide on the same field for several years often results in reduced nematicidal efficacy. This has been attributed to the phenomenon of enhanced microbial degradation with most of the currently available nematicides including fenamiphos (Davis et al 1993), ethoprophos (Karpouzas et al 1999), oxamyl (Smelt et al 1987;Rousidou et al 2017) and recently fosthiazate (Papadopoulou et al 2016) showing high vulnerability to this phenomenon.…”

Section: Introductionmentioning

confidence: 99%

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Isolation and characterization of soil bacteria able to rapidly degrade the organophosphorus nematicide fosthiazate

Lagos

Perruchon

Katsoula

et al. 2019

Lett Appl Microbiol

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Foshtiazate is an organophosphorus nematicide commonly used in protected crops and potato plantations. It is toxic to mammals, birds and honeybees, it is persistent in certain soils and can be transported to water resources. Recent studies by our group demonstrated, for the first time, the development of enhanced biodegradation of fosthiazate in agricultural soils. However, the micro‐organisms driving this process are still unknown. We aimed to isolate soil bacteria responsible for the enhanced biodegradation of fosthiazate and assess their degradation potential against high concentrations of the nematicide. Enrichment cultures led to the isolation of two bacterial cultures actively degrading fosthiazate. Denaturating Gradient Gel Electrophoresis analysis revealed that they were composed of a single phylotype, identified via 16S rRNA cloning and phylogenetic analysis as Variovorax boronicumulans. This strain showed high degradation potential against fosthiazate. It degraded up to 100 mg l−1 in liquid cultures (DT50 = 11·2 days), whereas its degrading capacity was reduced at higher concentration levels (500 mg l−1, DT50 = 20 days). This is the first report for the isolation of a fosthiazate‐degrading bacterium, which showed high potential for use in future biodepuration and bioremediation applications. Significance and Impact of the Study This study reported for the first time the isolation and molecular identification of bacteria able to rapidly degrade the organophosphorus nematicide fosthiazate; one of the few synthetic nematicides still available on the global market. Further tests demonstrated the high capacity of the isolated strain to degrade high concentrations of fosthiazate suggesting its high potential for future bioremediation applications in contaminated environmental sites, considering high acute toxicity and high persistence and mobility of fosthiazate in acidic and low in organic matter content soils.

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“…This may be due to enhanced biodegradation by soil microbes [19]. Such phenomena have been reported in several nematicides (e.g., aldicarb, cadusafos, oxamyl and fosthiazate) [20][21][22][23]. Therefore, a variety of nematicides with different modes of action may be of great demand to avoid potential biodegradation of chemicals due to successive application of a single nematicide [24].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Nematicidal Activity of Fluensulfone against Non-Target Free-Living Nematodes under Field Conditions

et al. 2019

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The use of nematicides with reduced toxic side-effects against non-target free-living nematodes is a favorable option for farmers to control plant-parasitic nematodes. The nematicide fluensulfone was registered in several countries for the control of the root-knot nematodes, Meloidogyne spp. among other plant-parasitic nematodes. This study aimed to evaluate the nematicidal activity of fluensulfone against non-target nematode fauna in four field experiments, each under different conditions (soils types and plant hosts). Nematodes extracted from soil samples were classified and counted based on their morphological characters. Fluensulfone significantly reduced damage caused by root-knot nematodes to tomato and sweet potato plants, while overall non-target free-living nematode population densities were maintained at the same level as those in control. Different diversity indices (e.g., Shannon-Wiener H’, Simpson’s D, species richness, evenness J’, maturity indices) and principal component analyses in the four experiments showed that fluensulfone treatment kept a similar diversity level of non-target free-living nematode fauna to that of the non-treated control. The results suggested that fluensulfone may have minimal impact to free-living nematode fauna in both population density and diversity when the nematicide was applied to control Meloidogyne spp.

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The dissipation of fipronil, chlorpyrifos, fosthiazate and ethoprophos in soils from potato monoculture areas: first evidence for the enhanced biodegradation of fosthiazate

Cited by 22 publications

References 33 publications

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Isolation and characterization of soil bacteria able to rapidly degrade the organophosphorus nematicide fosthiazate

Evaluation of Nematicidal Activity of Fluensulfone against Non-Target Free-Living Nematodes under Field Conditions

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