Degradation of three phenylurea herbicides (chlortoluron, isoproturon and diuron) by micromycetes isolated from soil

Khadrani, A.; Seigle‐Murandi, F.; Steiman, R.; Vroumsia, Toua

doi:10.1016/s0045-6535(98)00510-4

Cited by 71 publications

(62 citation statements)

References 24 publications

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“…Biotransformation of phenylurea herbicides by soil microorganisms (bacterial and fungi) has been reported by several authors (Badawi et al, 2009;Khadrani et al, 1999;Sørensen et al, 2003;Tixier et al, 2002). Bacteria degrade phenylurea herbicides by successive Nwww.intechopen.com dealkylation to substituted aniline products.…”

Section: Biodegradation Of Phenylurea Chlorotoluronmentioning

confidence: 98%

A Critical View of the Photoinitiated Degradation of Herbicides

Klementová¹

2012

Herbicides - Properties, Synthesis and Control of Weeds

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Section: Biodegradation Of Phenylurea Chlorotoluronmentioning

confidence: 98%

A Critical View of the Photoinitiated Degradation of Herbicides

Klementová¹

2012

Herbicides - Properties, Synthesis and Control of Weeds

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“…The best results of degradation were obtained with Bjenkardera adusta and Oxysporus species that were the most efficient towards three substrates. After two weeks Bjenkardera adusta depleted chlortoluron 98%, diuron 92% and isoproturon 88% (Khadrani et al 1999).…”

mentioning

confidence: 95%

Chlortoluron behavior in five different soil types

Kočárek¹,

Kodešová²,

Kozák³

et al. 2005

PLANT SOIL ENVIRON

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Chlortoluron transport was studied in five different soil types and under varying climatic conditions. The chlortoluron mobility in the monitored soils increases as follows: Albic Luvisol = Haplic Luvisol < Haplic Cambisol < Haplic Stagnosol < Greyic Phaozem. Significantly high concentrations in the top layer of Haplic Stagnosol were observed due to the high presence of coarse gravel (30-40%) and flow profile reduction up to 60%. The content of remaining chlortoluron in the soil profile corresponds to the herbicide mobility. The percentages of remaining chlortoluron were 46.1% in Albic Luvisol, 54.6% in Haplic Luvisol, 65.0% in Haplic Cambisol, 69.6% in Haplic Stagnosol and 102.9% in Greyic Phaozem. The highest herbicide degradations were at the locations with lower observed mobility and herbicide present mainly in the top layer. Occurrence of the remaining chlortoluron percentage in Greyic Phaozem higher than 100% was caused mainly by the herbicide transport through the preferential paths and restricted degradation in subsurface layers. Variability of chlortoluron distributions in the soil profiles observed at the three positions of the same location occurred due to the heterogeneity of the soil profile and an uneven distribution of chlortoluron on the soil surface. The BPS mathematical model (Kozák and Vacek 1996) connected with the soil database was used to simulate chlortoluron transport. The simulated chlortoluron concentrations follow approximately the measured data except for Greyic Phaozem, where a preferential flow highly influenced solution transport. The BPS model with the soil database can be used for estimation of the chlortoluron transport.

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“…12,13) The degraded products of the pesticides then have the potential to be ingested by humans with agricultural products. Some of these are often more toxic than the parent pesticides.…”

Section: Introductionmentioning

confidence: 99%

Comparative Photodegradation Study of Fenthion and Disulfoton under Irradiation of Different Light Sources in Liquid- and Solid-Phases

Hirahara

Ueno

Nakamuro

2001

JOURNAL OF HEALTH SCIENCE

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To assess the photodegradation extent of the organophosphorus pesticides, fenthion and disulfoton in the environment, degradation rates of their chemicals under irradiation by visible light and each region of the ultraviolet (UV) sources, UVA (320-400 nm radiation), UVB (280-320 nm radiation) and UVC (250-260 nm radiation) in liquid-and solid-phases were determined and their photolysis products identified. Although visible light did not cause photodegradation of either fenthion or disulfoton even after the maximal irradiation of 8 hr in both phases, all the ranges of UV sources resulted in the photolysis of both pesticides, despite the solid-phase. The photolysis rates of fenthion under UVB and UVC irradiation in both phases were higher than that under UVA irradiation and also exceeded all of the degradation rates of disulfoton. This confirms that fenthion is more readily degraded than disulfoton in the UVB range. Fenthion sulfoxide and disulfoton sulfoxide were identified as oxidative photolysis products whose photolysis rates were considerably slower than parent compounds, and the oxidation reaction of both pesticides in the liquid-phase was superior to those on the solid-phase, indicating that dissolved oxygen in water is an important factor affecting the photolysis. These results suggest that fenthion in the environment is more rapidly degraded by UVB irradiation in natural sunlight than disulfoton, and sulfoxides of both pesticides remain stable as a photolysis product in the environment.

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Degradation of three phenylurea herbicides (chlortoluron, isoproturon and diuron) by micromycetes isolated from soil

Cited by 71 publications

References 24 publications

A Critical View of the Photoinitiated Degradation of Herbicides

A Critical View of the Photoinitiated Degradation of Herbicides

Chlortoluron behavior in five different soil types

Comparative Photodegradation Study of Fenthion and Disulfoton under Irradiation of Different Light Sources in Liquid- and Solid-Phases

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