Reduced metribuzin pollution with phosphatidylcholine–clay formulations

Undabeytia, Tomás; Recio, Esther; Maqueda, C.; Morillo, E.; Gómez-Pantoja, Eulalia; Sánchez-Verdejo, Trinidad

doi:10.1002/ps.2060

Cited by 27 publications

(16 citation statements)

References 41 publications

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“…It is a pyrethroid insecticide that was used to control numerous insect pests of field crops (Thomson, 1992). Oral ingestion of this chemical caused vomiting, epigastric pain, nausea and coarse muscular fasciculations.…”

Section: Resultsmentioning

confidence: 99%

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Assessment of Pesticide Residues in Edible and Unhatched Chicken Eggs in Sharkia Province, Egypt

Abdelfatah¹,

Abu-Zeid²

2015

Adv. Anim. Vet. Sci.

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| This work is proposed to investigate pesticide residues in chicken eggs in El-Sharkia Province, Egypt. Analysis of pesticide residues was performed on 120 egg samples included 80 random edible egg samples (40 farm and 40 home produced hen eggs) and other 40 unhatched eggs. Edible eggs were collected from different stores, places and supermarkets. unhatched incubated eggs were collected from different hatcheries during the winter season. Organochlorine pesticides (OCPs) and organophophorous insecticides (OPIs) residue analysis of samples was done using Agilent Gas chromatograph (GC) Model 6890 N. The results revealed presence of OPIs in higher concentration in home produced eggs than that in farm produced eggs, while OCPs present in farm produced egg in higher levels than that in home produced one. Unlike other studies we have not found higher levels of exposure for most pesticides in those consumers choose home produced eggs, and even farm produced eggs. Regarding unhatched eggs dimethioate recorded the highest concentration which exceeded Maximum Residual Limits (MRLs) of (0.05) mg/kg in all the examined samples. None of the other detected pesticide residues exceeded (MRLs). It was concluded that the levels of pesticide residues in edible eggs either home or farm produced eggs should not exceed Accepted Daily Intake (ADI) established by the World Health Organization (WHO) Joint Meeting on Pesticide Residues Report ( JMPR). The study suggests the need for further investigations to determine toxic mechanisms by which dimethoate distress chick emberyos at different developmental stages and result in hatching failure.

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Section: Resultsmentioning

confidence: 99%

“…It is a herbicide used both pre and post emergence in crops and has been set up to contaminate groundwater (Undabeytia et al, 2011). It is slightly to moderately toxic to humans by oral, skin or inhalation routes of exposure (EPA, 1988).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Pesticide Residues in Edible and Unhatched Chicken Eggs in Sharkia Province, Egypt

Abdelfatah¹,

Abu-Zeid²

2015

Adv. Anim. Vet. Sci.

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“…This can lead to enhance the free downward movement of metribuzin in soil profile. Recently, Undabeytia et al (2011) [82] confirmed the role of polar groups (amide) in metribuzin in the formation of water bridges via hydrogen bonding with the hydrophilic head of the non-toxic surfactant phosphatidylcholine in clay formulations. Therefore, in the presence of a non-ionic surfactant, such as Brij35at concentrations above its CMC, metribuzin would be captured by micelles, with its polar groups oriented toward the polar head (EO) of the micelles, which would exhibit a strong hydrophilic interaction via hydrogen bonding or dipole-dipole effects.…”

Section: Effect Of Non-ionic Surfactant Brij35 On Metribuzin In Leachatementioning

confidence: 91%

Effect of the Presence of Nonionic Surfactant Brij35 on the Mobility of Metribuzin in Soil

El-Sayed¹,

Prasher²

2013

Applied Sciences

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Given the water scarcity becoming endemic to a large portion of the globe, arid region irrigation has resorted to the use of treated, partially treated, or even untreated wastewaters. Such waters contain a number of pollutants, including surfactants. Applied to agricultural lands, these surfactants could affect the fate and transport of other chemicals in the soil, particularly pesticides. A field lysimeter study was undertaken to investigate the effect of nonionic surfactant, Brij35, on the in-soil fate and transport of a commonly used herbicide, metribuzin [4-amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one]. Nine PVC lysimeters, 1.0 m long × 0.45 m diameter, were packed with a sandy soil to a bulk density of 1.35 mg m . Antibiotic-free cattle manure was applied (10 mg ha −1 ) at the surface of the lysimeters. Metribuzin was then applied to the soil surface of all lysimeters at a rate of 1.00 kg a.i. ha (i.e., "good", "poor" and "very poor" quality irrigation water) were each applied to the lysimeters in triplicate. Analysis for metribuzin residues in samples of both soil and leachate, collected over a 90-day period, showed the surfactant Brij35 to have increased the mobility of metribuzin in soil, indicating that continued use of poor quality water could influence pesticide transport in agricultural soils, and increase the risk of groundwater contamination.

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“…Furthermore, the increase in soil organic matter enhances degradation (Khoury et al, 2006). A reduction in the recommended dose of metribuzin can be achieved by employing PC-clay formulations, which reduces the environmental risk associated with herbicide applications (Undabeytia et al, 2011). Educational materials should be developed to inform users about the potential problems that metribuzin poses to groundwater quality, and monitoring programs should be established to further investigate its ecotoxicological effects.…”

Section: Ecotoxicologymentioning

confidence: 99%

Metribuzin

Armendáriz¹,

Torre²,

Fernández³

et al. 2014

Encyclopedia of Toxicology

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Reduced metribuzin pollution with phosphatidylcholine–clay formulations

Abstract: A reduction in the recommended dose of metribuzin can be achieved by employing PC-clay formulations, which reduces the environmental risk associated with herbicide applications. Moreover, PC and montmorillonite are non-toxic and do not negatively affect the environment.

Cited by 27 publications

References 41 publications

Assessment of Pesticide Residues in Edible and Unhatched Chicken Eggs in Sharkia Province, Egypt

Assessment of Pesticide Residues in Edible and Unhatched Chicken Eggs in Sharkia Province, Egypt

Effect of the Presence of Nonionic Surfactant Brij35 on the Mobility of Metribuzin in Soil

Metribuzin

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