Residues and Decay of Some Insecticides in Different Types of Water

Al-Eed, A Mohammed; Abo-El-Saad, Mahmoud M.; Al-Faiyz, Yasair S.

doi:10.3923/jas.2006.1833.1837

Cited by 3 publications

(2 citation statements)

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“…It occurred in descending manner which started from the first day depicted 0.99ppm with 5.9% losses and degrade up to 0.24ppm on the last sampling date, with losses of approximately 97.8%. These results are superior to the results obtained by Al-Eed et al (2006), degradation percentage in hard water was calculated as 85% after two weeks from cypermethrin application, whilein the present study it was 88.1% after the same period of time.…”

Section: Degradation In Watercontrasting

confidence: 50%

“…However, Metwally et al (1997) studied the degradation pattern of cypermethrin in tomato by using HPLC and reported 0.66 ppm insecticides concentration on the first sampling, this concentration was reduced up to 0.28 ppm after 120 hours. Furthermore, Al-Eed et al (2006) conducted a study to evaluate the behavior of cypermethrin reduction in three types of water viz. distilled, mineral, and hard water and reported high cypermethrin residues from all three water types after one week, this concentration reduced up to 75% after three weeks of its application.…”

Section: Introductionmentioning

confidence: 99%

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Patterns of natural degradation of cypermethrin in tomato fruits, water and soil under the desert environment of Ogla Oasis Cyrenaica - Libya

Amer¹,

EL-Awami²,

Elsiddig³

et al. 2015

JEBAS

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Degradation line of cypermethrin were studied in different samples of tomato fruits, water, and soil from ogla oasis in the desert environment of Cyrenaica, -Libya. The targeted insecticide was applied to the tomato crop, water, and soil of the studied area with the recommended dose. Representative samples from all three subjects were taken daily which started from the first day of treatment to the 20 th days of experimentation. Extraction and cleanup were conducted on the 20 th days and finely detection of the residues was measured by using Gas chromatography (GC-ECD) instrument. Results of the study revealed 0.06, 1.06, and 2.44 ppm insecticide concentration on the first sampling date from tomato fruits, water, and soil respectively. However after one week 33, 56 and 65% reduction in insecticide concentration was reported in tomato fruits, water and soil respectively. After 2 weeks the reduction percentage was reported 66%, 88%, and 93% chronologically, and the degradation exert 91%, 97%, and 99.1% in the same order at the last sampling date. Results concluded that the trends of cypermethrin degradation were fluctuating and slow in tomato fruits while in water and soil it appears regular. However the degradation in soil was the fastest.

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Section: Degradation In Watercontrasting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Patterns of natural degradation of cypermethrin in tomato fruits, water and soil under the desert environment of Ogla Oasis Cyrenaica - Libya

Amer¹,

EL-Awami²,

Elsiddig³

et al. 2015

JEBAS

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Estimation of human health risk associated with the consumption of pesticide-contaminated vegetables from Kumasi, Ghana

Akoto

Gavor

Appah

et al. 2015

Environ Monit Assess

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Analysis of pesticides consisting of 12 organophosphates (OPs), 10 organochlorines (OCs), and 6 pyrethroids in vegetables from Kumasi was conducted. Vegetable samples comprising 20 each of eggplants, okra, and tomatoes were analyzed. The method involves solvent extraction of pesticide residues followed by cleanup using silica gel. Residue analysis was carried out using a GC equipped with pulsed flame photometric detector for OP residues and electron capture detector for OC and pyrethroid residues. The results revealed that methamidophos exceeded the maximum residue limits (MRLs) in all vegetable commodities. Levels of malathion and dimethoate also exceeded the MRLs in eggplant and tomato samples. Endrin, α-endosulfan, γ-hexachlorocyclohexane (HCH), γ-chlordane, and heptachlor exceeded their MRLs in okra samples whereas methoxychlor, allethrin, and deltamethrin exceeded in eggplant samples. Health risk estimation revealed that dimethoate in tomato and endrin, heptachlor, γ-HCH, and γ-chlordane in okra could not pose potential toxicity to the consumer. The combined risk index showed no health risk to consumers due to intake of pyrethroid OC and OP residue on these vegetables. The overall risk index for combined pesticides due to consumption of all the vegetables was higher than 1, which signifies potential health risk to consumers. OPs were the major risk contributor for both eggplant and tomatoes which accounted for 87.78 and 95.84%, respectively, of the combined risk of pesticides in the vegetables. However, OC with 97.94% of the combined risk index was the major risk contributor for the okra. The carcinogenic risk of the OCs in okra was of no concern since their carcinogenic rates were below the acceptable risk level.

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Assessment of Pesticide Residues in Vegetables at the Farm Gate: Cabbage (Brassica oleracea) Cultivation in Cape Coast, Ghana

Armah¹

2011

Research J. of Environmental Toxicology

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Residues and Decay of Some Insecticides in Different Types of Water

Cited by 3 publications

References 0 publications

Patterns of natural degradation of cypermethrin in tomato fruits, water and soil under the desert environment of Ogla Oasis Cyrenaica - Libya

Patterns of natural degradation of cypermethrin in tomato fruits, water and soil under the desert environment of Ogla Oasis Cyrenaica - Libya

Estimation of human health risk associated with the consumption of pesticide-contaminated vegetables from Kumasi, Ghana

Assessment of Pesticide Residues in Vegetables at the Farm Gate: Cabbage (Brassica oleracea) Cultivation in Cape Coast, Ghana

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