Effect of a Nalco-Trol® II on bioavailability of glyphosate in laboratory trials

Sundaram, A.

doi:10.1080/03601239009372692

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…The rapid degradation of pesticide molecules is among the factors which contribute to reduced contamination of groundwater in the area. Sundaram [81] reported that for sub-surface soils, most of the pesticides get degraded within 14 days. For example, chlorpyrifos is degraded within approximately 10 days in a 0-15 cm and 40-60 cm clayey sandy soil.…”

Section: Pesticide Residuesmentioning

confidence: 99%

Impacts of Emerging Agricultural Practices on Groundwater Quality in Kahe Catchment, Tanzania

Lwimbo

Komakech

Muzuka

2019

Water

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This paper assesses the impacts of farmers’ intensive use of agrochemicals (fertilizers and pesticides) on groundwater quality in the Kahe catchment. Samples were collected during the wet and dry seasons of the year 2018 and analyzed for the presence of agrochemicals in the water. Groundwater chemistry was dominated by magnesium-sodium-bicarbonate (Mg-Na-HCO3−). The cations levels were in the trend of Mg2+ >Na+ > Ca2+ > K+, whereas anions were HCO3− > Cl− > SO42− for both seasons. The NO3− had an average value of about 18.40 ± 4.04 and 7.6 ± 1.7 mg/L in the wet and dry season, respectively. Elevated levels of nitrate, sulfate, phosphate, and ammonium were found in water samples collected near the large-scale sugarcane plantation in the catchment. For both seasons, Pb, Cd, Fe, Mn, Zn and Cu concentrations averaged approximately 0.08 ± 0.03, 0.11 ± 0.03, 0.16 ± 0.02, 0.11 ± 0.01, 0.46 ± 0.05, and 0.55 ± 0.02 mg/L, respectively. On the other hand, the concentrations were higher in shallow wells than in the deep boreholes. Pesticides’ residues were below the detection limit in all sampled groundwater. The findings from this study provide important information for intervention in groundwater quality management in Kahe Catchment, Tanzania.

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Section: Pesticide Residuesmentioning

confidence: 99%

Impacts of Emerging Agricultural Practices on Groundwater Quality in Kahe Catchment, Tanzania

Lwimbo

Komakech

Muzuka

2019

Water

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“…After application, GLYP is readily transported from the leaves through the plant within the first hours [3,14,15]. The median half-life of GLYP in water varies from a few to 91 days.…”

Section: Introductionmentioning

confidence: 99%

Determination of Glyphosate in Dried Wheat by 1H-NMR Spectroscopy

et al. 2020

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A wheat field was sprayed with a dosage of 1.1 kg a.i./ha Roundup PowerMax 10 days before harvest. The 1H Nuclear Magnetic Resonance (NMR) spectroscopy was used for the detection and quantification of the glyphosate (GLYP) in dried wheat spikelets, leaves, and stems. The quantification was done by the integration of the CH2-P groups doublet at 3.00 ppm with good linearity. The GLYP content varied between different samples and parts of the plant. On average, the largest content of herbicide was found in leaves (20.0 mg/kg), followed by stems (6.4 mg/kg) and spikelets (6.3 mg/kg). Our study shows that the 1H-NMR spectroscopy can be a rapid and reliable tool for GLYP detection and quantification in the field studies.

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“…The rapid degradation of pesticide molecules is among the factors which contribute to reduced contamination of groundwater in the area. Sundaram (1990) reported that for subsurface soils, most of the pesticides get degraded within 14 days. For example, chlorpyrifos is degraded within approximately 10 days in a 0-15 cm and 40-60 cm clayey sandy soil.…”

Section: Pesticide Residues On Groundwatermentioning

confidence: 99%

Groundwater recharge estimation and quality on the southern slopes of mount Kilimanjaro, Tanzania

Lwimbo

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This study was undertaken to estimate groundwater recharge rates using three methods (water table fluctuation (WTF), chloride mass balance (CMB) and soil moisture balance (SMB), as well as assessing the impact use of the pesticides and fertilizers on groundwater quality in a Kahe catchment located on the Southern slope of Mt. Kilimanjaro, Tanzania. The estimated recharge rates of the WTF method yielded a higher value of about 248.4 million m 3 /year, whereas that of CMB and SMB methods was 156.0 and 132.1 million m 3 /year, respectively. The concentration of pesticide residues was below the detection limit, while, NO 3 - levels of sampled groundwater were averaged about 18.40 ± 4 and 7.6 ± 1.7 mg/l in the wet and dry season, respectively. An elevated level of nitrate (NO 3 - ), sulfate (SO 4 2- ), phosphate (PO 4 3- ), and ammonium (NH 4 + ) was found nearby the large-scale sugarcane farms. Generally, the groundwater chemistry was dominated by magnesium-sodium-bicarbonate (Mg-Na-HCO 3 ) water type. The cations levels were in the trend of Mg 2+ > Na + > Ca 2+ > K + , whereas anions were HCO 3 - > Cl - > SO 4 2- for both seasons. The heavy metals concentration of Pb, Cd, Fe, Mn, Zn and Cu for both seasons were averaged approximately 0.08 ± 0.03, 0.11 ± 0.03, 0.16 ± 0.02, 0.11 ± 0.01, 0.46 ± 0.05 and 0.55 ± 0.02 mg/l, respectively. Whereas the concentration was higher in shallow groundwater than deep boreholes and most of them were located around the western-eastern zone of the Kahe catchment. The findings from this study provided reliable data information for future monitoring programs of groundwater resources management in Kahe catchment, Tanzania.

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Effect of a Nalco-Trol® II on bioavailability of glyphosate in laboratory trials

Cited by 6 publications

References 24 publications

Impacts of Emerging Agricultural Practices on Groundwater Quality in Kahe Catchment, Tanzania

Impacts of Emerging Agricultural Practices on Groundwater Quality in Kahe Catchment, Tanzania

Determination of Glyphosate in Dried Wheat by 1H-NMR Spectroscopy

Groundwater recharge estimation and quality on the southern slopes of mount Kilimanjaro, Tanzania

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