TITLE:
Nemacur Residue Analysis in Soil Water and Cucumber Samples Collected from the Field in Gaza Strip, Palestine
AUTHORS:
Mohammed Ouda Alloh, Said AL-Kurdi, M. R. Alagha, El-Nahhal Yasser
KEYWORDS:
Nemacur, Fenamiphos, Chemo-Assay, Bioassay, Soil
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.3,
February
27,
2018
ABSTRACT: Application of Nemacur in Gaza strip increased
rapidly as a potential alternative to the widely used soil sterilizing agent
methyl bromide. Nemacur application may contaminate soil, water and plant
systems due to its high solubility in water. The objective of this study was to
determine Nemacur residues
soil, water, and cucumber samples collected from a field plots applied Nemacur at different field rates (0.0, 0.5 F, 1 F, 2 F) where
F is the recommended field rate of Nemacur
(4 kg/Hectare). Nemacur
residues were determined by chemo-assay and
bioassay techniques. Results revealed that considerable Nemacur concentrations were found in
cucumber fruits and plant leaves. Nemacur residues
were higher in water samples collected from sandy soil (7.2 μg/L) than from
clay soil (3.4
μg/L). Furthermore, Nemacur residues in sandy soil (0.23 μg/kg) were lower than those in clay soil (1.3 μg/kg). In addition,
Nemacur concentration
in top soil layer in clay soil was lower
than other layers. Nemacur residues in cucumber fruits grown in sandy soil were lower than those in
cucumber fruits grown in clay soil. Nemacur residues in cucumber fruits
collected from the market were below detection limit of HPLC technique.
Chemo-assay techniques determined lower concentration of Nemacur than bioassay
techniques. It can be concludes that considerable concentrations of Nemacur were found in all
tested samples. Comparing with maximum residues limits (MRLS). Nemacur concentrations in various environmental samples were
less than the maximum residues limits.