In this research, 66 samples of tomatoes were collected from vegetables
central market in Darr´aa city during the period extended between 20
October/2009 - 4 October/2010) to investigate the presence of 26 pesticide
residues which belong to differ
ent chemical classes using Gas Chromatography
instruments equipped with μECD, FPD, MSD detectors. QuEChERS extraction
method was used for residue extraction from tomato samples. The detectors
linearity and pesticide detection limits were determined for every pesticide
studied, and the recovery for all pesticides ranged from 90.6 for fenvalerate to
105.5% for propargite. Results showed that 56.1% of tomato samples contained
detectable residues and Chlorpyrifos and cypermethrin were the most detected
pesticides, while amounts of propargite, methamidofos, cypermethrin,
chlorpyrifos were the largest detected and mounted to 0.99, 0.15, 0.015, 0.012
mg/kg respectively as a median values. Residues of methamidofos in only 2
samples were above the European MRLs.,
The effectiveness of some selective pesticides, Pyriproxyfen, Abamectin,
Diflubenzuron, Tiflubenzuron, Amitraz and Diflubenzuron, Amitraz and
Tiflubenzuron and Delta (summer oil).
This research aimed to study the theoretical basis of the pollutant migration
to the aquifer and to carry out some experiments concerning the migration of
some kinds of pesticides in order to calculate the related coefficients. Hence, the
research
concentrates on testing the basic methods of migration to the ground
waters, finding the physico – chemical reactions between pollutants and aquifer
and finding the differential equations which express the movements to the
ground waters which can be applied on the experimental data. It also, includes
the mechanism study of pollutant migrations through the unsaturated layer is
regarded as a passage of the pollutants to the ground waters, and the
experimental methods of the calculation of the basic migration coefficient.
This research outlines the legal regulations for this kind of pollution
in Iraq, Egypt and Syria by defining pesticides, their source and
harmful effects on humans and the environment; and then outlining
the laws that control it in the above-menti
oned countries which put
preventive and punitive measures to protect air from pollution by
pesticides to ensure the best level of protection of public health; one
of the aims of administrative regulations for the protection of the
environment. It also presents applicable suggestions and
recommendations that help any one who aims at reaching good
management of pesticides and a clean environment.
The research was performed by isolating some species of soil- fungi from agricultural soils
handling with different pesticides and fungicides. Where the following fungi were isolated:
Aspergillus niger (The isolates A1 and A2), Fusarium oxysporum (
The isolate F),
Trichoderma harzianum (The isolate T). Also F. solani (The isolate F7) and T. viride (The
isolate T.v) were used, whereas they were taken from high studies laboratory- Science
Faculty- Tishreen University at a previous search.
The research was conducted to assay the ability of the previous fungi to degradation a
number of pesticides, the insecticide "Dolan", the insecticide "Plantocide", the nematicide
"Vydate" and the fungicide "Bayfidan", through the effect of double dose of each
pesticides in the biomass of the studied fungi on PDB medium. In addition to analysis the
results residues of pesticides using Spectrophotometer, and evaluation the pH values.
