Article: PESTICIDE-RESIDUE RELATIONSHIP AND ITS ADVERSE EFFECTS ONOCCUPATIONAL WORKERS IN DAKAHLYIA, EGYPT[show abstract] [hide abstract]
ABSTRACT: This study was designed to determine pesticide residues in blood, evaluate its effect on biochemical parameters and assess adverse health effects in farmers, pesticide market-workers and pesticide sprayworkers. The level of awareness or knowledge about precautionary measures for pesticides safety was also assessed. The field survey indicated that 40.0, 6.7 and 12.0% of farmers, market-workers and spray-workers, respectively, did not wear protective clothing. However, most of them (83.3, 93.3 and 88.0%) had knowledge about the safety precautions to be taken during pesticide formulation and application. Significant decrease in hemoglobin level and platelet count was detected in spray-workers, but significant increase in white blood cell count was noticed in pesticide-market workers and spray-workers. No significant changes were observed in liver function, but significant inhibition in acetylcholine esterase activity and significant increase in prothrombin time were noticed in all pesticide-exposed subjects. A significant rise in urea concentration was observed in pesticide-spray workers, but no significant differences in creatinine level were seen. The residue analysis revealed that 76.7, 92.5 and 100.0% of farmers and market- and sprayworkers, respectively, had insecticide residues in their blood. Also, most of the study subjects had multiple residues above the acceptable daily intake. Therefore, creating the awareness among pesticide users to improve and encourage safe use and handling of pesticides through education, proper guidance and fore-warning about the risks involved in misuse of poisonous materials are required.Journal of Applied Biological Sciences 06/2012; 14(1-14 (1)):24 - 32.
Article: THE INFLUENCE OF SOIL MICROORGANISMS AND BIO- OR -ORGANIC FERTILIZERS ON DISSIPATION OF SOME PESTICIDES IN SOIL AND POTATO TUBERSShehata E.M. Shalaby, Gehan Y. Abdou[show abstract] [hide abstract]
ABSTRACT: The influence of soil microorganisms, biofertilizer and compost fertilization on the persistence of the two organphosphorus insecticides, chlorpyrifos, ethoprophos and carbamate insecticide, carbofuran were studied under semifield experimental conditions. Residue analysis of the initial samples of the three applied pesticides, chlorpyrifos, ethoprophos and carbofuran was relatively high (68.3, 76.0 and 80.9 ppm, respectively) in uncultivated, unfertilized and unsterilized soil. These amounts were decreased to 10.12, 14.6 and 12.0 ppm showing 85.18, 80.79 and 85.17% loss, respectively at 6 weeks after treatments. The initial deposits of these pesticides in potato cultivated soils (control) were 70.77, 74.17 and 81.17 ppm, respectively, graduate dissipation of tested pesticides was noticed through the successive intervals. At the end of the experimental period, residues detected revealed 93.0, 91.5 and 94.37% loss, respectively. Addition of certain bioactive (microbal and compost ) amendments was able to induce the pesticide degradation in the contaminated soil (the highest degradation levels was noticed in biofertilized soil, > 99.99, 99.33 and 96.11%). On the other hands, obtained data clearly showed that microorganisms living in soil play role in pesticide biodegradation. In other words, the percentages of loss of chlorpyrifos, ethoprophos and carbofuran residues were 86.35, 83.91 and 82.32% in sterilized soils, respectively, at 6 weeks after treatments. Obtained data indicated also, the residual values of tested insecticides on or in potato tubers were more than the maximum residue limits (MRL) in all treatments, this means that the tested insecticides have a translocation and accumulating properties in potato tubers.Journal of Plant Protection Research 03/2010; 50(1-Vol. 50, No. 1 (2010)):86 - 92.