الفهرس 
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Abstract
The author wishes to express his deep gratitude to his
supervisors; Professor Dr. Shawky Mohamed Ibrahim !~etwally
Professor of Economic Entomology and Professor Dr. Ahmed Saad
El-Deen El-Khodar~Professor of Economic Entomology in Plant
Protection Department, Faculty of Agriculture, Kafr El-Sheikh,
Tanta University for their valuable supervision, their suggestions
and encouragement through this work. They spent much
of thei~ time and efforts in guiding this study to a successful
culmination.
Also, thanks to Dr. Ahmed Haf~z Assistant professor of
pesticides for his keen advice through this work.
And al~o, special thanks to the Research Institute of
Medical Entomology, Dokki, Ministry of Health for providing
facilities for this study.