الفهرس 
abstractOnly 14 pages are availabe for public view
 |  | from | 145 |  |  |
| | | from | 145 | | |
Abstract
In the present study, field studies on the population dynamics of some certain pests and their associated natural enemies were carried out to evaluate the presence of those pests and their natural enemies on some vegetable and field crops (Cotton, Cucumber, Tomato, pepper and Egg-plant) during summer 2012.
.The current investigation was carried out to study the effect of certain temperatures on the biology, development and life table of the two spotted spider mite, Tetranychus urticae and some of it’s predatory mites (Phytoseiulus persimilis , Amblyseius gossypii and Lasioseius sp) under laboratory temperatures of 15±2°C, 20±2°C, 25±2°C and 30±2°C., and 70± 5% R.H., the results suggested all of mites was able to develop and reproduce within a wide range of temperatures, and that temperatures from 27- 30°C are the most suitable conditions for the development, survivorship and reproduction of the mite.
On the other hand, Semi-field experiments occurred to study the effect of certain predatory mites and some compounds (Vertimec, Lambda-Cyhalothrin and Nat-1) in order to enhance biological control provided by predatory mites. Results that the numbers of T. urticae mites that were presented before and after the time of compounds application is very important for achieving satisfactory chemical control.