الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
Eggplant and pepper are considered as the most important and economic vegetable crops, widely cultivated in tropic and sub-tropic regions through the world. These vegetable plants are liable to be infested with various arthropod pests (insects and mites) causing a serious damage.
Previous works were reviewed, materials and methods were explained, then results were tabulated, illustrated, statistically analyzed, discussed and summarized. The dissertation was entailed with arabic summary.
For the effectiveness of insects and mites on eggplant and pepper varieties, the present work was carried out to embrace the following topics:
4.3. Ecological studies:
4.3.1. Survey of arthropod species on eggplant and pepper varieties:
4.3.2. Survey of certain arthropod species on eggplant varieties:
The survey studies revealed the presence of 14 insect species belonging to 13 genera under 12 families from 8 orders, in addition to the two-spotted spider mite, Tetranychus urticae Koch on three eggplant varieties in both experimental farms (Fac. of Agric and El-Ghorieb).
4.3.3. Survey of certain arthropods on sweet pepper:
On sweet pepper, (Capsicum annuum) eleven arthropods pests belonging to 10 genera under 10 families from 7 orders are found to be infested sweet pepper in the two experimental farms.
4.3.4. Seasonal abundance of the piercing-sucking insect pests on eggplant and pepper varieties:
Three economic insect pests were chosen (i.e. T. palmi; B. tabaci and E.decipiens) in order to study the population abundance on eggplant and pepper varieties in both farms (Fac. Agric. and El-Ghorieb) during the two successive years of 2009-2010 and 2010-2011.
The populations of the three insect pests was high in the second year as compared with the first one and all eggplant and pepper varieties are strongly liable to be infested with the three insect pests in both expermential farms.
Data also revealed that, during summer of both years, the numbers of collected three insect pests were at the highest level, while the lowest ones were registered during winter. Spring and autumn were inbetween in both farms during the two years of study.
4.3.5. Seasonal abundance of the two-spotted spider mite, T. urticae Koch eggs and motile stages on eggplant and pepper varieties in both farms during 2009-2010 and 2010-2011:
In both experimental farms, the highest numbers of observed T. urticae eggs were recorded during winter on eggplant and pepper varieties. While, summer exhibited the highest numbers of T. urticae motile stages.
4.3.6. Effect of certain variable factors on the population densities of four arthropod pests infesting eggplant and pepper varieties:
This study was carried out in two experimental farms (Fac. of Agric. and El-Ghorieb), in order to explain the influence of certain variable factors affecting the population density of four arthropod pests (T. palmi, B.tabaci, E. decipiens and T. urticae) on eggplant and pepper varieties during two successive years, 2009-2010 and 2010-2011. These factors were: plant age, natural enemies, maximum and minimum temperature, maximum and minimum temperature of soil (5cm depth) and maximum and minimum relative humidity. It can be concluded that, temperature, plant age and natural enemies are the most variable factors affecting the population changes of the four arthropod pests on eggplant and pepper varieties in the two experimental farms during both studied years, 2009-2010 and 2010-2011.
4.4. Taxonomy and ecology of soil mites:
4.4.1. Survey and identification of certain predacious mite species inhabiting the soil under eggplant and pepper varieties:
During the year of study (2009-2010), 8 species of the predacious Mesostigmata mites pertaining to 7 genera and 5 families (i.e., Lasioseius thermophilus Willmans, 1942; Protogamasellus denticus Nasr, 1978; Macrocheles merdarius (Berlese, 1889); M. muscadonesticae (Scopoli, 1772); Amblyseius noir (Karg, 1970); Leiodynychus krameri (Canestrini, 1882); Uropoda sp. and Rhodacarellus tebeenus Hafez and Nasr, 1979) in addition to three Oribatei mite species (Oppia sp.; Zygoribatula sp. and Ephilomannia sp.) belonging to 3 genera and 3 families were recorded in the soil under eggplant and pepper varieties.
The monthly and seasonal abundances of mite species inhabiting soil under eggplant and pepper varieties were also recorded.
Data clearly indicated that, summer and spring exhibited high population of the predacious mite species. While, autumn received the lowest one. The relationships between maximum and minimum temperature versus the population densities were also possible ( r= 0.5940 & 0.6455) for maximum and minimum temperature at 5cm depth under the soil of eggplant varieties and (r= 0.4764 & 0.5387) for both temperatures in case of soil of sweet pepper.