The present work was carried out to study the following objectives: -
I.    Survey of phytophagous pests and predators inhabiting vegetable crops (eggplant, tomato, pepper and okra).
II.  Studying the population fluctuation of the major insect and mite pests on Eggplant, Tomato, Pepper and okra in relation to prevailing weather factors such as temperature, relative humidity and plant age, and their natural enemies.
III. Evaluate the susceptibility of four vegetables eggplant, okra, pepper and tomato to infestation rate of different pests.
IV. Relation between phytochemical components of leaves from four host plants and the population fluctuation of certain pests.
V.  Effect of different host plants on the development and life table parameters of Aphis gossypii (Hemiptera: Aphididae) on Eggplant, Tomato, Pepper, Okra and Sowthistle.
VI. Biology and life table parameters of cabbage white butterfly, Pieris rapae L. (Pieridae: Lepidoptera) on cabbage, cauliflower, and broccoli leaves.
VII. Effect of different host plants on nutritional indices of cabbage white butterfly, Pieris rapae L. (Pieridae: Lepidoptera) on different cabbage varieties