الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
This study aimed to : The purpose of the research ecological and biological studies on mealybug Seychellarum, as well as insects predators associated to different fruit and ornamental trees. In this study, the fruit trees that are persimmon plant and mango plant and guava plant, loquat plant and definition decorations that such a plant Ficus plants and palm ornamental trees definition and statement of the importance of insect mealybug Seychellarum, Icerya seychellarum (Westwood) that infect these plants and study the coccinellid predator, Rodalia cardinalis associated with mealybug Seychellarum, as well as the statement of the effect of different plant families on the biological characteristics of an insect pest. One of the main results obtained were : - The highest peak of the mealybug Seychellarum, I. seychellarum on the persimmon was at the beginning of August 2013 and mid-November 2014. - The highest peak of the I. seychellarum on loquat was at the beginning of November 2013 and the first week of May 2014 during the seasonal study. - The highest peak of the I. seychellarum on mango plant at the beginning of October 2013 and the beginning of October 2014 through the seasons. - The highest peak of the I. seychellarum on the guava plant was at the beginning of November 2013 and the third week of November 2014 through the seasons. - The highest peak of the I. seychellarum on Ficus was at the beginning of October 2013 and the beginning of October 2014 within two seasons of the study. - The highest average number of I. seychellarum during the two years recorded in autumn on the all host plants. - The highest average number of Rodalia cardinalis during the two years recorded in summer on persimmon trees and in spring on loquat trees while on mango, guava and ficus trees were recorded in autumn. - Persimmon was more attractive plant varieties to I. seychellarum mealy bugs during the first year 2013/2012. - Loquat they are the most attractive plant varieties to I. seychellarum during the second year 2014/2015. - Predator R. cardinalis was higher plant persimmon attractive to him during the two seasons of the study. - Survival rate for nymphal stage to mealybug I. seychellarum was higher on the ornamental palm, followed by persimmon. - The suitability host plants for I. seychellarum in decreasing order was ornamental palm, persimmon, ficus, loquat, guava and mango. -The longest oviposition period, the longest adult longevity and the highest fecundity when reared I. seychellarum on ornamental palm.