الفهرس 
Literature reviewOnly 14 pages are availabe for public view
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Abstract
The Seychelles fluted mealybug Icerya seychellarum (Westwood) was the dominant species infesting Abdel Razik and Baladi cultivars of custard apple, Annona squamosa L, at two selected Farms in Giza Governorate. I. seychellarum was found on both cultivars of custard apple in nearly all months of the year. The percentage of half-monthly counts of the total population fluctuated throughout the year showing four peaks, depressions and annual generations on leaves and branches. On fruits, two peaks of abundance were recorded at the first of October and mid-November. The population of nymphs was greater than adults in numbers. The population density of I. seychellarum on Abdel-Razik cultivar of custard apple was significantly higher than that on Baladi cultivar. The rate of infestation with I. seychellarum at Al-Qahera 2000 Farm was generally higher than that at Al-Marutyia farm. The southern side of the plant had significantly the highest population of mealybugs followed by eastern and western sides. The correlation between temperature and % relative humidity was also investigated. The population fluctuation of the predator, Rodolia cardinalis on custard apple followed the population trend of I. seychellarum with similar population peaks and falls. Infestation by I. seychellarum leads to morphological and histological alterations in leaves and stems of the plant and significant and marked deleterious effects on almost all chemical constituents of the fruits. Fruits of Abdel Razik cultivar were more affected by infestation than Baladi cultivar.