الفهرس 
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Abstract
Mango, Mangifera indica L. is considered one of the most important fruit crops in Egypt. The total area of mango trees reached 240804 feddans. The present study was carried out in treated and untreated mango orchards, located in Sherbin district, Dakahlia governorate to know some ecological information concerning lepidopterous pests and their associated natural enemies inhabitant mango inflorescences during two successive seasons (2016 and 2017). Four lepidopterous species were recorded with relatively high numbers on inflorescences of mango trees, namely, Eublemma gayneri, Cryptoblabes gnidiella, Ephestia cautella and Gymnoscelis pumilata. In addition, one lepidopteran species was recorded with relatively few numbers namely, Cydia phaulomorpha. Three predaceous insect species were observed on mango inflorescences infested with lepidopterous pests, namely Orius sp., Geocoris ochropterus and Syrphus sp. The semi-lopper worm population exhibited three peaks of abundance annually; The larvae of HM were associated with the presence of honeydew excreted by the mealy bug, Planococcus citri in the untreated orchard only. The almond moth population exhibited three peaks of abundance annually in the untreated orchard in both years, G. pumilata and C. phaulomorpha population showed two annual peaks of activity in the untreated and treated orchards. Orius sp. population exhibited three peaks of seasonal abundance in both untreated and treated orchards during 2016 and 2017, Population of G. ochropterus showed two peaks of abundance in untreated orchard, during the first and second years. The larvae of E. gayneri were found to be parasitized by the endo-parasitoid species; Wohlfahrtia sp. belonging to Order: Diptera, Family: Sarcophagidae. The parasitoid was recorded as firstly observation in Egypt on E. gayneri larvae infested mango inflorescence. Tachina larvarum (Diptera, Tachinidae) was recorded on C. gnidiella larvae infesting mango inflorescence in untreated orchard. Larvae of E. cautella were found to be parasitized by the endo-parasitoid, Sarcophaga pharaonis Rohdendorf (Diptera, Sarcophagidae) in mango inflorescences, for the first observation in Egypt. Methanol approved to be the best solvent for kairomone extraction of E. gayneri larvae; however, methanol extract attracted the highest percentage of parasitoid adults (80.0%). Under field conditions, a relatively high number of parasitoid had been caught mostly in methanol and methylene chloride traps than in the petroleum ether traps.