The research work was conducted during two successive years 2005 and 2006 on the seasonal abundance and some ecological aspectsof the mango scale insect, Aulacaspis tubercularis infesting mango trees at Qualubia Governorate .
The obtained results denoted that this insect had three peaks which occurred during March, June and November through each of the two studied years while the lowest population was registrated in mid. July Also, data clearly showed that A. tubercularis had four overlapping annual generations during the two studied years. Statistical analysis showed that the climate factors affected the activity of A. tubercularis. Results proved that there were positive correlation between temperature (Min. & Mix.) and all annual generations through the two studied years except the third one. The data proved a negative correlation between R.H % and all insect generations except the second one in the first year.
It is advisable to apply pesticides from mid July till the end of August as summer spraying which was more suitable for, controlling A. tubercularis infesting mango trees .