seasonal abundance of Parlatoria blanchardii (Targ-Tozz) and the associated parasitoid Peteropetrix aegyptica were studied for two successive years (2012-2013) & (2013-2014) on date palm in Qalio1biya Governorate. The obtained results revealed that P. blanchardii found on date palm trees all over the year and had four overlapping generations per a year. The 1st generation started from 1st July to 1st October (summer) with duration of 3-3.5 months, the 2nd started from mid October to mid January (winter), its duration was 3.5-4 months, the 3rd generation started from 1st February till mid April (late winter), its duration was 3 months and finally the 4th generation started from 1st May till mid June (spring). The second year of study had nearly the same result. Peteropetrix aegyptica was a primary parasitoid recorded associated to Parlatoria blanchrdii and had four periods of activity per a year. The highest period was recorded in summer in the first year but it recorded in winter during the second one. Rate of parasitism during the second year was higher than the first year. One Climatic factors (Min, Max. Temp. & R. H.) give positive highly significant correlation with the pest different stages. Multiple regression was insignificant except Min. Temperature which proved positive and highly significant. Also the combined effect of the three climatic factors was positive and significant. The changes in the half monthly count of the nymph, adult, gravid females populations related to the effect of the tested weather factors were 91.02, 92.36&90.3%, respectively during the first year and 95.76, 86.74&80.95%, respectively during the second year of study.