The white scale Parlatoria blanchardi is one of the main pests of the date palm. The objective of this work is to study the population dynamics of Parlatoria blanchardi during one year in the variety of Deglet Nour in the region of Biskra. Monitoring over one year made it possible to know the evolution the larvae, and of the adults of the white scale. During the study period we note the presence of 3 annual generations, spring, summer and fall. The study of the abundance of Parlatoria blanchardi according to orientations shows that the white scale prefers the south and west orientation of date palm, with proportions ranging from 28.42% and 27.5%. She prefers places protected from sunstroke to thrive. The abiotic factor such as temperature plays a key role in the proliferation of white scale.