Abstract
Codling moth Cydia pomonella L. is a bio-aggressor that causes considerable damage in apple orchards. In Algeria, in the region of Ain-Touta, the damage caused by this pest reached 82.7% in 1998. Chemical control is most often used to repress this micro-Lepidoptere.The knowledge of the life cycle of the species and its spatio-temporal relationship with its host plant is essential in order to consider an appropriate fight against this pest. Our study focused on the bio-ecology of codling mothin two apple orchards, planted with the varieties of Dorset golden and Golden delicious, in regions of Draa Ben Khedda and Sidi Naâmanein Tizi-Ouzou wilaya (Algeria).The eggs enumeration of this micro-Lepidoptera confirms the existence of two generations in Draa Ben Khedda and three generations in Sidi Naamane.The rate of infestation caused by larvae on the fruits on trees reached a percentage of 4.6% in the Dorset golden plot, and 5.3% on the fruits fallen on the ground. In the Golden Delicious plot, the attacks on fruits present on the trees reached a percentage equal to 17.2%, whereas these attacks reached a level of 20.0% on the fruits fallen on the ground.
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