Cycle évolutif et voltinisme du Carpocapse (Cydia pomonella L., Lepidoptera, Tortricidae) exprimés par le piègeage sexuel et les degrés-jours dans la région d'Azrou

The codling moth (Cydia pomonella L.) is a frightful pest in apple fruit production. Its presence in orchards is the cause of considerable damage and fruits are usually unmarketable. In order to determine voltinism of codling moth, the present study investigated the flight movement of populations during 8 growing seasons (2006-2013) in an orchard at Azrou region. The results based on capture of males in the traps and degree days method reveal that Cydia pomonella (L.) can occur in 4 generations. However, in real conditions, the photoperiod, temperature and food availability influence strongly the insect diapause and we have consequently two complete generations while the third and incidentally the fourth are partial.

Keywords: Cydia pomonella, Codling moth, voltinism, Annual generations, Sexual trapping, Degree-days.