Determining the appropriate spray time to control Cydia pomonella L. (Lep., Totricidae) in apple orchards using sex pheromone traps and degree-day method in Urumia

Codling moth Cydia pomonella L. (Lep., Tortricidae) is the most important pest in iranian apple orchards. In order to avoid the unnecessary usage of chemical pesticides, using pheromone traps is the most effective control way. We have used these traps in 4 areas of different altitudes in Urmia villages. We counted the trapped insects twice a week. The results showed that this pest has three full generations in Urmia and their maiden appearance is in late April, with each generation peak in late May, mid-July and mid-August. The results show the best time to counter the pest is in the first generation, 5 to 7 days after flight peak and the 2nd and 3rd generations 4 to 5 days after flight peak.