In the field in Iraq Ectomyelois ceratoniae had four generations on an artificial diet and four to five generations on pomegranate fruits. On an artificial diet the mean time for development from egg to adult ranged from 41 to 59 days for the first three generations. Fourth-generation larvae entered diapause in the fall and averaged 241 days. Insect population increased progressively during the fruiting season. Mean percentage of infestation increased from 20% by early generations to more than 80%. High infestation was observed in southcentral areas of Iraq. Orchards in which sanitation was poor were highly infested.