The present studies were carried out during 2011-2012 and 2012-2013 on cumin growing seasons.The main objective was to study population age structure of the green peach aphid, Myzus persicae (Sulzer) infesting cumin plants in Assiut, Upper Egypt.When using beginning of cumin planting as a starting date, data show that the migration of the green peach aphid from overwintering site into cumin fields...