This is the first record of the ash whitefly Siphoninus phillyreae (Haliday, 1835) and its parasitoid Encarsia inaron (Walker, 1839) on Fraxinus sp. in Morelos, Mexico.This is the first record of the ash whitefly Siphoninus phillyreae (Haliday, 1835) and its parasitoid Encarsia inaron (Walker, 1839) on Fraxinus sp. in Morelos, Mexico