Egg and larval parasitism of the tomato pinworm (TPW),Keiferia lycopersicella(Walsingham), was studied in southern Florida tomato fields. Larval parasitism ranged from 39.34 to46.26%cin 1980–1981.Apantelesspp. was the most abundant larval parasite, followed bySympiesis stigmatipennisGirault andTemeluchaspp. Egg parasitism byTrichogramma pretiosumRiley ranged from 33 to 92% in fields with low egg density (less than one egg per two leaves) and from 12 to 60% in fields with high egg density (more than three eggs per two leaves). Despite this,T. pretiosumwas considered density independent of TPW population. Parasites were most abundant in abandoned fields from April through June.