This paper presents the study of population fluctuation of Anastrepha fraterculus (Wiedemann, 1824) and Ceratitis capitata (Wiedemann, 1830) in peach orchards in Porto Alegre city. The peak for A. fraterculus was in November and December and for C. capitata in December and January. There was no significant difference among the population levels in the cultivars Fla 13-72, Premier and Marli.
Diptera; Tephritidae; Anastrepha fraterculus; Ceratitis capitata; population fluctuation; fruit flies