Pauesia antennata Mukerji (Hymenoptera: Braconidae) is the parasitoid, commonly recorded on the brown peach aphid, Pterochloroides persicae Chlodkovsky (Hemiptera: Aphididae) in almond orchards in Tunisia. Adult developmental time, rate of mummification, rate of emergence and sex ratio of P. antennata were determined in a greenhouse for 2 generations. In the field, 6 couples of the parasitoid were introduced to 3000 host individuals and then the presence of mummies of P. persicae on almond trees proved the host's acceptance with (35%) rate of mummification, (10%) rate of emergence, (0.55%) sex ratio and (13.48±2.08) days post embryonic time. Also, dispersion of the parasitoid was accomplished by migration to low part during the controlling period. [ABSTRACT FROM AUTHOR]