What is the Olive fly? Bactrocera oleae is the scientific name for the olive fly, also known as the olive fruit fly. It is a serious pest of olive trees and olive production as the female fly lays its eggs on stone as it forms inside the fruit, the larvae then hatch and feed on the fruit's pulp and this can cause significant damage to the crop, read on to understand how to reduce olive fly. So where did the olive fly come from? The olive fly is native to the Mediterranean region but it has spread to other parts of the world where olive trees are grown, these include