The Olive Fruit Fly is one of the only pests an olive tree, and olive fruit has.

I wanted to show the damage Olive Fruit Fly can have on olive fruit.  If you farm olives, you understand how annoying and devastating a bad infestation can be. In this video, I cut the olive open to inspect the damage and find the larva of the fly that has advanced to the pupa stage. This whole process starts with an adult fly landing on an olive, puncturing it, and laying an egg inside the meat of an olive. This is one of the only pests an olive tree has. Read more here: The Olive Fruit Fly – Wikipedia, Paul Vossen, UC Davis.

Olive fruit fly pupa, can hibernate for 4 months inside the olive.

Olive fruit fly puncture in an olive, getting ready to cut it open to inspect the damage.