L.A. WATCH: FRUIT FLY ALERT NEAR PASADENA, AGRICULTURAL QAUARANTINE IN EFFECT...

Seven White Stripe Fruit Flies were detected in traps on the far western edge of Claremont, CA. So, if your local market's fruit selection is dense, and prices have gone up, this is why. Pop the Trunk for the California Food and Drug Administration's explanation of the infestation.
Via the CFDA:

Seven white striped fruit flies have been detected recently in traps in the area, marking the first time this pest has been detected in the Western Hemisphere. The fly is native to tropical Southeast Asia, where it damages the fruit of many trees, most notably guava and mango. Damage occurs when the female lays eggs inside the fruit. The eggs hatch into maggots that tunnel through the flesh of the fruit, making it unfit for consumption.

Beginning on August 1, CDFA eradication crews will place several thousand traps containing a "male attractant” lure and a small amount of pesticide. The traps will be hung in trees throughout approximately 15 square miles in the La Verne area. These traps, also known as “bait stations,” attract and kill the male flies, effectively eliminating breeding. Within 200 meters of the sites where the seven flies were trapped, crews will also apply ground treatments with an organic-approved product [note: the product is Spinosad*, chemical diagram right; it is highly toxic to bees] to the foliage of trees to ensure that any established breeding populations are eradicated.

Residents of properties that are scheduled for traps or foliage treatments will be notified prior to the application.

Residents with questions about the treatment program may call the department’s Pest Hotline at 1-800-491-1899.

So, what their doing is using a lure trap to kill the male White Striped Fruit Flies, as to prevent further breeding. How did they get from Asia to California? (Confused!) [Source]