Why they are a Pest
The female fly lays her eggs in a wide range of fruits. The eggs hatch into maggots that feed on the fruit as they develop, causing it to rot from the inside. They have a bacteria which breaks down the fruit making it easier for them to digest. Evidence of fruit having been stung is visible as small brown marks that may be raised lumps. They will lay eggs in virtually any fruit including apple, apricot, avocado, capsicum, cherry, citrus, custard apple, grape, guava, kiwifruit, mango nectarine, papaya, passionfruit, peach, pear, persimmon, plum, pomegranate, quince, poquat, tamarillo, tomato and probably every other tropical fruit.