Fruit Flies

Behavior and Habitat

Fruit flies are usually carried on fruits and vegetables. They are also called vinegar flies since they often infest facilities producing vinegar. Fruit flies lay their eggs near the surface of fermenting foods or other moist organic materials. Upon emerging, the tiny larvae continue to feed near the surface of the fermenting mass. This surface-feeding characteristic of the larvae is significant in that damaged or over-ripened portions of fruits and vegetables can be cut away without having to discard the remainder for fear of retaining any developing larvae. In some cases, fruit fly infestations may occur in sink or tub drains where a large buildup of organic material has occurred and moisture levels are suitable for fly development. Fruit flies are common in homes, restaurants, supermarkets, and anywhere else food is served. Tomatoes, melons, squash, grapes, and other perishable items brought in from the garden are often the cause of an infestation developing indoors. Fruit flies are also attracted to rotting bananas, potatoes, onions, and other non-refrigerated produce purchased at the grocery store. It is common to see infestations in dumpsters.