Insect guide > Flies > Little Fruit Flies

Little Fruit Flies

Little Fruit Flies(Family Drosophilidae.)
This group includes the little fruit flies, or pomace flies, so commonly seen about decaying fruit and also about other decaying vegetation. They are frequently found in houses in the autumn about dishes containing pears, peaches and grapes. They are attracted to fruit both for food and as places for oviposition, since heir larva live in decaying vegetable matter.

They are also called "vinegar flies", from the fact that their white, slender larvae are frequently found in canned fruits and pickles which have been imperfectly sealed, occurring mostly near the top of the jars, but living without inconvenience in the briny or vinegary liquid, and transforming within brown puparia around the edges of the jar.

Drosophila ampelophila seems to be the commonest species all over the United States, and is mainly responsible for the injury to canned fruits and pickles. Drosophilas are found commonly around the refuse of cider mills and fermenting vats of grape pomace. Forbes has stated that they damaged the grape crop at Moline. They attacked most frequently the grapes which had been mutilated by birds or damaged by rot, but, having once commenced on a cluster, they passed from one berry to another, the flies meanwhile constantly laying eggs.

A brood of these flies may develop in twenty days.

The larva of Scaptomyza flaveola (Meig.) makes blotch mines in the leaves of radishes.