Most species of Drosophila are nuisance pests, attracted to overripe fruits, on which females lay their eggs. Drosophila
The larvae hatch and feed on the inside of the fruit causing the fruit to be unsuitable for market. Larvae are tiny, cylindrical and white maggots with black mouthparts. They can be found feeding inside the fruit. Pupation occurs anywhere on the inside or outside of the fruit, and development time to adult varies with prevailing temperature conditions.
Females can lay more than 25 eggs per day and can have up to 13 generations per year. This leads to a large increase in the population during the crop-ripening season, peaking towards the end of the season. The adults appear to be able to disperse easily, as evidenced by the rapid spread of SWD in North America and Europe.
Please see “Identification” section, which includes pictures, an ID card and a dichotomous key for help identifying Drosophila
If you are looking for additional resources then you can visit the websites below or download the following booklet: Guide to Drosophila
Websites for more information on biology and identification of SWD:
Source: Asplen et al. (2015) Invasion biology of spotted wing Drosophila (Drosophila