Scientific name: Drosophila melanogaster Family: Drosophilidae Order: Diptera Risk level: Moderate Category: Flying pest
? What is the fruit fly
Scientific name: Drosophila melanogaster
Family: Drosophilidae
Order: Diptera
Risk level: Moderate
Category: Flying pest
The fruit fly (Drosophila melanogaster) is one of the most studied organisms in scientific history and has contributed to major advances in genetics and genomics. It is very small (2–4 mm) and has large, distinctive red eyes. It reproduces rapidly in ripe fruit, drains and alcoholic beverages. It is not the larger commercial fruit fly (Bactrocera), but is a pest in restaurants and beverage factories.
Life cycle of the fruit fly
It undergoes complete metamorphosis: egg, larva (three instars), pupa and adult. In suitable warm conditions, a generation takes 10–21 days. The female lays hundreds of eggs on suitable organic material.
Distribution of the fruit fly
It occurs in tropical and subtropical regions. In Saudi Arabia, the Gulf and Egypt, it is common in facilities associated with food, waste or decomposing organic material.
Damage and risks associated with the fruit fly
It contaminates drinks, alcoholic beverages and juices; causes significant nuisance in restaurants and bars; and may carry acetic-acid bacteria that spoil beverages.
Signs of a fruit fly infestation
Signs include flies in food or production areas, increasing counts in ILT traps, and larvae at breeding sites.
Where fruit flies are found
They occur around overripe fruit, drains blocked with organic matter, alcoholic beverage residue and leftovers, uncovered raw vinegar, and unclean kitchen drains.
Fruit fly control methods
Use ILTs with regular monitoring, outdoor ULV fogging, residual spraying on resting surfaces, treatment of breeding sources and air curtains at building entrances.
Fruit fly control products
Pyrethroids (deltamethrin and cypermethrin), spinosad in sensitive areas, and diflubenzuron at breeding sites.
Requirements for controlling fruit flies in food facilities
FSSC 22000 Version 7/BRCGS: flies are a high-priority pest in food facilities. Their presence in production areas is a Major Non-Conformance. An ILT system with monthly documentation is required.
A fact about the fruit fly
The fruit fly has contributed to six Nobel Prizes as an experimental model, including research leading to the discovery of key developmental genes (Hox genes) that control body development in all animals.
Frequently asked questions about the fruit fly
Q: How can I distinguish a fruit fly from a housefly?
A: The fruit fly (Drosophila melanogaster) is very small and has large red eyes. Careful visual examination of size, color and behavior can help distinguish the two.
Q: Are ILTs enough to control flies?
A: ILTs alone are for monitoring and do not provide complete control. They must be combined with treatment of breeding sources and environmental management