A claimed bioterrorist attack using Mediterranean fruit flies prompted California to end its decade-long Malathion aerial spraying program in 1989.
Key Facts
- Year of invasion
- 1989
- Pest species
- Ceratitis capitata (Mediterranean fruit fly)
- Responsible group
- "The Breeders" (identity never confirmed)
- Stated motive
- Retaliation for state Malathion aerial spraying
- Program ended
- Decade-long Malathion program halted after 3 months
Location
Cause → Event → Consequence
California had conducted a decade-long Malathion aerial spraying program to combat destructive insects, which drew opposition from environmental advocates. A person or group calling itself "The Breeders" claimed to have deliberately released Mediterranean fruit flies as financial retaliation for the environmental damage caused by that spraying program.
In 1989, a sudden and dense infestation of Mediterranean fruit flies appeared across California, devastating crops. Scientists described the appearance as defying logic and suspected outside intervention. "The Breeders" claimed responsibility for the bioterrorist release, though the group's members were never identified.
Three months after "The Breeders" announced the medfly release, California ended its decade-long Malathion aerial spraying program and began seeking alternative methods for managing destructive insect populations. The incident raised concerns about agricultural bioterrorism and the vulnerability of crop systems to deliberate pest introductions.