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Flight Characteristics of Bactrocera dorsalis Associated with Long-Distance Migration
Naoya Hidaka1, Kohei Nishiya1, Yudai Masuoka2
1Institute for Plant Protection, National Agriculture and Food Research Organization, Koshi 861-1192, Kumamoto, Japan.
Insects
|February 27, 2026
Summary
The oriental fruit fly (Bactrocera dorsalis) can fly for over 7 hours, suggesting long-distance migration potential. Understanding its flight behavior is crucial for predicting its arrival and protecting agriculture.
Area of Science:
- Entomology
- Agricultural Science
- Ecology
Background:
- The oriental fruit fly (Bactrocera dorsalis) has reappeared in Japan, raising concerns about its migration.
- Its capacity for long-distance flight is poorly understood, despite potential agricultural risks.
Purpose of the Study:
- To investigate the flight characteristics of Bactrocera dorsalis.
- To inform the development of a migration prediction model for early warning systems.
Main Methods:
- Conducted outdoor flight observations and flight mill experiments under varying temperatures.
- Utilized first-generation adults from larvae collected in Taiwan.
Main Results:
- Bactrocera dorsalis initiates flight around 10:00 and sunset.
- Flight activity ceased below 16.2-16.5 °C.
- Some individuals sustained flight for over 7 hours.
Conclusions:
- Bactrocera dorsalis exhibits flight capabilities suggesting potential for long-distance migration.
- Findings are essential for developing predictive models and understanding migration behavior.
