engleski

Overwintering dynamics of the Mediterranean fruit fly in Central Dalmatia of Croatia

The Mediterranean fruit fly, Ceratitis capitata (Diptera: Tephritidae), is a polyphagous species that has recently expanded its range in Central Europe. However, the overwintering capacity of the medfly stages in those areas remained unexplored. In the frameworks of the HORIZON 2020 ‘818184 FF-IPM’ project, we assessed the overwintering capacity of adults and pupae in three overwintering sites (open field, storehouse in field, and basement in urban area) in Split (Dalmatia region, Croatia) during the winter period 2019-2020. For this purpose, we used wild flies from Split population. Ten cages with adults (0-1 day old) (5 ♂♂ and 5 ♀♀/cage) were transferred into the three sites at three dates (30/10/2019, 19/11/2019, 18/12/2019). Adult mortality was recorded every 2-3 days. In case of pupae, ten bottles with 2-5 day old pupae (20- 40 pupae/bottle) were placed in the three overwintering sites at 28/10/2019, 6/11/2019 and 5/12/2019. Pupal survival and adult emergence rates were recorded every 2-3 days. Newly emerged adults were transferred in pairs into demographic cages and kept at the same overwintering sites. Adult survival and female oviposition were recorded daily. Our results revealed that a) a few adults from the basement in urban area remained alive until the end of spring, while no adults from storehouse in field survived during spring. Adults from open field died until the end of March, b) adult emergence of overwintering pupae concluded in the middle of January, and c) females emerged of overwintering pupae remained alive until the early of August.

Adult Emergence - Ceratitis capitata - Invasion - Survival - Winter

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