Rhagoletis cerasi
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Rhagoletis cerasi (Linnaeus) - (European cherry fruit fly)
The fruit fly attacks cherry fruits in Europe and temperate Asia. It is believed to be native to western Asia, but is now found in almost all European countries. In 2016, R. cerasi was found in eastern Canada and in 2017 in New York State.
Larvae feed on the cherry fruits, causing direct damage as well as decay due to secondary fungal infections. In many cases there is zero tolerance to infestations and processing factories may reject the fruits from the whole orchard after discovering one infested fruit.
Adult flies can be monitored with yellow stick traps. Management involves spraying with insecticide-treated baits as well as direct protection of the developing fruits with pyrethroids.
| Vernacular names | |
|---|---|
| • Deutsch: | Kirschfruchtfliege. |
| • English: | European cherry fruit fly |
| • Español: | mosca de las cerezas |
| • Français: | mouche de la cerise |
R. cerasi has one generation per year. The adult flies emerge in spring and lay their eggs into the developing cherry fruits when these change colour from green to yellow. The development from egg to pupa lasts around 2 months. The mature larvae leave the fruits during the summer and pupate in the ground where they overwinter in a diapause stage.
The adult is 4-5 mm long and dark brown to black with a whitish scutellum, yellowish marks on the thorax, and yellow tibiae and tarsi. The wings are hyaline with a pattern of black bands. Characteristic is the accessory costal crossband on the front edge in the middle of the wing as well as the pattern at the wing tip. These characters can be used for distinguishing R. cerasi from Rhagoletis cingulata which is similar in appearance and biology.
- Other images of Rhagoletis cerasi (Wikimedia Commons and Hortipendium - click to enlarge)
larva in cherry
pupae
