engleski

The development of Drosophilid species (Diptera, Drosophilidae) in different strawberry cultivars

Drosophilids were not considered to be agricultural pests as they develop in overripe and fermented fruits. With the arrival of invasive species of Drosophila suzukii (Matsamura, 1931) in Europe the status of drosophilids was changed as the species is able to develop in healthy, unwounded and ripening fruits causing economic losses in production of softskinned fruits. The first economic damages from D. suzukii in Croatia where observed in production of fresh market strawberry. The aim of this study was to determine which species of drosophilids can develop in strawberry fruits. The samples of fruits of three strawberry cultivars (‘Albion’, ‘Portola’ and ‘San Andreas’) were collected during the harvest season of 2016 at greenhouse cultivation farm near Zagreb (N 45° 41′ 24″, E 16° 24′ 0″). From each cultivar 50 samples of fully ripened fruit were randomly selected and placed into the chamber for insect development to a specific temperature and humidity regime. After development of flies, three drosophilid species: Drosophila immigrans Sturtevant, 1921 ; Drosophila simulans Sturtevant, 1919 and D. suzukii were identified. An analysis of variance showed statistically more drosophilids in cultivar ‘Albion’ compared to the other two cultivars. It was concluded that species D. immigrans and D. simulans can also develop in strawberries and damage the fruits if the fruit is primarily damaged by D. suzukii and also that drosophilids prefer the cultivar ‘Albion’ for development.

drosophilid flies, Fragaria × ananassa Duchesne, production, damages

nije evidentirano