Abstract
In recent years, a new alien species, Rhagoletis batava, a potentially important pest of the cultivated sea buckthorn, has been observed in Belarus, Latvia and Lithuania. In Lithuania, the distribution of fruit-feeding tephritid flies was insufficiently studied and more comprehensive studies were needed. The aim of this study was to obtain new data on the fruit fly distribution in the north-eastern part of Lithuania, with the focus on Rhagoletis batava, a newly arrived species in the Baltic countries. The flies were observed on their host plants in parks, greeneries and plantations in north-eastern Lithuania during a two-day period in August 2013. In total, three species of fruit-feeding flies were recorded: Anomoia purmunda, Rhagoletis alternata and Rhagoletis batava; A. purmunda was the most widespread. During the data collection, the alien species black locust gall midge, Obolodiplosis robiniae was also observed. O. robiniae is a new species for Lithuania and its only known host plant is Robinia pseuda...
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