The research was conducted at the Polish Akademii of Science Botanical Garden in Powsin on five cultivars of park roses (Frühlingsduft, Nevada, Marguerite Hilling, Poppius, Harison's Yellow) and one wild form (Rosa moyesii). The aim of this study was to evaluate the number of the most important pests such as spider mites (Tetranichidae), aphids (Aphidoidea) and rose leafhopper (Edwardsiana rosae L.) on rose leaves and to select the cultivar which is the most resistant to these pests. The observations were conducted in 2012-2013. Ten leaves were collected both from the upper and lower part of the shoot. In the laboratory conditions the pests were counted and symptoms of their feeding were observed. The largest number of pests, especially mites, was found on the cultivar Frühlingsduft rose. There were clear preferences in relation to cultivars in case of European red mite (Panonychus ulmi Koch), which showed in greater number only on the cultivar Frühlingsduft and in 2013 also Nevada, despite the possibility to move to other bushes. The least number of pests was generally observed on the cultivar Poppius. StreszczenieBadania prowadzono w Ogrodzie Botanicznym Polskiej Akademii Nauk w Powsinie, na pięciu odmianach róż parkowych (Frühlingsduft, Nevada, Marguerite Hilling, Poppius, Harison's Yellow) oraz jednej formie dziko rosnącej (Rosa moyesii). Celem badań było określenie liczebności najważniejszych szkodników: przędziorków (Tetranychidae), mszyc (Aphidoidea) i skoczka ró żanego (Edwardsiana rosae L.) na liściach róż oraz wybór odmiany najbardziej odpornej na wymienione fitofagi. Obserwacje prowadzono w latach 2012-2013. Do badań pobierano po 10 liści złożonych z górnej i dolnej części pędów z poszczególnych odmian. W laboratorium liczono szkodniki i obserwowano objawy ich żerowania. Największą liczebność szkodników, przede wszystkim przędziorków, stwierdzono na odmianie Frühlingsduft. Wyraźne preferencje w stosunku do tej odmiany wykazywał przędziorek owocowiec (Panonychus ulmi Koch), który w większej liczbie pojawił się tylko na odmianie Frühlingsduft, a w 2013 roku również na odmianie Nevada, pomimo możliwości przemieszczania się szkodnika na inne odmiany. Najmniejszą ogólną liczbę fitofagów obserwowano na odmianie Poppius.

The rose flea beetle, RFB (Luperomorpha xanthodera Fairmaire 1888) is a new flower pest in Europe. In 2012, it was brought accidentally to central Poland. To search for this introduced species in the area adjacent to the site of the first finding, 29 plant species belonging to five botanical families (Lamiaceae, Brassicaceae, Asteraceae, Plantaginaceae, Crassulaceae) were monitored over a 3-year-long study (2016−2018). RFB were found on 11 herbaceous/ ornamental plant species (Lamiaceae, Brassicaceae, Asteraceae) along with feeding damage to the flowers. White mustard (Sinapis alba L., Brassicaceae), hyssop (Hyssopus officinalis L.), and Monarda spp. (Lamiaceae) were its most preferred host plants. In each season, RFB females preferred host plants which bloomed abundantly and vividly. However, among the examined plant species there was a large variation in the year-to-year RFB abundance. Over the examined period the RFB extended its abundance exponentially, and its population survived and established itself in the area. The general sex ratio of the beetles was strongly female biased. In the female pool, females with conspicuously swollen abdomens predominated. The results of our study provide more insight into RFB behaviour, its establishment and spreading into new areas. To support the evidence for the RFB risk factor as an agricultural/ horticultural pest, further research should focus on the beetles' biology, reproductive tactics, larval host plant preference, larva-inflicted damage and harmfulness, the impact of the RFB on the native fauna, as well as its further local and distant migration propensity. Presently our knowledge about these aspects is still fragmentary.