| Abstract [eng] |
The aim of this study was to learn about the biology and diversity of currant aphids in Lithuania. 14 currant aphid species have been recorded in Lithuania (Rakauskas, Rupais, Juronis, 1992). For this study aphids were collected in Vilnius and Kretinga districts and on Curonian spit in 2003-2005. Currant aphid collection stored at the Department of Zoology, Vilnius University, was also analyzed. In 2003-2005 10 species of currant aphids were found in Lithuania, new collection sites of Cryptomyzus alboapicalis were detected and three new to Lithuania aphid species: Aphis lamiorum, Hyperomyzus lampsanae and Cryptomyzus ulmeri were found. 13 currant aphid species are stored at the collection of Department of Zoology, Vilnius University. Eriosoma grossularia was found after checking the collection material with a new Daniellson’s identification key to genus Eriosoma. More collection sites of Hyperomyzus pallidus, Cryptomyzus korschelti and Nasonovia ribisnigri were detected. Cryptomyzus stachydis from Stachys silvatica and Galeopsis sp. was registered in Lithuania for the first time. Cryptomyzus maudamanti and Cryptomyzus galeopsidis are two morphologically very similar species, and in some cases it is difficult to identify them correctly. Cryptomyzus maudamanti was not found in Lithuania during this study period. Canonical discriminant function offered in the identification keys (Guldemond 1991a; Heie 1994) proved to be not reliable to discriminate between C. galeopsidis and C. maudamanti (Table 17, 18). Using collection material from Institute of Entomology, Czech Academy of Sciences, discriminant analysis was performed, and canonical discriminant function, suitable for samples collected in Lithuania, was derived (Table 19). |
