Phyllonorycter medicaginella Gerasimov, 1930 (Lepidoptera, Gracillariidae), a new species in the entomofauna in Yugoslavia
1999
Dimic, N. | Peric, P. | Magud, B. (Institut za zastitu bilja i zivotnu sredinu, Beograd (Yugoslavia))
In mid - June 1995, high population density of one Phyllonorycter species on lucerne was registered in the locality of Konjarnik (Belgrade), Serbia (Yugoslavia). On the basis of the appearance and structure of male genital armature, this species was identified as Phyllonorycter medicaginella. Ecloded imagoes were isolated on ten chosen leaf clusters of lucerne. Since then, the research of the newly-determined species has started. The very same year, the species was proved also in Zemun, and later on, also in other localities of the wide region of Belgrade. The moths belonging to the species of the genus Phyllonorycter (Lithocolletis), which inhabit lucerne, are very much alike. Due to this, over 40% of the material in the most of scientific collections was wrongly determined. The identification of them depends only on the structure of male genital armature. During the previous four years, the researches proved that Phyllonorycter medicaginella in Yugoslav conditions has got six to seven generations. This in total opposition to the previous findings, according to which this species has got two generations. In the same way, the data on plant sustainer are problematic. Literature data on plant sustainer could no be confirmed by our investigations (neither found in nature, nor inhabited ed by force on the plants in pots). Phyllonorycter medicaginella causes characteristics tent-like mines on the underside of lucerne leaves. Very rarely (approximately 1/1000) the tent-like mines occur on the upper side of lucerne leaf, from which most often moths do not occur.
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