The lime leafminer Phyllonorycter issikii in Western Siberia: Some ecological characteristics of the population of the recent invader

The detection of the lime leafminer Phyllonorycter issikii in Novosibirsk in 2008–2009 is reported. Mines of this pest have been found on the small-leaved lime Tilia cordata and the Siberian lime T. sibirica, but not on the Amur lime T. amurensis (common host plant of moth). Leaves of T. cordata carried 2–3 times more mines than T. sibirica. On both host plants, the parasitism of mature larvae and pupae did not exceed 7%. Lack of control by local parasitoids can give the pest an opportunity to increase population density and spread further in Western Siberia.