New facts about distribution and host spectrum of the invasive nearctic conifer pest, Leptoglossus occidentalis (Heteroptera: Coreidae) in south-western Slovakia.
In the summer 2007, the alien coreid bug Leptoglossus occidentalis Heidemann, 1910 was observed in the Arboretum Mlyňany SAS. This important seed feeder of coniferous trees native to North America was detected on immature cones of Pinus × schwerinii. During the summer 2008, an occurrence of the western conifer seed bug was studied in collections of conifers in the arboretum as well as in parks and public greenery of several settlements in southwestern Slovakia. The seed bug was recorded on 11 pine species (Pinus × schwerinii, P. strobus, P. ponderosa, P. sylvestris, P. nigra, P. mugo, P. flexilis, P. griffithii, P. armandii, P. densiflora and P. rigida), 5 spruce species (Picea abies, P. orientalis, P. engelmanii, P. wilsonii, and P. asperata), on California incense cedar (Calocedrus decurrens) and on Douglas fir (Pseudotsuga menziesii). An appearance of natural enemies was studied on collected seed bugs and one individual was found infected with entomopathogenic fungus Paecilomyces fumosoroseus. This is the first record of natural infection of L. occidentalis by this fungus.