The invasive and predatory harlequin lady beetle, Harmonia axyridis, has been introduced as a biological control agent to many agricultural areas worldwide and has now spread from agricultural to natural habitats where it threatens native arthropod biodiversity. The aim of this study was to...

The occurrence of the exotic "granulate ambrosia beetle" Xylosandrus crassiusculus (Motschulsky) in Argentina and Uruguay is reported for the first time, documenting expansion in South America. Morphological characters are provided to allow distinction of this species from other similar ambrosia...

Background and purpose: The zigzag elm sawfly, Aproceros leucopoda (Hymenoptera), originating from Asia is being considered as one of the major pests of elm trees (Ulmus spp.) within Europe where it was first recorded in 2003. Recent investigations document the fast spread of this invasive species...

Successful establishment of invasive species requires that the species meet environmental conditions favouring their longevity and fecundity. When juveniles and adults consume different resources, gravid females may have to choose whether to feed or to reproduce. We used a successful invasive...

The bird cherry ermine moth, Yponomeuta evonymellus L., is considered an obligatory monophagous insect pest that feeds only on native European Prunus padus L. In recent years, however, increased larval feeding on alien P. serotina Ehrh. has been observed. In both species, general defoliation is...

Traps baited with a sex attractant were used to determine if the invasive noctuid moth Hecatera dysodea (Denis & Schiffermuller, 1775) is generally distributed in the state of Idaho. The insect, which originated from Europe, utilizes species of Lactuca (lettuce) (Asteraceae) as a larval host....

An illustrated identification key is provided to 17 species of Thysanoptera: Phlaeothripinae from Hawaii that are members of the Tribe Haplothripini, together with a further species that is similar in general appearance to members of that Tribe. Of these 18 species, 13 are considered introduced...

The knowledge of the endemic drosophilid assemblage is a useful reference to study population dynamics when new species are introduced in a geographical area. The introduction of invasive species can change the structure of the drosophilid community; hence, the distribution data for endemic species ...

The plum seed wasp, Eurytoma schreineri Schr. (Schreiner, 1908) is non-native species insect for Bulgarian fauna. This species was first recorded in Bulgaria in 2013, in the regions Dobrich and Silistra, in the northeastern part of the country. E. schreineri is oligophagous. The larva feeds in the...

The worldwide trade of agricultural products and high levels of disturbance and fertilisation make arable lands particularly vulnerable to biological invasions. Clearing for the development of arable land has been an unprecedented event that created a new and more homogeneous habitat which allowed...