Orientus ishidae (Matsumura, 1902) (Hemiptera: Cicadellidae), known as the mosaic leafhopper, is an invasive alien species native to the Eastern Palaearctic, but also widespread and well established on the eastern territory of North America. Since its first detection in Europe in 1998, this polyphagous species has expanded its distribution area and rapidly spread through central and western European countries, inhabiting a wide range of broadleaf trees and shrubs (e.g. Gleditsia triacanthos, Salix spp., Corylus spp., Acer spp., Betula spp., Populus spp. and Carpinus spp.), which are usually present in the surrounding of vineyards. Over the last decade, O. ishidae was frequently found within European vineyards and was proven to be able to complete its life cycle on grapevine. Moreover, this leafhopper was shown to be naturally infected with the Flavescence dorée phytoplasma (FDp), a devastating disease which causes significant economic losses in the major vine-producing countries. This study provides data on the occurrence of O. ishidae in Serbia, clearly confirming that it has expanded its distribution range to the Balkan Peninsula which could lead to establishment of new FDp epidemiological cycles inside the local vineyard regions. As a consequence, there could be an increased negative impact on phytosanitary situation with a continual spread of this vector species and FDp epidemic outbreaks in Southeastern Europe.

The Vermetidae is a family of sessile marine gastropods whose members are difficult to identify accurately, but one species, Eualetes tulipa is widely documented as an introduced species globally. In Asia, there is only one known record of this species from India to date. We report the presence of E. tulipa in Singapore based on DNA barcoding. This is the second known record from Asia and the first confirmation of a non-native vermetid for Southeast Asia.

The red imported fire ant, Solenopsis invicta Buren, is one of the most damaging pest species in the world. A native to the floodplains of subtropical South America, it has been spread to North America and more recently to Australia and Asia. In order to effectively control, manage, and mitigate its impact and spread, it is critical to understand its current distribution. While S. invicta has long been known from the smaller Caribbean islands, it has not been documented from the two largest islands (Hispaniola and Cuba). We present the first record of S. invicta from Hispaniola and discuss its presence in relation to its native congener, S. geminata.

Invasive aquatic plants can spread rapidly causing many negative effects on both the structure and functioning of aquatic ecosystems. They can also hinder navigation, fishing, water tourism, and recreation. Early detection and rapid response to invasive aquatic plants can prevent their further spread and negative impacts. In this study, we present the first record of two invasive alien aquatic plants Limnobium laevigatum and Pontederia crassipes in Poland. The plants were found in an artificial pond in the eastern part of the city of Kraków, southern Poland, on 16 September 2020. The pond was also occupied by Pistia stratiotes, another invasive alien aquatic plant that has been recently recorded in Poland. The locality is mapped using the ATPOL cartogram method, photographic documentation of the habitat and species is provided and the status of L. laevigatum and P. crassipes in the Polish flora is discussed.