Solenopsis invicta, known as the red imported fire ant, is an insect native to South America. This species was unintentionally introduced into Australia, New Zealand, several Asian countries, Caribbean countries, and the United States. It shows a high survival rate and settlement potential in human-habitable and non-living areas such as tropical rainforests, disturbed areas, deserts, grasslands, and roads. In Korea, invasions of red fire ants have been reported every year since 2017, and two invasions were discovered in 2023. Quarantine agency analyzing the haplotype and colony social type of S. invicta for surveillance and control. Population genetic analysis using Microsatellite Alleleic data of 66 loci to trace the origin of the invasion. Through research cooperation with the United States Department of Agriculture (USDA), we have received samples and expanded our genetic information database. This study analyzed genetic differences between 15 invasive populations and 44 reference groups. As a result of microsatellite analysis, the domestic invasive population showed a genetic structure similar to those in Guangzhou, China, and Florida, USA.

The lantern fly, Lycorma delicatula (White), was firstly introduced at least around ten years ago in the Korean Peninsula, and is now distributed throughout the mainland. We collected 37 L. delicatula isolates, totally 762 individuals from various locations in Korea, China, and Japan. Our results, based on molecular comparison showed multiple introductions of L. delicatula into Korea from China as followed; 1) The population which was spreaded and prevalent in a wide area after 2008 was identical to that of Shanghi, suggesting that main routes was the seedlings of Ailanthus altissima imported a few times from Shanghi into Incheon port in 2004~2005. 2) The populations in Changwon and Samcheok collected in 2011 were from Beijing and Tianjin, respectively. 3) The population in Cheonan collected in 2006 was different from other populations.

The invasive black soldier fly, Hermetia illucens, has been paid much attention as an excellent organic matter decomposer. We conducted the nationwide survey and the population genetic study using a mitochondrial cytochrome C oxidase 1 gene to understand its genetic diversity and distribution pattern in Korea. The results show that it has successfully settled down in South Korea and there are only 10 haplotypes and the populations of the insect are highly differentiated. The results indicate that only few maternal lineages were introduced and their dispersal was restrained due to their short distance flying tendency since their introduction.