The members of genus Donacia are aquatic leaf beetles in the subfamily Donaciinae. Their larvae feed on submerged portions of aquatic plants and adults live on surface parts of the same plants. This genus includes 6 species belonging to 2 subgenera in the Korean Peninsula, of which there have been questions about the record of D. (Donacomima) japana. Chûjô and Goecke (1956) described a new species, D. japana, based on specimens collected in Japan and Korea (Unggi, Hamgyeongbuk-do), and Hayashi (2020) stated that records of this species from Korea and NE China may be misidentification of D. aquatica (Linnaeus, 1758). In this study, as a result of comparing specimens collected in South Korea (Gwangneung, Gyeonggi-do) with descriptions of D. japana, male genitalia (Hayashi, 2020) and gene sequences of COI region, we conclude that records of D. japana replace with D. aquatica in the Korean Peninsula, and D. japana is endemic to Japan.

고위험해충의 국내 유입 및 발생 여부를 조사하기 위한 예찰협력 네트워크 구성을 위해 7개 대학(경상대학교, 군산대학교, 서울대학교, 순천대학교, 안동대학교, 제주대학교, 충북대학교)이 참여하여 고위험해충 9종(Aceria diospyri, 오리엔탈과실파리(Bactrocera dorsalis), 일본과실 파리(Bactrocera minax), Bactrocera tsuneonis, 코드린나방(Cydia pomonella), 포도애기잎말이나방(Lobesia botrana), Proeulia sp., 붉은불개미 (Solenopsis invicta), Stephanitis takeyai)에 대한 예찰조사를 2018년 6월부터 10월까지 실시하였다. 전국을 7개 권역으로 구분한 뒤, 105개 지역 내 315개 지점에서 총 7,560개의 트랩운용/달관조사를 실시하였으며, 조사결과 A. diospyri, 오리엔탈과실파리, 일본과실파리, B. tsuneonis, C. pomonella, 포도애기잎말이나방, Proeulia sp., 붉은불개미, S. takeyai는 발견되지 않았다. 본 조사 연구를 통하여 고위험해충을 조기 탐지할 수 있는 전국단위의 감시체계를 구축하였으며, 국경 이후 외래침입해충들의 예찰조사를 위한 거점 지역을 확보하였다.

The unexpected introductions of exotic organisms between different countries are being accelerated by the global climate change and increasing international trade. Especially, many exotic insects cause serious economic losses and ecological disturbance in invaded areas. Since the uncertainty of potential impact, a priori conception has to be established for better emergency response. The risk assessment of national and foreign examples will be presented together with an evaluation of the current status.

Jumping plant-lice (Hemiptera: Psylloidea) are known for a few deleterious pest species worldwide, yet the phylogeny of the group has been poorly understood. The goal of researching the Korean Psylloidea is to achieve a total overview of the group. The systematic study relies on three main pillars which are i) the taxonomic review of superfamily Psylloidea in the Korean Peninsula, ii) the correction of taxonomic confusions caused by phenetic plasticity and iii) the molecular phylogeny of Psylloidea to elucidate the higher-level phylogenetic relationships among the families and subfamilies of the superfamily Psylloidea. Discussions of the early diversification and evolution of Psylloidea will be presented together with comments on biogeography and host plant association.

Pear psyllids belong to the most serious pests of pear. They damage pear trees by excessive removal of phloem sap, by soiling the fruits with honeydew which, in turn, provides a substrate for sooty mold, and by transmission of Candidatus Phytoplasma, the causal agents of the pear decline disease. The morphological similarity, the presence of seasonal dimorphism that affect adult colour, size and wing characters, and uncritical use of species names, led much confusion in the taxonomy of pear psyllid species. As a result, pear psyllids have been frequently misidentified. Here we analysed DNA barcodes of eleven pear psyllid species from eastern Asia, Europe and Iran using four mitochondrial gene fragments. The efficiency of identification was notably high and considerable barcoding gaps were observed in all markers. Our results confirm the synonymies of the seasonal forms. Previous misidentifications are also corrected. There is no evidence for the presence of European pear psyllid species in East Asia.

The movements of unwanted pests between different continents are being accelerated by the global climate change and ever-increasing international trades, which has also been facilitated by the recent increase of FTA and other trade agreements. Many invasive pests cause serious economic losses and ecological disturbance in invaded rural and natural areas. Since the uncertainty of potential impact of invasive pests, it would be extremely useful if the priority of invasive quarantine pests can be predicted for the efficient surveillance and eradication processes. We are initially analysed national and foreign examples to evaluate the current system of pest prioritization of national quarantine pests. Also here we suggests evaluation platforms for selecting high priority exotic pests.

Nomenclatural changes are provided for Sorbus-feeding Cacopsylla moiwasana (Kuwayama, 1908) species group. Thirteen Palaearctic Cacopsylla species have been recorded from Sorbus L. (Rosaceae), and of these, seven species restricted to East Asia. Among the East Asian species, four Japanese species, i.e. C. elegans Inoue, 2004, C. jezoensis (Miyatake, 1963), C. midoriae (Miyatake, 1963) and C. moiwasana (Kuwayama, 1908), assigned to C. moiwasana species group. Above the latter three species very similar to each other, allopatrically distributed, and all or some of them could be synonymous. The present investigation of the type material resulted in confirmation that Psylla jezoensis and P. midoriae should be treated as junior synonym of P. moiwasana. The following synonyms are proposed: Cacopsylla moiwasana (Kuwayama, 1908) = Psylla jezoensis Miyatake, 1963, syn. nov., Psylla midoriae Miyatake, 1963, syn. nov. The species are newly recorded from Korea.

The confused taxonomy of the east Palaearctic pear psyllids, serious pests on cultivated pear, is reviewed. Fifty-sixnominal species have been reported from Pyrus, 25 of which we consider valid and ten as not being associated withPyrus. Our taxonomic revision suggests that, in Korea, four Cacopsylla species develop on pear. Three species occuralso in Japan. New synonyms are suggested and seasonal dimorphism are critically discussed.Key words : Psyllidae, Cacopsylla, taxonomy, host plant, Pyrus, Rosaceae, Manchrian pear, Asian pear, European pear, China,Japan, South Korea, Russian Far East

The superfamily Psylloidea of Korean Peninsula is systematically revised. Systematic studies on the Psylloidea are conducted mainly three themes: (1) The taxonomic review of superfamily Psylloidea (Hemiptera: Sternorrhyncha) in the Korean Peninsula, (2) DNA barcoding for the correction of taxonomic confusions and confirmation of seasonal forms, and (3) molecular phylogeny of Psylloidea to elucidate higher group relationships and to test current controversial morphological classifications.

지금까지 한국산 다듬이벌레는 3개 아목(Trogiomorpha, Troctomorpha, Psocomorpha)의 7개 과에서 14종이 알려져 있다. 채집된 재료 를 바탕으로 동정을 실시한 결과, 2개 아목에 속하는 다음과 같은 10종을 추가한다: [Troctomorpha] Amphientomidae: Ancylentomus macrourus (Li, 1997); [Psocomorpha] Amphipsocidae: Amphipsocus japonicus (Enderlein, 1906), Caeciliusidae: Valenzuela oyamai (Enderlein, 1906), Paracaecilius japonicus (Enderlein, 1906), Stenopsocidae: Cubipilis aphidiformis (Enderlein, 1906), Stenopsocus immaculatus (Stephens, 1836), Peripsocidae: Peripsocus didymus Roesler, 1939, Psocidae: Amphigerontia anchorae Li, 2002, Psococerastis tokyoensis (Enderlein, 1906), Trichadenopsocus alternatus Li, 2002. 이 미기록종들에 대한 성충 및 진단형질의 사진을 제공하였다.

The jumping plant-lice of Laos are reviewed based on material collected during recent expeditions by the Seoul National University (2012−2015) and the Naturhistorisches Museum Basel (2003−2012). To date, only three psyllid species, viz. Diaphorina citri, Heteropsylla cubana and Pseudophacopteron tuberculatum, are recorded from Laos. In the material at hand, 22 species (of 6 families and 16 genera) are represented. This collection includes the three previously reported species and eight species reported for the first time from Laos. Eleven species are identified only to genus due to insufficient material.

Pear psyllids are of major economic concern in Korea. In the literature five nominal species, including two West Palaearctic taxa, are reported from the Peninsula. The Korean pear psyllids, member of the large genus Cacopsylla, are reviewed here to comprise four species. Previous Korean records of C. pyrisuga (Foerster) are misidentification of C. burckhardti Luo et al. whereas those of C. pyricola (Foerster) concern C. maculatili Li and probably C. jukyungi (Kwon) stat. rev., comb. nov. (from Psylla). The latter, that is commonly found in pear orchards, occurs also in Japan where it was misidentified as C. chinensis. The differences between C. jukyungi and C. cinereosignata syn. nov. reflect seasonal dimorphism. For this reason, we synonymise the two. C. maculatili and C. qiuzili Li are shown to represent the winter and the summer form of the same species and are, therefore, synonymised as C. maculatili = C. qiuzili syn. nov. C. jukyungi and C. sandolbaea (Park & Lee) are redescribed, a key to the adult of the four species and short biological notes are provided.

Four new species of the genus Cacopsylla Ossiannilsson are described and illustrated based on adults and fifth instar immatures. Cacopsylla spp. nov. are associated with Malus baccata (L.) Borkh. (Rosaceae), Crataegus pinnatifida Bunge (Rosaceae), Aralia elata (Miq.) Seem. (Araliaceae), Pittosporum tobira (Thunb.) W. T. Aiton (Pittosporaceae) respectively. Short biological notes are provided.

Psyllids are small sap sucking insects. Around 4,000 species are described worldwide. They show their greatest diversity in the tropical and south temperate zones. Several psyllid species are pest of crops such as citrus, pear, potato and tomato. They has been also responsible for extensive damage to ornamental trees. In this study, we report four psyllids species, new to Korea: Cacopsylla satsumensis (Kuwayama, 1908) on Raphiolepis indica (Rosaceae), Calophya nigridorsalis Kuwayama, 1908 on Rhus spp. (Anacardiaceae), Carsidara limbata Enderlein, 1926 on Firmiana simplex (Sterculiaceae) and Trioza machilicola Miyatake, 1968 on Machilus thunbergii (Lauraceae). All of them were found as large colonies, severely feeding on host plants, excreting sticky honeydew on which blackish sooty mold grows. Carsidara limbata secrete pale wax masses. Cacopsylla satsumensis cause leaf distortion and Trioza machilicola make galls underside of the leaves.

Three Cyamophila species are recognized from Korea, including a new species: Cyamophila hexastigma (Horváth, 1899), Cyamophila willieti (Wu, 1932), Cyamophila sp. nov. The new species differs from other allied species in the paramere bearing a characteristic innerly protruding apex. Cyamophila dalbergiae Li, 2011, in particular, it differs also in the wing venation with the vertically narrow rectangular cell cu1 and long and sinuous vein Rs whereas in Cyamophila dalbergiae cell cu1 is broad and vein Rs relatively short and straight. In Cyamophila sp. nov. the female circumanal ring is longer than in Cyamophila dalbergiae. All three species are described and illustrated, with a key to the Korean species.

Psyllids are a serious pests of pears cultivated in temperate and subtropical regions. Pear psyllids are a member of the large genus Cacopsylla (Psyllidae: Psyllinae). Among the 28 psyllid species that infect pear trees, Cacopsylla chinensis (Yang and Li, 1981) is considered the most harmful. Recently, we found new pear psyllid pest affected Korean pear (Pyrus pyrifolia var. culta) orchards. The psyllid is morphologically identical to C. chinensis and is herein reported as a new record. In this study, we conducted DNA sequence analysis of the mitochondrial cytochrome oxidase I-leucine tRNA-cytochrome oxidase II (COI-tRNALeu-COII) and 16S rDNA regions to demonstrate the phylogenetic relationships among C. chinensis from pear orchards in Korea, and those recorded from China, Taiwan and Japan. The sequence of the COI-tRNALeu-COII and 16s rDNA regions were equivalent from Korea. Comparison of nucleotide sequences and phylogenetic analysis differentiated Korean psyllids from the Chinese and Taiwanese C. chinensis, but Korean and Japanese psyllids were closely related. The results suggest that Korean and Japanese C. chinensis are genetically homologous. It is presumable that these individuals descended from a single colony that was probably introduced recently.