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A review of the Korean pear psyllids (Hemiptera: Psyllidae)
Geonho Cho,Hiromitsu Inoue,Daniel Burckhardt,Seunghwan Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.04
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.
Systematics of the east Palaearctic pear psyllids (Hemiptera: Psylloidea: Psyllidae)
Geonho Cho,Daniel Burckhardt,Hiromitsu Inoue,Xinyu Luo,Seunghwan Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10
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
Four Psyllids (Hemiptera: Sternorrhyncha: Psylloidea), new to Korea
Geonho Cho,Seunghwan Lee 한국응용곤충학회 2015 한국응용곤충학회 학술대회논문집 Vol.2015 No.04
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.
Geonho Cho,Hiromitsu Inoue,Seunghwan Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
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.
Geonho Cho,Seunghwan Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.04
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.
DNA barcoding of pear psyllids (Hemiptera: Psylloidea: Psyllidae)
Geonho Cho,Igor Malenovský,Daniel Burckhardt,Hiromitsu Inoue,Seunghwan Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10
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.
Current status and example of risk assessment for exotic insects
Geonho Cho,Seunghwan Lee 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
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.