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Sanghyeok Nam,Min Suk Oh,Seunghyun Lee,Seunghwan Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.04
Halyomorpha halys(Stål, 1855) (Hemiptera: Pentatomidae), also known as Brown Marmorated Stink Bug (BMSB), is a recent invasive pest in America and Europe. It originated from East Asia such as Korea, Japan, China, and Taiwan. Genus Trissolcus (Hymenoptera: Scelionidae) which is regarded as important species for biological control of H. halys, was described 6 species previously in Korea. But biology and taxonomic character of this genus is poorly known in Korea. Herein, we report two species from Korea, T. japonicus Ashmead, 1904 and T. plautiae Watanabe, 1954. We have investigated the morphological characters and COI sequence, and conducted an experiment about parasitic preference on BMSB's egg. Morphological key and picture of two species, and result of sequence investigation and experiment will be presented.
A taxonomic review of the family Platygastridae (Hymenoptera: Platygastroidea) from Korea
Sanghyeok Nam,Seunghwan Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10
The family Platygastridae is a large group of parasitoid wasps, generally have a small body size (1-2mm). Platygastidae comprised of 5 subfamilies (Platygastrinae, Sceliotrachelinae, Scelioninae, Teleasinae, and Telenominae). Until know 6,049 species in 265 genera are reported around the world except polar regions and 96 species in 26 genera are reported from Korea. This study contains general information of Platygastrid wasps as a candidate of effective natural enemy, also provide high resolution photography to identify Korean Platygastid wasps at the genus levels.
Sanghyeok Nam,Gwan-Seok Lee,Seunghwan Lee 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
A ricanid planthopper, sometimes so called Ricania shantungensis, has been regarded as a serious invasive pest in Korean peninsula. It belongs to family Ricaniidae comprised of 40 genus and more than 400 species worldwide, and only 6 species recognized in Korea. The invasive planthopper has a wide host range including economic agricultural crops such as apple, peach and pear. In the meantime to investigate natural enemies for biological control, we have found an egg parasitoid. In this study, we report a new species of genus Phanuromyia, an egg parasitoid of the ricanid planthopper. Morphological characteristics of male and female are described in detail with high resolution images.
DNA Barcoding Korean Trissolcus Ashmead (Hymenoptera: Scelionidae) Species
Sanghyeok Nam,Seunghwan Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
Genus Trissolcus are considered as most effective natural enemy for control Pentatomid pests. Trissolcus japonicus (Ashmead) is native egg parasitoid of the brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) in Palearctic region. Nevertheless, identification of Palearctic Trissolcus species are still controversial because of morphological homogeneity such as Trissolcus semistriatus (Nees, 1834) and Trissolcus Kozlovi Ryakhovskii, 1975. This study reassessed Korean Trissolcus species diversity and provided DNA barcoding data using mitochondrial cytochrome c oxidase subunit I (COI) gene for 11 Korean Trissolcus species.
Two New Records of Genus Trissolcus Ashmead (Hymenoptera: Platygastridae) from South Korea
Sanghyeok Nam,Seunghwan Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.10
The genus Trissolcus Ashmead is an egg parasitoid of the family Pentatomidae, of which species are used for biocontrol agents for sting bug pests. Until now, 8 species of Trissolcus were recorded from South Korea. In this study, two species, Trissolcus plautiae (Watanabe) and T. elasmuchae (Watanabe, 1954), are newly recognized from Korean peninsula. Diagnosis, photographs and key to species are provided.
Sanghyeok Nam,Seunghwan Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.04
Genus Trimorus are egg parasitoids of Carabid beetles. They are comprised of two subgenus (Trimorus, Neotrimorus), Neotrimorus are composed of 3 species. One of them Trimorus (Neotrimorus) ferrari was described by Veenakumari & Rajmohana from the Andaman islands India, but only male is determined. For the first time, female Trimorus (Neotrimorus) ferrari Veenakumari & Rajmohana, 2013 is collected from Myanmar. Herein, description and photograph of female T. (Neotrimorus) ferrari are provided, also redescription and photograph of male are included.
( Jae Yoon Jeong ),( Young Seo Cho ),( Jae Gon Lee ),( Sanghyeok Lim ),( Tae Yeob Kim ),( Seong Woo Nam ),( Joo Hyun Sohn ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Sarcopenia and osteoporosis are frequent complications in patients with liver cirrhosis. The aim of this study was to investigate the prognostic impact of skeletal muscle mass and bone mineral density in these patients. Methods: We included retrospectively cirrhotic patients who underwent both computed tomography scans (CT) and hepatic venous pressure gradient (HVPG) measurement between December 2009 and March 2015. Single transverse CT image at the level of the third lumbar vertebra (L3) were used to evaluate skeletal muscle area, visceral and subcutaneous fat. The mean CT attenuation of the trabecular bone of the vertebral body in L4 (L4<sub>HU</sub>) was measured. Results: A total of 160 cirrhotic patients were enrolled. The mean age of the patients was 52.9 years with men predominating (n=116, 72.5%) and most of the cause was alcohol (62.5%). Forty-nine patients (30.6%) died during a median follow-up period of 39.6 months (range, 3.6-87.6). In multivariate analyses, HVPG (hazard ratio [HR] 1.069, 95% confidence interval [CI] 1.011-1.130; P=0.018), Model for End-Stage Liver Disease (MELD) scores (HR 1.081, 95% CI 1.014-1.153; P=0.018), presence of sarcopenia (HR 1.859, 95% CI 1.004- 3.443; P=0.049) and L4<sub>HU</sub> (HR 1.839 for L4<sub>HU</sub> < 145 HU, 95% CI 1.013-3.338; P=0.045) were independently associated with long term mortality. In patients with low MELD score (<10), HVPG (HR 1.161, 95% CI 1.040-1.296; P=0.008) and L4<sub>HU</sub> (HR 4.173 for L4<sub>HU</sub> < 145 HU, 95% CI 1.501-11.598; P=0.006) were independent predictors of mortality, but and presence of sarcopenia was not significant. Conclusions: Muscle mass and bone mineral density, together with the known MELD and HVPG, were associated with longterm prognosis in cirrhotic patients. Especially, in low MELD score, low bone mineral density was independently associated with long-term mortality. It is necessary to identify prognostic roles of liver-muscle-bone according to the degree of cirrhosis.