• Animal Systematics, Evolution and Diversity
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• v.18 no.2
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• pp.271-276
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• 2002

From examination of caprellid specimens collected from south coast, Caprella Japonica is found and newly reported from Korea. We redescribe it in detail with figures which show a couple of differences as compared with the previous description from Japan.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.281-293
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• 2020

The Korean thistle (Cirsium setidens) is grown in Gangwon province as a food ingredient called gondre. Based on regular monitoring of Korean thistle cultivation, we detected local outbreaks of a stick insect causing severe damage. Here we report the identification of the stick insect and its ecological characteristics. The survey involved 3 farms located in Jeongeon-gun, Gangwon province and lasted from May 28 to October 1 in 2019. According to morphological and DNA analyses the stick insect was identified as Ramulus koreanus Kwon Ha and Lee. a member of the family Phasmatidae. Its outbreak in the Korean thistle farms was observed from June 11 to August 22 with peak density on July 23. Spatial distribution analyses, using Taylors power law and Greens index showed that R. koreanus was uniformally distributed. Food consumption rate of Korean thistle leaves was estimated as 60.98±4.35 ㎠/day/adult. The main food plants were identified as Juglans mandshurica and Aronia melanocarpa. Further study needs to pursue the mechanism of the outbreak and its possible impact on agricultural and forest ecosystems. Additionally, means to relieve crop damage need to be identified.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.2
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• pp.105-109
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• 2002

Seasonal variations of species composition and density of caprellids was accomplished in eelgrass beds around Daedo Island, a south coast of Korea. Sampling was performed monthly using an epifaunal sampler at two stations from June 1996 to May 1997, Caprellids were comprised of 6 species belong to a family Caprellidae, Mean density was 402 ind./$m^2$. The numerically-dominant species were Caprella tsugarensis (216 ind./$m^2$) and C. kroeyeri (129 ind./$m^2$). High density was occurred in the early summer, and lows in autumn and winter. The density of caprellids was correlated with the biomass of the eelgrass. Predation pressure by fish was also correlated with the density of caprellids in spring.

• Animal Systematics, Evolution and Diversity
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• v.12 no.4
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• pp.281-287
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• 1996

A new species of Caprellidae, Ca;rella multitberculum collected from 3 localities in the coast of the East Sea in Korea, is described and illustrated. This new species is very close to Caprella soyo Arimoto, 1934 from Japan, but is distinguished from it by having the more numerous small tubercles on body surface, the shorter flagellum of antenna 1 and the smaller appendages of abdomen. Moreover, the shape of propodus of gnathopod 2 reveals several prominent differences between the two.

• The Korean Journal of Zoology
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• v.36 no.3
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• pp.353-366
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• 1993

This study on Korean capreilids (Amphipoda, Capreiiidae) was based on the materlais collected from 23 locailties in the coast of the East Sea and the Ulrung Island. 17 species of genus Caprella were identified. Among them, 3 species are newly reported from Korea: Caprella cristibrachium Mayer, 1903, C. linearis (Linnaeus, 1767) and C. mixta Mayer, 1903. 6 species are new records from the East Sea: Caprella brevirostris Mayer, 1903, C. decipiens Mayer, 1890, C. equilibra Say, 1818, C. gigantochir Mayer, 1903, C. tsugarensis Utinomi, 1947 and C. verrucosa Boeck, 1872. As a result, Korean caprellid fauna consists of 5 genera, 30 species.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.409-410
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• 2020

This report describes the damage caused by gypsy moths (Lymantria dispar) and stick bugs (Ramulus mikado) to forests and host plants in 2020. Severe tree-crown defoliation was found in central parts of Korea, especially Gangwon (1,638 ha), Gyeonggi (1,134 ha), Chungbuk (726 ha) and Seoul (476 ha). Stick bug outbreaks occurred in hilly areas, such as Mt. Bongsan, located between Seoul and Goyang.

• Animal Systematics, Evolution and Diversity
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• no.nspc2
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• pp.97-106
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• 1988

Fifteen caprellid species in 5 genera were identifice during the study period from February to July , 1987 at 16 localites in Cheju Island and adjacent waters. Of which 5 species in 5 genera are newly reported from Korea ; Caprella kominatoensis Takeuchi, 1986. Protomima imittrix Mayer, 1903. Pseudoproto fallax Mayer, 1903, Paraprotella prima Mayer, 1903 and Protella gracilis Dana, 1853.

• Journal of Korean Society of Forest Science
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• v.112 no.1
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• pp.117-125
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• 2023

Outbreaks of Ramulus mikado (Insecta: Phasmatodea: Phasmatidae) in the hilly areas of Mt. Bongsan, Mt. Cheonggye, and elsewhere in Seoul and Gyeonggi occurred from 2020 to 2021, causing serious defoliation. We evaluated the insecticidal effects of six eco-friendly organic materials and the insect-pathogenic fungus Metarhizium anisopliae against R. mikado. The fungus was isolated from naturally dead bodies of R. mikado in forest ecosystems. The results revealed that three eco-friendly organic materials containing azadirachtin or geraniol as active ingredients showed high mortality in the range of 85.2%-100%, which were rates similar to that of the chemical insecticide fenitrothion emulsifiable concentrate. All R. mikado adults that were sprayed with a conidial suspension of M. anisopliae at different concentrations were killed within a few days. In conclusion, three eco-friendly organic materials and M. anisopliae could be good alternatives to chemical insecticides.

• Korean journal of applied entomology
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• v.61 no.3
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• pp.409-422
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• 2022

Two dominant thrips in hot pepper (Capsicum annuum) cultivating in greenhouses are Frankliniella occidentalis and F. intonsa in Korea. This study investigated their overwintering physiology. These two thrips were freeze-susceptible and suppressed the body freezing temperature by lowering supercooling point (SCP) down to -15~-27℃. However, these SCPs varied among species and developmental stages. SCPs of F. occidentalis were -25.7±0.5℃ for adults, -17.2±0.3℃ for pupae, and -15.0±0.4℃ for larvae. SCPs of F. intonsa were -24.0±1.0℃ for adults, -27.0±0.5℃ for pupae, -17.2±0.8℃ for larvae. Cold injuries of both species occurred at low temperature treatments above SCPs. Thrips mortality increased as the treatment temperature decreased and its exposure period increased. F. occidentalis exhibited higher cold tolerance than F. intonsa. In both species, adults were more cold-tolerant than larvae. Two thrips species exhibited a rapid cold hardening because a pre-exposure to 0℃ for 2 h significantly enhanced the cold tolerance to a lethal cold temperature treatment at -10℃ for 2 h. In addition, a sequential exposure of the thrips to decreasing temperatures made them to be acclimated to low temperatures. To investigate the overwintering sites of the two species, winter monitoring of the thrips was performed at the greenhouses. During winter season (November~February), adults of the two species were not captured in outside of the greenhouses. However, F. occidentalis adults were captured to the traps and observed in weeds within the greenhouses. F. occidentalis adults were also emerged from soil samples obtained from the greenhouses during the winter season. F. intonsa adults did not come out from the soil samples at November and December, but emerged from the soil samples obtained after January. To determine the adult emergence due to diapause development, two thrips species were reared under different photoperiods. Adult development occurred in all photoperiod treatments in F. occidentalis, but did not in F. intonsa especially under short periods. Tomato spotted wilt virus, which is transmitted by these two species, was detected in the weeds infested by the thrips during the winter season. These results suggest that F. occidentalis develops on weeds in the greenhouses while F. intonsa undergoes a diapause in the soil during winter.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2000.10b
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• pp.58-61
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• 2000

장미는 우리나라 5대 화훼작목 중의 하나로 농가의 주요소득원이다. 최근에는 장미재배온실의 대형화, 단지화와 함께 연중 절화를 생산하는 온실이 늘어남에 따라 횐가루병, 노균병, 총채벌레, 응애 등 각종 병해충 발생문제가 대두되고 있다. 특히 장미에서 문제되는 해충은 꽃노랑총채 벌레 (Frankliniella occidentalis), 점박이응애(Tetranychus urticae) 등으로 이들 해충은 발생초기에 발견이 어렵고 약제에 의한 방제효과가 낮으며 장미에 등록되어 있는 약제용 약제가 제한되어 있어 효과적인 방제가 이루어지지 못하고 있다. (중략)