• The Korean Journal of Ecology
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• v.8 no.2
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• pp.75-79
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• 1985

330 House-Mice (Rattus norvegicus; 288, Rattus rattus; 42) were captured in surveyed areas (Downtown Seoul, Yeom-gok dong, and Sung-nam city) from May 1st, 1983 to April 30, 1984. Total 6170 of their Mites were collected from the above-indicated House-Mice. The survey on the number of species, the average individual number, preference of host, infection rate, and monthly abundance of Mites reached the following results. Seven species of Mites in Rattus norvegicus, and 5 species of Mites in Rattus rattus were respectively found. Accordingly whole Mites were found in 4 families, 6 genera, 9 species including unrecorded Hirstionysssus apodemi and Roadfordia ensifera. The most common species among Mites were Laelaps nuttalli (70.6). In aspect of the average individualnumber of Mites by host, 19.9% of Rattus norvegicus is more excessive than 10.2% of Rattus rattus. Eulaelaps stabularis, Androlaelaps glasgowi, Hirstionys년 apodemi were shown in preference of host in Rattus norvegicus, while Laelaps jettmari and Rodfordia ensifera in Rattus rattus. Rattus norvegicus was much infected by Laelaps nuttalli, while Rattus rattus by Laelaps echidninus. The seasonal development of it in Rattus norvegicus and Rattus rattus was at peak in July and in September. And Ornithonyssu bacoti was at peak in June, while Laelaps echidninus and Laelaps nuttalli in July.

• Korean journal of applied entomology
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• v.15 no.4 s.29
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• pp.179-184
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• 1976

Laboratory experiments were conducted to clarity the early-spline host·selectivity by the small brown planthopper(SBPH), Laodelphax striatellus Fallen, and green rice Leafhopper(GLH), Nephotettix cincticeps Uhle., on the bailey (the variety Suweon #18) and water foxtail (Alopeculus aequadis Sosbol). The host selectivity was evaluated on the bases of feeding and ovipositional perferences of the insects on the plants and their biological effects on the plants. The nymphs of SBPH much more preferred barley for feeding than water forxtail, while the nymphs of GLH relatively prefered water foxtail. There was no significant difference in ovipositional preference by SBPH among the test plants, and ovipositional preference by GLH Ivas significantly lower on barley and water foxtail than on rice. Nymphal growth an4 adult emergence of SBPH were significantly faster and higher on barley than on water foxtail. No adult emergence of GLH was observed on barley, and adult emergence was still quite lower even on water foxtail. The adult of SBPH fed on barley showed longer longevity aad higher fecundity than that of SBPH from water foxtail and rice. The adult GLH fed ell water foxtail shorted relatively shorter longevity and to)ver fecundity than that of GLH on rice. In conculsion, barley seems to be more adequate for spring host of SBPH than water foxtail, but barley may not be quite adequate for spring host of GLH. At presont moment, GLH seems rather to primarily select the water foxtail than barley as a spring host, even if the water foxtail is not so adequate for development of GLH.

• Korean journal of applied entomology
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• v.32 no.3
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• pp.338-347
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• 1993

The study was to investigate the bionomics, host plants, and oviposition preference of Hishimonus sellatus Uhler. It has 5 generations under natural conditions and the peak of the 3rd generation was observed about mid and late August. Its average developmental durations were 80 days in spring, 69 days in summer, and 77.8 days in autumn. The lengths of each stage were 0.8mm in eggs, 0.9mm in 1st instar, 1.4mm in 2nd instar, 2.1mm in 3rd instar, 2.5mm in 4th instar, 3.2mm in 5th instar, 4.1mm in female, and 3.8mm in male. Hishimonus sellatus overwintered as egg in Morus alba, Humulus japonicus, and Zizyphus jujuba begining mid October, and attacked the shoot of M. alba and H. japonicus about mid and late May, migrated to the Zizyphus jujuba from late June to early July. Female oviposites 32~62 eggs into epidermis of shoot, vagina and vein during their life. The preferred host plants of H. sellatus were Humulus japonicus, Morus alba, Zizyphus jujuba, and ligustrum obtusifolium. Highly preferable oviposition site was H. japonicus, M. albal, Z. jujuba, and L. obtusifolium, etc. On audlt longevity, the host plants as H. japonicus, M. alba, and Z. jujuba were 43$\pm$2 days and A. brevipedenculata, C. mimosoides, L. obtusifolium, V. rosa, A. sinicus and, A. graveolens were more than 25 days, and other host plants were less than 20 days.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.11a
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• pp.72-72
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• 2001

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.112.2-112
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• 1997

No Abstract, See Full Text

• Korea Trade Review
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• v.46 no.2
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• pp.177-191
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• 2021

Based on the existing OFDI (outward foreign direct investment) literature, this study endeavored to verify how the corruption of host countries affects the partner strategy of EMNEs (emerging multinational enterprises) when EMNEs enter global markets through joint ventures. Following the existing literature, this study classified corruption and partner strategies into two categories, respectively. First, the corruption of host country was divided into grand corruption and petty corruption. Second, EMNEs' joint venture partner strategy was divided into home country partner joint venture and host country (i.e., local) partner joint venture. Our hypothesis suggested that the greater the host country's grand corruption, the more EMNEs would choose the host country partner, while the strong petty corruption leads to the preference of home country partner in host country. The hypotheses were verified with a sample of 890 foreign direct investment cases of Chinese multinational companies from 2005 to 2015. As a result of the study, regardless of the degree of corruption, it was found that they prefer joint ventures with home country partners when EMNEs enter the global market through joint ventures.

• Analytical Science and Technology
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• v.16 no.4
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• pp.333-338
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• 2003

Inclusion selectivity of a three-dimensional piperazine-ligated cyanocadmate host complex, $[Cd_x(CN)_{2x}\{HN(CH_2CH_2)_2NH\}_y]{\cdot}zG$, has been investigated for benzene (B), toluene (T), ethylbenzene (E), o- (O), m- (M), and p-xylene (P) isomers as the aromatic guest molecules. From the binary, ternary and quarternary guest mixtures of E and xylene isomer (X), the order of inclusion selectivity in the host complex is O>E>P>M. From the binary to quinary BTX mixtures, the order of preference in the complex is seen to be B>T>O${\gg}$P>M.

• Mycobiology
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• v.50 no.2
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• pp.104-109
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• 2022

Fungi of the genus Tuber are ectomycorrhizal fungi that form a symbiotic relationship mainly with oak and hazel trees. Tuber spp. exhibit a highly selective host plant preference; thus, for cultivation purposes it is important to select an appropriate host plant for successful mycorrhization. In addition, as mycorrhizal characteristics differ according to Tuber spp., it is necessary to understand the differences in mycorrhizae according to the fungal species. Tuber huidongense and Tuber himalayense were recently discovered in Korea; therefore, we used spore suspensions from these two species to inoculate two species of oak trees, Quercus acutissima and Quercus dentata, to compare colonization rates and morphologies of the mycorrhizae. The colonization rates demonstrated that the different Tuber spp. favored different host plant species. In addition, unique morphological and anatomical characteristics were observed for T. huidongense and T. himalayense depending on the host species. These findings can lead to new economically important agricultural activities related to truffle cultivation in Korea.

• Proceedings of the Zoological Society Korea Conference
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• 1998.04a
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• pp.50.2-50
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• 1998

No Abstract, See Full Text

• Korean journal of applied entomology
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• v.51 no.1
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• pp.33-37
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• 2012

This study was conducted to investigate food preference and developmental characteristics of the gray field slug, $Deroceras$ $reticulatum$ M$\ddot{u}$ller (Stylommatophora: Limacidae) using various foods. The food preference of $D.$ $reticulatum$ was most highest on Chinese cabbage ($Brassica$ $campestris$ L., followed on cucumber ($Cucumis$ $sativus$ L.), and significantly low on beet ($Beta$ $vulgaris$ var. Ruba), kale($Brassica$ $oleracea$ L. var. $acephala$ D.C), carrot (Daucus carota L.) and Chinese cabbage ($Brassica$ $campestris$ L.) which were not different significantly. The total number of eggs laid by $D.$ $reticulatum$ was the highest (n = 109.6) on cucumber and the lowest (n = 10.1) on leaf perilla ($Perilla$ $frutescens$ var. $japonica$ Hara). Hatchability was the highest (92.4%) on cucumber and the lowest (62.5%) on leaf perilla. The egg developmental period was not significantly different from 12 days to 13 days among host plants. Juvenile period and adult longevity ranged from 75 days to 111 days and 66 days to 187 days, respectively. Thereby, life span from egg to adult longevity of $D.$ $reticulatum$ was the longest on cucumber with 273 days and the shortest on 190 days on leaf perilla.