• Korean journal of applied entomology
• /
• v.15 no.1 s.26
• /
• pp.17-21
• /
• 1976

Four species of the genus Xiphinema have been identified, three of which are new to Korea. X. radicicola which is distributed geographically from the north (Suweon) to the south (Jeiu) of the country is found from soil around roots of apple and elm tree. X. bakeri is a confirmed species to the specimens collected from mulberry grove at Suweon. X. pini was collected from soil around roots of broad leaf lilac and maple trees at Mt. Kyeryongsan. Some notes of Korean populations of X. americanum are given.

• Korean journal of applied entomology
• /
• v.57 no.4
• /
• pp.303-315
• /
• 2018

Bonsai is part of export forest products in Korea. Demand for bonsai exports to other countries is growing but the need for quarantine hazards must be eliminated in other to export. Plant parasitic nematode is also an important factor in quarantine. The nematodes were surveyed from bonsai farms in 6 areas of Korea. The surveyed deciduous bonsai plants were Acer palmatum, Zinnia elegans, Ligustrum obtusiflium, Carpinus turcaninowii, and Malus sieboldii. Three plant parasitic nematodes (Hemicyliophora koreana, Rotylenchus blothrotylus and Xiphinema americanum) and three non-parasitic nematodes (Aporclaimellus donghwaens, Egtitus andhricus, and Mesodorylaimus usitatus) were isolated from bonsai. Non-parasitic nematode, Mesodorylaimus usitatus was isolated from all surveyed bonsai trees. Only two species of quarantine nematodes (Hemcylicopora koreana and Xiphinema americanum) were found from bonsai. A. donghwaens and M. usitatus were isolated from root of bonsai tree. However other nematodes were isolated from soil in bonsai trees.

• Korean Journal of Medicinal Crop Science
• /
• v.12 no.5
• /
• pp.355-359
• /
• 2004

A survey was conducted during $April{\sim}May$ 2004 to determine the occurrence and population density of plant-parasitic nematodes in ginseng (Panax ginseng C.A. Meyer) growing fields, in major ginseng growing regions of Chungbuk, Chungnam, Gyeongbuk and Kyongki provinces. The survey revealed presence of eleven species of plant-parasitic nematodes namely, Criconemoides morgensis, Ditylenchus destructor, Helicotylenchus dihystera, Meloidogyne incognita, M. hapla, Paratylencgus lepidus, Pratylenchus penetrans, Psilenchus hilarulus, Trichodorus similis, Tylenchorhynchus claytoni and Xiphinema americanum. Frequency and density of each species were highly variable. M. incognita and M. hapla were the predominant species, their infestation observed in 46.3 and 39.4% fields with an average density of $78{\sim}254\;and\;76{\sim}211$ nematodes per $300\;cm^3$ soil, respectively. Whereas, T. similis and X. americanum were rarely observed; only in 2.3 and 1.8% of surveyed fields and their density was $10{\sim}17\;and\;7{\sim}10$ individuals per $300\;cm^3$ soil, respectively. They are recorded herewith for the first time from ginseng fields of Korea. In nematode-infestated fields, stunted plant growth with chlorotic leaves, and wilted plants were observed in patches.

• Korean journal of applied entomology
• /
• v.15 no.3 s.28
• /
• pp.133-136
• /
• 1976

In order to survey the kinds and distribution of tobacco parasitic nematodes, 51 soil samples were. collected from 14 associations under the office of Monopoly of Kyungbuk and Kyungnam province. 1, The plant parasitic nematodes were found $96.1\%$ in the whole sampled. 2. The propotion of infested field of each nematode genera, Tylenchus shown as dominant by $82.3\%$ and next Aphelenchus $72.5\%$, Tylenchorhynchus $58.8\%$, Meloidogyne$50.9\%$, Criconemoides $25.4\%$, Pratylenchus, Hirschmanniella $23.5\%$ in order. 3. The density of genera per localities were as follows Pratylenchus is most abundant in Youngdeog as 43 population, Tylenchorhynchus shown in Jinbo, Tylenhus in Yeongil, Meloidogyne in Kimcheon, Xiphinema in Euisung. 4. Eighteen species belonging to 16 different genera of 11 families were identified, 12 of them are new for Korea as tobacco parasitic nematodes; Aglenchus costatus, Aphelenchus avenae, Criconemoides informis, Ditylenchus dipsaci, Helicotylenchus dihystera Hirschmanniella imamuri, Meloidogyne incognita, Psilenchus hilarulus, Rotylenchus pini, Tylenchorhynchus claytoni, Tylenchorhynchus nudus and Xiphinema americanum.

• Korean journal of applied entomology
• /
• v.21 no.3 s.52
• /
• pp.146-152
• /
• 1982

Survey on potato parasitic nematodes has been undertaken in order to find distribution of the nemic fauna. 41 soil samples were taken from potato fields in Gyeongbug, Gyeongnam and Gangweon provinces. Twenty four species belonging to 16 different genera were identified. Potato cyst nematode, Globodera rostochiensis was not found in the areas. Potato-rot nematode, Ditylenchus destructor and stem nematode, Ditylenchus dipsaci were found from several potato fields and population density high and showed damage to the crops. Root-lesion nematode, Pratylenchus minyus, Pratylenchus penetrans, Pratytenchus thornei and Pratylenchus vulnus were found and their population of these four species were high depending on the fields. Root-knot nematode, Meloidogyne hapla and Meloidogyne incognita were found. M. hapla was found only in Gangweon province and the population density was high. M. incognita was found at Milyang in Gyeongnam province. Spiral nematode, Heticotylenchus digonichus, Helicotylenchus dihystera, Helicotylenchus pseudorobustus, Rotylenchus orientalis and Rotylenchus pini were found. Aphelenchoides saprophilus, Criconemoides informis, Ditylenchus destructor, D. dipsaci, Helicotylenchus digonichus, H. dihystera, Hemicriconemoides intermedius, Meloidogyne hapla, Psilenchus hilarulus, Pratylenchus minyus, and Xiphinema americanum were first found from potato fields in Korea.

• Korean journal of applied entomology
• /
• v.22 no.4 s.57
• /
• pp.251-261
• /
• 1983

Survey on soybean parasitic nematodes has been undertaken in order to get an ideas about the distribution of nemic fauna. Total 71 soil samples were collected from soybean fields in Gyeongbug and Chungbug provinces. Eighteen species belonging to fourteen different genera were found associated with soybean, Glycine max. The results were as follows: Aphelenchus avenae, Circonemoides informis, Ditylenchus dipsaci, Helicotylenchus pseudorobustus, Heterodera glycines, Hirschmanniella imamuri, Meloidogyne hapla, Meloidogyne incognita, Paratylenchus pandus, Pratylenchus thornei, Pratylenchus vulnus, Psilenchus hilarulus, Rotylenchus sp. Tylenchorhynchus clay toni, Tylenchorhynchus dubius, Tylenchorhynchus nudus, Tylenchus sp. Xiphinema americanum were found in soybean fields. In frequency of occurring nematodes by localities, soybean cyst nematode was higher in Chungbug by $70\%$, while $50\%$ in Gyeongbug. But rook-knot nematode was higher in Gyeongbug by $54.1\%$, while $19.1\%$ in Chungbug. In density of nematode, Heterodera was the most dominant as 200.4 populations per 100ml soil, Meloidogyne as 107.1 populations, Rotylenchus, Xiphinema, Aphelenchus in decreasing order. In survey of loss, density of soybean cyst nematode in heavily infested fields was 155 cysts per 100ml soil while 35 cysts in slightly infested fields. Seventy percent of soybean yields was decreased when comparing with average 64.2kg/10a in heavily infested fields and average 209.5kg/10a in slightly infested. Correlation coefficients among number of soybean cyst and yields, pod weight, number of pod was negative as r- 0.57, 0.47, 0.38 over all localities.

• Korean journal of applied entomology
• /
• v.2
• /
• pp.27-37
• /
• 1963

최근 농작물에 대한 각종 선충류의 피해가 주목되어 있는 실성에 비추어 필자는 선충류연구의 기초적 과제로서 온실내의 화훼류 근부에서 발견되는 선충류 중 농업상 비교적 중요하다고 인정되는 종류와 그밖에 몇 종류에 대하여 형태적인 특징을 기술하였다. 즉 취급된 종류들은 다음과 같다. 1. Meloidogyne arenaria Chitwood 2. Scutellonema coheni Andrassy 3. Paurodontus gracilis Thorne 4. xiphinema americaum Cobb 5. Rhabditis sp 6. Cephalobus sp 7, Diplogaster sp 그리고 이상 7종류의 기주식물 및 기생정도를 보면 Meloidogyne arenaria Chitwood는 Begonia에 만 기생하였고 그밖에 화훼류에는 기생을 볼수 없었다. Scutellonema choeni Andrassy는 꽃치자, 소펄, 이마리 리스, 제브리나에 가장 많이 발견되었고, Paurodonthus gracilis Thorne는 동백나무, 청목. 지내고사리, 카네이션, 충에서 가장 많이 발견되었다. 그리고 Xiphinema americanum Coob는 산호수, 서향, 코피나무, 시크라맨, 용설란, 동백 등에서만 발견되었으나 그중에 용설란, 동백에서 가장 많이 볼 수 있었다. Rhabditis sp.는 초본류 화훼류의 대부분에서 발견되었으나 그중에도 산세배리아에서 가장 많았다 Diplogaster sp는 대부분의 화훼류에서 발견되었으며 그중에 크로톤에 비교적 많았다. Cephalobus sp.는 전반적으로 발견되었으며 발견정도는 모두 비슷하였다. Monhystera app. , Mononchus spp. , Dorylaimus app. 등도 조사란 과반수의 화훼류들에서 발견되었으나 특히 많이 발견되는 화훼류는 없었다. 이상 선충류중 근류를 형성하여 피해가 가장 주목되는 Mceloidogyne arenaris Chitwood에 대해서 온실내에서 그의 유일한 기주식물인 Begonia의 품종별 기생정도를 비교조사한 결과 semperflorens 품종에 가장 기생률이 높았고 metarica 품종은 중정도였으며 erytholopylla와 argento-guttata 품종들에는 기생이 없었다. 이 점은 매우 의의있는 사실로서 앞으로 더욱 연구할 과제로 삼았다. 끝으로 Sanceberia에서 많이 발견되는 Rhabditis sp를 $18^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$, $35^{\circ}C$의 동온도별의 incubator에서 사육한 결과 본 종의 생육적온이 $30^{\circ}C$라는 사실을 알았다.