• Title/Summary/Keyword: Nematode-trapping fungi

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Isolation and Indentification of Nematode-Trapping Fungi (선충포획균의 분리 및 동정)

  • 박용근;이영록
    • Korean Journal of Microbiology
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    • v.21 no.3
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    • pp.127-134
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    • 1983
  • 42 strains belonging to the genus Arthrobotrys and 17 strains belonging to the genus Monacrosporium, were isolated from soil specimens collected from the various localities in South Korea. 4 species of Arthrobotry and 2 species of Monacrosporium, which are unrecorded in Korea, were identified according to the Harrd and Cooke classification key, respectively. The species identified are as follows ; A.conoides, A. oligospora, A. musiformis, A. oviformis, M. crystosporum nd M. salinum.

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First Report of Two Nematode-trapping Fungi, Monacrosporium ullum sp. nov. and Arthrobotrys amerospora, from Korea

  • Kim, Dong-Geun;Ryu, Young-Hyun;Hwang, Hyung-Gue
    • The Plant Pathology Journal
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    • v.22 no.2
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    • pp.174-178
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    • 2006
  • Monacroporium ullum sp. nov. the captures nematodes on adhesive spherical knobs was isolated from soil around Codonopsis lanceolata at Ulleung island, Korea. The spindle-shaped conidia sized $17-44{\mu}m\;(26.5{\mu}m)\;long,\;7-10{\mu}m\;(8.1{\mu}m)$ wide, containing from 1 to 4 cross-walls but most often divided by 2 septa (47%). Resting bodies sized $57{\times}30{\mu}m$. Arthrobotrys amerospora has almost spherical non-septate conidia with a small truncate protuberance at the base and sized $20-27{\mu}m\;(23.3){\mu}m$ long and $11-17{\mu}m\;(14.1){\mu}m$ wide. Conidiophores are somewhat longer $362.8{\mu}m\;(311-418{\mu}m)$ than its original description ($75-250{\mu}m$).

First Report of an Unrecorded Nematode-trapping Fungus, Arthrobotrys sinensis in Korea (국내 미기록 선충포식성 곰팡이 Arthrobotrys sinensis의 형태 및 분류)

  • Ha, Jihye;Kang, Heonil;Kang, Hangwon;Kim, Donggeun;Lee, Dongwoon;Kim, Yongchul;Choi, Insoo
    • Korean journal of applied entomology
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    • v.58 no.1
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    • pp.9-13
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    • 2019
  • Nematode-trapping fungi use various specialized traps to capture nematodes. A fungus that can capture nematodes in three dimensional adhesive networks was isolated from the soil around the root of Cucumis melo L. (Oriental melon) in Seongju, Korea. The conidiophores were found to be septate, hyaline, erect and $290-528(342.8){\mu}m$ high. It produces obovoid shape and 1-3 septate (commonly 2-septate) conidia with a size of $30.5{\times}20.3{\mu}m$. Molecular analysis of 5.8 S rDNA displayed 99% similarity to Arthrobotrys sinensis. On the basis of morphological, morphometric and molecular studies, the fungus was identified as A. sinensis. It is the first report in Korea which can be one of biological control resource of plant-parasitic nematode.

Effect of Fertilizers and Neem Cake Amendment in Soil on Spore Germination of Arthrobotrys dactyloides

  • Kumar, D.;Singh, K.P.;Jaiswal, R.K.
    • Mycobiology
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    • v.33 no.4
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    • pp.194-199
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    • 2005
  • Application of fertilizers such as urea, diammonium phosphate (DAP) and muriate of potash in soil adversely affected the spore germination of Arthrobotrys dactyloides. Amendment of soil with urea at the concentrations of 1.0%, 0.5% and 0.1 % completely inhibited spore germination and direct trap formation on the conidium, whereas muriate of potash delayed and reduced the spore germination even at the lowest concentration. DAP also inhibited spore germination at 1.0% concentration, while at lower concentration the percentage of spore germination was reduced. Application of neem cake at the concentration of 0.5% also inhibited spore germination after 24 h of amendment. The inhibitory effect of neem cake was reduced after 15 days of amendment, while after 30 days after amendment the inhibitory effect was completely lost and the spore germinated by direct trap as in unamended soil. Nematodes were not attracted to ungerminated spores after 24 h of amendment. After 15 days of amendment nematodes were attracted to agar blocks containing fewer germinated spores after 24 h of incubation but after 48 h of incubation large number of nematodes were attracted and trapped by the germinated spores with direct traps. After 30 days of amendment, larger number of nematodes were attracted and trapped by direct traps.