• Title/Summary/Keyword: Oidium

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Oidium oxalidis, a Powdery Mildew Fungus New to Korea (한국산(韓國産) 미기록(未記錄) 흰가루병균(病菌) Oidium oxalidis에 대하여)

  • Shin, Hyeon-Dong;La, Yong-Joon
    • The Korean Journal of Mycology
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    • v.11 no.1
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    • pp.33-34
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    • 1983
  • 흰가루병(病)에 감염(感染)된 괭이밥(Oxalis corniculata L.)을 1982년(年) 6월(月) 수원(水原)에서 다수(多數) 채집(採集)하였다. 병원균(病原菌)의 형태적(形態的) 특징(特徵)을 검경(檢鏡)한 결과(結果), 한국산(韓國産) 미기록(未記錄) 흰가루병균(病菌)인 Oidium oxalidis McAlp.로 동정(同定)되었다. 이병식물(罹病植物)은 10월말경(月末頃) 거의 고사(枯死)하였으며, 이 병원균(病原菌)의 완전세대(完全世代)는 관찰(觀察)되지 않았다.

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Occurrence of Powdery Mildew on Statice (Limonium shinuatum) Caused by Oidium sp. in Korea (Oidium sp.에 의한 스타티스 흰가루병 발생)

  • Kwon, Jin-Hyeuk;Kang, Soo-Woong;Kim, Jeong-Soo;Park, Chang-Seuk
    • The Korean Journal of Mycology
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    • v.29 no.1
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    • pp.75-78
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    • 2001
  • The powdery mildew of Statice (Limonium shinuatum) extensively occurred in the experimental farm of Changwon Floricultural Experiment Station, Kyongsangnam-do Agricultural Research and Extension Services in 2000. Both sides of the leaves, petioles and stems were covered with the white fungal spores and mycelia, and then the leaves, petioles and stems became dark-colored, eventually died. The conidia and conidiophores formed on the lesion were observed. Conidia were cylindric to ellipsoid, $25.3{\sim}49.4{\times}12.3{\sim}7.2{\mu}m$ in size and borne singly on conidiophore. Fibrosin bodies were not observed. Conidiophores were stright with 2-4 cylindric cells, and $65.7{\sim}124.8{\mu}m$ in size. Appressorium was lobed type. Cleistothecia were not formed. This is the first report on powdery mildew of Statice (Limonium shinuatum) caused by Oidium sp. in Korea.

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Powdery Mildew on Broad Bean (Vicia faba) Caused by Oidium sp. in Korea (Oidium sp.에 의한 잠두 흰가루병 발생)

  • 권진혁;강수웅;박창석
    • Research in Plant Disease
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    • v.7 no.2
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    • pp.120-122
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    • 2001
  • The powdery mildew of broad bean (Vicia faba) extensively occurred in farmers' fields in Changseon-myon, Namhae-gun, Gyeongsangnam-do, Korea in 2001. Both sides of the leaves and stems were covered with white fungal spores and mycelia, and then the leaves and stems colored brown and dark brown and eventually died. Conidia and conidiophores were formed on the lesion. Conidia were cylindric, 29~45$\times$13~23 um (av, 36~18 um) in size and born singly on the conidiophore. Fibrosin bodies were not observed. Conidiophores were straight with 3-4 cylindric cells and 51~100$\times$6~10 um (av.70$\times$8 um) in size. Foot cell was 28~53$\times$7~10 um (av,39$\times$8 um) in size. Appressorium was a lobed type. Cleistothecia were not formed. This is the first report on powdery mildew of broad bean caused by Oidium sp. in Korea.

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Powdery Mildew on Phlox Caused by Oidium sp. in Korea (Oidium sp.에 의한 풀협죽도 흰가루병 발생)

  • Kwon, Jin-Hyeuk;Park, Chang-Seuk
    • The Korean Journal of Mycology
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    • v.31 no.1
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    • pp.50-52
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    • 2003
  • The powdery mildew of Phlox (Phlox paniculata) extensively occurred in the experimental farm of Cheongam-myon, Hadong-gun, Gyeongnam province in 2002. Both sides of the leaves and stems were covered with the white fungal spores and mycelia, and then the leaves became brown to dark brown in color, eventually died. The conidiophores on the lesion were observed. Conidia were cylindric in shape, colorless, $25.3{\sim}49.4{\times}12.3{\sim}17.2{\mu}m$ in size and borne singly on conidiophore. Fibrosin bodies were not observed. Conidiophores were straight with 2-4 cylindric cells, and $65.7{\sim}124.8{\mu}m$ in size. Appressoria were lobed. Cleistothecia were not formed. This is the first report on powdery mildew of Phlox caused by Oidium sp. in Korea.

Powdery Mildew Fungi and Their Host Plants from Kangwon Province (강원도(江原道)에서 채집(採集)한 흰가루병균(病菌)과 기주식물(寄主植物))

  • Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.22 no.3
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    • pp.229-246
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    • 1994
  • Powdery mildew fungi from 246 different species of host plants were collected at Kangwon province during 1989-1993 years. They were identified and classified into 13 genera and 83 species by examining various morphological characteristics of taxonomic value. Most of host plants were infected with one species of powdery mildew fungus, but eight plant species with two or three different mildews. Among 246 host plants collected, 43 species were added as the new host plants of powdery mildew fungi in Korea. Two Oidium spp. from Hibiscus and several Compositae plants were described to suggest their taxonomic problems.

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Inhibitive Effect of Fuyuziphine isolated from Plant (Pittapapra) (Fumaria indica) on Spore Germination of Some Fungi

  • Pandey, M. B.;Singh, Ashok K.;Singh, Anil K.;Singh, U. P.
    • Mycobiology
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    • v.35 no.3
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    • pp.157-158
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    • 2007
  • The alkaloid fuyuziphine was isolated from the whole plant of Fumaria indica. It had inhibitive effect against spore germination of some plant pathogenic fungi (Collectotrichum sp., C. gloeosporioides, C. falcatum, Curvularia maculans, C. lunata, Erysiphe cichoracearum, Helminthosporium pennisetti, Oidium erysiphoides, Ustilago cynodontis, Alternaria chieranthi, A. mel-ongenae, A. brassicicola and A. solam). Curvularia lunata, Oidium erysiphoides, Alternaria brassicicola and A. solani did not germinate at 750 and 1000 ppm and Colletotrichum gloeosporioides, C. falcatum, Curvularia maculans were inhibited at 1000 ppm for 24 hr incubation. Germination of most fungi was significantly inhibited at $100{\sim}750ppm$.

New Hosts of Ampelomyces quisqualis Hyperparasite to Powdery Mildew in Korea (한국에서 흰가루병에 대한 중복기생균 Ampelomyces quisqualis의 새로운 기주)

  • Lee, Sang-Yeob;Kim, Yong-Ki;Kim, Hong-Gi;Shin, Hyeon-Dong
    • Research in Plant Disease
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    • v.13 no.3
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    • pp.183-190
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    • 2007
  • 308 isolates of Ampelomyces quisqualis were isolated from powdery mildew fungi of 73 plant species in Korea from 1994 to 2004. Among them, the new mycohosts and new plant hosts of A. quisqualis were found in 13 species of powdery mildew fungi in 38 species of plant. The new hosts of A. quisqualis were Erysiphe heraclei on Heracleum moellenderfii; E. hommae on Elsholtzia splendins; E. glycines on Glycine max; E. lespedezae on Lespedeza biclor; E. pileae on Pilea mongolica; E. pisi on Phaseolus radiatus; E. polygoni on Rumex aquatica and Rumex crispus; Golovinomyce artemisiae on Artemisia princeps var. orientalis; G. cichoracearum on Rudbeckia laciniata var. hortensis; G. rubiae on Rubia akane; Oidium sp. on Valeriana fauriei, Lactuca indica var. laciniata, Carpesium triste var. manshuricum, Aster ageratoides var. turczaninow, Lufa cylindrica, Ixeris demtats Nakai, Phlox paniculata, Bidens bipinnata and Pathenocissus tricuspidata; Microsphaera alphitoides on Quercus aliema, M. pseudolonicerae on Cocculus trilobos; Podosphaera sp. on Ligustrum obtusifolium; Sphaerotheca aphanisi on Fragaria ananassa; S. balsaminae on Impatiens textori; S. fusca on Cucurbita pepo, Cucurbita maxima, Ligularia fischeri, Solanum melongena, Lagenaria leucantha, Cucumis melo var. makuwa, Acalypha australis, Cosmos bipinnatus and Aster scaber; Uncinuliella simulans on Rosa muliflora and Uncinula australiana on Lagerstroemia indica.

Lasiodiplodia theobromae is a Mycoparasite of a Powdery Mildew Pathogen

  • Kumar, P. Sreerama;Singh, Leena
    • Mycobiology
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    • v.37 no.4
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    • pp.308-309
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    • 2009
  • Powdery mildews on over 40 plants in Bangalore were screened during July-December of 2003~2008. Isolates from mycoparasitised Oidium caesalpiniacearum of Bauhinia purpurea comprised Lasiodiplodia theobromae, in addition to Ampelomyces quisqualis. Koch's postulates were satisfied to establish the mycoparasitism of L. theobromae. This is the first report that L. theobromae acts as a mycoparasite of a powdery mildew.

A study on microorganisms during the tobacco fermentation (엽연초(葉煙草) 인공(人工) 숙성중(熟成中)의 미생물(微生物)에 관(關)한 연구(硏究))

  • Yang, C.B.;Chun, J.K.;Kim, J.H.;Bae, H.W.
    • Applied Biological Chemistry
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    • v.7
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    • pp.53-58
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    • 1966
  • A study was carried out to investigate the microorganisms and their floral changes during the tobacco fermentation. The results were sumarized as follows. I. The molds in the "tobacco leaves" were isolated and identified as follows; Aspergllus flavus Link, A. restrictus G. Smith, A. nidulans (Eidam) Wint, A. awamori, Oidium sp. Edmundmasonia sp. Spicaria sp. II. The bacteria in the tobacco were isolated and identified as follows; Bacillus subtilis, B. subtilis var aterriums. B. licheniformis, B. cereus, B. Pumilus, B. megaterium, Flavobacterium harrisonii, Aerobacter aerogenes. III. The counts of the microorganisms on leaves taken from bulks of the fermenting leaf tobacco revealed the presence of relatively small number on the initial stage of the fermentation. During the tobacco fermentation the number of molds increase gradually to the maximum until the 14 th. day of the fermenation, followed by showing, the plateau, and the bacteria population revealed the maximum on the 7 th. day, then declined slowly.

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Genetic Transformation of a Mushroom Forming Fungus Coprinellus congregatus to an Antibiotic Resistance Using Oidia Instead of Protoplast Generation (먹물버섯 Coprinellus congregatus에서 분열자를 사용한 형질전환)

  • Park, Nam-Mee;Kim, Dong-Sik;Choi, Hyoung-T.
    • Korean Journal of Microbiology
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    • v.42 no.1
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    • pp.59-61
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    • 2006
  • Genetic transformation of a mushroom-forming fungus Coprinellus congregatus to antibiotic resistance gene had been successfully carried out by electroporation to oidia instead of protoplasts. Since there was no protoplast generation step which required not only cell wall degrading enzymes but many skillful procedures, commercial herbicide (basta) could be used without any difficulty with simple procedure. The transformation yield was 10-20 $transformants/{\mu}g$ DNA, and the transformants were very stable even after 10 consecutive transfers through the non-selective medium.