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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Research in Plant Disease
Journal Basic Information
Journal DOI :
Korean Society of Plant Pathology
Editor in Chief :
Volume & Issues
Volume 9, Issue 4 - Dec 2003
Volume 9, Issue 3 - Sep 2003
Volume 9, Issue 2 - Jun 2003
Volume 9, Issue 1 - Mar 2003
Selecting the target year
Assessments of Yield and Quality of Rice Affected by Rice Panicle Blast
Shim, Hong-Sik ; Kim, Yong-Ki ; Hong, Sung-Jun ; Han, Seong-Sook ; Sung, Jae-Mo ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 183~188
DOI : 10.5423/RPD.2003.9.4.183
Correlation between the rice panicle blast and the rice quality and yield was evaluated in field experiments. Results showed that there were high positive correlations between the disease incidence and the rice yield and quality. The correlation coefficients between the disease incidence and the yield of Jinmibyeo, an early maturing cultivar and Juanbyeo, an middle maturing cultivar were
Identification of Bacteria Causing Fermentation of Oriental Melon in Korea
Choi, Jae-Eul ; Cha, Sun-Kyung ; Kim, Jin-Hee ; Yuk, Jin-Ah ; Hwang, Yong-Soo ; Kwon, Soon-Wo ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 189~195
DOI : 10.5423/RPD.2003.9.4.189
Bacteria causing fermentation in Oriental melon were identified as three independent groups on the basis of 16S rDNA sequence analysis. The 16S rDNA sequence of the strain CM2105 showed the highest identity (99.6%) with that of Microbacterium phyllosphaerae, and also indicated high sequence identity to that of M. holiorum (99.5%). The 16S rDNA sequences of the strain CM2101 and CM2121 matched at the high sequence similarity (98.9%, 98.8, respectively), to that of Pseudomonas pavonacea, and the DNA sequence of CM2126 showed high sequence identity to that of P. costantinii (99.5%), and P. grimontii (99.0%). The 16S rDNA sequence of the strain CM2113 showed the highest identity (99.7%) with that of Enterobacter cloacae. The 16S rDNA sequences, the physiological and biochemical analysis suggested that the strain CM2105 belonged to Microbacterium phyllosphaerae, CM2101, CM2121 and CM2126 to Pseudomonas spp., CM2113 to Enterobacter cloacae.
Incidences and Causal Agents of Postharvest Fruit Rots in Kiwifruits in Korea
Koh, Young-Jln ; Lee, Jae-Goon ; Hur, Jae-Seoun ; Jung, Jae-Sung ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 196~200
DOI : 10.5423/RPD.2003.9.4.196
Sixteen hundred fruits were randomly collected from 16 kiwifruit (Actinidia deliciosa) orchards in Jeonnam, Gyeongnam and Jejn provinces in Korea in 2000 and incidences of postharvest fruit rots were examined. The overall disease incidence was 32% and varied much with locations of orchards ranging from 5 to 68%. The percentages of kiwifruits showing internal, external, and both internal and external symptoms were 21.9%, 4.9%, and 5.2%, respectively. Several fungi were isolated from rotten fruits; Botryosphaeria dothidea, Diaporthe actinidiae and Botrytis cinerea were the major pathogens with the average isolation rates of 83.3%, 11.9% and 1.4%, respectively. Based on the symptoms on kiwifruits and the characteristics, the postharvest fruit rots caused by B. dothidea and D. actinidiae are suggested to be named as ripe rots and stem-end rots, respectively.
Effect of Ripening Temperatures on Incidences of Postharvest Fruit Rots of Kiwifruits
Koh, Young-Jln ; Lee, Jae-Goon ; Hur, Jae-Seoun ; Jung, Jae-Sung ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 201~204
DOI : 10.5423/RPD.2003.9.4.201
This study was conducted to identify optimum ripening condition for kiwifruits (Actinidia deliciosa) to prevent postharvest fruit rots caused by Botryosphaeria dothidea, Diaporthe actinidiae and Botrytis cinerea. The optimum temperatures for mycelial growth of B. dothidea, D. actinidiae and B. cinerea were
, respectively, and the incidence was closely related with the temperature. Although kiwifruits ripened faster at higher temperatures, the rates of diseased fruits increased with the rates of ripened fruits increased. Optimum conditions for ripening of kiwifruit were 20-day at 17C.
Optimum Spray Program of Preventive Fungicides for the Control of Postharvest Fruit Rots of Kiwifruit
Koh, Young-Jin ; Lee, Jae-Goon ; Hur, Jae-Seoun ; Park, Dong-Man ; Jung, Jae-Sung ; Yu, Yong-Man ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 205~208
DOI : 10.5423/RPD.2003.9.4.205
Fungicides of tebuconazole wp, iprodione wp and flusilazole wp were applied for the control of postharvest fruit rots of kiwifruit (Actinidia deliciosa) in the field in 2000 and 2001. More than 3 consecutive applications of these fungicides from the late June with 10-day-interval successfully controlled the diseases. It was found in the field trial in 2002 that 4 consecutive spays from mid of June with 10-day-interval was found to be the most effective application program for tebuconazole wp, iprodione wp and flusilazole wp, The results suggested that currently registered fungicides of benomyl wp and thiophanate-methyl wp can be substituted by tebuconazole wp, iprodione wp and flusilazole wp for the control of the diseases in Korea. Use of these fungicides can restrain emergence of fungicide resistant strains of postharvest fruit rot pathogens with benefit of reduced application of chemicals for food safety and environmental conservation.
Blister blight of Tea (Thea sinensis) Caused by Exobasidium vexans in Korea
Kwon, Jin-Hyeuk ; Jeong, Seon-Gi ; Park, Chang-Seuk ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 209~212
DOI : 10.5423/RPD.2003.9.4.209
Blister blight was occurred on tea (Thea sinensis) in a farmer`s tea garden located in Sicheon-myon, Sancheong-gun, Gyeongnam province, Korea. The typical symptoms of the disease were appeared on the leaves and bud. The early symptom were started with small yellowish spots then infected area became upheave and covered with white blister which the hymenium de.veloped from under neath of epidermis. Generally, the infected leaves and buds were appeared like rice cake. Colonies formed on PDA were developed white, later turned milk white. Basidia were 2 sterigma, and 30
in size. Basidiospores were ellipsoid curved, coloriess, 1-celled and 11
in size. The optimum temperature for growth of the fungus was about
on PDA and PSA. This is the first report on the blister blight of tea caused by Exobasidium vexans in Korea.
Occurrence of Brown Blight of Tea Plant Caused by Pseudomonas syringae pv. theae in Korea
Choi, Jae-Eul ; Cha, Sun-Kyung ; Ryuk, Jin-Ah ; Choi, Chun-Hwan ; Nou, Ill-Sup ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 213~216
DOI : 10.5423/RPD.2003.9.4.213
A bacterial disease of tea plants(Camellia sinensis L.) was found in the graftage nursery grown under vinyl house conditions in Suncheon city, Korea, in spring of 2002. The primary symptoms of the disease include small, water-soaked and dark brown spot development on the young leaves. This spot gradually increases in size, especially taking on elongate shape along the midrib or vein of the leaf, and then turns black. The diseased leaves were defoliated easily. Ten strains were isolated from the infected leaf. Inoculation on tea leaf with these isolates produced the same symptoms of naturally infected plants. On the basis of stain reactions, morphological characterization, colony pattern, physiological and biochemical reactions, the bacterium was identified as Pseudomonas syringae pv. theae. This is the first report of brown blight of tea plant in Korea.
Blue Mold of Persimmon (Diospyros kaki) Caused by Penicillium crustosum
Kwon, Jin-Hyeuk ; Park, Chang-Seuk ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 217~220
DOI : 10.5423/RPD.2003.9.4.217
A severe fruit rot of Persimmon (Diospyros kaki cv: Fuyu) was occurred during the storage and transport that infected with blue mold in Sweet Persimmon Experiment Station, Gyeongsangnam-do Agricultural Research and Extension Services, Korea. Fruit surfaces were infected with the fungus first and the colonized fungus formed mycelial mats. From the point of infection, fruits become collapsed and mostly ruptured. The pathogenic fungus from infected fruits was isolated and cultured on PDA. Colony color of the fungus was white at frist than became green on Malt Extract Agar and Czapek Yeast Extract Agar. Conidia were ellipsoid subglobose and 2.6
in size. Stipes were 86
in size. Rami were 7.5
in size, Ramuli were 12.4
in size, Metulae were 8.9
in size. Phialides were ampulliform, 8.2
in size. Based on the cultural and mycological characteristics and pathogenecity test on host plants, the fungus was identified as s, This is the first report on the blue mold of Persimmon (Diospyros kaki) caused by P. crustosum in Korea.
Stem Rot of Obedient plant (Physostegia virginiana) Caused by Sclerotium rolfsii
Kwon, Jin-Hyeuk ; Park, Chang-Seuk ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 221~223
DOI : 10.5423/RPD.2003.9.4.221
In May 2002, a destructive stem rot of Obedient plant (Physostegia virginiana) occurred sporadically in an exhibition farm of Hamyang-gun, Gyeongsangnam-do Agricultural Research and Extension Services, Korea. The typical symptoms of the disease were stem rot, crown rot, wilt or blight. Upper parts of the infected stems were mostly blighted. White mycelial mats were spread over lesions and the sclerotia were formed on the stems near soil line. The sclerotia was globoid or irregular in shape, 1
3 mm in size, and brown in color. The optimum temperature for fungal growth was about
. The typical clamp connections were observed in the hyphae of the fungus grown on PDA, and hyphal diameter was 3.6
. On the basis of mycological characteristics and test of pathogenecity to host plants, the fungus was identified as Sclerotium rolfsii. This is the first report on the stem rot of Physostegia virginiana caused by Sclerotium rolfsii in Korea.
Chemical screening for control of Metalaxyl-resistant tobacco black shank disease
Kang, Yue-Gyu ; Chung, Yun-Hwa ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 224~228
DOI : 10.5423/RPD.2003.9.4.224
Five commercial chemicals, Dimethomorph, Foseyl-Al, Oxadixyl + Mancozeb, Propamocarb hydrochloride, and Metalaxyl, were tested for control of tobacco black shank (Phytophthora nicotianae) and/or delaying buildup of the resistant population to Metalaxyl which has been used for control of the disease in Korean tobacco farms. Propamocarb hydrochloride seemed to have a cross-resistance to the Metalaxyl resistant isolates showing similar response with Metalaxyl in vitro. Meanwhile, Dimethomorph+Mancozeb and Oxadixyl+Mancozeb were selected to be the promising chemicals which are able to be alternative to Metalaxyl for the black shank control in accordance with in vitro and in field trial.
Biological Control of Blue Mold of Apples by Bacillus spp. and Serratia marcescens
Kim, Yong-Ki ; Lee, Seong-Don ; Ryu, Jae-Gee ; Ryu, Jae-Dang ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 229~236
DOI : 10.5423/RPD.2003.9.4.229
The 1080 epiphytic bacteria obtained from 370 samples of pome and stone fruits including apple, pear, peach, grape, apricot and Chinese quince were screened for antagonistic activity against postharvest pathogens, Penicillium expansum, Alternaria alternata and Botrytis cinerea. Among tested antagonistic bacteria, eight bacterial isolates inhibited mycelial growth of the postharvest pathogens and were identified as Bacillus amyloliquefaciens (three strains), B. megaterium, B. subtilis var. gladioli, B. licheniformis, B. pumilus and Serratia marcescens based on biochemical characteristics and utility of carbon and nitrogen compounds (Biolog system). Eight carbohydrates were evaluated for their effect on mycelial growth and germination of the postharvest pathogen, P. expansum to select nutrients for enhancing bio-control efficacy. The growth of four selected antagonists, B. amyloliquefaciens P43-2, B. amyloliquefaciens A71-2, B. licheniformis P94-1, and S. marcescens P76-9 were also tested. As a result, 1% glucose (w/v) strongly stimulated growth of the antagonists, suppressed mycelial growth of the postharvest pathogen, and had a little comparatively stimulatory effect on germination of the the postharvest pathogen. It was confirmed that the addition of 1% glucose (w/v) greatly enhanced biocontrol effect of B. amyloliquefaciens P43-2, B. licheniformis P94-1, and S. marcescens P76-9. Application of B. amyloliquefaciens P43-2, B. licheniformis P94-1, and S. marcescens P76-9 with the addition of 1% glucose (w/v) increased the control efficacy up to 48%, 46%, 14% compared with those of the antagonists without glucose, respectively. When the antagonists were applied to control postharvest disease caused by P. expansum in apple wounds, the population of B. amyloliquefaciens P43-2 and B. licheniformis P94-1 increased until 4 days after inoculation (DAI) of the antagonists and then decreased from 10 DAI. Meanwhile the population of S. marcescens P76-9 decreased at early stage (4 DAI), but increased from 7 DAI, and finally maintained constantly until 10 DAI in apple wounds.
Influence of virus infection in quality of production of Lilium x fomolongi as cut-flowers
Chung, B.N. ; Jung, J.A. ; Lee, E.J. ; Kim, J.S. ; Jeong, M.I. ;
Research in Plant Disease, volume 9, issue 4, 2003, Pages 237~241
DOI : 10.5423/RPD.2003.9.4.237
Damages caused by infection with Cucumber mosaic virus (CMV), Lily mottle virus (LMoV) and Lily symptomless virus (LSV) were assessed by comparing growth of plants produced from seeds of Lilium x fomolongi cultivar `Noesan` both infected and free from infection with those viruses. Symptoms and infection rate were investigated in field-grown lily.Dominant viral infection symptom in the field was mottle on leaves, caused by natural infection with LMoV. Incidence of viral disease caused by mixed infection with two of LMoV, CMV and LSV in field-grown Lilium x fomolongi cultivars, reused for more than 6 years consecutively, was 80 percent. In comparison with healthy Lilium x fomolongi cultivar `Noesan`, plants doubly infected with CMV-Li1 and LMoV-Li diminished their plant height by 14 percent, fresh weight by 38 percent, and flower length by 15 percent. Lily plants singly infected with CMV-Li1 or LMoV-Li significantly reduced their freish weight by 21.8% and 28.4% compared to healthy plants, respectively.