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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 18, Issue 4 - Dec 2012
Volume 18, Issue 3 - Sep 2012
Volume 18, Issue 2 - Jun 2012
Volume 18, Issue 1 - Apr 2012
Selecting the target year
Controlling Effect of Agricultural Organic Materials on Phytophthora Blight and Anthracnose in Red Pepper
Park, Se-Jung ; Kim, Ga-Hye ; Kim, A-Hyeong ; Lee, Ho-Taek ; Gwon, Hyeon-Wook ; Kim, Joo-Hyeng ; Lee, Kyeong-Hee ; Kim, Heung-Tae ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 1~9
DOI : 10.5423/RPD.2012.18.1.001
A total of 20 agricultural organic materials including inorganic compounds, plant oils and plant extracts were used in the study for assessing the control efficacy on pepper diseases. Among inorganic compounds, only copper hydroxide showed inhibitory effect on both Phytophthora capsici causing Phytophthora blight and Colletotrichum acutatum causing anthracnose. Phosphorous acid inhibited the growth of P. capsici on PDA, and Sulfur/quicklime had it on that of C. acutatum. Plant essential oil, rosemary oil, and rapeseed oil among plant oils and plant extract of Japanese apricot/ginkgo nut inhibited the mycelial growth of the two pathogens. In the screening using pepper plant seedlings, the control efficacy on Phytophthora blight in 6-leaf stage of seedling was superior to that in 4-leaf stage of seedling. A protective effect on Phytophthora blight was displayed by copper hydroxide, sulfur/quicklime, water soluble calcium, phosphorous acid, plant essential oil, and cloves extract. When C. acutatum was inoculated by the non-wound method, copper hydroxide and rapeseed oil showed excellent protective activities with control values of 91.3% and 82.6%, respectively. However, copper hydroxide did not show any activity, when C. acutatum was inoculated after wounding pepper fruits. All organic materials never showed the curative effect on Phytophthora blight and anthracnose in pepper seedling assay and fruit assay.
Effects of Different Seeding Rates on Disease Incidences of Wheat Sharp Eyespot and Selection of Fungicides
Park, Jong-Chul ; Lee, Eun-Sook ; Cho, Kwang-Min ; Lee, Mi-Ja ; Kang, Chun-Sik ; Choi, Jae-Seong ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 10~16
DOI : 10.5423/RPD.2012.18.1.010
This study was conducted to examine the effects of the seeding rate on the disease incidence of sharp eyespot(Rhizoctonia cerealis) on three different varieties and to select effective chemicals to control the disease. When the seeds were sown twice as many as the recommendation, the disease incidence increased by approximately 13%. However, the susceptible variety 'Jopummil' alone showed the significantly enhanced disease incidence at a two-fold seeding rate. Two chemicals such as Hexaconazole EC and Tebuconazole EC highly inhibited the fungal growth on agar medium. However, two strobilurin fungicides such as Pyraclostrobin EC and Trifloxystrobin SC were relatively weak. The fungicides tested displayed the similar in vivo antifungal activities as in vitro activities. Hexaconazole EC and Tebuconazole EC showed the strongest both protective and curative activities and the protective activities of the chemicals were generally higher than the curative activities. Hexaconazole EC and Tebuconazole EC controlled the disease by 64% and 73%, respectively, and the two chemicals reduced the disease by 45% and 39%, respectively, when they were applied one day after pathogen inoculation. These results indicate that both Hexaconazole EC and Tebuconazole EC could be used to control sharp eyespot on wheat.
Control Effects of Indole Isolated from Xenorhabdus nematophila K1 on the Diseases of Red Pepper
Jeon, Mi-Hyeon ; Cheon, Won-Su ; Kim, Yong-Gyun ; Hong, Yong-Pyo ; Yi, Young-Keun ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 17~23
DOI : 10.5423/RPD.2012.18.1.017
Indole compound is a bacterial metabolite synthesized and released by an entomopathogenic bacterium, Xenorhabdus nematophila K1. The antibiotic activity was evaluated against plant pathogens, such as Phytophthora blight and anthracnose of red pepper. Indole significantly suppressed mycelial growth of Phytophthora blight and anthracnose pathogens. Under natural sunlight conditions, indole maintained the antifungal activity for at least sixty days. The activity was not affected under the condition of soil-water. When the indole suspension was applied to surface soil before transplanting of red pepper seedlings and was then regularly sprayed to the foliage of the plants with ten days interval, it resulted in significant reduction of the disease occurrences (Phytophthora blight, anthracnose, soft rot, and black mold) by about 30%. These results suggest that indole can be used to control Phytophthora blight and anthracnose of red pepper.
Disease Assessment in Transgenic Rice (CPPO06) Resistant to the Protox-inhibiting Herbicide
Kim, Ga-Hye ; Lee, Ho-Taek ; Park, Se-Jung ; Kim, A-Hyeong ; Gwon, Hyeon-Wook ; Kim, Joo-Hyung ; Kim, Heung-Tae ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 24~28
DOI : 10.5423/RPD.2012.18.1.024
The rice diseases occurring on the transgenic rice plant carrying protox gene (CPPO06) was assessed and compared with other varieties of rice such as Dongjin, Chucheong, Ilpeum, and Onnuri in the fields located in Cheongwon of Chungbuk, Suwon of Gyeunggi, and Gwangju of Chonnam. In the field of Cheongwon, the diseases such as blast, leaf spot, sheath blight and Fusarium blight were observed. False smut were observed only in the field of Suwon, where the ratio of diseased plants was 0.28% in CPPO06 and 0.37% in Onnuri, respectively. In the field of Gwangju, leaf spot caused by Cochlioborus miyabeanus was the most severely occurring disease among rice diseases mentioned above. Fusarium blight occurred in all the 3 fields, which were more severe in CPPO06 plants treated with or without oxadiazon as the herbicide. Except for Fusarium blight, there was no significant difference in the rice diseases as blast, leaf spot, sheath blight and false smut between CPPO06 and other rice varieties.
Evaluation of Disease Resistance of Cucurbit Cultivars to Powdery Mildew and Root-Knot Nematode
Kim, Sung-Heun ; Shin, Ji-Eun ; Lee, Kyung-Jun ; Xu, Sheng-Jun ; Kim, Byung-Sup ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 29~34
DOI : 10.5423/RPD.2012.18.1.029
Powdery mildew and root-knot nematode are very important diseases occurred in cucurbits. This study was conducted to evaluate the resistance of commercial cucurbit cultivars (21 cultivars of cucumber, 9 cultivars of watermelon, 7 cultivars of oriental melon, and 2 cultivars of melon) to powdery mildew and root-knot nematode. At 60 days after transplanting, disease severity of powdery mildew of commercial cucurbit cultivars was investigated. Two cucumber cultivars, 'Gangryeogsamcheok' and 'Sunhobaegchimdadagi' were moderately resistant but the rest of cucumber cultivars were susceptible to powdery mildew. All examined watermelon and oriental melon cultivars were susceptible to powdery mildew, while two melon cultivars ('PMR Turbo' and 'PMR Victory') were resistant. At 45 days after inoculation of seedlings, disease severity of root-knot nematode of commercial cucurbit cultivars were investigated. One cucumber cultivars, 'Baegbongdadagi' was moderately resistant and the others were susceptible to root-knot nematode. In case of watermelon, 'Dalgonakkul' was resistant and the others were moderately resistant or susceptible to root-knot nematode. All examined oriental melon and melon cultivars were susceptible to root-knot nematode. On these results, we recommend that resistant cultivars to powdery mildew and/or root-knot nematode will be more suitable in cultivation of cucurbits for organic farming.
Evaluation of Tomato Genetic Resources for the Development of Resistance Breeding Lines against Late Blight
Kim, Byung-Sup ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 35~39
DOI : 10.5423/RPD.2012.18.1.035
Occurrence of tomato late blight (Phytophthora infestans) has caused significant losses in tomato yield in all over the world. Evaluation of the level of resistance in tomato gene resources for main breeding and initiation of the resistance breeding program are important for control of this disease. Resistant assay of 78 tomato cultivars/lines to late blight in pots and field experiment was carried out under controlled and natural conditions in 2009. All commercial cultivars including 'Legend' were susceptible. However, 10 lines including KNU-2, KNU-6-1, KNU-11, KNU-13, KNU-14-1 lines distributed from University of California, Riverside and L3708,
lines which have resistant gene Ph-3 and
were highly resistant to late blight. These highly resistant lines can be used as resources of resistance to late blight in a tomato breeding program in future.
Occurrence of Bacterial Black Spot on Plum by Xanthomonas aboricola pv. pruni and It's Pathogenicity on Varieties of Some Stone Fruits
Ryu, Young-Hyun ; Lee, Joong-Hwan ; Kwon, Tae-Young ; Kim, Seung-Han ; Kim, Dong-Geun ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 40~44
DOI : 10.5423/RPD.2012.18.1.040
Xanthomonas arboricola pv. pruni is the causal agent of bacterial black spot disease on some stone fruits, e.g. peach, plum and apricot. To evaluate pathogenicity of Xanthomonas arboricola pv. pruni strain from plum, inoculum of the isolated strain was spray inoculated to fruits and leaves of apricot, Japanese apricot and plum. Apricot and Japanese apricot showed severe black spot symptoms on fruits and shot hole symptoms on leaves. In case of apricot, about fifty percent of fruits did not grow and dropped by hypersensitive reaction to spray infection. Plum, cv. Formosa was very susceptible, showing severe black injury lesions on fruits and cankers on leaves and new twigs. On the other hand, plum cv. Daesukjosaeng, was highly resistant. Fruits of several plum cultivars such as Formosa and Chuhee were severely infected at natural infected orchards by X. arboricola pv. pruni. Where as those of Daesukjosaeng, Taeyang, Soldam and Hongrogen were moderately infected.
Zonate Leaf Spot of Acer negundo Caused by Cristulariella moricola in Korea
Cho, Sung-Eun ; Park, Ji-Hyun ; Lee, Sang-Hyun ; Lee, Hyang-Burm ; Shin, Hyeon-Dong ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 45~48
DOI : 10.5423/RPD.2012.18.1.045
In early August of 2011, following a prolonged period of cool and moist weather, several trees of boxelder maple (Acer negundo) planted in Mt. Soyo located in Dongducheon, Korea, were found to be heavily damaged by premature defoliation with zonate leaf spot symptoms. Numerous number of cone-shaped, white sporophores (conidia) were observed on lesions of the abaxial leaf surface. The morphological characteristics of conidia are of typical Cristulariella moricola, which was supported by analyzing sequences of internal transcribed spacer region of ribosomal DNA. Pathogenicity of the fungus was proved by artificial inoculation in the condition of relative humidity 100% and
. This is the first report of the occurrence of zonate leaf spot caused by infection of C. moricola on A. negundo in Korea.
Occurrence of Powdery Mildew of Japanese Plum Caused by Podosphaera tridactyla in Korea
Lee, Seong-Chan ; Han, Kyung-Sook ; Cho, Sung-Eun ; Park, Ji-Hyun ; Shin, Hyeon-Dong ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 49~53
DOI : 10.5423/RPD.2012.18.1.049
Occurrence of powdery mildew was found on Japanese plum (Prunus salicina) growing in private gardens in Yanggu, Hongcheon, Hoengseong, and Gapyeong of central Korea, in 2011. Despite of extensive survey, however, there was no powdery mildew infection in commercial orchards of Japanese plum in Korea. The initial symptoms included white, evanescent mycelia and irregular patches on leaves and young stems. Infected leaves later showed partial distortion and diffuse red-purple discoloration. Based on morphological characteristics of holomorph and phylogenetic analysis, the causal fungus was identified as Podosphaera tridactyla. This is the first report of powdery mildew on Japanese plum in Korea.
Sclerotium Rot of Sponge Gourd Caused by Sclerotium rolfsii
Kwon, Jin-Hyeuk ; Kim, Jin-Woo ; Lee, Yong-Hwan ; Shim, Hong-Sik ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 54~56
DOI : 10.5423/RPD.2012.18.1.054
Sclerotium rot of sponge gourd occurred at the experimental field of Gyeongsangnam-do Agricultural Research and Extension Services in August 2010. The infected fruits showed water-soaked and rot symptoms. White mycelial mats spread over lesions, and then sclerotia were formed on fruit and near soil line. The sclerotia were globoid in shape, 1-3 mm in size and white to brown in color. The optimum temperature for mycelial growth and sclerotia formation on PDA was
and the hyphal width was 4-8
. The typical clamp connections were observed in the hyphae of the fungus grown on PDA. On the basis of mycological characteristics, ITS rDNA sequence analysis, and pathogenicity to host plants, this fungus was identified as Sclerotium rolfsii Saccardo. This is the first report of sclerotium rot on sponge gourd caused by S. rolfsii in Korea.
Crown and Foot Rot of Grafted Cucumber Caused by Fusarium solani f. sp. cucurbitae
Han, Kyung-Sook ; Lee, Seong-Chan ; Han, You-Kyoung ; Kim, Dong-Hwi ; Kim, Sui ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 57~61
DOI : 10.5423/RPD.2012.18.1.057
In March 2010, grafted cucumber cultivated in the greenhouse showed a severe rot on crown resulting yellowing and wilting of the leaves. The symptoms of naturally infected plants showed dark brown, watersoaked lesions at the base of the stem. The fungus produced mass of white mycelium and yellow to orange spores in necrotic lesions on dead and dying plants. Fungus was isolated from rotted tissues of the crown and root. On the basis of morphological characteristics, ITS sequence and pathogenicity tests, the isolate was identified as Fusarium solani f. sp. cucurbitae. This is the first report of the crown and foot rot of grafted cucumber caused by F. solani f. sp. cucurbitae in Korea.
Anthracnose of Black Raspberry Caused by Colletotrichum gloeosporioides, C. coccodes, and C. acutatum in Korea
Kim, Ju-Hee ; Jeong, U-Seong ; Cheong, Seong-Soo ; Lee, Ki-Kwon ; Lee, Hee-Kwon ; Lee, Wang-Hyu ;
Research in Plant Disease, volume 18, issue 1, 2012, Pages 62~64
DOI : 10.5423/RPD.2012.18.1.062
Anthracnose was occurred on black raspberry (Rubus coreanus) grown at Gochang areas of Korea during the period of 2003-2009. Black raspberry was afflicted by anthracnose with initial lesion of dark brown circular spots on the naturally infected stems and petioles. The irregular spots was either fused or progressed into circular or elliptical shape. The causal fungi of anthracnose were isolated from the diseased plants and identified as Colltotrichum gloeosporioides, C. coccodes and C. acutatum based on the morphological and cultural characteristics. All isolates of C. gloeosporioides, C. coccodes and C. acutatum produced similar symptoms under pathogenic examination through artificial inoculation.