• Title/Summary/Keyword: 이병율

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Disinfection of Seed Borne Black Leg Disease(Phoma wasabiae) in Wasabi(Wasabia japonica Matsum.) (고추냉이 먹들이병(Phoma wasabiae)의 종자소독 효과)

  • Moon, Jung-Seob;Kim, Hyung-Moo;Choi, Dong-Chil;Hong, Yoon-Ki;Sung, Moon-Ho;Jang, Young-Jik;Go, Bok-Rae;Oh, Nam-Ki;Choi, Yeong-Geun
    • Journal of Bio-Environment Control
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    • v.12 no.4
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    • pp.180-183
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    • 2003
  • P. wasabiae was isolated from discolored seeds of wasabi(Wasabia japonical Mtsum.) and inoculated to fresh seeds, then the effect of fungicides on suppression of diseases were determined. Emergence rate of wasabi seeds where suppressed to 52.5% by the inoculation and it reached up to 92.7% by dipping treatment of inoculated seeds ito benomyl solution. The incidence rate of black leg disease and damping off were 32.0 and 22.0%, respectively, in control treatment that sown in the soil inoculated with P. wasabiae. But dipping treatment of inoculated seeds into benomyl solution resulted in 12.0% and 10.7% in incidence rate of those two diseases, respectively.

Effect of Red LEDs during Healing and Acclimatization Process on the Survival Rate and Quality of Grafted Tomato Seedlings (토마토 접목묘의 순화과정에서 적색LED광조사가 접목 활착율과 묘소질에 미치는 영향)

  • Vu, Ngoc-Thang;Kim, Young-Shik;Kang, Ho-Min;Kim, Il-Seop
    • Journal of Bio-Environment Control
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    • v.23 no.1
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    • pp.43-49
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    • 2014
  • This study was designed to determine the effect of red LEDs during healing and acclimatization process on the survival rate and quality of grafted tomato seedlings. Red LEDs and no light (darkness) were used for treating three rootstock cultivars, which are 'B-Blocking', 'Kanbarune', 'High-power' in healing room. Results showed that survival rates of grafted seedlings in red LEDs were higher than those in no light treatment. Significant variation on survival rates of rootstock cultivars was observed in no light treatment but there was not significant variation in red LEDs treatment. Light treatment also reduced the percentage of infected plants, except for the 'Kanbarune' cultivar. Seedling quality in red LEDs was better than that in no light treatment by improving growth parameters such as plant height, leaf length, leaf width, leaf area, fresh and dry weight of shoot and root. Light treatments and rootstock cultivars did not affect number of leaves, leaf chlorophyll value and T/R ratio of seedlings, but seedlings in red LEDs were significantly more compact than those in no light treatment. Moreover, the root morphology of seedlings such as total root surface area, total root length, and number of toot tips in red LEDs was also greater than that in no light treatment.

Control Effect of Bacillus subtilis B-4228 on Root Rot of Panax ginseng (Bacillus subtilis B-4228의 인삼 근부병 억제효과)

  • Lee, Byung-Dae;Park, Hoon
    • Journal of Ginseng Research
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    • v.28 no.1
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    • pp.67-70
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    • 2004
  • Bacillus subtilis B-4228 selected from ginseng field soil for prevention of rusty root was tested for the control of ginseng root rot. In petri-plate dual culture, mycelial growth of Cylindrocarpon destructans was inhibited by B-4228 and hyphal swelling of C. destructans was occurred. In pot experiment with C. destructans-contaminated soil B-4228 dipping of ginseng seedling showed significant preventive effect of root rot (p=0.01), percent healthy root 82% and 20% for treatment and control, root rot rate 6% and 50.4%, respectively.

Development Characteristics of Potato Common Scab in Jeju Inland (제주지역 감자더뎅이병 발생 특성)

  • Hong, Soon-Yeong;Kang, Yong-Kil;Hahm, Young-Il
    • Research in Plant Disease
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    • v.9 no.3
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    • pp.137-144
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    • 2003
  • This study was conducted to clarify developmental characteristics of scab in potato fields in Jeju island, Korea from 1995 to 1999. Occurrence of potato scab increased with repeated cultivaton of potato and high soil pH in the fields. Incidence of the disease was high as 54.8% in the repeatedly cultivated potato fields but relatively low as 20.8~26.3% in the non-cultivated fields and in the fields where barley and Chinese cabbage were formerly cultivated. A total of 66 isolates were obtained from the diseased patato tubers and identified as Streptomyces scabies, S.turgidiscabies and S. acidiscabies. The isolation frequency of each Streptomyces species was 37.7%, 14.8% and 18.0%, respectively. The optimum temperature for mycelial growth of the Streptomyces spp. was $28~30^{\circ}C$, and the optimum pH for that 6~7.

Protection of Peach Trees from Bacterial Shot Hole with Bordeaux Mixture Spray during the Postharvest Season (복숭아 수확후 보르도액 살포에 의한 세균성구멍병 방제효과)

  • 김산영;권태영;김임수;최성용;최충돈;엄재열
    • Research in Plant Disease
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    • v.7 no.1
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    • pp.37-41
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    • 2001
  • This experiment was carried out to investigate the prevention of bacterial shot hole by Bordeaux mixture when it was sprayed on peach trees after harvest. bordeaux mixture was sprayed on \`Mibaeko\` peach trees 1 to 3 times after mid September, and the occurrence of bacterial shot hole was examined in the next year. Bacterial shot hole in leaves appeared from mid May and thereafter increased gradually. The more times was sprayed Bordeaux mixture, the less peaches were diseased with bacterial shot hole. At the beginning of August, the peach harvest time, the disease incidence of the untreated control plot was 27.4 to 38.1%, while the disease incidence was 9.7 to 31.8% when Bordeaux mixture was sprayed. The control value ranged from 16.5 to 64.6%. Occurrence of the fruit disease was similar to that of the leaf disease. Incidence of the fruit disease in the untreated control was 17.2 to 21.6%, but incase of the chemical treatment, it was 5.0 to 12.2 %, showing 41.9 to 70.9% of the control value. Chemical injury on peach leaves were not found in the 4-12 and 408 types, but occurred in some degrees in the 6-6 type of Bordeaux mixture.

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Effect of Potassium Phosphonate on the Control of Potato Basal Stem Rot(Pythium myriotylum) in Hydroponics (아인산염을 이용한 감자 줄기기부썩음병 방제)

  • Hong, Soon-Yeong;Kang, Hyeong-Sik;Kang, Yong-Kil;Jee, Hyeong-Jin
    • Research in Plant Disease
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    • v.10 no.2
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    • pp.142-144
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    • 2004
  • Effect of potassium phosphonate on control of potato basal stem rot caused by Pythium myriotylum in hydroponics system was evaluated at spring and fall cultivation in Jeju island in 2001. Potassium phosphonate 200 ppm treatment, which was directly supplemented into the nutrient solution, showed 90.5%, and 100 ppm treatment showed 50.5% control value in spring cultivation. Fall cultivation, potassium phosphonate 200 ppm treatment showed 100%, and 100 ppm treatment showed 69.9% control value. Potassium phosphonate 200 ppm treatment, basal stem rot of potato started to develop 10 days ofter inoculation into the hydroponics system showed 8.0% in infection rate. Potassium phosphonate 100 ppm treatment, after 5 days showed 10.0%, and after 10 days showed 20.0% infection rate, but the non-treated was after 5 days showed 56.7%, and after 10 days showed 96.9% infection rate.

Occurrence of Barley Virus Diseases in Southern Part of Korea (국내 남부지역의 맥류 바이러스병 발생 현황)

  • Bae, Ju-Young;Kim, Sang-Min;Kang, Mi-Hyung;Kim, Kang-Min;Lee, Joong-Hwan;Ju, Ho-Jong;Kim, Sun-Lim;Lee, Bong-Choon
    • Korean Journal of Organic Agriculture
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    • v.23 no.4
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    • pp.859-866
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    • 2015
  • Virus disease surveys on barley cultivation areas in Jeonnam Jeonbuk Gyungnam Gyungbuk-do were conducted during 2014-2015. In this study, we detected Barley yellow mosaic virus (BaYMV), Barley mild mosaic virus (BaMMV) and Soil-borne wheat mosaic virus (SBWMV) by RT-PCR from barley leaves. These viruses are of great economic importance for wheat and barley, causing significant quantitative and qualitative losses in yield. The result of investigation showed that the field incidence of BaYMV in Buan, Gimje was more than 90% in 2014. The infection field rate of barley virus including Boseong, Gangjin, Haenam, Jangheung in Jeonnam was ${\approx}$ 30%. In 2014, double infections by BaYMV and BaMMV was detected in Boseong, Gangjin, Haenam and Jangheung. Only as a low rate BaYMV occurred in various fields of Jeonbuk in 2015. At the same time high infection field ratio of 70% was observed in Gunsan. Also in Yeonggwang was double infection of BaYMV and BaMMV. BaYMV occurred single infection has been confirmed in all of the study area of Gyungbuk and Gyungnam except for Goseong during the investigation period.