• Asian Journal of Turfgrass Science
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• v.25 no.2
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• pp.237-242
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• 2011

The 2011 Japanese Society of Turfgrass Science was divided in oral presentation, sectional meeting and small symposium, and the total 55 subject was announced. The oral presentation was reported physiological ecology of turf, disease and weed; field management; pesticidal activity and spectrum of new turf pesticides. Above all, there was presentation that investigated control method of necrotic ring spot of new turf disease and Cyperus brevifolius, annual bluegrass and mouse-ear chickweed. In addition, the control effect of new registration fungicide (Furametpyr) and herbicides (S-metolachlor, Flucetosulfuron and Foramsulfuron) were announced. There was various information interchange through 4 kinds of subjects of a golf course, ground turf, a urban park greens and ground cover plants greening by the sectional meeting, and the genetic resource of turfgrass discussed by small symposium. Specially, park greens sectional meeting was announced about the radioactive material contaminated on mechanism and effectively removal method of the radioactivity contaminant from public park, school ground and domestic lawn.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.2
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• pp.181-186
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• 2016

This study collected data of college students' volunteering for maritime and fisheries and found that only few subjects participated in it. They took part in control for release of oil, services for sea village and coastal cleansing. Most were satisfied with their volunteering referring contributing to environment protection, self-fulfillment, social interaction, gaining special experiences and assimilation with nature. The subjects were not satisfied with lack of systematic and effective services, monolithic activities, insufficient publicity, deficient rewards and a shortage of self-capacity. Based upon the research findings, implications for college students' volunteering policies were suggested to promote volunteering for maritime and fisheries.

• Korean Journal of Organic Agriculture
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• v.15 no.1
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• pp.109-121
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• 2007

For developing standard method for diease, pest and weed control in environmental friendly 'Ssam' vegetable cultivation, this study was carried out to investigating agriculture material use in organic agriculture and no pesticide cultivation for lettuce, kale, leafy perilla and korean cabbage. The 28.6% of investigated farmer carried out seed sterilization by seed selection with salt solution and soaking in chitosan that not validated. For raising seedling periods, the 55.6% of farmer did not use environmental-friendly agriculture material for, diease control and the 50% of farmer used one time for. pest control. Therefore, the control of disease and pest could be achieved with one or two times use of environmental-friendly agriculture material. Seed sterilization was carried out by soil solar sterilization, one time per year in 71.4% of farmer. Weed was controled by black PE film for weed germination of furrow in many farmer, by man-power weeding for weed of ridge in 85% of farmer and by machine weeding and mulching in some farmer. During cultivation period, the major pest were Aphis gossypii in lettuce, Plutella xylostella in kale, Plutella xylostella and Phyllotreta striolata (Fabricius) in korean cabbage and Pyrausta panopealis (Walke) in feat perilla. The many farmers used environ-mental-friendly agriculture material for control of pest over 10 times for spring season, and more used sold materials in market than home-made materials. In result, it needs to develop standardized method and validate cultivation methods for control of disease and pest, and seed sterilization treatment environmental-friendly 'Ssam' vegetable.

• Korean Journal of Poultry Science
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• v.47 no.4
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• pp.211-217
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• 2020

This study evaluated calcium hydroxide (slaked lime) and a combination of plant extracts ('natural product'; clove, cinnamon, and saponin; 1:1:1 ratio) as acaricidal control mechanisms for poultry red mites. Red mite susceptibility was evaluated after treatments with 10% slaked lime, 20% slaked lime, and 1% natural product. The duration of the acaricidal effect was also tested at 0, 10, 30, and 60 min after treatment using 20% slaked lime, 1% natural product, or a mixture of both. In the in vitro experiment, the slaked lime treatments were 73.2% (10% slaked lime) and 85.1% (20% slaked lime) effective on red mites. In acaricidal effect of control materials over times, with 20% slaked lime, the acaricidal effect decreased to 50.7% after 30 min, and 12.7% after 60 min (P<0.05). With 1% natural product, there was no acaricidal effect after 30 min (P<0.05). With 20% slaked lime +1% natural product, all of poultry red mites died until 30 min, and 92.9% after 60 min (P<0.05). On the farm, poultry red mites were observed that the number of poultry red mites increased 7,923 from 36 to 45 weeks, but then decreased to 483 after 20% slaked lime plus 1% natural product treatment. These results indicate that combining slaked lime and plant extracts effectively control poultry red mites.

• Research in Plant Disease
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• v.25 no.3
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• pp.124-130
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• 2019

The study was conducted to investigate the infestation and distribution of plant-parasitic nematodes on Chinese yam (Dioscorea batatas) in Andong, Korea. Root-knot nematodes, Meloidogyne incognita was the most prevalent nematode species which is found from 43 yam fields (81.1%) with high population densities (average of 450 juveniles/$300cm^3$). Other nematodes, root-lesion nematode (Pratylenchus spp.) and pin nematode (Paratylenchus spp.) were less problematic. Density of juveniles (J2) of M. incognita was $10\;J2/300cm^3$ by August, then increased to 274 in September and 624 in October. The highest J2 density was found at the soil depth between 40 and 50 cm ($1,840\;J2/300cm^3$). M. incognita was able to infest yam tuber down to a depth of 70 cm and developed galls outside and brown spots inside. The highest number of females were found at 40-50 cm (79 females/10 cm piece) tuber from the top.

• Journal of Practical Agriculture & Fisheries Research
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• v.22 no.1
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• pp.131-142
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• 2020

Chrysnathemum stunt viroid (CSVd), a small, single-stranded, infectious RNA, has caused a severe problem in chrysanthemum in the world. In Korea, since CSVd was firstly observed in 1997, the disease has been spread throughout the whole country rapidly. In spite of the seriousness, few methods for control of CSVd have been known without prevention. The use of resistant cultivars is one of the most efficient approaches for overcoming CSVd disease in chrysanthemum cultivation. This study was carried out to identify chrysanthemum genetic resources for the resistance to chrysanthemum stunt viroid (CSVd). A total of 192 commercial cultivars including 167 spray and 25 standard chrysanthemum were screened with CSVd through grafting inoculation method. In most of the inoculated cultivars, typical disease symptoms, stunting of plant height, reduced flower size, and flower color bleaching, were induced. Several cultivars, however, were symptomless or showed delay in symptom expression. Of 192 chrysanthemum cultivars, two cultivars with less than 5% of the average reduction rate of plant height, 'Chiwerel' and 'Jeongheungdaesin', were rated as resistant. And six cultivars less than 20% inculding 'Inga' were rated as moderate resistant. The remaining 184 cultivars with a high level of reduction were rated as susceptible. We expect that these genetic resources can be used in crossbreeding programs for developing CSVd resistant cultivars of chrysanthemum.

• Proceedings of the KGS Conference
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• 2003.11a
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• pp.24-28
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• 2003

장기간에 걸친 지형변화를 예측하는 것은 기초과학뿐만 아니라 응용과학 및 해양 공학적인 측면에서 볼 때 매우 중요하다. 퇴적물 이동과 지형변화의 예측은 항만의 수로를 유지하고, 폭풍에 의한 침식을 방제 할 뿐 아니라 지질학적 time-scale에서 퇴적층 형성을 이해함으로서 경제적으로 유용한 석유자원 매장을 밝히는데 도움을 준다. 그렇지만 퇴적역학에 대한 이해가 불충분하고 지형환경 system이 복잡하기 때문에 퇴적물 이동 및 지형변화에 대한3차원 모델을 통한 지형 변화 예측을 실용적으로 사용하기에는 불충분하다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.10a
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• pp.80-81
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• 2002

근년 Cochlodinium polykrikoides 적조는 막대한 경제적 피해를 입히고 있으며, 이의 방제를 위하여 우리나라에서는 황토살포와 살조세균 등에 관한 연구가 진행되어 왔으나 이 적조 발생시 양식어 폐사 등 수산업의 피해는 여전히 반복되고 있다. 우리나라에서 C. polykrikodes 적조로 인하여 양식어가 폐사하였을 때에는 전량 폐기하고 있어 수산자원의 효율적 이용이라는 측면에서 큰 손실이라 아니할 수 없다. (중략)

• Landscaping Tree
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• s.109
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• pp.23-24
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• 2009

두릅나무는 낙엽활엽수로 맛과 향이 독특하여 어린순은 나물, 찜, 튀김 등 식용으로 뿌리는 관절염, 위암, 당뇨병, 감기, 두통 등의 약용으로 쓰이는 봄철 대표적인 생물자원이며, 재배하기도 비교적 수월하고 재배를 통해 높은 소득을 올릴 수 있는 유망한 특용수종이다. 하지만 야생상태에서는 크게 문제가 되지 않았으나, 재배면적이 늘어나고 집단적으로 재배하면서 역병 피해가 발생되어 두릅나무에 큰 장애 요인으로 발생되고 있는 실정이다. 역병은 토양전염성 병해로 약제 방제가 어렵고, 병이 발병되면 치료가 거의 불가능한 병해로 특히, 병이 발생되지 않도록 관리에 신경을 써야한다.

• Journal of Ginseng Research
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• v.26 no.2
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• pp.89-95
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• 2002

We screened biotic and abiotic preventative,i(preventers) from natural resources to prevent the rusty phenomenon in ginseng roots. To select preventatives(preventers), soil microbes such as Agrobacterium and certain microbes isolated from the rusty ginsengs and the soil in which the rusty ginsengs were planted and used. It is also performed with germination tests of the seeds of Latuca Sativa L. We identified that how selected preventatives(preventers) effect the germination of ginseng seeds. Furthermore, how these influence on the rusty phenomenon and the growth of 1 -year-old ginsengs treated in the pavement. The final preventatives; ICPE-C1$\sub$05/, ICPE-P$\^$107/ were effective in not only the growth of ginseng, but also inhibition of the rusty phenomenon. Moreover, we selected abiotic soil improvers; called P, R, and W, respectively; to promote the effects of preventatives. R and W was excellented among choring improvers. The germination rate of 2-year-old ginsengs treated with ICPE-C$\sub$105/P, and ICPE-P$\sub$107/P was the highest under the effects of naturally selected preventatives mixing with abiotic soil improvers. All treat which was compounding preventers & improvers were so excellented of growth ginseng. Especially treats of ICPE-C$\sub$105/R and ICPE-P$\sub$107/R showed growth increased of each 67.3% and 52.7% As well, the growth of ginseng was the highest in the treatment of ICPE-C$\sub$105/R, and ICPE-P$\sub$105/R. Though rusty of rate was emerged 35% in control, preventers ICPE-C$\sub$105/R and ICPE-P$\sub$107/R were emerged 5.3%. It was affirmed effective of preventer. On the other hands, amounts of ginsenoside treated with preventatives showed to be changed. The ginsenoside was increased to 14.2% with treatment with ICPE-P$\sub$107/R which is highest among groups compared to control, and ICPE-C$\sub$105/P was increased to 5.0%. To sum up with total results, it is judged that biotic preventatives (ICPE-C$\sub$105/R, and ICPE-P$\sub$107/R) which we created improve both a high yield of ginseng and the inhibition of the rusty phenomenon. phenomenon.