• Design & Manufacturing
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• v.7 no.1
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• pp.23-27
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• 2013

Orchard sprayers, wide area dusters and multipurpose control cars are flagship products of Hansung T&I Ltd. Spray pumps are one of the essential parts for these products. But conventional belt pulleys for spray pumps are heavy and expensive, and they bring down the quality as well as productivity of the end-products. Therefore, this study focuses on mold design for aluminum die casting belt pulley and mold manufacture.

• Journal of Species Research
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• v.6 no.spc
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• pp.148-151
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• 2017

Assocations of wingless mites with winged arthropods highlight important life history strategies and ecological interactions. Here we report a mesostigmatan mite species association with an earth-boring dung beetle. Mite spciemens were collected from the soil of organic apple orchards in the Province of Gyeongsangbuk-do, Republic of Korea, and cattle dung was collected from grassland in Mongolia. The species was identified as Alliphis necrophilus Christie, 1983 (Acari: Eviphididae). This is the first report of any species in the genus Alliphis in Korea. Some descriptive details and ecological remarks are also provided.

• The Plant Pathology Journal
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• v.15 no.6
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• pp.340-344
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• 1999

Fungicide-resistant isolates of Monilinia fructicola grew readily on media amended with 0.1, 1.0, 10, 100 and $1,000\mu\textrm{g}$ a.i./ml of carendazim, benomyl, or thiophanate-methyl. However, sensitive isolates did not grow on media amended even with $0.1\mu\textrm{g}$ a.i./ml of carbendazim, $1.0\mu\textrm{g}$ a.i./ml of benomyl or thiophanate-methyl. The fitness compositions including mycelial growth on fungicide-free medium, sporulation on fungicide-free medium and pear, and virulence on pear were not different between resistant and sensitive isolates. The resistant isolates persisted carbendazim resistance during multiple subdulturing and long term storage. The competitive ability of resistant isolates obtained from peach orchards in Korea was similar to those of sensitive isolates.

• Plant Disease and Agriculture
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• v.5 no.1
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• pp.50-54
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• 1999

Leaf blight outbreak was investigated in sweet persimmon tree orchards in Korea during a three-year period from 1995 to 1997. The man percentage of sweet perismmon leaves blighted by Pestalotiopsis theae was 15.9%. The highest disease incidence was surveyed to 20% in Milryang. The disease began from early June to late October, and peaked in September and October. The lesion size on leaf ranged mainly 1-3 cm. The typical symptoms were large grayish concentric lesions of oval patterns of either mesophyll or margin of the leaf, and olde trees were more susceptible than younger ones.

• Research in Plant Disease
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• v.24 no.2
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• pp.113-122
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• 2018

Ripe rot, Botrytis storage rot and Sclerotinia rot are major fungal diseases that lead to deterioration of fruit quality in Korea. Ripe rot, which is caused by Botryosphaeria dothidea, affects harvested fruits during post-storage ripening, while Botrytis storage rot, caused by Botrytis cinerea, affects harvested fruits during cold storage, and Sclerotinia rot, caused by Sclerotinia sclerotiorum, mainly affects immature fruits on the trees. Major fungal fruit rots tend to affect yellow- and red-fleshed cultivars of kiwifruit more severely because of the sharp increase in their cultivation acreage in recent years in Korea. In this review, we summarize symptoms and epidemiological characteristics of the major fungal fruit rots and propose integrated management methods of the diseases that can be practically utilized at the farmers' orchards in order to prevent the diseases based on our research works and field experiences and the research works of others conducted during the last three decades worldwide.

• Proceedings of the Korean Society of Life Science Conference
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• 2008.10a
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• pp.69.1-69.1
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• 2008

• Journal of Biosystems Engineering
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• v.28 no.6
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• pp.505-510
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• 2003

In Korea, due to its broad efficacy as a systemic insecticide, imidacloprid has been widely used in rice paddies to control sucking insects, soil insects, and some chewing insects and in apple orchards to control various insects pests. To quantify the imidacloprid residue concentrations, samples are assayed in vitro using enzyme-linked immunosorbent assays(ELISA). These assays generally require several hours to perform. As a biosensor, a competitive imidacloprid ELISA was modified to measure insecticide concentrations. It was found that a total assay time of 15 min(10-min antibody-antigen binding, and 5-min substrate development) is sufficient for monitoring imidacloprid concentrations. Further work is needed to improve the sensitivity of the measurement protocol.

• Food Science and Preservation
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• v.7 no.1
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• pp.51-56
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• 2000

Quality characteristics of Satsuma mandarin (Citrus unshiu Marc.var.miyagawa) harvest on early December according to production areas and sea level altitude of Cheju were investigated. Soluble solids and flesh ratio were distributed 9.32∼12.50, 75.95%-81.3 in citrus fruits harvested in orchards located below 10m sea level altitude (lower area), and was 10.23-12.17 , 77.35%-80.29% on those over 150m sea level altitude )higher area), respectively. Acid content of citrus juice was 0.95%-1.26% in fruits harvested inlower area, and was 1.02%-1.39% in higher area. In proportion to late harvesting , Brix/acid ratio and fruits quality was improved. Soluble solids of fruits harvested in higher area were higher than those of fruits from higher area, but acid contents were on the contrary . In sensory evaluation on fruit appearance, the differences between two altitudes were not clear.

• Mycobiology
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• v.44 no.1
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• pp.58-62
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• 2016

Extensive disease surveys performed during the summers of 2013 and 2014 in Schisandra chinensis orchards resulted in the finding of a Septobasidium sp. associated with felt disease. The fungus was characterized to be symbiotic with a scale insect (Pseudaulacaspis cockerelli). Morphological and molecular characteristics of the Septobasidium isolates were investigated. The isolates were morphologically and phylogenetically close to S. bogoriense. We tentatively describe this isolate as a Septobasidium sp., mainly because of the limited amount of information available on the internal transcribed spacer region of the ribosomal DNA of Septobasidium spp.

• The Korean Journal of Mycology
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• v.42 no.3
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• pp.183-190
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• 2014

Apple blotch is a major apple disease and recently it causes critical economic losses in apple orchards in Korea. In this review, we described the history of apple blotch researches, ecology and life cycle of Marssonina coronaria, cultural and molecular characteristics and simple isolation method as well. Furthermore, characteristic of apple blotch like symptoms, its cause still unknown, occurs frequently in cv. "Fuji" was described in detail.