• Journal of Korean Society of Rural Planning
• /
• v.29 no.2
• /
• pp.55-65
• /
• 2023

This study was performed with 473 dwellers living in the cities, to study how purchasing intention was affected by the Korea important agricultural heritage system designation on Changwon sweet persimmon farming. This study identified the relationship between consumption value and purchase intention through Sheth's theory of consumption value. Functional, social, emotional, epistemic and symbolic values were all found to have a positive (+) effect on purchase intention, and among them, symbolic value properties were found to have the greatest impact. This study presents an important implication that emphasizing symbolism is most effective when establishing policies in the direction of promoting persimmon consumption in the Changwon area designated as Korea important agricultural heritage system.

• Biomedical Science Letters
• /
• v.26 no.2
• /
• pp.85-92
• /
• 2020

Various beneficial effects of sweet persimmon (Diospyros kaki T.) including anti-oxidation, anti-bacteria and viruses, anti-allergy were widely reported previously. However, the anti-inflammatory effect and its molecular mechanisms are not clear. In this study, the anti-inflammatory effect of the extracts of flower bud and fruit of sweet persimmon was investigated in LPS-treated RAW264.7 cells. Both extracts of flower bud and fruit showed strong inhibitory effect on the LPS-induced NF-κB activation. IκBα, the inhibitor of NF-κB, was increased and the expressions of NF-κB target genes, COX-2 and iNOS, were suppressed by the treatment with the extracts of flower bud and fruit. The expressions of pro-inflammatory cytokines, IL-1β, IL-6, TNF-α were also suppressed by the extracts. In addition, the LPS-induced wnt/β-catenin pathway and its related gene expressions including cyclin D1, wnt 3a, wnt 5a were suppressed by the extracts. The extracts also showed anti-oxidant activity and suppressive effect on the LPS-induced apoptosis of RAW264.7 cells. These results suggest that the flower bud and fruit of sweet persimmon display strong anti-inflammatory effect through inhibiting the pro-inflammatory signaling pathways in the cells.

• Journal of Korea Multimedia Society
• /
• v.24 no.10
• /
• pp.1358-1368
• /
• 2021

A research on agricultural automation is a main issues to overcome the shortage of labor in Korea. A sweet persimmon farmers need much time and labors for classifying profitable sweet persimmon and ill profitable products. In this paper, we propose a mixed two-step synthetic neural network model for efficiently classifying sweet persimmon images. In this model, we suggested a surface direction classification model and a quality screening model which constructed from image data sets. Also we studied Class Activation Mapping(CAM) for visualization to easily inspect the quality of the classified products. The proposed mixed two-step model showed high performance compared to the simple binary classification model and the multi-class classification model, and it was possible to easily identify the weak parts of the classification in a dataset.

• Journal of Korea Multimedia Society
• /
• v.25 no.6
• /
• pp.769-782
• /
• 2022

A study on agricultural automation became more important. In Korea, sweet persimmon farmers spend a lot of time and effort on classifying profitable persimmons. In this paper, we propose and implement an efficient grading algorithm for persimmons before shipment. We gathered more than 1,750 images of persimmons, and the images were graded and labeled for classifications purpose. Our main algorithm is based on EfficientDet object detection model but we implemented more exquisite method for better classification performance. In order to improve the precision of classification, we adopted a machine learning algorithm, which was proposed by PyCaret machine learning workflow generation library. Finally we acquired an improved classification model with the accuracy score of 81%.

• Mycobiology
• /
• v.32 no.2
• /
• pp.98-101
• /
• 2004

A fruit soft rot caused by Mucor piriformis occurred on sweet persimmon storages in Jinju, Changwon and Gimhae, Gyeongnam province, Korea, 2003. The disease infection usually started from wounding after cracking of fruits. At first, the lesions started with water soaked and rapidly softened and diseased lesion gradually expanded. Colonies on potato dextrose agar at $20^{\circ}C$ were whitish to olivaceous-buff Sporangia were globose, black and $96{\sim}153{\mu}m$ in size. Sporangiophores were $26{\sim}42{\mu}m$ in width. Sporangiospores were ellipsoid and $5.8{\sim}10.6{\times}4.3{\sim}7.6{\mu}m$ in size. Columella was obovoid, cylindrical-ellipsoidal, pyriform, subglobose and $80{\sim}125{\mu}m$ in size. Optimal temperature for mycelial growth was $20^{\circ}C$ on PDA. The causal organism was identified as M. piriformis. This is the first report of fruit soft rot on sweet persimmon caused by M. piriformis in Korea.

• Journal of Korean Society of Rural Planning
• /
• v.30 no.2
• /
• pp.35-50
• /
• 2024

Dokmoe persimmon system in Changwon, designated as a Korea National Important Agricultural Heritage System is a unique agricultural heritage system, is a farming system carried out in the sloping semi-mountainous terrain of the low hills downstream of the Nagdong River. In this study, we analyzed the proposal submitted for registration by the orchard region GIAHS and analyzed the regional characteristics, agricultural characteristics, and threats to heritage conservation of Dokmoe persimmon system. Dokmoe persimmon system is located in a large city, so the threat of development was analyzed as a threat factor differentiated from other regions, and the development of the processing industry was analyzed as a common initiative for GIAHS in the orchard area. Based on this, we established a action plan for heritage conservation. The action plan consists of 4 main criteria, 6 plans, and 14 initiatives. Research on Dokmoe persimmon farming is now at the starting point, and this study will be able to contribute to registration of Dokmo persimmon system in GIAHS.

• Journal of Life Science
• /
• v.30 no.7
• /
• pp.614-624
• /
• 2020

The recent development of next-generation sequencing technology has enabled increased genomic analysis, but very few single nucleotide polymorphism (SNP) markers applicable to sweet persimmon (Diospyros kaki Thunb.) cultivars have been identified. In this study, SNP primers developed from five pollination-constant astringent (PCA) persimmons native to Korea were applied to discriminate between cultivars and verify their usability. The polymerase chain reactions of 19 SNP primers developed by Jung et al. were checked, with 11 primers finally selected. The other eight were very difficult to analyze in the agarose gel electrophoresis and QIAxcel Advanced System used in this experiment and were therefore excluded. The 11 SNP primers were applied through first and second verification to 76 cultivars and collection lines including 20 pollination-variant non-astringent (PVNA), 30 pollination-constant non-astringent (PCNA), 20 PCA, and six pollination-variant astringent (PVA). Of these, 38 were indistinguishable (eight PVNA, 18 PCNA, nine PCA, and three PVA). However, the results of applying the 11 SNP primers to new sweet persimmon cultivars, namely Gamnuri, Dannuri, Hongchoo, Jamisi, and Migamjosaeng, showed that they have the potential to be used as a unique marker for simultaneously determining between them.

• Research in Plant Disease
• /
• v.10 no.3
• /
• pp.183-187
• /
• 2004

Black spot disease on sweet persimmon (Diospyros kaki cv. Fuyu) was found from the farmer's refregerated ware house located in Dong-eup, Changwon city, Gyeongnam province, Korea, 2002. The typical symptoms of the disease was appeared black spot on surface of fruits. Colonies of causal fungus were developed velvety and later turned olivaceous black to sooty black in color on PDA. Conidia were pale brown to golden brown in color and ovoid, obclavate to obpyriform, rarely ellipsoid in shape. and were 12∼46 ${\times}$ 6∼12 ${\mu}{\textrm}{m}$ in size. Septa were 3∼5 transvers, 1∼2 longitudinal or oblique. Conidia were mostly beakless and generated chains by means of secondary conidiophores. Conidiophores were pale to mid brown in color and 42∼95 ${\times}$ 3∼5 ${\mu}{\textrm}{m}$ in size. The optimum temperature for growth of the fungus was about 25∼3$0^{\circ}C$. This is the first report on the black spot of sweet persimmon caused by Alternaria alternata (Fr.) Keissler in Korea.

• Korean journal of applied entomology
• /
• v.43 no.2
• /
• pp.103-109
• /
• 2004

Seasonal occurrence of Japanese gall-forming thrips, Ponticulothrips diospyrosi Haga et Okajima, and its damage pattern on leaves and fruits were studied at sweet persimmon orchards in Gimhae (orchard A, B) and Changwon, Gyeongnam. Korea in 2002 and 2003. Monitoring adults by yellow sticky traps and inspecting each developmental stage in damaged rolled-leaves revealed that the overwintered adults moved to sweet persimmon orchard from late April to late May, and oviposited inside the rolled leaves. Adults developed from the eggs showed peak occurrence of the first generation adults in early to mid June. Inspection of rolled leaves indicated that the peak occurrences of eggs, nymphs, and pupae of the first generation took place in early to mid May, late May to early June, and early June, respectively. Each developmental stage showed the second small peaks in the late season. Results suggest that most thrips live a single generation per year, but a small portion may develop to the second generation in persimmon orchards. The percent of damaged leaves was highest in Changwon orchard at 9.7％ in early June. Percentage of damaged fruits increased from 0.84％ in early June to 30.2％ in early September in Gimhae B orchard. It was found that the closer the persimmon trees were to the edge of the orchard, the worse damaged the leaves were. Appropriate timing for incorporation of control measures were discussed in relation to the seasonal occurrence of adults.

• Korean journal of applied entomology
• /
• v.42 no.1
• /
• pp.85-89
• /
• 2003

Current status of pesticide applications in sweet persimmon orchards was investigated through the questionnaire and analysis of the pesticide application records from 62 growers in 2000 and 17 growers in 2001 in Jinju, Sacheon, Changwon, Changyoung, and Gimhae in Korea. Average yearly application was 7.6 times in 2000 and 7.7 times in 2001, concentrated in June and July. The kinds of fungicides and insecticides used were 36 and 34 items in 2000, and 22 and 23 items in 2001, respectively. Application of pesticides was mostly finished by mid-September. Fungicides such as mancozeb, thiophanate-methyl, and benomyl were most frequently used in 2000, and lime sulfur, benomyl and carbendazim in 2001. Insecticides such as deltamethrin, methidathion, and fenitrothion + fenvalerate were frequently used in both years. About one-half of the pesticides being used by the growers was not registered for persimmon in Korea.