• Research in Plant Disease
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• v.19 no.2
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• pp.121-123
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• 2013

The strains of Colletotrichum gloeosporioides, C. coccodes, C. acutatum isolated from black raspberry were pathogenic to apple and strawberry after dropping inoculation, but showed weak pathogenicity in hot-pepper and tomato. The anthracnose pathogens of C. gloeosporioides, C. orbiculare, C. acutatum isolated from apple, hot-pepper and pumpkin showed pathogenicity in black raspberry. Moreover, the anthracnose pathogens isolated from apple caused disease symptoms in non-wounded inoculation.

• Korean Journal of Veterinary Service
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• v.38 no.1
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• pp.51-56
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• 2015

Infectious bronchitis virus (IBV) causes an acute and highly contagious viral disease of chicken that is great economic losses to the poultry industry worldwide. Among the IBV structural proteins, the high rate spike glycoprotein S1 gene mutation and antigenic variant strains have been reported in many countries. During the years 2012~2014, 10 IBV strains were isolated from infected chicken farms distributed in provinces of Jeonbuk. Analysis of the S1 gene sequences amplified from 10 isolated strains with QX strains showed nucleotide homologies ranging from 96.5 to 95.4%. Phylogenetic analysis revealed that all strains were clustered into QX-like groups. This study suggests that QX-like IBVs are circulating in commercial chicken farms in Jeonbuk. Therefore, the continuing survellance is significantly important for prevention and control of BIV infection.

• Korean Journal of Veterinary Service
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• v.41 no.1
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• pp.21-27
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• 2018

Fowl adenovirus (FAdV) and chicken anemia virus (CAV) have gained much importance as an immunosuppressive and economically important emerging pathogen of poultry. This study was carried out to investigate the prevalence of FAdV and CAV infection in chickens. The groups were divided into Korean native chickens, broiler, layer hens and broiler breeder and set up groups according to age. As results, 12.5% of the native chicken, 2.5% of broiler and 6.7% of layer chicken were positive, respectively by PCR for FAdV. Serological test showed that 84.8%, 79.0%, 97.7% and 96.1% of chickens were positive for antibody to FAdV in native chickens, broiler, layer hens and broiler breeder. The prevalence of CAV infection were 20.0%, 7.5%, 16.7% and 10.0%, based on CAV gene detection by PCR. In serological test of CAV, 40.6%, 35.9%, 84.8% and 73.9% of chickens were positive in that groups.

• Korean Journal of Veterinary Service
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• v.37 no.3
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• pp.179-183
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• 2014

Reproductive losses in a herd can be huge. Fetal reabsorption or undefined infertility often remain undetected. Routine herds monitoring for exposure, controlling the introduction of potential agent carriers, appropriate biosafety procedures, and vaccination where possible are together the best security against abortion and stillbirth inducing disease. For biosecurity of local farms, we performed antibody titers of abortion and stillbirth related diseases such as bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis virus (IBRV), Neospora caninum, Toxoplasma gondii and Campylobacter fetus subsp venerealis. The blood samples were collected from 500 female Hanwoo over 1 year old of 100 farms in Jeonbuk eastern area. Champhylobater serological test was evaluated by the standard tube agglutination test (STAT) and other pathogen's antibodies were detected by indirect-enzyme linked immunoassay (I-ELISA). The seroprevalence of abortion and stillbirth inducing disease were BVDV 72.4%, IBRV 13.0%, N. caninum 1.2%, T. gondii 10.4% and C. venerealis 0.6%, irrespectively.

• Journal of Korean Society on Water Environment
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• v.22 no.1
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• pp.66-73
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• 2006

The purpose of this study was done to evaluate degradation characteristics of non-biodegradable organic matters including aromatic compounds in livestock wastewater using CFZ process. The CFZ process is consisted of coagulation/sedimentation, Fenton oxidation and zeolite adsoption process. degradation charateristics of each treatment water including livestock wastewater were analyzed by UV scanning, FT-IR and GC/MS. After coagulation/sedimentation process as 1st treatment, non-biodegradable matters remained after 1st treatment were removed by using OH radical produced in Fenton oxidation process. As a result of treatment using these processes, NBDCOD removal efficiency was over 90%. Increase of $E_2/E_3$ ratio (absorbance at 250 and 365 nm) in each treatment water means that aromaticity of livestock wastewater decreased. In case of GC/MS, most aromatics or polynuclear aromatics like benzene, phenol and scatol in livestock wastewater almost wasn't detected after oxidation using OH radical.

• Korean Journal of Veterinary Service
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• v.47 no.1
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• pp.9-17
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• 2024

Porcine epidemic diarrhea (PED) is a highly contagious enteric viral disease of pigs with watery diarrhea in piglets, which ultimately results in huge economic losses in the swine industry. The spike (S) protein plays an important role in viral pathogenicity, tissue tropism, infection, dissemination and the trypsin-dependent proliferation of the PED virus (PEDV). In the present study, we determined the full-length spike (S) gene sequences of twenty PEDV field strains detected in Jeonbuk province in 2022. Phylogenetic analysis showed that the twenty PEDV field strains were classified into G2b group and shared 98.6~100% of nucleotide homology and 97.4~100% of amino acid homology with each other. Mutations of amino acid sequences on the neutralizing epitope of S protein were observed in the twenty field strains compared to the previous vaccine strain SM-98-1 (G1a group). Therefore, these amino acid mutations in the PEDV S protein may result in a new genotype of the virus and highly pathogenic virus, so continuous monitoring is required.

• Korean Journal of Medicinal Crop Science
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• v.12 no.6
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• pp.473-477
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• 2004

Wasabis (Wasabia japonica Matsum.) have been used as a spice with its petioles and rhizomes, but the production of its rhizomes in upland cultivation was very difficult for the severe damage of rotting disease during summer season. This experiment was carried out to increase the yield of marketable rhizome in wasabi when cultured in upland. Seedlings were raised in sub-alpine area for 7 and 12 months and then transplanted to experimental area on Sept. 20 and the yield was investigated on May 12 of the next year. The marketable rhizome(above 40g/plant) was produced in seedlings raised for 7 months. Production rate of marketable rhizome was 13.3% and total yield was 72.9 kg/10a. The content of allylisothiocyanate in rhizome of upland wasabi was 0.777 mg/g and its content was equal to wasabi cultured in water condition for 18 months. These results suggested that the upland cultivation of wasabi seedlings raised in sub-alpine area for 7 months was possible to product marketable rhizome.

• Journal of Mushroom
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• v.11 no.1
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• pp.15-20
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• 2013

This study was performed to obtain the scientific data an artificial culture of ear mushroom(Auricularia auricula). Liquid cultural of Auricularia auricula. mycelium was characterized with respect to temperature, pH, compositions of inorganic, carbon and nitrogen. The its optimum temperature and media pH were at $25^{\circ}C$ and pH 5.0~6.0 on the mycelial growth, respectively. The optimum inorganic compositions and concentration for mycelial growth were $MgSO_4$ 0.05%(w/v) and $KH_2PO_4$ 0.1%(w/v), respectively. The optimum carbon sources and nitrogen sources were black-sugar 2%(w/v) and soybean powder at 0.3~0.5%(w/v) with7 days optimum culture time.

• Research in Plant Disease
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• v.21 no.1
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• pp.32-35
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• 2015

Anthracnose occurred in bitter gourd grown in Jeongup areas of Korea in 2011. Anthracnose of bitter gourd appeared as dark brown circular spots on naturally infected leaves and fruits. The symptoms of infected leaves and fruits were small brown to dark brown spots and gradually enlarged to larger cylindrical dark brown lesions. The causal fungus of anthracnose isolated from the diseased plants was identified as Colletotrichum gloeosporioides based on the morphological and cultural characteristics and ITS rDNA sequence analysis. All isolates of C. gloeosporioides produced symptoms on the host leaves by artificial inoculation. This is the first report of anthracnose on bitter gourd caused by C. gloeosporioides in Korea.

• Research in Plant Disease
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• v.21 no.1
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• pp.6-11
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• 2015

This study was carried out to develop control thresholds for anthracnose on red pepper. To investigate relationship between anthracnose incidence and diseased fruits, experimental plots with six treatments were established. There existed close correlation between rate of diseased fruits and yields in field (Y = -16.83X + 327.57, $R^2=0.83$), in rain shelter (Y = -4.92X + 361.02, $R^2=0.84$), and in rain shelter with rain (Y = -5.91X + 359.71, $R^2=0.76$). Control thresholds for anthracnose of pepper were 0.9% diseased fruits per plant in field and from 1.7 to 2.3% diseased fruits rate per plant in rain shelter.