• Journal of Mushroom
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• v.10 no.4
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• pp.167-173
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• 2012

This study was carried out to test the recycling post-harvest medium from other mushroom bottle cultivation as a secondary medium of the oyster mushroom. In the post-harvest medium from winter mushroom and king oyster mushroom cultivation, oyster mushroom varieties in Chunchu-2ho and Manchuri fruit bodies yields compared with control group tend to be low. After recycling the post-harvest medium, it was replaced by basal medium up to 50%, of which the fruit bodies with stable yield increase from 10% to 30% were increased.

• Journal of Food Hygiene and Safety
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• v.27 no.4
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• pp.388-394
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• 2012

The present study was carried out to assess the dietary exposure and the risk for arsenic (As) and mercury (Hg) through mushrooms intake. Various samples (n = 536) covering 17 kinds of mushrooms were collected from retail outlets and markets in Korea. The contents of As were 0.003 (King oyster) ~ 1.952 (Matsutake) mg/kg in raw mushrooms and 0.015 (Fuscoporia obliqua) ~ 16.95 (Matsutake) mg/kg in dry mushrooms, respectively. The contents of Hg were 0.001 (King oyster) ~ 0.030 (Matsutake) mg/kg in raw mushrooms and 0.004 (Oyster) ~ 0.588 (Matsutake) mg/kg in dry mushrooms, respectively. The mean dietary exposures of As was $0.151{\mu}g$/day, taking 0.005% of provisional tolerable weekly intake (PTWI). The mean dietary exposures of Hg was $0.022{\mu}g$/day, corresponding to 0.071% of PTWI. Therefore, the level of overall dietary exposure to As and Hg for Korean population through mushroom was far below the levels recommended by Joint FAO/WHO Expert Committee on Food Additivies, indicating little possibility of concern.

• Journal of Mushroom
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• v.17 no.4
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• pp.224-229
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• 2019

The two most common mushroom species grown in Korea are pearl oyster mushroom (Pleurotus ostreatus) and king oyster mushroom (P. eryngii). In recent years, the production of king oyster mushroom greatly increased due to the automation of the cultivation facilities, and it became a major export mushroom owing to its excellent shelf life. However, the increase in the production of king oyster mushroom led to a decline in its market price; thus, necessitating the development of new mushroom species that could replace king oyster mushroom, to diversify the mushroom market for the benefit of both, the producers and the consumers. The Mushroom division at the National Institute of Horticultural & Herbal Science (NIHHS) reported the development of a new interspecific hybrid between P. ferulae and P. tuoliensis, referred to as 'Creamy.' Two parental strains KMCC00430 (Bisan2ho, P. ferulae) and KMCC00461 (P. tuoliensis) were selected based on the results of genetic resource analysis, and their monokaryons were collected. About 1,000 Mon-Mon crosses were performed and 73 of them were selected. Following repeated cultivation tests and strain analyses, we selected strain 7773, which had a bright creamy pileus and a thick straight stipe, and named it 'Creamy.' Optimum temperature for mycelial growth of Creamy was 25-30℃, and that for fruiting body growth was 16℃. The pileus, which had a brighter creamy color, was small in size with a diameter of 61.2 mm. Although it was cultivated in suboptimal conditions, such as low temperature and high CO₂ concentration, Creamy was characterized by its straight and smooth stipe. Field production tests and further analyses indicated that the yield of Creamy was 5% higher than that of Baekhwang. It is expected that Creamy, the new interspecific hybrid with a bright creamy pileus and a pleasant flavor, will help create new opportunities for mushroom farmers and diversify the mushroom market.

• Journal of Mushroom
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• v.12 no.4
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• pp.280-286
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• 2014

King oyster mushrooms(Pleurotus eryngii) are the second biggest mushroom for exporting in Korea but their browning and soft rot is the main factors of claim during long distance transportation. Fresh king oyster mushrooms were treated with $CO_2$ at 30, 50% for 3 hours at $5^{\circ}C$ prior to storage at $20^{\circ}C$ and $5^{\circ}C$. There was no difference on respiration rate after $CO_2$ treatment. However exposure to $CO_2$ for 3h prior to MA packing maintained the firmness and delayed color(hunter L and b value) change of mushrooms during storage. Especially an incubation in high $CO_2$ at 30% significantly reduced soft rot and browning symptoms resulting in one week extension of shelf-life during storage at $5^{\circ}C$ compared to control and 50% $CO_2$ treatment.

• Journal of Mushroom
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• v.13 no.3
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• pp.199-202
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• 2015

The purpose of this study is to address a current mushroom export situation in Gyeongbuk area for establishing exports strategy, and policy of mushrooms export. Mushroom industry has made a rapid growth over the past 20 years in Korea. Gyeongbuk province exports volume of enoki and king oyster mushrooms account for about half of the country, enoki and total exports in 2009, and 81%, increased to 14% in 2010 and 2010, the maximum exports (9,415 tons) and the maximum exports (14,840 grand)was recorded. But, enoki and total exports in 2011, and -15%, decreased to -19% in 2012, and increased to 32% in 2013, 1% in 2014. King oyster mushroom to represent the Netherlands in Europe, exports were higher exports to China is negligible. In the case of China in 2001, 5 spots automated mushroom factory, production, but only 8,000 tons in 2011, 652 mushroom factory, production of 1,100,000 tons and in 2012, 788 mushroom factory, production of 1,520,000 tons quickly grew.

• Korean journal of applied entomology
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• v.53 no.4
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• pp.367-373
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• 2014

In order to investigate the impact of recycling agricultural wastes as feed for mealworm (Tenebrio molitor), we evaluated the replacing effect by the different level of tangerine shell, Chinese cabbage, king oyster mushroom (Pleurotus eryngii) and Enoki mushroom (Flammulina velutipes) substrates on wheat bran feed. Larval survival rate, larval weight, developmental period of larva, pupation rate and pupal weight were evaluated. In tangerine shell and Chinese cabbage replacement group, no replacing effects found. In all groups replacing by spent King oyster mushroom (Pleurotus eryngii) substrate, survival rate of larva was similar to that of control group but larvae weighed less than control group significantly. Developmental period of larva increases in the group of King oyster mushroom substrate replacement. Larval and pupal weight in Enoki mushroom (Flammulina velutipes) substrate by the level of 40 and 50%, replacement effect showed best results in successive breeding considering pupation rate. It is concluded that replacing 40 and 50% of Enoki mushroom (Flammulina velutipes) substrate is appropriate to substituted diet of Tenebrio molitor larvae.

• Journal of Mushroom
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• v.4 no.4
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• pp.135-143
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• 2006

We have investigated cultural circumstance and given condition of king oyster mushroom(Pleurotus eryngii) growing farmer. We collected many pathogens from King oyster mushroom growing farmer and identified with chemicobiological test and microscope. Most of investigated farmers neglected their's growing room cleaning and washing, after harvesting At pin-heading induction time, humidity degree in growing room was kept of high level and Air ventilation volume was so little that fruit-body formation ratio was low. The collected pathogens were twenty eight strains and identified with Pseudomonas sp., Trichoderma sp. mostly. During the spawn running time and pin-heading induction time, contamination by Trichoderma sp. occurred mostly, but during the fruit-body growing time, contamination by Pseudomonas sp., Erwinia sp. etc, occurred.

• Journal of Mushroom
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• v.10 no.4
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• pp.191-197
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• 2012

This study was carried out to investigate proper modified atmosphere condition of king oyster mushroom (Pleurotus eryngii) during cold storage and distribution. King oyster mushrooms were divided into two treatments: $1{\mu}L/L$ 1-methylcyclopropene for 20 hours at $0^{\circ}C$ (1-MCP), while the other treatment was left at $0^{\circ}C$ (control). They were packaged with $30{\mu}m$ oriented polypropylene (OPP, $1238.0cc/m^2{\cdot}day{\cdot}atm\;O_2$), and microperforated (MP3, $3179.9cc/m^2{\cdot}day{\cdot}atm\;O_2$) film. Quality and sensory evaluation parameters of weight loss, stem firmness, skin color, off-flavor, overall quality were monitored after 3, and 4 weeks storage at $0^{\circ}C$ and plus 3 days on the shelf at room temperature. 1-MCP treated mushroom packaged with MP3 film kept 3.6~10.9% $O_2$ and 9.0~13.3% $CO_2$ concentration in the bag during storage, and showed high overall quality at 4 weeks storage at $0^{\circ}C$ + 3 days on the shelf at room temperature because of the lowest development of off-flavor, stem discoloration, and cap softening among the treatments.

• Journal of Mushroom
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• v.9 no.2
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• pp.69-73
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• 2011

We have researched on methods which can reduce fruit-body malformations of king oyster mushroom(Pleurotus eryngii). We collected many pathogens from diseased fruit-body or malformated fruit-body and identified with chemicobiological test and microscope. The factors of fruit-body malformations and increment of contamination during the pin-heading induction time were researched with ventilation amounts in growing room. When the pathogens having high pathogenicity were inoculated in spawn running bottle and at pin-heading induction time, symptom appeared or not appeared in according to air ventilation amounts in growing room. During the pin-heading induction time, humidity degree in growing room have kept of high level and air ventilation amounts were so little that fruit-body malformations ratio was high. But, even though pathogens were inoculated at the surface of bottle factitiously, if air ventilation amounts were enough, fruit-body malformation ratio was low.

• Journal of Mushroom
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• v.12 no.1
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• pp.58-62
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• 2014

To develop a new cultivar of King oyster mushroom white variety (Pleurotus ferulae), GW10-68 as parental strain was selected by the method of Di-mon crossing between monokaryotic strain ASI 2798-24 derived from ASI 2798 and dikaryotic strain ASI 2803. The GW10-95(ASI 2803 ${\times}$ ASI 2798-24) was shown the best cultural characteristics, selected to be a new cultivar and designed as 'Beesan No.2'. The 'Beesan No.2' was formed incompatibility line distinctly in the confrontation growth of parental strains ASI 2803, ASI 2798 and Beesan No.1. Analysis of the genetic characteristics of the new cultivar 'Beesan No.2' showed a different DNA profile as that of the control strains, ASI 2803, ASI 2798 and 'Beesan No.1', when RAPD(Random Amplified Polymorphic DNA) primer URP4 was used. The optimum temperature and pH arrange for mycelial growth were $25^{\circ}C$ and pH5~8, respectively. Fruiting body production per bottle was about 123.3 g. And also the stipe was long. This new cultivar 'Beesan No.2' of Pleurotus ferulae was characterized white-like variety of King oyster mushroom in the color of stipe, that was long and low yield compared to that of other cultuvar 'Beesan No.1'. We therefore expect that this new strain will increase of export and substitute cultivar of King oyster mushroom.