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http://dx.doi.org/10.4489/KJM.2009.37.2.144

Occurrences of Major Mushroom Diseases and Microbial Densities of Mushroom Cultivation Facilities  

An, Yu-Na (Department of Molecular Biotechnology, Konkuk University)
Jang, Bo-Ra (Department of Molecular Biotechnology, Konkuk University)
Kim, Myun-Su (Department of Molecular Biotechnology, Konkuk University)
Weon, Hang-Yeon (The Center for National Genetic Resources, RDA)
Jhune, Chang-Sung (Department of Mushroom, Division Ginseng and Specialty Crop, National Institute of Horticulture and Specialty Crop Sciences, RDA)
Cheon, Se-Chul (Department of Molecular Biotechnology, Konkuk University)
Publication Information
The Korean Journal of Mycology / v.37, no.2, 2009 , pp. 144-149 More about this Journal
Abstract
The occurrences of the major diseases and the densities of air-born microbes were surveyed in the cultivation facilities for oyster mushroom (Pleurotus ostreatus), king oyster mushroom (Pleurotus eryngii), and enoki mushroom (Flammulina velutipes) in different areas of Korea. Green mold disease was most often developed in oyster mushroom bed cultivation with the disease incidence rate of approximate 10% while the disease incidences from bottle and plastic envelop cultivation were less than 1~2%. In the bed cultivation, the major air-born microbes in the growth room were Aspergillus, Penicillium, Trichoderma, and Curvularia with the total fungal population density of 567~1,297 CFU/$m^3$ . However, only Trichoderma and Penicillium were detected in the growth rooms and innoculation rooms of bottle and plastic envelop cultivation with the densities of 350~700 CFU/$m^3$ and 160~260 CFU/$m^3$, respectively. The bacterial diseases become evident in the growth rooms of bottle and plastic envelop cultivation with the approximate incidence rate of 10%. The identified bacterial species were Brevibacillus levelkil, Rhizobium radiobacter, Brevundimonas vesicularis, Pseudomonas mosselii, Microbacterium testaceum. Sphingomonas panmi, Sphingomonas yabuuchiae, Paracocus dinitrificans, Curtobacterium flaccumfaciens pv. flaccumfaciens and some unidentified bacteria with the densities of 40~6,359 CFU/$m^3$ in the growth rooms and 9 CFU/$m^3$ in the inoculation room. This study indicated that the green mold disease by fungal strains was the major mushroom disease in the bed cultivation and suggested that the contamination of bacteria and fungi together in the growth media could result in severe production loss. The plastic envelope and bottle cultivation were evidenced to be less susceptible to such contaminations.
Keywords
Bed cultivation; Green mold disease; Oyster mushroom; Trichoderma species;
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