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This study was conducted to investigate the morphological characteristics and cultural conditions for artificial fruiting body(synnemata) production of Paecilomyces japonica. In the morphological characteristics of P. japonica, the size of it´s conidia was ranged from 5.0∼1.5 to 7.9∼2.4 ㎛. The artificial fruiting body showed yellow in color, shape was confirmed ellipsoidal or obovoid type, and the length was 50.6∼104.5 ㎜. The mycelial growth on the PDA medium treated with pH7, at 25℃ was superior to that of other treatments. The formation period of an artificial fruiting body of P. japonica treated with polypropylene and glass bottle culture was 30 days and 50 days, respectively. The length and number of fruiting body was longer and higher in the polypropylene bottle culture than those of the glass bottle culture. As the results, the artificial fruiting body production in the polypropylene bottle increased 1.2g per bottle compared to that of the glass bottle. It also increased in 100∼400 lx illumination, whereas the elongation of synnemata, pinheading and fruiting body growth were inhibited by continuous use of 900 lx illumination. The results of these experiment indicated that fruiting body formation seemed to be lower as the light intensity increased. The fruiting body formation was also dependent on the light color. There was a higher incidence in red color light and fluorescent light treatment than that of incandescent and blue color light. The fruiting body of the naked barley medium had so much better growth compared to other media that it would be able to use for it´s production. The growth of fruiting body was affected by CO₂, concentration. It increased after putting the lid on the bottle.
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