• The Korean Journal of Mycology
• /
• v.34 no.1
• /
• pp.22-28
• /
• 2006

Attempts were made to control Diatrype stigma occurred on the bed-log of Shiitake using wood vinegar, Pinus koraiensis extract, Piper nigrum extract, and fungicides. Mycelial growth of D. stigma was inhibited completely at 35,000 ppm and no ascospore germinated at 25,000 ppm wood vinegar. Inhibition rates of Pinus koraiensis extract (200 ppm), and Piper nigrum extract (1,000 ppm) to ascospore germination were 98.9% and 95.9%, respectively. In fungicide selection, minimum inhibitory concentration (MIC) of benomyl, carbendazim, and thiabendazole ranged $0{\sim}0.4\;{\mu}g\;a.i/m{\ell}$. Difenoconazole at $0.08\;{\mu}g\;a.i/m{\ell}$ inhibited 98.9% of ascospore germination. Inhibition efficacy of fungicides was not highly variable among the low-, middle-, and high-temperature type strains of shiitake. Benomyl, carbendazim, thiabendazole and thiophanate-methyl could not suppress the mycelial growth of Shiitake. Tebuconazole at $0.4\;{\mu}g\;a.i/m{\ell}$ suppressed 80% of the mycelial growth and it was the highest inhibition rate among the fungicides. In field trials, wood vinegar, Pinus koraiensis extract, Piper nigrum extract, and fungicides were sprayed on the bed-logs before or after D. stigma produced pycnidia. Wood vinegar at 150,000 ppm concentration, showed control effect of 72.7% in the treatment before pycnidiospore formation. On the other hand, 70,000 ppm wood vinegar and 1,000 ppm of thiophanate-methyl showed control effects of 58.1% and 52.3% in the treatment after pycnidiospore formation.

• Journal of the Korean Wood Science and Technology
• /
• v.27 no.2
• /
• pp.62-69
• /
• 1999

With increased utilization of chemical fertilizer, soil fertility is getting serious problem. As a result, using organic soil conditioner (woody wastes or sawdust compost) would be only solution to recover soil vitality. In this study, manufacturing and characteristics of organic soil conditioner from Shiitake bedlogs (woody wastes) were studied. Also, to investigate the effect of continuous application of this bedlog compost on growth of plants, growth tests for radish and tree seedlings were done. The results are as follows ; Analytical results of decayed and fresh wood materials showed almost same as its wood components. The mixing ratio of raw materials with the other filling materials is essential for the manufacturing as well as good quality of its compost during composting process. In this experiment, mixing 12kg of urea, 25kg of lime, 40kg of chicken shit, and small amount of fermentation aids corresponding to I ton of sawdust resulted in good composts. Their moisture contents were adjusted to about 55%. Temperature of pile, in composting process, rose after I week and kept about above $60^{\circ}C$ for certain period. They were turned two times, 30th and 59th day, respectively, after piling. This bedlog compost contained 81.7% of high organic matter, 1.4% of a little nitrogen, 6.75 of pH and 25 - 30 of C/N ratio. There were no harmful effect on germination and growth of plants, such as radish and softwood and hardwood seedlings. Concerned to the effect of bedlog compost on soil temperature, the compost did not affect plant growth by changing soil temperature abruptly, but compensated the soil temperature such as a little increasing on the early morning, a little decreasing on the mid-day or afternoon (pm 2:00), and increasing on the early evening (pm 6:00).