• Journal of Korean Society of Forest Science
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• v.80 no.3
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• pp.311-316
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• 1991

Butt-rot fungi were isolated from decayed portion in butt rotted larch trees[Larix leptolepis(Sieb. et Zucc.) Gord.]. From a total of 216 affected trees in 38 forests of five provinces, Sparassis crispa(Wulf. ex Fr.) Fr. was isolated with the highest frequency, i.e.. 28% of the total trees. Laetiporus sulphureus(Fr.) Bond. et Sing, with 19%, and Phaeolus schweinitzii(Fr.) Pat. with 8%. However, none of these fungi was isolated from 45% of the trees. Wood decaying abilities and interaction of four basidiomycetous and three non-basidiomyo:etous fungi isolated from butt rotted trees were investigated. The weight loss of larch wood blocks, when exposed to the culture of a fungus for six months, was 19.6% for P. schweinitzii, 10% for S. crispa, 8.2% for L. sulphurous, 5.1% for Coriolus hirsutus, and less than 4.4% for three non-basidiomycetous fungi. In incubation with combinations of the fungi, the wood decay activity of S. crispa, L. sulphurous and C. hirsutus was increased by the non-basidiomycetous fungi of Geotrichum candidacy, G. sp. and Verticillium sp., but that of P. schweinitzii was not.

• Journal of Korean Society of Forest Science
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• v.79 no.2
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• pp.138-143
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• 1990

In mature stand of Japanese larch (Larix leptolepis(S. et Z.) Gordon) planted in 1925, heartrot damage was investigated by felling some infected trees with fruit bodies of two butt-rot fungi, Phaeolus schweinitzii and Sparassis crispa. Percentage of heartrot area on basal area of decay trees was 19.2-74.4, and the height reached by the decay was 1.2-5.5m. Percentage of decay volume was in the range of 2.2-13.4%, but the loss wood to the height reached by the decay amounted to 27.2% (range 13.1-37.1%) of whole volume, Decay damage caused by S. crispa was much greater than that caused by P. schweinitzii. Compressive strength ($52-77kg/cm^2$) and specific gravity (0.40-0.47) of rot wood was reduced to 77% and 39% respectively in maximum as compared to sound wood of healthy tree, and those of sound-looking wood close by heartrot to 42% and 26%. The current annual growth of trees with decay was fallen behind that of sound tree from eight to fourteen years after planting in D. B. H. and from twelve to twenty-one years after in volume.

• 한국균학회소식:학술대회논문집
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• 2009.05a
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• pp.21-25
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• 2009

• Journal of Korean Society of Forest Science
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• v.98 no.1
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• pp.16-25
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• 2009

Cauliflower mushroom (Sparassis crispa) is recently recognized as a new edible and/or medicinal mushroom cultivated with conifers. By the way, the mushroom is notorious as a brown-rot fungus that causes a buttrot of larch. So, there should be a careful consideration to apply the mushroom cultivation in coniferous stand. This study was conducted to clarify the seriousness of heartwood decay on conifers such as larch by cauliflower mushroom with surveying the mushroom producing environment and to examine whether the cultivation of cauliflower mushroom produce any problem in conifer stands or not. The mushroom occurred in various coniferous stands such as Larix kaempferi, Pinus koraiensis, P. densiflora and Abies holophylla on fertile soils with adequate moisture. Soil texture of the mushroom producing site was comparatively fine compared to general forest soils; sandy loam, loam and silty loam. Soil pH ranged from 4.6 to 5.2, and organic matter contents were 4~11%, which showed relatively wide range. We could find S. crispa by a DNA technique from the wood that seemed to have no heartwood decay by naked eyes. The damaged wood showed 30% higher moisture contents than that of sound wood, while the compressive strength was 30% lowered down compared to that of sound wood. The fungus may invade conifers through the scars occurred on roots or stems, in this case spore dispersion of the mushroom takes a great role. Thus, we concluded that forest tending activities need to be applied with considering the invasion of S. crispa, and cultivation of cauliflower mushroom in forest should be attempted very carefully. By the way, we also infer that conifer stands can be nurtured without heartwood decay by S. crispa if the stand be managed in good aeration conditions by proper silvicultural practices such as sanitary thinning.