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해면버섯균 꽃송이버섯균에 의한 낙엽송 생입목의 (生立木) 심재부후피해 (心材腐朽被害)
김현중(Hyun Joong Kim),김준섭(Jun Suob Kim),이창근(Chang Keun Yi) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.2
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 (52-77㎏/㎠) 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.
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낙엽송근주심재부후병균의 (根株心材腐朽病菌) 분포빈도와 목재열화능력 (木材劣化能力)
김현중(Hyun Joong Kim),차주영(Ju Young Cha),이창근(Chang Keun Yi) 한국산림과학회 1991 한국산림과학회지 Vol.80 No.3
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 o 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 candidium, G. sp. and Verticillium sp., but that of P. schweinitzii was not.
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제초제처리에 (除草劑處理) 의한 잣나무털녹병 중간기주 ( 송이풀류 ) 제거시험
이창근,김현중,여운홍 ( Chang Keun Yi,Hyun Joong Kim,Woon Hong Yeo ) 한국산림과학회 1981 한국산림과학회지 Vol.51 No.1
The study was conducted during 1975-1980 to evaluate the performance of several herbicides in controling alternate host, Pedicularis spp., of white pine blister rust disease in forest stands. The results obtained were summarized as follows. 1. It was found that Roundup was effective and most suitable herbicide in the fosest stands except that it accompanied some chemical injuries to neighboring plants. 2. As for the reduction density on the plot treated with Roundup was 100% and 65-91% respectively when investigated one and two years after its treatment on Pedicularis spp. 3. Another four chemicals, 2.4-D, Gramoxone, 2.4. 5-T and Para-col killed stems and leaves of Pedicularis spp. at the year treated, but appeared again next spring. 4. Eradication effectiveness in terms of spraying season was proved to be that late August was better than late May or June.
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우리나라 잣나무 털녹병균의 기주선택성과 (寄主選擇性) 병원성조사
이창근,김현중 ( Chang Keun Yi,Hyun Joong Kim ) 한국산림과학회 1983 한국산림과학회지 Vol.62 No.1
Pedicularts spp. are the alternate hosts of the white pine blister rust fungi in the forests of Korea, and Ribes spp. were found as other alternate hosts by artificial inoculation test. New biotypes (races) with different host selectivity and pathogenicity of the causal fungi were speculated at various places in Korea. The aeciospores of the fungi were collected from two isolated places, Pyeongchang and Namwoen, and artificially inoculated on Pedicularis resupinata and six species of the genus Ribes. Among the tested alternate host species, P. resupinata and R. montigenum were only susceptible to both the Pyeongchang population and the Namwoen population, showing similar pathogencity between the two fungai populations. Three white pine species were planted in fungus-infested stands to study the susceptibility of each tree species. Four years later, 17.7% of Pinus koraiensis and 26.3% of the P, strobus were infected, but P. parviflora was free from attack. From the above results, it was concluded that the white pine blister rust fungus populations in Korea are of the same biotype, with .P. koraiensis and P. strobus as aecial hosts, and Pedicularis spp. and Ribes spp. as telial hosts.
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