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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.
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.
나용준,이창근,여운홍,황재우,심상영 ( Yong Joon La,Chang Keun Yi,Woon Hong Yeo,Jae Woo Hwang,Sang Yung Shim ) 한국산림과학회 1980 한국산림과학회지 Vol.49 No.1
Several plants of Populus deltoides `R-89` exhibiting symptoms of poplar mosaic described earlier by several researchers (1,2,3) were observed in the poplar nursery of the Institute of Forest Genetics at Suweon, Korea during September, 1980. The symptoms produced a mosaic or discolored yellow spottings in mature leaves with veinal and petiolar necrosis and leaf curling (Fig. 1 and 2). Leaves with mosaic symptoms were collected and leaf-dip preparations from chlorotic area were examined for the presence of virus particles with an electron microscope. Electron micrographs of the negatively stained leaf-dip preparations revealed numerous elongated virus particles ranging 200-1300nm in length (Fig. 3). Of 156 panicles measured randomly, 68 particles (43.6%) were in the range of 660-670nm in length (Fig. 4). The values obtained fell well within the range of those described for poplar mosaic virus (PMV) by other researchers (1. 2, 3). No viruslike particles were observed from poplar leaves without mosaic symptoms. Further studies on the properties of the PMV isolate and control of the disease are underway.