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- 저자 : 白壽鳳 (검색결과 93 건)
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하우스栽培에서 發生하는 菜蔬 主要 病原菌의 培養的 特性 調査
白壽鳳 건국대학교 1984 學術誌 Vol.28 No.2
The study has been carried out for the relationship of nutrition, temperature, pH and light between the growth of mycelia and spore formation of Botrytis cinerea and Fusarium oxysporum which isolated from tomato, cucumber, and strawberry, Phytophthora infestans which isolated from tomato and Phytophthora capsici which isolated from red pepper. The results obtained are summarized as follows : 1) The mycerial growth of Botrytis cinerea was good in matt agar media and in tomato juice agar media. The mycerial growth of this fungus was good in Glucose and Dextrin media with Carbonsource, in NH4NO3, L-glutamic acid and Arginine media, with Nitrogen-source, and in A, E and compound media with Vitamin. The optimum temperature was 20-25℃ and the optimum pH was 5. Their mycerial growth was good under the continuous darkness treatment and alternative treatment of darkness and fluorescent light. The mycerial growth of Botrytis cinerea was inhibited by the continuous ultraviolet light treatment and there were no spore formation. 2) The mycerial growth of Fusarium oxysporum was good in P.S.A. media, and the growth of aerial mycelium was good in malt agar media and tomato juice agar media. Mycelial growth of this fungus was good in Dextrin media with Carborn-source, in KNO3 and Arginine media with Nitrogen-source, and in media with Vitamin A. The optimum temperature was 25℃ and the optimum pH was 7. 3) The mycerial growth of Phytophthora infestans and Phytophthora capsici was good in P.S.A. media. There was the formation of Zoosporangium by Phytophthora capsici in oatmeal media. The mycerial growth of both fungus was good in Glucose and Glycerin with Carbonsource, in NaNO3 media with Nitrogen source, and in media with Vitamin A. The zoosporangium was formed only by Phytophthora capsici the media added with Vitamin A and K. Optimum temperature was 25-30℃ and optimum pH was 7. Both fungus showed good growth by the all light treatments. Phytophthora capsici formed the zoosporangium under the condition of continuous light treatment and the alternative treatment of darkness and light.
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窒素施肥量 및 菌株가 稻葉部位에 따른 稻熱病의 稻原力과 病斑型에 미치는 影響
白壽鳳 건국대학교 1980 學術誌 Vol.24 No.2
The effect of nitrogen and Pyricularia oryzae strains on disease index and lesion type of leaf blade at different positions and leaf parts in paddy field was examined and the results were as follows 1)The disease index of the upper 1st leaf to 3rd leaf at 2 times of nitrogen was not different from that of the standard nitrogen. The disease index of the upper 4th leaf at 2 times of nitrogen was higher than that of the standard nitrogen and lesion type was brown spot type, chronicity type and acute type. 2)The disease index of the upper part at the standard nitrogen was higher than that of the lower part. The disease index of the middle part at the 2 times nitrogen was highest and that of the lower part was lowest. In the standard nitrogen the upper part showed chronicity type and acute type and the lower part showed few spots of both type. In 2 times nitrogen chronicity type was appeared at the upper and the lower part but few at the middle part, and acute type was appeared at the middle part, but few at the lower part. 3)The disease index of Pyricularia oryzae strains was in order of the first, second, third and fourth leaf from highest to lowest. This tendency was shown only in acute type not in brown spot type and chronicity type. 4)The disease index and lesion type of blade leaf of Pyricularia oryzae strains did not have consistent along the leaf position.
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白壽鳳 建國大學校附設 農業資源開發硏究所 1977 論文集 Vol.3 No.-
人蔘의 連作障害原因을 究明하기 위하여 山蔘이 100年間 野生된 土壤과 人蔘을 6年間 栽培한 土壤을 土深別로 採取하여 理化學的 性質을 比較 檢討한 結果를 보면 다음과 같다. 1) 山蔘採取地土壤은 砂質埴壤土이고 人蔘採取地土壤에서 上層土는 砂質壤土이나 下層土는 埴壤土였다. pH는 다같이 微酸性으로 비슷하였고 土深이 깊을수록 다소 酸度가 높아지는 경향이 있다. 2) 有機物含量은 山蔘採取地土壤에 현저하게 많았으며 土深이 깊을수록 減少되었다. 3) 燐酸含量은 人蔘採取地土壤에 많았으며 土深이 깊을수록 다소 減少되었다. 4) 加里含量은 山蔘採取地土壤에 많았고 土深이 깊을수록 減少되었다. 그리고 石灰, 苦土含量은 一定한 경향을 볼 수 없었다. 5) 硅酸含量은 一定한 경향을 볼 수 없었다. 6) 微量元素 중에서 Mn 및 Zn 含量은 人蔘採取地土壤에 많았고 Fe含量은 山蔘採取地土壤에 많았다. 그리고 Cu 및 B 含量에서는 一定한 경향을 볼 수 없었다. 土深에 따라서 山蔘採取地土壤은 Mn, Fe含量에 變化가 없었다. This studies are concerned mainly with depth components of the soil on the cause of its sickness in the continuous cropping of cultivated ginseng and wild ginseng. The obtained results are summarized as follows. 1. The texture of soil in which wild ginseng grew was silt clay loam. The soil where ginseng cultivated was silt loam at the upper layer and clay loam at the lower layer. pH was a week acid in the soil samples for the cultivated ginseng, and wild ginseng was acidulated to the depth of soil. 2. The content of organic compounds was greater in the sample soil for wild ginseng. But the content of organic compounds in the soil for wild ginseng decreased in proportions to the soil depth. 3. The phosphate was contained in greater amount in the sample soil for cultivated ginseng than in that for wild ginseng. But content of phosphate in the soil for cultivated ginseng decreased proportionately to the soil depth. 4. The potassium increased in greater amount in the sample soil for wild ginseng than in that for cultivated ginseng. But the content of potassium in the soil for wild ginseng decreased. No fixed tendency of difference was found between soil for wild ginseng and that for cultivated ginseng in the components of calcium and magnesium. 5. The difference was insignificant in the amounts of silica between the soil for wild ginseng and that for caltivated ginseng. 6. The components of mangan and zinc increased in the soil for cultivated ginseng, but iron increased in that for wild ginseng. The difference in the amounts of cropper and boron were of no significance between the soil for wild ginseng and that for cultivated ginseng. But there was no change in the content of mangan and iron according to the depth of soil for wild ginseng.
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고추의 新病害 Fusarium oxysporum 菌에 관한 硏究
白壽鳳,李庚熙 建國大學校附設 農業資源開發硏究所 1983 論文集 Vol.8 No.-
The studies were carried out in the laboratory for the identification, pathogenecity and some cultural characteristics of Fusarium sp. isolated from diseased crown of red pepper in vinyl house cultivation in the areas of Gim Hae, Mil Yang and Seoul. The results of the studies are summarized as follows: 1. Strains of Fusarium sp. isolated from red pepper showed pathogenecity and they were identified as Fusarium oxysporum. 2. The best mycelial growth of these fungus appeared on P.S.A. media, at pH 5 and 25∼30˚C temperature zone. 3. There were some different pathogenecity and some cultural characteristics among strains of Fusarium oxysporum.
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肥料의 種類와 施肥量에 따른 벼 品種間의 稻熱病 發生과 lignin 含量과의 關係
白壽鳳,朴澤奎 건국대학교 1973 學術誌 Vol.15 No.1
This experiment was carried to clarify the relationship between the degree of the blast developing and the lignin contents in Tongil, resistant variety, and Pungok, susceptible one, by dressing the N, P2O5, K2O, and SiO2 in ordinary and two time fertilizer (only SiO2 was dressed and none) in 32-treatments with factorial design method. The results are summarized as follow ; 1. Tong-il was highly resistant to the blast disease regardless of the kind of fertilizers and their dressing amount (Tab. 1). 2. The increasing amount of nitrogen fertilizer dressed in Pung-ok promoted the blast development and the larger application of P2O5, K2O and SiO2 inhibited the blast development.(Fig. 4) 3. Of the interactions between two factors (fertilizer), the dressed sections of K2Si1, N2K2 and P1K2 inhibited the blast growth and the sections of P1Si0 and P2Si0 promoted the disease. 4. Of the interactions among the three factors, the dressed section of N1K2Si1, N1P1K2 and N1P2Si1 inhibited the blast and the N2K1Si0 and N1K1Si0 promoted it. 5. And, of the interaction among the four factors, the dressed sections of N1P1K2Si1, N1P2K1Si1 and N1P2K2Si1 showed strong resistance to the blast and N2P1N1Si0, N2P1K2Si0 and N1P1K1Si0 soem to be susceptible to the blast. 6. When the higher the development of the blast, the content of lignin in rice plant leave was lower.
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잔디 Brown patch와 Large patch병 방제를 위한 향균성 약용식물 탐색
백수봉,심성철,구한모,여운각 한국잔디학회 1998 한국잔디학회지 Vol.12 No.3
Of crude extracts from 30 species belonging to the 21 families of medical plants, the crude extracts from Cinnamomum cassia, Paeonia moutan, Dictamnus dasycarpus showed highly antifungal activities against Rhizoctonia solani AG1-1 and R. solani AG2-2. The antifungal activity of C. cassia and P. moutan against R. solani AG1-1 were the highest through 100% methanol extraction, but the one of D. dasycarpus were the highest through 80% methanol extraction. On the other hand, against R. solani AG2-2 the antifungal activity of them were the highest through 100% methanol. C. cassia P. mouton and D. dasycarpus showed over 60% inhibition of mycelial growth against R. solani AG1-1 and R. solani AG2-2 on up to 500 fold dilution. The crude extract of P. moutan showed broader antifungal spectrum compared with those of C. cassia and D. dasycarpus. The crude extract of C. cassia was not phytotoxic at over 250 fold dilution and the crude extract of P. moutan was not phytotoxic at over 100 fold dilution. The crude extract of D. dasycarpus was not phytotoxic even at full concentration. The control values of P. moutan and D. dasycarpus were increased 75.0% and 79.1% respectively 30 days after treatment. 21과 30종의 약용식물의 Rhizoctonia solani AG1-1(brown patch)와 R. solani AG2-2(large patch)에 대한 항균활성을 조사한 결과 계피, 목단피, 백선피가 강한 항균활성을 나타내었다. R. solani AG1-1에 있어 계피와 목단피는 100% methanol로 추출한 것이 활성이 가장 높게 나왔으며 백선피는 80% methanol로 추출한 것이 높게 나왔다. 반면에 R. solani AG2-2에 있어서는 모두 100% methanol에서 활성이 가장 높게 나왔다. 농도별 활성은 이들 조추출물의 500배 희석액에서 60%이상 공시균주의 균사생장이 억제되었다. 항균specturum은 목단피가 가장 넓었다. 계피조추출물은 250배이상 희석액에서 목단피의 조추출물은 100배이상 희석액에서 약해를 나타내지 않았으며 백선피의 조추출물은 전혀 약해를 나타내지 않았다. 처리 30일후 방제가는 목단피 처리구 75.0%, 백선피 처리구 79.1%로였다.
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