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- 저자 : 禹洪斗 (검색결과 3 건)
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禹洪斗,金基淸 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-
In order to clarify an effect of wound-healing on the infection of bacterial leaf blight in rice plants, relationships between the infection and the degree of wound, the time course infection after wounding at daytime and nighttime respectively, and infection after wounding at different levels of nitrogen or potassium fertilizations were investigated. Disease lesions produced. by clipping inoculation which makes the wound more severe were larger than their by prickling inoculation in the compatible combination, while no difference of lesion sizes produced by two inoculation methods was in the incompatible combinations. No infection, however, occurred 24 to 48 hours after wounding. There was no difference in the lesion sizes between both treatments at day-and nighttime. Heavy applications of nitrogen or potassium, particularly in nitrogen, produced the lesions to be large in the compatible but not in the incompatible combination. These facts indicate that wounds may be healed during 24 to 48 hours after wounding, and light has no effect on the wound-healing. Overdose of nitrogen might be prolonged the healing in compatible combinations. From the above results, it was suggested that chemical controls for bacterial leaf blight in rice plants should be done before wound-healing, namely, earlier than 24 hours after wounding.
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全南地方의 水稻白葉枯病菌 菌型과 그의 地域別 및 品種別 分布
朴淳直,金基淸,禹洪斗,崔容壽 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-
This was carried out to identify the pathotypes of Xanthomonas campestris pv. oryzae collected from regional exhibition paddys and others in Jeonnam province, and to investigate the sub-regional and varietal distributions of them in 1982. Collected isolates were identified as pathotypes Ⅰ, Ⅱ, Ⅲ and 2 unknown groups with Korean differentials; Ⅰ, Ⅱ, Ⅲ, Ⅳ,Ⅴ and 4 unknown with Japanese; Ⅰ, Ⅱ and 2 unknown with IPPI's, respectively. The fact that unknown groups were isolated suggest that some differentiation is occurring among the previous pathotypes. Using Japanese differentials, pathotype was isolated from l1 sub-regions, Ⅱ and gⅢfrom 4, g from I, g from 3, and unknown 4 groups from 8, respectively. However, there was no sub-region where all 5 pathotypes were detected. Pathotypes with Japanese differentials was isolated from 6 varieties, Iri 346 and 347, Milyang 23 and 30, Jinjubyo and Nakdongbyo: pathotype Ⅱ from 6 varieties, Suvreon 294, Irl 342 and 347, Jinjubyo and Akihikari; pathotype Ⅲ from 5 varieties, Suweon 294, Iri 346, Milyang 30 and Nongrim 41; pathotype Ⅳ from 1 variety, Jinjubyo; pathotype V from 4 varieties, Suweon 294, Iri 347, Milyang 23 and Jinjubyo, respectively.
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