忠北道內 葉煙草 病蟲害의 發生 및 被害狀況調査

魯斗鉉,李重基,朴然圭,安長憲,盧載榮,朴相一 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

a) This investigation was carried out in Chung-Buk province in order to obtain the basic data for divising an effective measure of controling tobacco plant pests and insects, and for establishing the cropping system to produce better and more tobacco by thoroughly inquiring into the out break of tobacco plant pests and insects and the suffering conditions. b) Out-break rates of the main diseases and insects. As for the disease, obvious differences were shown among the kinds of disease and among the districts. Rates of out break of tobacco plant diseases were in the following order : brown spot, granville wile and virus for kinds of diseases : and Chungju-Miwon, Eumsong Jinchon, Choongju-Jechon, Poeun, Okchon, and Jeung pyong for districts. Significant differences were recognized between the region of Chongju-Miwon and the region of Poeun, Okchon, Jeungpyong, and between the region of Jinchon-Eumsong, and the region of Okchon, Jeung pyong, while the differences among other regions were insignificant. As for the insects, outbreak rate of tobacco moths amounted to 50. 2% of tobacco plants, and differences were to be seen among regions. There were differences among the region of Chung ju-Miwon, Jinchon-Eumsung and four other regions while no differences were shown among the regions of Okchon, Poeun, Jeung pyong-Choonfiu and Jechon c) Rate of injuries by those plant pests and insects were as follows: i) Diseases : quantity‥‥‥‥‥‥‥‥‥11.52% quality ‥‥‥‥‥‥‥‥‥18.42% ii) Isects : quantity‥‥‥‥‥‥‥‥‥‥‥1.53% quality‥‥‥‥‥‥‥‥‥‥‥‥1.64% Over all rates of injuries amounted to 13.05% in yields and to 20.06% in quality. d) Tendencies of outbreak and rates of injuries by each plant and insects were as follows: 1) Diseases a) Brown spot Out break-rate of brown spot was the highest, 37.8% among all. No differeances were shown by the number of successive cropping years of tobacco plants on the same land. However, highly significant differences were found among different districts. Districts of Chonaju-Miwon showed highest rate of outbreak 79.5%, As to the rates of injuries in yield by this disease, differences were shown among districts and among kinds of leaves. And same tendencies were to be seen for the rates of injuries in qualities. Especially there were highly significant defferences among kinds of leaves. Rate of injuries both in yield and in quality was highest in medium leaves and in the order of main leaves, low leaves and high leaves. Some of the rates of injuries in different districts are shown below : ◁표 삽입▷ (원문을 참조하세요) The average rails of injuries caused by this disease (Brown Spot) were 1.00% in yield and 1.85% in quality. b) Virus disease Average rate of outbreak of virus was 15.2%, next to brownspot, and was not related with the number of successive cropping years of tobacco on the same land. But each district showed different infection rate of virus; for instance, the outbreak-rate of virus in Jinchon Eumsong district amounted to 29.7%, which was the highest. Rate of injuries in yield by virus showed no obvious difference among districts but there were highly significant differences according to the degrees of infection: highest rate of injuries occured at outbreak index "5." Rates of injuries in quality showed highly significant differences among districts and degrees of infection: Several injuries were found in Jinchon Eumsong district, being 15.57% and at outbreak index "5" The average rates of injuries by this disease were 4.18%, in yield and 8.25% in quality injuries in yield was next to the highest caused by granville wit and injuries in qualities was the highest among the injuries caused by other diseasess and insects investigated. c) Granville wilt It was only granville wilt among the diseases which were investigated that showed sign ificant difference of outbreak rate and of rate of injuries in yield owing to the number of successive years of cropping tobacco on the same land differences in rates of injuries were insignificant in each districts, but the more the years of continious cropping of tobacco the more the outbreak rate and loss in yield were observed. Outbreak rate of this disease was 9.9% and highest rate of injuries in yield was 9.9% found on the land of 20 years successive cropping of tobacco. Average rate of injuries caused by granville wilt were 5.95% in yield, the highest among the diseases and insects, and 7.91% in quality, the next the highest injuries caused by virus. 2. Injuries caused by insects: a) Tobacco moths and Tobacco bug. Outbreak rate of mouths was 50.2% showing no difference owing to the number of successive cropping years of tobacco on the same land. But high differences in outbreak rate were found among districts : for instance, in Chongju-Miwon district, outbreak-rate amounted to 78% which was the highest percentage. Rates of injuries in both yield and quality showed great differences among districts and kinds of leaves. Greatest injuries occured in Chongju-Miwon district being 2.55% in yield and 2.59% in quality. Main leaves suffered the most injuries and next were in the order of medium leaves, high leaves and low leaves. Outbreak rate of tobacco bug was 2.9%, and the rate of injuries was 0.02%, only in quality, very slight, Average rates of loss caused by insects in the whole districts were 1.45% in yield and 1.55% in quality. b) Nematode. This survey was carried out in order to reveal tendency of the inhabitation density of nematode according to successive cropping of tobacco plants on the same land. Inhabitation density of nematode was found to be increasing remarkably with the years of successive of tobacco. In course of 5 to 6 years of successive cropping of tobacco plants on the same land, inhabitation density increased gradually and reached the maximum density at 11 to 20 years of successive cropping. Among districts, difference was found between the new production area and the old production area. As describe above, out break of granville wilt of tobacco plants increased with the number of successive cropping years. And with the same number of successive cropping years, outbreak of granville wilt increased with the inhabitation density of nematode. c) The effect of brown spot, anthracnose, wild fire etc, upon the yield and quality of tobacco plants, which have not studied in this investigation will be studied later. And the later study will also include concrete survey on the time and outbreak conditions of tobacco disease and insects, countermeasures against successive cropping of tobacco, and relation between inhabitation density of nematode outbreak diseases, etc.

葉煙草 病蟲害防除에 關한 硏究 : 1. 煙草 赤星病菌 胞子飛散과 發病과의 關係 The Relationship between the spore dispersal and Seasonal disease development on the Tobacco Brown spot

魯斗鉉,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

This study was carried out for the purpose of forecasting and prevention the tobacco brown spot disease. The numbers of spore disporsal flying around the fields A, B and C were counted every day from June to August in 1968. The disease development was investigated from the one of the three fields during the above similar period. The meterological data was observed by the Cheongju, Meterological station. The results obtained are as fallow The spore dispersion curvets of the three tobacco fields have shown similar tendency each other. The highest peak of spore dispersal which was appeared before the occurence of the disease has shown in the middle of June in the case of korea. Several other peaks were found later during the occurence period of the disease. The spore dispersion curves seemed to he related with differences in temperatures and the precipitations. The occurence of this disease started to appear in the fields later the early of July and was closely related with the mean temperatures at 25℃. The older tobacco leaves grew and the upper the leaves grew up, the more the disease development increased. The virulent period of this disease was reached the peak at the latest harvesting stage of the leaf tobacco around the last of August.

葉煙草 病蟲害 防除에 關한 硏究 : 4. 煙草 赤星病 發病과 移植時期에 關하여 Response of tobacco to Brown spot Disease and Transplanting period

魯斗鉉,沈載燮,裵吉寬 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

In this experiment the main object was to examine the transplanting period upon the infection of the tobacco brown spot disease in the field. Four treatments graded upon the transplanting times were conducted May 6, May 15, May 22 and May 28 observations of lesion number were three times; July18, July30. and Augusut16. Earthing, topping and harvesting were done at the same time in each plots. The ratio of lesion was increased by early transplanting in the field. The transplanting of May 28 showed the lowest infection of tobacco brown spot among four plots.

葉煙草 病蟲害防除에 關한 硏究 : 6. 煙草 赤星病 防除를 爲한 殺菌劑의 圃場效果 試驗 Studies on the Effects of Fungicides on Tobacco Brown Spot

魯斗鉉,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

The Present paper was initiated to solve the problems of effective fungicides favorable times and frequencies of spraying in order to control tobacco brown spot in the field. Sample fungicides were Dithane M-22, Orthocide, Fermate and Bordeaux mixture added with PTA-B which were selected by spore supressing method in laboratory. Among the above fungicides ; 4-4 Bordeaux mixture added with PTA-B(1/3000) showed the most effects and the following degreeing order in the effects was recognized ; Dithane M-22, Orthocide and Fermate. The time and frequency of spraying was carried out wish 8 treatments with a combination of 3times and 3frequencieg. The results were as follows: Treatment No.4, No.6 and No.7 stowed the best effects and next effectes was appeared in the treatment No.2, No3 and No5. Although treatment No.1 showed almost no effects, it seems to be important that the best group, treatment No.4, No.6 and No.7 include the treatment No.1 when no outbreaks were found at all. Treatment No.1 ~ Three applications in former period of outbreak. Treatment No.2∼Three applications in same period of outbreak. Treatment No.3~Three applications in later period of outbreak. Treatment No.4~Each 3 applications in former and same period of outbreak. Treatment No.5~Each 3 applications in same and later period of outbreak Treatment No.6~Each 3 applications in former and later period of outbreak Treatment No.7∼Each 3 applications in former, same and later period of outbreak Treatment No.8~control.

담배 赤星病感受性의 품종간차이에 관한 연구

노두현 忠北大學校 1969 論文集 Vol.3 No.-

羊齒植物 中心柱의 형태학적 연구

노두현 忠北大學校 1960 論文集 Vol.1 No.-

연초의 연작에 토양선충 및 바이러스 병해가 미치는 영향

魯斗鉉,安長憲 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

양치식물 중심주의 형태학적 연구

노두현 忠北大學 1960 論文集 - 忠北大學校 Vol.1 No.1

-본문참고-

煙草의 連作에 土壤線蟲 및 Virus立枯病害 미치는 영향

노두현 忠北大學校 1968 論文集 Vol.2 No.-

葉煙草 病蟲害防除에 關한 硏究 : 3. 煙草 赤星病 發病과 栽植密度에 關하여 Response of Tobacco to Brown spot Disease planting Space

魯斗鉉,盧載榮,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-

The experiment was caried out with 5 treatments of 24, 28, 32, 36 and 38((standard ; 96×45cm_ hills pyer 4 Pung(4×3.15m) and 3 replication. The numebr of lesions among treatments investigated for three times showed no significance. According to the above result, it seems better to examine the effect of planting density upon the production of leaf tobacco and the effect of field work after topping.