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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Weed Science
Journal Basic Information
Journal DOI :
The Korean Society of Weed Science
Editor in Chief :
Volume & Issues
Volume 11, Issue 3 - Sep 1991
Volume 11, Issue 2 - Jun 1991
Volume 11, Issue 1 - Mar 1991
Selecting the target year
Effect of Plant Growth Regulators on Lodging in Rice
Lee, Sang-Chul ; DeDatta, S.K. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 87~99
The experimental growth regulators Hoe78784 and PP-333 significantly reduced lodging in all rices. However, they did not significantly affect the crop vegetative characteristics and yield components, except by decreasing plant height when both growth regulators were applied at booting stage. Grain yield of IR21820-154-3-2-2-3 increased due to reduced lodging when Hoe78784 and PP-333 were applied at booting. These growth regulators increased the thickness and diameter of the culm. Applying CCC did not affect lodging in all test varieties. CCC-treated varieties and the control showed lower number of vascular bundles and culm thickness and diameter of the third and fourth internodes. Hoe78784 and PP-333 significantly reduced internode length from the second to the third internode in short-statured varieties. In tall varieties. reduction extended up to the fourth internode. Culm N content of the varieties did not significantly differ among treatments, except in IR8. Culm P content also did not differ significantly among treatments. although K and Si content was the highest than control when Hoe78784 was applied.
Herbicidal Phytotoxicity of Early Rice Seedlings as Affected by Cultural Practices III. Response of Phytotoxicity with Water Depth and Drainage Level per Day
Han, S.U. ; Guh, J.O. ; Kwon, S.L. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 100~105
Maintaining the water level at 5cm depth showed less decreasing in number of tiller and dry weight as compared to 1 and 3cm depths when Bensulfuron and Pretilachlor were applied. The drainage more than 5cm as water level everyday caused the growth inhibition when Bensulfuron and Pretilachlor were used, while Dimepiperate was rather safe.
Herbicidal Phytotoxicity of Early Rice Seedlings as Affected by Cultural Practices IV. Response of Phytotoxicity with Application Rate of Fertilizer and Organic Matter
Han, S.U. ; Guh, J.O. ; Kwon, S.L. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 106~110
There was a tendency that the growth inhibition of early growth due to herbicides was increased with increasing the amount of fertilizers. As a matter of fact, pretilachlor and pyrazolate increased the degree of injury with increasing the amount of fertilizers, and dimepiperate was actually safe regardless of the amount of fertilizer applied, while in case of bensulfuron, the injury become less when it was applied without fertilizers. As for organic matters, dimepiperate and pyrazolate were rather safe without organic matter, while pretilachlor and bensulfuron become really safe with the application of organic matter more than 1,000 kg/10a.
Growth Habits of Scirpus planiculmis F. Schmidt in Poldered Paddy Field
Lee, K.S. ; Han, K.H. ; Park, S.H. ; Choi, S.Y. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 111~116
This studies were conducted to get the basic information on the growth habits of Scirpus planiculmis F. Schmidt for control in poldered paddy field. The distribution of corm was about 16% in 0-5cm, 66% in 5-8 cm. 18% in 8-10cm depth of underground. The mean depth of total corm distribution was about 6.51cm. Number of rhizomes and dormant buds per corm were one to four, respectively. Number of rhizomes. dormant buds and total buds(rhizome+dormant bud) were 2.34, 2.85 and 5.20, respectively. The phyllotaxy of S. planiculmis was 1/3 and bracteal leaf were showed from first to 4th leaves. The period of propagation to 100 plants from emergence was 58.52 and 48 days for corm seeded on March 25th, b4ay 7th and June 6th respectively. Days to emergence of S. planiculmis from emergence of previous plant was gradually shorted. as order of propagation from corm seeded progressed. The other side, length of rhizome, plant height and diameter of culm was increased. The plant height of S. planiculmis was higher than rice plant from early stage in rice direct seeding culture, and from 30 dats after transplanting in rice transplanting culture. Speed of propagation was faster in rice direct seeding culture than in rice trasplanting culture.
Residual Activity and Effect of Soil Applied Herbicides on Succeeding Crops in Vegetable Field 3. Growth Inhibition of Test Plant According to Concentration Level of Herbicides in Sterile Agar Medium
Ryang, H.S. ; Moon, Y.H. ; Choi, E.S. ; Jang, M.S. ; Lee, J.H. ; Chang, Y.N. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 117~121
This experiment was conducted to identify the relationships of concentration with phytotoxic rate of dinitroamide and acid amide herbicides which have showed the longest residual period in soil. Four herbicides treated showed greater inhibition on roots than shoots, greater inhibition by herbicides was obtained for Italian ryegrass than for Radish. Nitralin, pendimethalin, and ethalfluralin at 0.01ppm gave about 20% inhibition of Italian ryegrass roots, whereas about 47% inhibition was obtained with napropamide. Fifty percent inhibition(
) of roots and shoots of Italian ryegrass was 0.036 and 0.132ppm for nitralin. 0.063 and 0.097ppm for pendimethalin. 0.042 and 0.092ppm for ethalfluralin. 0.027 and 0.071ppm for napropamide respectively. On the other hand,
of roots and shoots of Radish was 1.028 and over 10ppm for nitralin. 1.925 and 4.885ppm for pendimethalin, 2.669 and over 10ppm for ethalfluralin, and 0.515 and over 10ppm for napropamide respectively. There was positive correlation between the concentration of herbicides and growth inhibition of Italian ryegrass and radish.
Allelopathic Effect of Barley and Rice Straw on Weed Growth
Lee, C.W. ; Kim, C.S. ; Chang, Y.H. ; Youn, K.B. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 122~127
The allelopathic effects of rice and barley straws on lettuce germination and weed growth were investigated. The grinded straw of rice significantly inhibited lettuce germination. Both rice and barley straws decreased weed growth when they were used as a mulch in the field. Rice straw mulch applied with 500g/
decreased dry weight of Alopecurus aequalis more than 35%. Barley straw mulch applied with 200 g/
inhibited dry weight of Echinochloa curs-galli and Digitaris sanguinalis, while the straw applied with 300 g/
decreased those by 97%.
Influence of Dichlorprop and MCPB on the Reduced Effect of Fruit Drop and Fruit Quality before and after Storage in Apples
Lee, H.S. ; Kang, C.K. ; Ryu, G.H. ; Park, Y.S. ; Jung, J.H. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 128~136
This experiment was conducted to evaluate the effect of plant growth regulators, dichlorprop and MCPB on the reduced effect of fruit drop and fruit quality before and after storage in apples. Dichlorprop was tested with dilution of 1000 at 30, 40, 50 days before harvesting, and MCPB with dilution of 4000 at 15, 25, 35 days before harvesting. The results are summarized as follows : Percentage of fruit drop was appeared to the notable reduction as compared with the untreated control when regulators was applied with dilution of 1000 at 30 days before harvesting by dichlorprop and with dilution of 4000 at 35 days before harvesting by MCPB. Degree of fruit colour showed to the remarkable promotion at all the treatment of 30, 40, 50 days before harvesting by dichlorprop as compared with the untreated control. Sugar contents in flesh was increased a little at the treatment of 30 days before harvesting by dichlorprop, but acid contents in flesh was reduced at all the treatment of 30, 40, 50 days before harvesting by dichloroprop and at 15, 25, 35 days before harvesting by MCPB. Passed firmness of fruit after storage was maintained at the treatment with dilution of 4000 at 35 days before harvesting. Therefore, it was repressed a softening of fruit, but by dichlorprop treatment at 30, 40, 50 days before harvesting, fruit firmmess was appeared to reduce according to the passage of storage period. Amount of ethylene evolution after storage was showed to reduce at all the treatment by early treated time of dichoroprop and MCPB, but carbon dioxide increased at treatment conditions such as the front. Accordingly, these relationship showed to be contrary each other.
Establishment of a New Herbicides Screening Method Using Photoautotrophic Cultured Cell II. The Responses of Chlorophyllous Cells to Paraquat and Diuron in Tabacco
Suh, S.K. ; Kim, K.U. ; Kwon, S.T. ;
Korean Journal of Weed Science, volume 11, issue 2, 1991, Pages 137~141
This study was conducted to determine the response of newly developed chlorophyllous cells against photosynthesis inhibitory herbicides in LS medium. Inhibition of the growth of the selected chlorophyllous cells in the LS medium containing sucrose 1%, NAA
M and BA
M under light condition increased as the concentrations of paraquat increased from
M. The calli died in
M paraquat treatment and the inhibition of calli growth was greater when
was supplied. In the treatment of herbicide diuron, the inhibition of calli growth also increased as the concentrations of diuron increased from
M and more inhibition was observed at 1% sucrose than 2% sucrose.