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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 9, Issue 3 - Dec 1989
Volume 9, Issue 2 - Jun 1989
Volume 9, Issue 1 - Mar 1989
Selecting the target year
A Morphological Method to Investigate the Injurious Effects of Herbicides on Rice Plant
Shibayama, Hidejiro ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 81~89
Effect of Plant Growth Regulator Treatments on the Growth and Lateral Root Formation in Soybean Sprouts - 2. Effect of Plant Growth Regulator Treatment on the Ethylene Evolution in Soybean Sprouts
Kang, C.K. ; Lee, J.M. ; Saka, H. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 90~96
This experiments were conducted to investigate the effect of plant growth regulator treatments on the ethylene evolution in soybean sprouts. Major results can be summarized as follows. 1. IAA showed no significant effect on the ethylene evolution in soybean sprouts. 2. BA increased significantly ethylene evolution while kinetin, zeatin, zeatin riboside were less effective on the ethylene production in soybean sprouts. 3. As the BA concentration was increased, the ethylene evolution was increased. 4. BA increased ethylene production more effectively at earlier stages while 4PU-30 was more effective for ethylene production rather continuously. 5. The order of effectiveness of cytokinins and auxin on the ethylene evolution was as follows : BA 25 ppm>BA 25ppm+IAA 25ppm
4PU-30 25ppm>IAA 25ppm>control. 6. It can be concluded that BA was the most effective in inhibiting lateral roots, among the cytokinins tested, and resulted in the biggest diameter of hypocotyl by the ethylene evolution stimulated by BA treatment.
Effect of Plant Growth Regulator Treatments on the Growth and Lateral Root Formation in Soybean Sprouts - III. Effect of Plant Growth Regulator Treatments on the Root Primordia, Lateral Root Formation, Water Retaining Ability and ABA Content in Soybean Sprouts
Kang, C.K. ; Lee, K.H. ; Park, Y.S. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 97~102
1. IAA showed no significant growth of root primordia and then lateral root emerged at 2 days after IAA treatment. BA treatment, however, strongly inhibited the formation of root primordia and a few lateral roots, if any, emerged about 5 days after treatment. 2. Treatment of BA and Indol-B on the water retaining ability sampled 1, 3, 5 days after chemical treatment was apparent on the soybean sprouts sampled 5 days after treatment while the difference among the treatments was negligible when sampled 1 and 3 days after treatment. 3. BA stimulated ABA content in the hypocotyl while inhibited ABA content in the root of soybean sprouts. ABA may relate with water retaining ability. 4. Soaking the soybean seeds to several seed disinfectant chemical solution had no effect on the growth and elongation of soybean sprouts. 5. It can be recommended that container of soybean sprouts should be shut tight during growing period except irrigation because the ethylene accumulation in the container may stimulate hypocotyl swelling and inhibit length of soybean sprouts.
Effect of Butachlor Injury to Yield Component and Yield of Rice Cultivar
Lee, Y.M. ; Shin, D.Y. ; Kim, C.S. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 103~107
Five rice cultivars were treated by four dose of butachlor at transplanting seedling stage. Visual injury rate by butachlor was lowest in Zhy-Lian-Ai-dun-Nam and highest in Samseungbyeo, but reduction of yield was higher in Zhy-Lian-Ai-Yun-Nam and Hangangchalbyeo than in Samseungbyeo and Cheungcheungbyeo. Reduction of panicle number by butachlor was most effective factor to yield reduction.
Germination and Seedling Development of Rice and Echinochloa Species
Kim, Soon-Chul ; Moody, Keith ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 108~115
An experiment was carried out at the International Rice Research Institute in 1987 to understand the seed germination and seedling development of rice and Echinochloa species. The percentage germination of rice cultivars(IR64 for lowland-type and UPLRi-5 for upland-type) was extremely high(>90%) regardless of temperature while that of Echinochloa species ranged from 10 to 80% depending on the species. Among these, E. crus-galli ssp. kispidula had the lowest germination with less than 20% at the high temperatures (
) and about 45% at the low temperature (
). Original seed weight gradually decreased with time white root and shoot weight increased for both rice and Echinochloa species. However, increase in root and shoot weight did not compensate for the loss of stored carbohydrate during the experimental period. The root of E. glabrescens grew from the seed on the opposite side of the shoot while for rice it grew from the same side of the seed as the shoot. Echinochloa glabrescens had a leaf blade-like expanded first leaf that contained chlorophyll while rice had an incomplete first leaf that had no leaf blade and no chlorophyll. Due to this E. glabrescens could grow independently 2 to 3 days earlier than rice.
Germination of Two Rice Cultivars and Several Weed Species
Kim, Soon-Chul ; Moody, Keith ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 116~122
An experiment was carried out at the International Rice Research Institute in 1987 to understand the seed dormancy and germination habit of rice and several weed species. The germinability of the weed seeds just after harvest was variable depending on the species and ranged from 0 to 72%. Two rice cultivars, IR64(lowland type) and UPLRi-5(upland type) had higher than 95% in germination ability throughout the experimental period due to the fact that the rice seeds came from the harvest of the previous season and dormancy had already been overcome. The length of the storage period needed to overcome dormancy at room temperature(
) was about 50 days for Echinochloa glabrescens Munro ex Hook, f., more than 60 days for E. crus-galli ssp. hispidula (Retz.) Honda and 20 days for Ludwigia octovalvis(Jacq.) Raven. Seeds of E. colona(L.) Link, Monochoria vaginalis(Burm. f.) Presl, Fimbristylis miliacea(L.) Vahl and Cyperus difformis L. appeared to have no dormancy. Among the nine species M. vaginalis had the lowest germination of less than 1% throughout the experimental period. However, its seed germinated easily when planted in soil. The low germinability of E. glabrescens, E. crus-galli ssp. hispidula and L. octovalvis just after harvest could be overcome through pretreatment of seeds either by soaking in nitric acid(0.1N) for 1 day or removal of the hull in the grass species, the nitric acid treatment being superior. The results imply that germination habit of weed species varied depending on the species through their differential dormancy period or differential germination strategy.
Characterization of Weed Occurrence in Major Horticultural Crops - II. Effects of Temperature and Moisture on Germination and Emergence of Weeds
Woo, I.S. ; Pyon, J.Y. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 123~129
1) Optimum temperature was
for C. bursa-pastoris,
for C. album,
for P. oleracea, A. lividus, E. crus-galli, D. sanguinalis, and 4 showed wide range of germination temperature. 2) Emergence of C. bursa-pastoris, and C. album was best at
of soil temperature, E. crus-galli at
, E. indica, A. lividis and P. oleracea at
and A. retroflexus and D. sanguinalis at
. 3) A. retroflexus and P. oleracea started to germinate at 30% water absorption stage and A. lividus, C. album, S. viridis, and D. sanguinalis at 40% and E. indica at 70%. 4) Germination of weed species was decreased as PEG 6000 induced osmotic potential lowered. C. album, P. oleracea, D. sanguinalis, A. lividus, and Solanum nigrum were germinated at -5.0 bar osmotic potential and C. album and P. oleracea were germinated at -7.0 bar.
Characterization of Weed Occurrence in Major Horticultural Crops - III. Phenological Aspects of Major Weeds
Woo, I.S. ; Pyon, J.Y. ; Guh, J.O. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 130~140
1) Dormancy brocken weed seeds were planted in soil at 15 days interval from June to December in 1986 and 1987 and test of normality and normal distribution curve were made to determine seasonal distribution characteristics of weed emergence in fields. Monthly emergence distribution pattern of each species can be concluded as following normal distribution equations. E. crusgalli
2) Emergence peak period of weed species tested were from the end of May to early August and yearly variation of emergence was observed in E. crus-galli, S. viridis, S, nigrum, and P. oleracea and this fact may more related to rainfall pattern rather than temperature.
Classification of Echinochloa Species Collected in Korea by Method of Seed Morphology and Their Response to Annual Herbicides
Kim, K.U. ; Kim, J.H. ; Lee, I.J. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 141~148
Echinochloa species collected from 13 places of Korea appeared to be morphologically very different. They were classified by Yabuno's seed morphology method into two species such as Echinochloa oryzicola and Echinochloa crus-galli which have two varieties such E. crus-galli var, cuss-galli and var, praticola. Among them, E. oryzicola was morphologically similar to Oryza sativa, but it had small leaf length with straight from, no awn, late heading and little interspecific variance. As compared with E. oryzicola, E. eras-galli var. crus-galli, and var, praticola showed a great variance exerting so difficulty in classifing them morphologically, particularly a great variance in leaf length, tiller number and grain size. E. oryzicola species showed the more sensitive response to butachor and thiobencarb herbicides than E. eras-galli var. praticola and var. eras-galli. However, E. eras-galli var. praticola was themore sensitive one to pretilachloa herbicide than such as E. oryzicola and E. eras-galli var. eras-galli, indicating that Echinochloa species might have a selective response to the annual herbicides tested.
An Identification of Volatile Terpenes in Allelopathic Weeds
Chun, J.C. ; Han, K.W. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 149~153
Volatile terpenes responsible for allelopathic activity in four weed species were identified using gas chromatography (GC) and GC-mass spectrometry. Artemisia asiatica Nakai contained 26 volatile terpenes, consisting of 16 monoterpenes and 10 sesquiterpenes, whereas there were only four terpenes in Trifolium repens L. and three terpenes each in Portulaca oleracea L. and Capsella bursa-pastoris (L,) Medik. Suspected allelochemics were
-phellandrene, 1,8-cineole, limonene,
-pinene, borneol, selinene, and caryophyllene in A. asiatica,
-caryophyllene in T. repens, and
-pinene in C. bursapastoris. No these compounds were found in P. oleracea.
Inhibitory Effects of Medicinal Plant Extracts and Identification of Inhibitory Substances
Kim, K.U. ; Lee, I.J. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 154~167
This study was conducted to determine the influence of various extracts from 21 medicinal plants including Bupleurm falcatum on the germination and growth of Lactuca sativa, Oryza native and E. crus-galli var. crus-galli, and the amount of their phenolic acids, fatty acids and organic acids, Water extract(5%) of all the medicinal plants, particularly Acorus gramineus, Cnidium officinale, Aconitum carmicheali, Bulpeurum falcatum, Zingiber officinale, Angelica gigas and Curcuma zeodaria inhibited over 90% of the lettuce seed germination and growth, indicating that medicinal plants contained the biologically active substances. The highest amount of phenolic compounds was observed in Prunus crmenica var, ansu(30.6013mg/g) followed by Aconitum ciliare(29.1008mg/g) and Cnidium officienale(27.2943mg/g) which inhibited markedly the germination of testing plants, showing the close relation of phenolic compounds to inhibitory effects. Cnidium officinale contained the highest amount of fatty acids(24.10mg/g) and organic acids(21.04mg/g) which may be partly related to inhibitory effects.
Intra- and Inter-specific Competition of Bulrush(Scirpus juncoides Roxb.)
Guh, J.O. ; Huh, S.M. ;
Korean Journal of Weed Science, volume 9, issue 2, 1989, Pages 168~173
In the characteristics of intra-specific competition according to bulrush density, the intra-specific competition in plant height began at 5 and 15% per pot in mixed culture and bulrush monoculture, respectively. The intra-specific competition in the shoot began at 5 plants per pot in both mixed culture and bulrush monoculture. The competition in dry matter weight began at 15 plants per pot in monoculture, and at 10 plants in mixed culture. On the rice density, the plant height, and numbers of shoot and dry matter weight in rice were rapidly increased up to 2.6, and 2.5 plants per pot, respectively, And then the increments were slow, The critical intra-specific competition of bulrush with rice was 2.5 to 3 plants per pot in their traits of rice, and especially the number of shoots and dry matter weights per pot showed significant decrements. In the different transplanting time in rice, the plant heights in both rice and bulrush elongated longer in mixed culture than in monoculture. The plant height of bulrush became shorter but the height of rice longer with late transplanting. The ratio of shoot number in rice to the number in bulrush was about 1 : 3 in all plots, and shoot numbers became less by late transplanting. The dry matter weight in both species were decreased by late transplanting, and the decrements were more prominent in bulrush than in rice.