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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 10, Issue 4 - Dec 1990
Volume 10, Issue 3 - Sep 1990
Volume 10, Issue 2 - Jun 1990
Selecting the target year
Discovery, Development and Distribution of Paraquat - Resistant Biotype Weeds in Japan
Watanabe, Yasushi ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 163~170
Effect of Thiobencarb on Various Agronomic Traits of Rice(Oryza sativa L.) Cultivars
Shin, D.H. ; Moody, K. ; Zapata, F.J. ; Kim, K.U. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 171~178
This study was conducted to determine which of the different agronomic traits of rice (Oryza saliva L.) has greater weight in predicting thiobencarb (S-[(4-chlorophenyl) methyl]diethylcarbamothioate) tolerance. Differences in plant height, tiller number, culm length, panicle number, and spikelet number per panicle between tolerant and susceptible cultivars were greater at the higher herbicide rate. However, days to heading and percent filled spikelets were not affected by herbicide rate. At the higher thiobencarb rate, the coefficients for all characters except plant height, tiller number, and percent filled spikelets were significant. Spikelet number per panicle and panicle number which had positive significant coefficients at both concentrations are the most useful indicators of total filled spikelets.
Genetic Analysis of Thiobencarb Tolerance in Rice(Oryza sativa L.)
Shin, D.H. ; Moody, K. ; Zapata, F.J. ; Kim, K.U. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 179~185
Five parents which showed differential response to thiobencarb and their
hybrids were treated with thiobencarb (S-[(4-chlorophenyl) methyl]diethylcarbamothioate) at 2 and 4 kg ai/ha in order to investigate the inheritance of rice (Oryza sativa L.) to the herbicide. In the analysis of diallel crosses for tolerance of rice cultivars to the herbicide, highly significant GCA (general combining ability) and SCA (specific combining ability) effects were observed at both herbicide rates using the parameters of plant height and dry weight ; the GCA effect being greater than the SCA effect. The additive effects appeared to be more prevalent than dominance effects, and partial dominance was recognized in relation to herbicide tolerance in the different rice cultivars. Higher heritabilities in the narrow and broad senses were observed at 4 kg ai/ha. The heritabilities in the narrow sense for plant height and dry weight were 0.726 and 0. 743, respectively. IR9660-50-3-1 which showed the highest GCA effects seemed to possess more dominant genes related to herbicide tolerance than the other rice cultivars tested.
Study on the Dormancy and Emergence of Eleocharis kuroguwai Ohwi
Im, I.B. ; Jun, B.T. ; Park, S.H. ; Guh, J.O. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 186~191
This experiments was conducted to investigate the dormancy of Eleocharis kuroguwai tuber in the earth and the influence of seeding time and depth on the emergence of Eleocharis kuroguwai. The tuber of Eleocharis kuroguwai on underground was formed the most amount between 10cm and 15cm layer and formed the second a lot of tuber in the soil layer between 5cm and 10cm, the third between the surface of the earth and 5cm, the least between 15cm and 20cm. The total mean emergence of tuber was 78%, and the dormant tuber was approximately 22% of total tuber formed during a year in the earth. The distribution of dormant tuber under the ground was about 42% between 15cm and 20cm, 39% between 10 cm and 15cm, 14% between 5cm and 10cm, and 5% between the surface of the earth and 5cm. The dormancy percent of tuber formed at each soil layer was about 60% between 15cm and 20cm, 21% between 10cm and 15cm, 12% between 5cm and 10cm, and 7% between the surface of the earth and 5cm. The emergence days of the tuber seeded at low layer was short, and the emergence rate was high, The tuber was formed much more on seeding at May 30th than June 30th.
Classification of Herbicidal Spectrum by Two-Dimensional Ordination Analysis in Soybean Field
Kang, B.H. ; Kim, H.S. ; Kim, T.W. ; Yong, P.S. ; Ahn, C.W. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 192~196
Eleven herbicides were treated in soybean fields of Dukso and Yeoncheon in Gyeonggi province. These herbicides were classified by two-dimensional ordination analysis based on important values of the weed flora which were obtained after application of herbicides. Weed community types were E. crus-galli(56%)-D. adscendens (14%) -C. album (10%)-P. oleracea (8%) and P. oleracea (58%)-E. crus-galli (29%) -A. mangostanus (5%) -D. adscendens (3%), respectively. From soybean field at Dukso, 11 weed community types or 11 herbicide groups were obtained. And at Yeoncheon, 9 weed community types or 9 herbicide groups were classified. At treated blocks with clomazone and bentazon, C. amuricus and E. crus-galli dominated respectively. And at treated blocks with quizalofop, haloxifop and alloxydium, P. oleracea dominated remarkably. The herbicides classification by the two-dimensional ordination analysis could be used more effectively to selecting herbicides for reciprocal and systematic weed control than by similarity analysis.
Effect of Soil Temperature and Planting Depth on Emergence and Growth of Perennial Paddy Weeds
Pyon, J.Y. ; Kang, T.G. ; Park, C.W. ; Kang, K.S. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 197~201
Emergence and growth of Potamogeton distinctus, Eleocharis kuroguwai, and Sagittaria pygmaea were examined at soil temperatures of 12, 15, 18, 22, 26, and
and 3 planting depth conditions. Optimum soil temperatures for emergence were 15-
, and 18-
for P. distinctus, E. kurogueai, and S. pygmaea, respectively. Emergence was delayed and growth became poor in three species as planting depths were increased and this trend was more significant in E. kuroguwai.
Controlled Release of Oxyfluorfen from the Variously Complexed Formulations - I. Model Study of Releasing Rate in Paddy Field
Guh, J.O. ; Kuk, Y.I. ; Chon, S.U. ; Kim, D.K. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 202~206
Field experiment was conducted to develop a model of controlled release of oxyfluorfen by using various split applications. Rice and some weed species was included in this study. The models of split applications were 10-10-0. 10-10-10. 20-20-0, 20-10-10. 20-20-20, 0-40-0, and 0-0-0g/Ha at 3days before transplanting, and 11 days after transplanting, respectively. Rice injury appeared dispeared at 20 g/Ha of oxyfluorfen on low leaf sheath but disappeared at few days. The injury was reduced by split application even at the same rate of application. However, no injury was siginificant at 30 days after transplanting. Barnyardgrass, Monochoria, and arrowhead were most susceptible to oxyfluorfen, but bulruch and most perennial weeds recovered after temporary growth inhibition. Therefore, to develop oxyflourfen for use in rice transplanting of adult rice seedling, split application with reduced rates, and development of expected to be tank-mixed or premixed with other perennial herbicides to obtain droad spectrum of weeds.
Controlled Release of Oxyfluorfen from the Variously Complexed Formulations - II. Selection of Promising Formulations
Guh, J.O. ; Im, W.H. ; Lim, K.P. ; Cho, C.S. ; Chung, I.W. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 207~213
Thirty formulations of oxyfluorfen(2-chloro-2,2,2-trifluoro-p-toyl 3-ethoxy-4-nitrophenyl ether were manufactured by adsorption and substitation. Of them 16 formulations n-ere selected because they showed rekatuvely high activity and long durability in the bioassay with (Brassica campestris V.L.) Then, the formulations selected and 4 commercial formulations were tested using Monochoria in pots. As the result, the formulations of polyer 11, elvan 7/40, coal-slag 7/40, zeolite(A), and bentonite(A) were selected because they showed almost complete inhibition of Monochoria even up the 73 days after treatment.
A Bioassay for Chemicals Affecting Plant Pigment Biosynthesis: Greening Assay
Kim, J.S. ; Kim, T.J. ; Hong, K.S. ; Hwang, I.T. ; Cho, K.Y. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 214~220
To establish a greening assay for screening, and physiological and biochemical studies of the compounds affecting biosynthesis of plant pigments, were conducted on environmental factors, and on ways of incubation and illumination which affect plant greening. Greening was good when both cucumber and barley were grown for 5 to 6 days at
in darkness, when adaxial sides of cucumber cotyledons were contacted with the solution, and when barley leaf fragments were taken 0.5 to 2.0cm from the leaf tip. Potassium phosphate buffer(pH 6.0) at 10mM was most desirable for plant greening. The speed of greening during illumination was increased as the temperature increased from
. The responses were sensitive more in cucumber than in barley, and in chlorophyll biosynthesis than in carotenoid biosythesis. The content of chlorophyll was greatest at the light intensity of 5000 and 1000 lux for cucumber and barley, respectively, but the biosynthesis of carotenoids were greatest at the light intensity higher than for chlorophyll. In use of solvents for dissolving chemicals, acetone, ethyl alcohol and DMSO at 10, 0.1 and 2.5% or less, respectively, did not affect the biosynthesis of plant pigments.
values were calculated for chemicals affecting pigment biosynthesis.
Separation and Identification of a Growth Inhibiting Compound from Aralia continentalis
Kim, K.U. ; Back, K.W. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 221~226
This experiment was performed to identify and isolate a growth inhibiting compound from Aralia continentalis. In order to isolate the growth inhibiting compound from Aralia continentalis the bioassay test of lettuce seed germination and rice seedling growth were used. Through these bioassays the growth inhibiting compound which was spotted at
0.51 on Tlc was isolated. This compound inhibited the lettuce growth by 79% at the concentration of 1000ppm. When sprayed with
reagent, it developed a bule spot. It had UV-absorbance at 217 nm and 342 nm, and
, C=O of
, C=C of
, and C-O of
on IR spectrum. Through HPLC analysis this compound was identified as a ferulic acid (
) having 25 min. retention time.
A Study of Mode of Action of Alachlor - I. Effects of Alachlor on Nucleic acid, Amino acid and Protein Synthesis in Oat(Avena sativa L.)
Kwon, S.W. ; Kim, J.C. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 227~232
The effects of alachlor [2-chloro-2', 6' diethyl-N-(methoxymethyl) acetanilide] treatment on nucleic acid, amino acid and protein synthesis were studied. The amide herbicide alachlor blocks the biosynthesis of the amino acids isoleucine, valine and aromatic amino acid in oat root tips. Nucleic acid was inhibited, but was not proportional to reduction in protein synthesis.
of alachlor treatment of oat roots inhibited 36% DNA synthesis, but DNA synthesis was not inhibited at
. RNA synthesis was inhibited by
of alachlor 16 and 27%, respectively, while inhibition of protein synthesis did occur at same concentrations. Inhibition of protein synthesis also did not occur at concentration below
alachlor. It suggest that inhibition of protein sythesis caused significantly by alachlor(
) result from secondary action.
A Study of Mode of Action of Alachlor - II. Effect of Alachlor on Peroxidase Synthesis in Oat(Avena sativa L.)
Kwon, S.W. ; Kim, J.C. ;
Korean Journal of Weed Science, volume 10, issue 3, 1990, Pages 233~239
The effect of alachlor treatment on peroxidase synthesis in oat root tips was studied. Alachlor caused increase in the amount of soluble peroxidase in oat root tips, peroxidase activity increase as the rate of alachlor application increased, Alachlor treatment of oats with
, peroxidase activity increased 0.20 unit higher than that of nontreatment. After 12hr, 65mM of peroxide treatment of oats inhibited 16% root growth, and 130 mM peroxide treatment caused 59% inhibition. With PAGE of peroxidase extracted from normal root tips, PAGE give 4 species(
band) of peroxidase. Alachlor significantly activated isoperoxidase. Three isoperoxidase(
) are synthesized at a increased concentration of alachlor, SDS-PAGE analysis of proteins extracted from oat root tips showed that they were made up of subunits blow 100 kD polypeptide.