Go to the main menu
Skip to content
Go to bottom
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 27, Issue 4 - Dec 2007
Volume 27, Issue 3 - Sep 2007
Volume 27, Issue 2 - Jun 2007
Volume 27, Issue 1 - Mar 2007
Selecting the target year
Enhanced Herbicidal Activity of Mixture of Cyhalofop-butyl and Metamifop Against Grass Weeds
Kim, Jin-Seog ; Choi, Jung-Sup ; Cho, Kwang-Yun ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 91~101
This study was conducted in a greenhouse to characterize herbicidal effects of mixturecombinations of cyhalofop-butyl and metamifoP, which are herbicides of aryloxyphenoxypropionatetype developed for the control of grass weeds in hce cultivation, especially bamyardgrass. Whenthe mixtures of cyhalofop-butyl and metamifop were foliar-treated to 8 species of grass weeds grownunder the upland condition, outstanding synergistic interactions were observed depending on themixing rates of the herbicides. In bamyardgrass, the synergism was significant 4 to 6 days afterapplication. When the mixtures of both compounds were treated on the water-surface under thesubmerged paddy condidon, synergistic interactions were also observed depending on the mixingrates of the herbicides. However, to obtain an equal degree of herbicidal activity, greater amountof herbicide was required in water-surface treatment than in foliar-treatment. The appearing degreeand rapidity of herbicidal symptoms (chlorosis/desiccaton m developed leaves) were differentaccording to chemicals and application rates. The necessary time for 40% herbicidal activity tobamyardgrass was 13.5, 10, and 4.2 day in 20 g ha'U cyhalofop-butyl, 20 g ha'U metamifoP, and 20 gha' cyha1ofop-buty1+20 g ha'U metamifoP, respectively. When the total amount of active ingredientin the mixture of cyhalofbp-butyl and metamifop was fixed and mixture rate was changed, the rangeof cyhalofop-butyl and metamifop from 3 : 1 to 1 : 5 remarkably enhanced herbicidal activity.Especially, the mixture rate of 1 : 1 or 1 : 2 showed better herbicidal efficacy. The application raterequired to completely control bamyardgrass of 6 leaf stage was approximately 125 g ha'U inmetamifbp and 60 g ha"U in cyhalofop-butyl+metamifoP (1 : 1 or 1 : 2). Consequently, the mixture ofcyhalofop-butyl and metamifop has a synergistic interaction and induced more rapid control of bamyardgrass. Therefore, it is prospected that the mixture could be used as selective post-emergenceherbicides for grass weed control in rice cultivation, especially for bamyardgrass.
Effect of Densities of Echinochloa crus-galli and Cyperus difformis in Transplanting Rice Cultivation on Rice Yield and Rice Quality, and Economic Threshold Levels of the Weeds
Kwon, Oh-Do ; Cho, Seung-Hyun ; Moon, Byeong-Chul ; Kuk, Yong-In ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 102~111
This study was conducted to find the levels of reduction in rice yield and rice quality as affected by densities of Echinochloa crus-galli and Cyperus difformis in transplanted rice cultivation of two sites (Naju and Iksan) and to determine economic threshold levels of the weeds. The yield of rice in densities of E. crus-galli (96 per m2) and C. difformis (576 per m2) was reduced by 51∼60 and 18∼19%, respectively. Head rice was obviously reduced by increasing occurrence densities of E. crus-galli, and immature rice and damaged kernel were increased with increasing occurrence densities of E. crus-galli, whereas only immature rice was increased with increasing occurrence densities of C. difformis. However, there were no significant differences in other the rice quality such as protein and amylose as affected by densities of E. crus-galli and C. difformis. Regression equations for prediction models of rice yield loss on densities of E. crus-galli and C. difformis were Y=599.3/ (1+0.010568X) r2=0.961, and Y=613.1/(1+0.000403), r2=0.857, respectively, in Naju, whereas, Y=544.7/(1+0.017220X) r2=0.953 and Y=556.5/(1+0.000730X) r2=0.854, respectively in Iksan. The competitiveness of E. crus-galli was 23.8∼26.2-fold higher than that of C. difformis. Economic threshold densities of E. crus-galli and C. difformis calculated by Cousens' method (1985)were 0.8∼1.1 and 27.8∼28.8 per m2, respectively. This result means that yield of rice in transplanted rice cultivation can be reduced by more than the economic threshold densities of E. crus-galli and C. difformis.
Studies on the Vegetation of Naturalized Plants in Jeju Island
Yang, Young-Roan ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 112~121
This study relates to the naturalized plants in Jeju island. The life form, origin and time of introduction of those naturalized plants were grasped by the documentary survey, and the field was surveyed thereof. The study results can be summarized like the below.First of all, the naturalized plants are be newly defined as the "plants being the non-native species in a bio-geographic province area, which are introduced thereto from the area with a different accidentally or artificially, bio-geographic environment and well adapted to the new environment while establishing a natural ecosystem."Second, it was found that the naturalized plants were total 205 taxa including 190 specifies, 13 varieties and 2 cultivar, which belong to 121 genera and 37 families. In relation to the classification per the families, there were 43 taxa of Compositae (21%), 32 taxa of Gramineae (15.6%), 17 taxa of Leguminosae (8.3%), and 13 taxa of Cruciferae (6.3%). Third, the life forms of the naturalized plants were there 92 taxa of annual plants, 30 taxa of biennial plants, 19 taxa of annual or biennial plants, 58 taxa of perennial plants, and 6 taxa of trees. Fourth, the naturalized plants, 89 taxa there of were originated from America, 71 taxa from Europe, 25 taxa from Asia, and 20 taxa from other provinces. Lastly, among the naturalized plants, 39 taxa thereof had been introduced into Jeju-Do before 1921, 23 taxa from 1922 to 1963, and 143 taxa since 1964.
Effect of Several Herbicides on Blyxa aubertii L. and Chara braunii Gmelin in Paddy Field
Kwon, Oh-Do ; Kuk, Yong-In ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 122~131
This study was conducted to understand controlling effects on the Btyxa aubertii L.and Chara braunii Gmelin by soil-applied herbicides at different application times. The number ofleaves of B. aubertii at 7, 10, and 15 days after harrowmg (DAH) was 1.2, 4, and 8.8, respectively.B. aubertii could be controlled by other herbicides having different modes of action from sulfonylureaherbicides, such as benzobicyclon, oxadiazon, benzobicyclon+pretilachlor, and fentrazamide whenthey were applied at 0 DAH, carfentrazon, Pryrazolate+butachlor, and bensulfuron+fentrazamidewhen they were applied at 7 DAH, Pyrazosulfuron+fentrazamide, benfuresate+bifenox, Pyrazosu1furon+pyrazolate+simetryn, thiobencarb+simetryn, and pyrazosulfuron+mefenacet when they were appliedat 13 DAH. However, the B. aubertii was controlled only 31-84% by the recommended rate and2 times of recommended rate of azimsulfuron and controlled 35-70% by sulfonylurea herbicide-based mixtures, azimsulfuron+thiobencarb, Pyrazosulfuron+indanofan, Pyrazosulfuron+molinatepyrazosulfuron+pyriminobac, and cinosulfuron+pyriftalid when they were applied at 7 and 13 DAH.On the other hand, Chara braunii could be controlled over 92% by oxadiazon and butachlor whenthey were applied at 0 DAH, butachlor when it was applied at 7 DAH, and pyrazosu1furon+fentrazamide, benfuresate+bifenox, thiobencarb+simetryn, and pyrazosulfuron+mefenacet when theywere applied at 13 DAH. However, similar to the B. aubertii, the Chara braunn was controlled only18-35% by the recommended rate and 2 times of recommended rate of azimsulfuron and controlled12-54% by sulfonylurea herbicide-based mixtures, bensulfuron+butachlor, bensulfuron+thiobencarb,azimsulfuron+thiobencarb, Pyrazosulfuron+molmate, bensulfuron+benfuresate, Pyrazosu1furon+carfentrazon+pyriminobac, Pyrazosulfuron+pyriminobac and cinosulfuron+pyriftalid when they were applied at 7 and 13 DAH. Thus, results from these experiments indicate that the B. aubertii andChara braunii from the paddy fields in Choimam province may be resistant to sulfonylureaherbicides.
Effects of Organic Materials on Growth of Rice and Paddy Weeds
An, Xue-Hua ; Lee, Sang- Bok ; Im, Il-Bin ; Kim, Sun ; Kim, Jai-Duk ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 132~139
The purpose of this research is to investigate impact of the organic mixture materials (OMM) and mixture oil cake (MOC) on the early growth of direct-seeded rice, transplanted rice, Echinochloa crus-galli (Echinochloa crus-galli var. formosensis Ohwi.) and Aneilema keisak Hassk. Direct-seeded rice and transplanted rice are both treated with 0.63~1.88ton ha-1 organic mixture materials and mixture oil cake respectively. The mortality rate in direct-seeded rice was 42.1~71.2% and 30.0~85.2%, whereas growth of transplanted rice was improved 8.1~25.7% and 2.8~11.0%. Direct-seeded rice and transplanted rice are both treated with 1.88ton ha-1 organic mixture materials and mixture oil cake respectively. The weed that died about 52.8% and 38.9% was Echinochloa crus-galli, and the root of the weed was suppressed by 81.9% and 83.1%, the shoot by 53.1% and 60.5%. Small quantities of organic mixture materials and mixture oil cake also were highly effective in controlling Aneilema keisak Hassk. The organic materials have significant inhibition effect on direct-seeded rice, Echinochloa crus-galli and Aneilema keisak Hassk after 0~3 days, 0~5 day and 0~7 days treatment. The dissolved oxygen increased evidently as the time pass after treatment. The oxidation-reduction activity continued to increase rapidly. These results suggest that the organic mixture materials and the mixture oil cake seems to contain an active ingredient that are effective in killing weeds.
Weeding Efficacy of Cultivating Hairy Vetch (Vicia villosa Roth) as a Cover Crop in Orchard
Yoo, Young-Chae ; Song, Beom-Heon ; Oh, Seong-Hwan ; Choi, Nag-Geo ; Lee, Chul-Won ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 140~147
Hairy vetch (Vicia villosa Roth) with high Nitrogen and strong regrowth at early spring is being cultivated as green manuaring and cover crops in the field. This study was conducted to examine weed control efficacy by cultivation of hairy vetch as a cover crop through hairy vetch cultivation management in pear orchard. When hairy vetch as cover crop was applied in pear orchard, the occurrence of winter annuals, Capsella bursa-pastoris, Draba nemorosa, Youngia japonica, Veronica didyma, Hemistepta lyrata, Alopecurus aequalis, Poa annua and Artemisia princeps, perennials, were reduced at spring season and summer anuals, Echinochloa crus-galli, Setaria viridis, Erigeron canadensis, Erigeron annuus, Persicaria hydropiper, Acalypha australis and Artemisia princeps, perennials, were reduced in summer season by 5kg 10a-1 level seeded in the autumn former year. Weeding efficacy by tillage treatment in late summer after withering of hairy vetch plant at mid-July was effectve highly.
Impact Assessment of Main Herbicides to Aquatic Plants in Paddy Farming System of Korea
Park, Tae-Seon ; Kim, Chang-Seok ; Moon, Byeong-Chul ; Cho, Jeong-Rae ; Kang, Chung-Kil ; Kwon, Oh-Do ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 148~156
These studies were conducted to evaluate the possibility of using them as indicator species for biodiversity conservation from and the response of some aquatic plants to herbicides which have been used widely in rice-cropping areas in Korea. The aquatic plants seen in paddy farming system of Kangwon province where butachlor has been used mainly for many year, were much more varied than those surveyed in paddy farming system of Chonnam province where sulfonylurea herbicides (SUs) have been used continuously for many year. The effects of bensulfuron- methyl (BSM) and pyrazosulfuron-ethyl (PSE) of sulfonylurea herbicides (SUs) to Monochoria korsakowii (M. korsakowii), Marsilea quadrifolia (M. quadrifolia), and Salvinia natans (S. natans) which are aquatic species listed as threatened species by the Environment Agency of Japan, much more effective than those to butachlor and molinate. The GR50 values of BSM and PSE to aquatic plants tested were relatively very low compared with those of butachlor and molinate. The concentrations of SUs which may affect the growth aquatic plants detected in water collected from irrigation ditches of rice fields treated with SU-included herbicides. Acetolactate synthase (ALS) activity isolated from M. quadrifolia was seriously inhibited even at very low concentration of BSM and PSE.
Growth Responses of Diclofop-Resistant and -Susceptible Italian Rvegrass (Lolium multiflorum Lam.) Biotvpes to Various Environmental Stresses
Kuk, Yong-In ; Kwon, Oh-Do ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 157~165
The resistant Italian ryegrass biotype was 148-fold more resistant to diclofop than the susceptible biotype based on GR50. Growth chamber and greenhouse studies were conducted to compare the growth of diclofop-resistant and -susceptible Italian ryegrass (Lolium multiflorum Lam.) biotypes under various environmental stresses such as drought, low or high temperatures, mowing, and flooding. The germination rates in the diclofop-resistant Italian ryegrass biotype were lower than those in the diclofop-susceptible biotype at 10 and 20 . The diclofop-resistant and -susceptible Italian ryegrass biotypes had similar plant height, number of leaves, and shoot dry weight under noncompetitive conditions. The diclofop-resistant and -susceptible Italian ryegrass biotypes had also similar plant height, number of leaves, and shoot dry weight under various environmental stresses such as drought, low or high temperatures, and flooding. However, the regrowth rate in diclofop- resistant Italian ryegrass biotype after mowing was higher than that in diclofop-susceptible biotype. These results suggest that resistance to diclofop is not associated with the reduced fitness of the resistant Italian ryegrass biotype.
Distribution Status of Cuscuta spp. in Southern Parts of Korea and Germination Characteristics of C. pentagona
Kim, Chang-Seok ; Moon, Beyung-Chul ; Oh, Se-Mun ; Kuk, Yong-In ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 166~172
Surveys were conducted to establish the current distribution pattern and host range on four species of genus Cuscuta in southern parts of Korea. Cuscuta japonica, C. australis and C. chinensis were rare native species, but C. pentagona, exotic species, was widespread in natural habitats. In southern parts of Korea, C. pentagona has been recorded as a parasite on 127 herbaceous and woody plants. Soaking C. pentagona seeds in concentrated sulfuric acid was very effective on its germination. Seeds of C. pentagona germinated at constant temperature from 15 to 35 with optimum germination at 30 and 35 , and at alternate temperature from 20/10 to 35/25 (day/night; 12/12hrs.) with optimum germination at 35/25 . Seedlings of C. pentagona were emerge at soil gravimetric water content from 10 to 30% with optimum emergence at 20 and 30%. Seedlings of C. pentagona were able to emerge from depths as great as 6cm.
Anaerobic Metabolism in Rice and Barnyardgrass Plants Under Low Oxygen Stress
Kim, Sung-Eun ; Cho, Kwang-Min ; Seol, Young-Mi ; Kim, Yong-Doo ; Ko, Jong-Cheol ; Kim, Bo-Kyeong ; Kim, Chung-Gon ; Chun, Jae-Chul ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 173~179
Enzyme activities of anaerobic metabolism and the anaerobic metabolites were determined for direct-seeded rice and grass weeds subjected to low oxygen stress condition. Difference in activity of lactate dehydrogenase (LDH) in shoots of the test plants between aerobic and anaerobic conditions was the greatest in weedy rice, while the LDH activity was relatively low in Iksan-429 and Joonambyeo and the difference between the two oxygen conditions was not great. The LDH activity in roots of the plants reached only about 30% of the shoots and very high LDH activity under anaerobic condition as compared with under aerobic condition was found in roots of barnyardgrass. In all the test plants activity of alcohol dehydrogenase (ADH) was high under anaerobic condition than under aerobic condition. Relatively high ADH activity was obtained from Donganbyeo, Dongjinbyeo, and Echinochloa species which showed anaerobic tolerance. Anaerobic metabolite acetaldehyde was produced more from both shoots and roots of the test plants under anaerobic condition than under aerobic condition and the greatest difference between the two oxygen conditions was determined in Dongjinbyeo. However, no acetaldehyde in the hydroponic media was detected from the test plants. Release of anaerobic metabolite ethanol to the hydroponic media of all the test plants was high in anaerobic condition than in aerobic condition. This effect was particularly obvious with Echinochloa species. A similar trend was also found about ethanol contents in both shoots and roots of all the test plants. These results suggested that activities of LDH and ADH and production of anaerobic metabolite, acetaldehyde and ethanol, are criteria, exhibiting anaerobic tolerance of submerged direct-seeded rice and grass weeds. Among them, ADH activityin roots of the plants was considered as the most reliable indicator showing anaerobic tolerance of the plants under low oxygen stress.
Effect of Tanysphyrus (Tanysphyroides) major Roelofs (Coleoptera : Curculionidae), a Potential Biological Control of Monochoria vaginalis
Park, Jin-Young ; Lee, In-Yong ; Park, Jae-Eup ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 180~183
This experiment was conducted to get basic data for biological control of monochoria (Monochoria vaginalis). One M. vaginalis plant was chosen for the Tanysphyrus (Tanysphyroides) major releasing experiment. Every caged plant in amount of 2, 4 and 8 pairs released adult insect, both females and males. It investigated the control effect of M. vaginalis. T. (T.) major adults when input 2 and 4 pairs, necessary time were required 30 days for biological control of M. vaginalis, and new adults investigated number of 20 1 and 9 1, respectively. And case of 8 pairs was 20 days, and new adults investigated number of 5 1. Also, M. vaginalis did not reproduced in each experimental plot, and their seed did not produced.
Effects of Wood Vinegar Mixed with Cyhalofop-butyl+bentazone or Butachlor+chlomazone on Weed Control of Rice (Oryza sativa L.)
Rico, Cyren M. ; Mintah, Lemuel O. ; Souvandouanel, Souliya ; Chung, Il-Kyung ; Shin, Dong-Il ; Son, Tae-Kwon ; Lee, Sang-Chul ;
Korean Journal of Weed Science, volume 27, issue 2, 2007, Pages 184~191
The effects of combined treatments of wood vinegar and commonly used foliar and soil-applied herbicides on weed control, yield and yield components, and quality of rice were investigated. The herbicides tested were cyhalofop-butyl+bentazone and butachlor+chlomazone. Treatments used were recommended (RH：100%) application rate, half-recommended (HRH：50%), HRH+500 wood vinegar, and HRH+1000 wood vinegar.This study showed that cyhalofop-butyl+bentazone obtained significantly higher efficacy in HRH+ 1000 wood vinegar compared to HRH alone. However, no butachlor+chlomazone treatment obtained significantly higher efficacy compared to HRH alone. In cyhalofop-butyl+bentazone, highest rice yield was obtained in HRH+1000 wood vinegar. In case of butachlor+chlomazone, a decreasing rice yield from RH to HRH plus wood vinegar treatments was obtained. Spikelet number and ripening ratio are the mainly affected yield component parameters while the other parameters did not show significant variations in values with wood vinegar treatment. There was no clear trend on the effects of treatments on grain appearance and nutritional quality.