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
Weed Occurrence and Current Status of Management in Rice Paddy Field Levee
So, Jae-Sung ; Lee, In-Yong ; Park, Jong-Hyun ; Park, Nam-Il ; Lee, Yong-Ki ; Park, Jae-Eup ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 299~308
This study was conducted to establish method of levee weed management with survey of weed occurrence and weed control method of levee in eco-friendly rice paddy field. In result of the nationwide weed survey, 85 weed species in 26 families were investigated at levee of eco-friendly rice paddy field in 2006. The abundant weed species are Compositae (27.1%), Poaceae (14.1%) and Cyperaceae (7.1%). In mountain area, Equisetum arvense, Agropyron tsukushinse var. transiens and Erigeron annuus etc. on May, Artemisia princeps, Digitaria ciliaris and Equisetum arvense etc. on October were dominated weeds. Equisetum arvense, Erigeron annuus and Artemisia princeps etc. on May, Echinochloa crus-galli var. oryzicola, Bidens tripartita and Digitaria ciliaris etc. on July and Digitaria ciliaris, Echinochloa crus-galli var. oryzicola and Mosla dianthera etc. on October were dominated weeds in hilly area. Erigeron annuus, Artemisia princeps and Alopecurus aepualis var. amurensis etc. on May, Echinochloa crus-galli var. oryzicola, Echinochloa crus-galli var. caudata, and Digitaria ciliaris etc. on July and Digitaria ciliaris, Artemisia princeps and Echinochloa crus-galli var. oryzicola etc. on October were dominated weeds in plain area. 61.8% among investigated farmers have been cutting weeds 4 times per year for weed management of levee in eco-friendly rice paddy field. Besides weed cutting method, farmers used several methods like as mulching, non-woven fabric, jute bag, heat-conservation materials and black polyethylene vinyl, at levee.
Selection of Insects for Potential Biological Control of Ambrosia trifida
Lee, In-Yong ; Park, Jin-Young ; Oh, Se-Mun ; Park, Jae-Eup ; Kwon, Oh-Seok ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 309~317
This study was conducted to control Ambrosia trifida occurred non-crop land, road side and river side by the potential biological control agents and investigate the basic ecology of these agents. In result of field survey, Ophraella communa and Epiblema sugii were finally selected as control agents. These insects were possible passage feeding in condition of normal temperature and life cycle of these insects from egg to adult were average 20 and 35.5 days O. communa and E. sugii, respectively. In result of test for host specificity on major 57 crops and plants, E. sugii had no effect on any crops and plants. While O. communa did injuried and layed egg on sunflower's leaves, they did not show completed life cycle. Visual weed control efficacy was 90% and total seed production was reduced to 24.8% by O. communa on A. trifida in laboratory experiments.
Monitoring of Imported Genetically Modified Crops in the Cultivated Fields in Korea
Park, Kee-Woong ; Kim, Chang-Gi ; Lee, Bum-Kyu ; Kim, Do-Young ; Park, Ji-Young ; Kim, Dae-In ; Kwon, Min-Chul ; Yi, Hoon-Bok ; Kim, Hwan-Mook ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 318~324
The cultivation area of genetically modified (GM) crops is increasing all over the world. Though the area currently cultivated for GM crops in Korea is zero, GM crop imports into the country for food and forage purposes are continuously increasing. This may encourage unintentional entrance of GM crops to the cultivated area. This study was conducted to investigate whether imported GM soybean, maize, and oilseed rape are unintentionally released for cultivation into cultivated fields in Korea. Monitoring was conducted in seven provinces and 31 sites in Korea from March to September 2007. A total of 237 plants of soybean, 154 plants of maize, and 2080 plants of oilseed rape were tested to find out the presence of GM crop. To detect GM soybean and maize, multiplex PCR was conducted using 35S promoter and nos terminator specific primers included in GM crops. The detection of glyphosate resistant GM oilseed rape was done using a lateral flow strip test kit. Based on the PCR analysis none of the surveyed soybean and maize was GM. Lateral flow analysis also showed no GM oilseed rape in the surveyed area. Based on the results of GM crop monitoring conducted from 2003 to 2007, no GM crops were found in the cultivated fields in Korea. However, continuous monitoring should be conducted to prevent the unintentional release of GM crops in the future.
Effect on Weed Occurrence According to Delayed Transplanting of Rice in Rice-Chinese Milk Vetch Cropping System in Central Area of Korea
Hong, Sun-Hee ; Shim, Sang-In ; Lee, Yong-Ho ; Na, Chae-Sun ; Kim, Kook ; Kang, Byeung-Hoa ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 325~333
This experiment was conducted to examine weed control effect of Chinese Milk Vetch (Astragalus sinicus, CMV) cultivation and different rice transplanting times in paddy field for introducing CMV cultivation to the central area of Korea. Conventional (with cv. Ilpumbyo) and CMV-linked delayed (cv. Odeabyo) transplanting time were 20 May and 18 June, respectively. When the rice seedlings were transplanted on same date, weed occurrence in paddy field following CMV cultivation was reduced to 38.8% of that in monocropping paddy field. Especially, Scirpus juncoides, a dominant species in the experimental fields, was strongly suppressed by CMV-rice cropping system. In non-CMV cultivated (monocropping) paddy field, delayed transplanting was effective on suppression of weed occurrence. Amount of weeds occurred in delayed transplanting field was 70.8% that of conventional transplanting. Under CMV-rice cropping system, occurred number and amount of weeds were 17.5 and 7.5% of those in conventional rice cultivation, respectively. Under the delayed transplanting of rice seedlings, the ratio of perennial to annual was 60.4：39.6, while that was 6.3：93.7 in conventionally transplanted paddy field. The CMV-rice cropping system was highly effective to reduce weed occurrence, especially, Echinochloa crus-galli was the most susceptible specices that showed the greatest reduction in occurrence.
Variation of Weed Occurrence and Rice Yield by Using the Cultivating Weeder for Three Years in Paddy Rice
Hwang, Jae-Bok ; Park, Sung-Tae ; Song, Seuk-Bo ; Lee, Bong-Chun ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 334~340
This study was conducted to determine a appropriate time for mechanical weed control and the weeders effect by the cultivating weeder (C.W.) at different transplanting in rice paddy fields. Control efficacy by C.W. was from 82.3 to 82.5% by the one time application (15 or 30DAT), and 87.1% by the two times of 15 fb 30 days after transplanting (DAT) under one crop system in 2004. However, when grew continuously during 2∼3 years under usage of C.W., control efficacy by C.W. was 66.0∼72.7% by the one time application and 59.0∼69.4% by the two times, respectively. On the other hand, control efficacy by C.W. was 83.6∼85.7% at the one time application on 10, 15, 20DAT, respectively, and 90.7∼91.4% at the two times of 10 fb 20 days and 10 fb 30 DAT in two crop system (2005). The control efficacy the second year was 23.7∼56.3% which had been similar with one crop system for 3 years. The cost of weed control by C.W. was 1.2 times higher than that of herbicides at 10 fb 20 DAT, but economical effect was higher 11% than that of herbicides treatment.
Effect of Transplanting Time on Leaf Development of Major Paddy Weeds in Late Transplanted Rice Field
Won, Jong-Gun ; Moon, Byeong-Chul ; Park, Jae-Eup ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 341~351
This study was carried out to obtain the basic information for estimating optimum herbicide application timing in late transplanted paddy rice. Based on the regression analysis, duration required for the emergences of the 1st, 2nd, 3rd and 4th leaves of weeds were 7.0~7.3, 9.4~10.7, 11.7~13.0 and 14.1~15.2 days after puddling in E. crus-galli, 4.2~6.6, 6.9~9.6, 9.6~12.8, and 12.3~15.9 days in Monochoria vaginalis, 7.9~9.7, 10.0~12.2, 12.2~14.6 and 14.3~17.1 days in Sagittaria trifolia L., respectively. The effective cumulative temperature required for the emergences of the 1st, 2nd, 3rd and 4th leaf of weeds were 91.9~89.7, 115.8~127.2, 147.8~164.8 and 179.8~ 202.3 in E. crus-galli, 43.3~50.4, 86.8~98.5, 128.4~147.3, and 160.2~173.8 in Monochoria vaginalis, 86.4~102.3, 126.3~137.0, 155.1~171.7 and 183.9~204.8 in Sagittaria trifolia L., respectively. In case of E. Kuroguwai, the plant height was investigated instead of the development of leaves, the days after puddling and the effective cumulative temperature required for 5, 10, 15, 20 cm of plant height were 13.2~16.5, 14.9~18.6, 16.9~20.6 and 18.5~22.6 days and 169.9~203.0, 201.0~235.6, 232.0~269.1 and 263.1~302.7 , respectively. In conclusion, as the transplanting time was delayed, the days to the indicated leaf age were shortened; however, the effective cumulative temperatures were increased. Therefore, the optimum herbicide application timing for effective controlling of weeds also changed depending on the kind of weeds and transplanting times.
Differential Susceptibilities and Herbicidal Characteristics of Newly Synthetic Hydantoin Derivatives
Park, Min-Sik ; Hwang, In-Taek ; Kim, Jin-Seog ; Ko, Young-Kwan ; Ryu, Jae-Wook ; Koo, Dong-Wan ; Kim, Tae-Joon ; Chun, Jae-Chul ; Choi, Jung-Sup ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 352~358
The herbicidal activities of several hydantoin derivatives possessing amide subgroup exhibiting symptoms as Protoporphyrinogen IX oxidase (Protox) inhibitor were compared to fluthiacet-methyl. Although both benzyl amide K-14795 and alkyl amide K-14867 had a high herbicidal activity to grass and broad leaf weeds with postemergence treatment in a greenhouse, the level of herbicidal activity of K-14795 was stronger than K-14867. Also, the effects of K-14795 on causing cellular leakage, chlorophyll loss and lipid peroxidation were much higher than K-14867. Two hydantoin derivatives had a typical characteristics as Protox inhibitor. Compared to broad leaf weeds, for example, grass weeds were significantly less susceptible to the K-14795 and K-14867 with simple bioassay on a typical treatment. In addition, the desiccation in the treated leaves with two derivatives was found only in the area where treated, since the translocation from the leaf tissuses was very limited. In conclusion, our results suggest that the hydantoin derivatives possessing amide subgroup have a high herbicidal activity to several weed species and benzyl amide among these derivatives may be the significant role in herbicidal characteristics.
Competitive Ability and Possibility of Increased Weediness of Transgenic Rice Tolerant to Abiotic Stresses
Park, Kee-Woong ; Kim, Chang-Gi ; Kim, Dae-In ; Yi , Hoon-Bok ; Lee, Bum-Kyu ; Kim, Hwan-Mook ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 359~365
A new trait of transgenic plants may alter competitive ability and consequently increase the possibility of weediness of the plants. This study was conducted to determine competitiveness of abiotic stress tolerant transgenic rice (Oryza sativa L.) expressing trehalose-6-phosphate synthase/ phosphatase (TPSP) fusion gene of E. coli. Competition between TPSP rice and its non-transgenic parental variety, Nakdong rice, was evaluated under greenhouse conditions using a set of replacement series experiments with five ratios and four plant densities. The plant biomass per pot of the TPSP and Nakdong rice was similar and corresponded to the theoretical response of two plants having equal competitiveness. Except the plant height, ANOVA for individual plant biomass, flag leaf area, and seed yield showed no ratio effect in the mixtures indicating no competition between TPSP and Nakdong rice. The competition study conducted under different nitrogen supply also showed no difference in the competitive ability between TPSP and Nakdong rice. We also could identify that TPSP and Nakdong rice seeds did not overwinter under the field condition. These results suggest that the trait producing trehalose is not associated with competitive ability in rice. So, the chance of weediness and invasiveness of TPSP rice is unlikely to be greater than those of Nakdong rice.
Differential Photodynamic Damages and Photoprotective Mechanism in Wild Type and Transgenic Rice Expressing Myxococcus xanthus Protoporphyrinogen Oxidase
Jung, Sun-Yo ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 366~373
We compared the effect of light duration and oxyfluorfen concentrations on photodynamic stress and photoprotective mechanism of wild type and transgenic rice that overexpressed the Myxococcus xanthus protoporphyrinogen oxidase (Protox) gene. Leaf squares of the wild type incubated with oxyfluorfen under illumination were characterized by a time-dependent increase in electro-conductivity, whereas transgenic lines M4 and M7 did not show any change with up to 100 M oxyfluorfen. In response to oxyfluorfen, chlorophyll contents decreased in wild-type line but increased in the transgenic lines. Wild-type line did not show any noticeable change in total carotenoids in response to oxyfluorfen, whereas the transgenic lines M4 and M7 increased total carotenoids with increasing oxyfluorfen concentrations. At 24 h after oxyfluorfen treatment, wild type showed a significant drop in Fv/Fm and qP and an increase in non-radiative energy dissipation through NPQ, whereas the transgenic lines did not show any change in the photosynthetic parameters. The protective response for the dissipation of photodynamic stress, NPQ, was induced to counteract the photodynamic stress, indicated by the decline in chlorophylls, Fv/Fm and qP in oxyfluorfen-treated wild-type plants. However, oxyfluorfen-treated transgenic plants suffered less photodynamic stress, confirming increased herbicidal resistance resulted from dual expression of M. xanthus Protox in chloroplasts and mitochondria.
Report on the
Asian.Pacific Weed Science Society Conference
Lee, In-Yong ; Moon, Byeong-Chul ; So, Jae-Seong ; Park, Jae-Eup ; Oh, Se-Mun ;
Korean Journal of Weed Science, volume 27, issue 4, 2007, Pages 374~381