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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Weed Science
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Journal DOI :
The Korean Society of Weed Science
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Volume & Issues
Volume 26, Issue 4 - 00 2006
Volume 26, Issue 3 - 00 2006
Volume 26, Issue 2 - 00 2006
Volume 26, Issue 1 - 00 2006
Selecting the target year
Environmental Factors Affecting the Herbicidal Performance of Flucetosulfuron
Lee, Jong-Nam ; Kim, Do-Sun ; Hwang, Gi-Hwan ; Gu, Seok-Jin ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 1~9
This experiment was conducted to investigate the effects of temperature, light, water depth, rainfall, run-off and N-fertilizer on the activity of flucetosulfuron in the glasshouse. The herbicidal activity of flucetosulfuron against Echinochloa spp. was slightly reduced under low temperature of 20 and shaded conditions. The activity was also slightly reduced at deep water of 6 cm after soil application, but not significantly affected by water depth at the time of foliar application. Water run-off significantly decreased the herbicidal activity, with LT90 (days required to achieve more than 90% weed control) values of 3.4 and 6.7 days for 50% and 100% run-off, respectively, indicating that at least 4-7 days of run-off-free period were required to get more than 90% weed control. Rainfall subsequently 1 hr after foliar application did not affect the activity seriously. Increasing the level of soil basal N-fertilizer tended to increase herbicidal efficacy of flucetosulfuron.
Selectivity of Pyribenzoxim and Bispyribac-sodium Between Echinochloa crus-galli and Rice (Oryza sativa)
Hwang, Gi-Hwan ; Kim, Do-Sun ; Lee, Jong-Nam ; Gu, Seok-Jin ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 10~18
Dose-response studies were conducted to compare herbicidal activity and rice selectivity of pyribenzoxim and bispyribac-sodium. When tested with formulations at the constant adjuvant concentration regardless of herbicide dose, the GR90 value (the rate required to inhibit growth by 90%) of pyribenzoxim for barnyardgrass was 8.7 g ai ha-1, while that of bispyribac-sodium was 7.7 g ai ha-1. The GR10 values (the rate required to inhibit growth by 10%) of pyribenzoxim and bispyribac- sodium were 93.3 g and 2.9 g ai ha-1 for Japonica rice and 185.8 and 23.9 g ai ha-1 for Indica rice, respectively. The selectivity indices (GR10 for rice/GR90 for barnyardgrass) of pyribenzoxim for Japonica and Indica rice were 10.7 and 21.3, respectively, while those of bispyribac-sodium were 0.4 and 3.1, respectively. Therefore, selectivities of pyribenzoxim were 6.8 and 28.0 folds greater for Japonica and Indica rice, respectively, than those of bispyribac-sodium. In addition, the selectivity indices of technical ingredients of pyribenzoxim and bispyribac-sodium were 1.5 and 0.5, respectively, showing about 3 folds difference. The selectivity indices of their formulations tested with no adjustment of adjuvant concentration were 1.2 and 0.5, respectively, showing 2 folds difference. These results thus demonstrate that although pyribenzoxim and bispyribac-sodium are similar in herbicidal activity to barnyardgrass, pyribenzoxim is a vastly advanced herbicide in rice selectivity.
Characteristics of Weed Flora in Pasture of the Jeju Island
Park, Jae-Eup ; Lee, In-Yong ; Kim, Chang-Seok ; Park, Tae-Seon ; Jo, Jeong-Rae ; O, Se-Mun ; Mun, Byeong-Cheol ; Gwon, O-Seok ; Park, Nam-Il ; Ji, Seung-Hwan ; Gang, Dae-Seong ; Jeong, Gyeong-Im ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 19~28
This study was conducted to determine dynamics of weed flora in pasture of the Jeju island in Korea, carried out by the National Institute of Agricultural Science and Technology in 2004. Weeds occurred in pasture were 55 species belonging to 24 families in May and 68 species of 30 families in September. In total, weed observed in pasture were 94 species belonging to 33 families. Dominant weed species were Rumex acetosella, Artemisia princeps and Veronica tenella etc. in May and Digitaria ciliaris, Cyperus iria and Potentila anemonefolia etc. in September. Among 55 families, Asteraceae (20.0%) including 11 weed species was the biggest family, followed by Caryophyllaceae of 6 species (11.0%), and Polygonaceae, Scrophulariaceae and Rosaceae of 4 species (1.5%), respectively in May. Among 30 families, Asteraceae (17.6%) including 12 weed species was the biggest family, followed by Poaceae of 10 species (14.7%) and Polygonaceae of 4 species (5.9%), respectively in September. These weeds were composed of 33 annual species, 17 biennial species and 44 perennial species. Exotic weeds occurred in pasture of the Jeju island were 18 species belong to 10 families, dominated weeds were Rumex acetosella and R. obtusifolius.
Weed Flora of Pasture in Korea
Park, Jae-Eup ; Park, Tae-Seon ; Song, Seok-Bo ; Im, Il-Bin ; Hwang, Jae-Bok ; Lee, In-Yong ; Kim, Chang-Seok ; O, Se-Mun ; Jo, Jeong-Rae ; Gang, Jong-Guk ; Kim, Seon ; Mun, Byeong-Cheol ; Gwon, O-Seok ; Kim, Gwang-Ho ; Park, Jong-Hyeon ; Park, Nam-Il ; Ji, Seung-Hwan ; Gang, Dae-Seong ; Jeong, Gyeong-Im ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 29~49
The surveys of weed population on pasture from May to September were conducted to investigate information on weed flora and their ecology in 2004. Weeds of pasture were composed of 333 species belonging to 59 families. These weeds were composed of summer annual weeds of 108 species (22.3%), winter annual weeds of 66 species (19.8%) and perennial weeds of 159 species (47.9%). Among 59 families, the Asteraceae was the biggest family, followed by Poaceae, Polygonaceae, Rosaceae and Cyperaceae, respectively. Dominant weed species were Artemisia princeps, Rumex acetosella, Trifolium repens, Erigeron annuus and Alopecurus aequalis var. amurensis on May, and Artemisia princeps, Taraxacum mongolicum, Digitaria ciliaris, Echinochloa utilis and Setaria viridis etc. on September. Exotic weeds on pastures were Trifolium repens, Rumex acetosella, Erigeron annuus, Veronica arvensis etc. Compared with the survey done in 15 years ago(1990), Conyza canadensis var. canadensis, Potentilla fragarioides, Sanguisorba officinalis and Viola mandshruica etc. were decreased in number, but Artemisia princeps, Rumex acetosella, Trifolium repens, Digitaria ciliaris, Setaria viridis and Echinochloa utilis etc. were more increased.
Effects of Covering Materials to Survival Rate of Rhizome and Weeds Occurrence in Wintering of Saururus chinensis Baill
Nam, Sang-Yeong ; Kim, In-Jae ; Kim, Min-Ja ; Lee, Cheol-Hoe ; Yun, Tae ; Park, Seong-Gyu ; Lee, U-Yeong ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 50~55
This experiment was conduct To investigate the effects of heat conservation materials to prevent freeze damage and weed occurrence during overwintering of Saururus chinensis. Temperature difference between daily maximum and minimum temperature by chaff was 6.9 , and was lower ranged from 9.7 to 14.4 compared with those of other materials. Heat conservation index, calculated from average temperatures below -10 of earth's surface during the winter, chaff and lagging that of was higher 1.7 and 1.5 compared with that in straw respectively. Relative humidity Preservation of water is greater 9.6∼26.1% in covering than in open field, and it increased in the order of lagging>chaff>straw among heat conservation materials. The survival rate of rhizome was increased in the order of 99% in lagging>75% in chaff>58% in straw, 32% in open field after overwintering. Budbreak began fast, and the numbers of total budbreak per unit area were greater 22 times in lagging than open field. Weeds occurrence was decreased in covering, i. e., 12.0∼33.2 units m2-1, 7.3∼10.7 kg 10 a-1 of dry weight, and 5.6∼6.4 hours 10 a-1 of labor input compared with 157.2 units m2-1, 28.9 kg 10 a-1 of dry weight, and 65.7 hours 10 a-1 of labor input in open field.
Yield of Rice as Affected by Density of Common Reeds (Phragmites communis Trin.) and Controlling Efficacy of Common Reeds by Foliar Applied Herbicidesin Reclaimed Paddy Fields
Gwon, O-Do ; Guk, Yong-In ; Kim, Seok-Eon ; Park, Hong-Gyu ; Sin, Hae-Ryong ; Choe, Hyeong-Guk ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 56~63
Herbicidal Effect of 5-Aminolevulinic Acid on Barnyardgrass and Indian Joint-vetch Under Different Environmental Conditions
Im, Bo-Yeong ; Gwon, O-Do ; Kim, Gyeong-Mun ; Gu, Ja-Ok ; Guk, Yong-In ; Cheon, Sang-Uk ; Jeong, Seon-Yo ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 64~70
The objective of this study was to determine the herbicidal effect of 5-aminolevulinic acid (ALA) on barnyardgrass and Indian joint-vetch under different temperatures, light intensities, and water levels. ALA at 1, 3, 5, 10, and 30 mM concentrations was applied to 1.5-leaf stage of the two weed species, and then were determined plant height and shoot fresh weight at 10 days after treatment. There was no significant difference in the herbicidal effect of ALA on barnyardgrass and Indian joint-vetch between temperature conditions: 10℃, 20℃, and 30℃ except for 30℃ in Indian joint-vetch. The herbicidal effect of ALA was lower in 20 μmol m-2 s-1 than in 200 and 400 μmol m-2 s-1 in the two weed species. However, the herbicidal effect on the two weed species was not differ between the 200 and 400 μmol m-2 s-1. The herbicidal effect of ALA on barnyardgrass was not differ among water conditions: proper watered for plants (control), saturated (100% water level) and flooded (half of plants are flooded). But, the herbicidal effect of ALA on Indian joint-vetch was higher in saturated condition than in proper watered condition (control) and flooded conditions. On the other hand, the herbicidal effect of ALA on the two weed species was higher in barnyardgrass than in Indian joint-vetch under different temperatures and light intensities. However,the herbicidal effect was similar between the two weed species under water conditions. Also, the herbicidal effect of ALA on the two species generally increased with increasing ALA treatment concentrations except for some concentrations. The two species almost died when ALA was applied at higher concentration: 30 mM under different envrionmental conditions except for lower light intensity, 20 μmol m-2 s-1.
The Characteristics of Growth on Sagittaria trifolia L. of Seed and Tuber Propagations
Gwon, O-Do ; Guk, Yong-In ; Cheon, Gwang-Pil ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 71~79
The objectives of this study were to compare emergence of seeds collected from Buyeo and Naju under different environmental conditions such as lightness, temperatures, burial depths in soil, and water depths, and to compare early growths, seed formations, and tuber productions of seeds and tubers collected from Buyeo and Naju in a greenhouse. The emergence rate was higher in light conditions than in dark conditions, regardless of the sites from which the seeds were collected. On the other hand, needed periods for the emergence and emergence rates were shorter and higher in seeds collected from Buyeo than in seeds collected from Naju. An optimum temperature for arrowheads under lightness condition was 20∼25 regardless of the sites from which the seeds were collected. The emergence rates in seeds collected from Buyeo and Naju were about 20% and 2.7%, respectively, in a Petri dish. However, the emergence rate in seeds collected from Buyeo and Naju, when the seed was seeded in soils, were 65% and 44%, respectively. The possible burial depth in soil for emergence of seeds was within 2 cm. Although the possible water depth for the emergence of seeds was 10 cm, the number of individual and plant height was significantly decreased compared to saturated condition (0 cm). The flowering time of arrowheads grown from seeds was 50 days after seeding: the flowering time was 9 days later than that of tubers. On the other hand, the number of peduncle and achene in arrowheads grown from seeds were smaller than in tubers, but the number of seed formation per achene in arrowheads grown from seeds was larger than in tubers. The number of tuber formation was 81 in arrowheads grown from tubers, and was 21 to 36 in arrowheads grown from seeds. However, the amount of tuber formation was similar between in arrowheads grown from seeds collected from Buyeo and arrowheads grown from tubers.
Effect of Soil and Foliar Applied Herbicides on Sagittaria trifolia L. of Seed Propagation
Gwon, O-Do ; Guk, Yong-In ; Cheon, Gwang-Pil ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 80~88
본 실험은 부여와 나주 지역에서 수집한 종자번식 벗풀을 이용하여 설포닐우레아계 제초제에 대한 저항성 여부와 처리시기별 토양처리제초제와 경엽처리 제초제에 의한 방제 가능성을 알아보기 위하여 수행하였다. 부여와 나주 수집종 모두 설포닐우레아계 제초제, imazosulfuron, bensulfuron 및 pyrazosulfuron의 추천량 뿐만 아니라 추천량의 1/2량에서도 완전 방제가 되는 점으로 미루어 이들 수집종은 설포닐우레아계 제초제에 대해 감수성으로 확인되었다. 이들 수집종에 대한 파종직후 토양처리제초제의 방제효과(thiobencarb, pretilachlor, oxadiazon 및 fentrazamide)는 부여 수집종에서 70∼97% 정도, 나주 수집종에서는 92% 이상의 방제효과를 보였다. 또한, 파종 후 7, 17일에 토양처리제초제 방제효과는 수집종에 관계없이 Pyrazolate 또는 설포닐우레아계 혼합제 처리에서 각각 98, 95% 이상 높은 효과를 보였다. 그러나 단제(Butachlor, Thiobencarb, Molinate, Dithiopyr, Mefenacet, Pyriminobac, Cafenstrole 및 Pyriftalid)의 경우, 설포닐우레아계 혼합제보다 낮은 방제 효과를 보였고, 나주 수집종에 비해 부여 수집종에서는 이들 단제 제초제에 대한 방제효과가 낮았다. 한편, 종자번식 벗풀은 수집종에 관계없이 파종 후 30∼60일 사이에 경엽처리 제초제, Bentazone, Bentazone+MCPA 및 Penoxulam를 처리할 경우, 100% 방제가 가능하였다.
Efficacy of The Post-emergence Herbicide Pyribenzoxim in Wet Direct-seeded Rice in Thailand
Gu, Seok-Jin ; 피사마이, 차왈리통폰 ; 피툰, 카오테파완 ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 89~97
Two field tests in wet direct-seeded rice were conducted in Suphanburi Province, Thailand in 2001. Treatments included pyribenzoxim (5% EC) at 20, 30, 40, and 50 g ai ha-1 applied at 12 days after seeding (DAS), propanil (36% EC) 2,000 g ai ha-1 at 10 DAS, and hand weeding at 30 DAS and untreated control. In the both sites, pyribenzoxim controlled Echinochloa crus-galli, Ischaemum rugosum, Sphenoclea zeylanica, Aeschynomene indica, Cyperus difformis, Cyperus iria, and Fimbristylis miliacea excellently (>90%). At rates of 40, 50 g ai ha-1, the herbicide controlled Leptochloa chinensis in addition to the above-mentioned weeds. There was no rice phytotoxicity in all the rates. Due to the excellent weed control and high rice safety, final rice yield was significantly (>30%) higher than the untreated control.
논에서 Sulfonylurea계 제초제 저항성 올챙이고랭이(Scirpus juncoides Roxb.)의 관리와 경합특성
Park, Tae-Seon ; Jo, Jeong-Rae ; Mun, Byeong-Cheol ; Gang, Chung-Gil ; Park, Jae-Eup ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 98~107
Scirpus juncoides dominating in rice fields where sulfonylurea(SU) herbicides were applied repeatedly over several seasons was confirmed to be resistant to several SU-herbicides in Korea. In rice field dominated with SU-resistant Scirpus juncoides, Monochoria vaginalis and Cyperus difformis, Scirpus juncoides was far less effective than two species to pyrazosulfuron+pyrazolate+ simetryn GR, pyriminobac+pyrazosulfuron+carfentrazon GR, azimsulfuron+carfentrazone+pyriminobac GR, herbicides used broadly for management of SU-resistant weeds in farmhouses. Herbicides with alternative mode of action including benfuresate, benzobicyclon and HAR provided good control of resistant Scirpus juncoides in greenhouse. Cafentrazone, comeprop, fetrazamide, mefenacet, pyrazolate and simetryne did not reduce Scirpus juncoides densities, but surviving plants were stunted. To delay or control of SU-resisrant Scirpus juncoides, these alternative herbicides applied alone or in SU-mixtures could be incorporated into a herbicide rotation. In the interspecific competition according to SU-resistant Scirpus juncoides density in constant the rice plants in rice field, the growth and photosynthesis rate of rice plants, and rice grain yield were a linear decrease with the increase of Scirpus juncoides density. The most significant difference of rice grain yield was Scirpus juncoides density of 25 plants per one plant of rice. Rice grain yield were reduced about 5, 25, 30 and 40% by Scirpus juncoides densities of 10, 25, 50 and 100 plants/rice plant. These data suggest that the sound management practice in rice fieldes dominated with SU-resisrant Scirpus juncoide is essential to prevent the decrease of rice grain yield.
Weed Occurrence Yearly in Fallow Land and Method of Weed Control in Rice Paddy Field Converted from Fallow Land
Lee, In-Yong ; Park, Nam-Il ; Gwon, O-Seok ; Park, Jong-Hyeon ; Lee, Yong-Gi ; Ji, Seung-Hwan ; Im, Eun-Sang ; Park, Jae-Eup ;
Korean Journal of Weed Science, volume 26, issue 1, 2006, Pages 108~114
휴경논에서 연차별 잡초발생 양상을 조사하고 휴경논을 다시 논으로 전환하였을 경우 효율적인 잡초방제체계를 확립하기 위하여 시험을 수행한 결과를 요약하면 다음과 같다. 휴경논에 발생하는 초종은 피, 미국가막사리, 개망초 등이 많이 발생하였으며, 은수원사시나무, 버드나무 등의 목본류도 휴경 2년차부터 발생하기 시작하여 그 우점도가 점차 커지는 경향을 보였다. 3년차 휴경논을 4년차에 다시 벼를 재경작 할 경우 이앙전에 benzobicyclon 3.5% 액상수화제나 oxadiazone 12% 유제를 처리하고 이앙 후 10일에 azimsulfuron+bensulfuron-methyl+indanofan 0.54% 입제 및 pyrazosulfuron-ethyl+molinate 5.07% 입제의 체계처리에서 각각 95%이상 잡초가 방제되었으며, butachlor 5% 입제 처리 후 bentazone 40% 액제로 체계처리한 결과 100%의 잡초방제효과를 나타냈다. 그리고 이앙 후 10일에 azimsulfuron+bensulfuron-methyl+ indanofan 0.54% 입제와 pyrazosulfuron-ethyl+molinate 5.07% 입제의 단독 처리구에서 각각 99.3∼99.4%의 잡초방제효과를 나타냈다. 쌀 수량은 제초제의 전체 처리구에서 유의차가 없었다.